first_imgCholmcille Football & Hurling Team Guard of HonourPresident of the GAA Liam O Neill has been given a warm welcome at Scoil Cholmcille Letterkenny as part of his promotion of Ulster Féile 2014.The President took part in a short Q&A with 5th and 6th class pupils.Scoil Cholmcille football and hurling teams formed a Guard of Honour to welcome him to the school. Sean Boyle, President of St Eunan’s GAA club, Paul Carr Chairman of St Eunan’s GAA Club were in attendance as well.And of course Mr Rory Kavanagh, County player and teacher along with Mr Paraig Cannon sincerely welcomed the GAA President.Mr O’Neill entertains some teachers…including county star RoryPaul Carr- Chairman St Eunan’s GAA club/Charlie McAteer-Secretary St Eunan’s GAA club/Sean Boyle-President St Eunan’s GAA club.Liam O Neill-President GAA/Paraig Cannon-Principal/Sean Boyle-President St Eunan’s club/Rory Kavanagh-County Player & Scoil Cholmcille teacher.   GAA PRESIDENT GETS SPECIAL WELCOME AT SCOIL CHOLMCILLE was last modified: May 13th, 2014 by John2Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window) Tags:GAA presidentLiam O’Neillscoil cholmcilleSt Eunan’s GAA clublast_img read more

first_imgUnder level 6B water restrictions, the City of Cape Town limits residents to using 50 litres of water per person per day. Meanwhile, businesses are finding innovative ways to cut water consumption.There are many ways to save water. One restaurant in Stellenbosch, for example, uses the water in which spinach is cooked, to wash dishes. (Image: Brand South Africa)Brand South AfricaThe City of Cape Town will implement level 6B water restrictions from 1 February 2018. This means that each person in the city is limited to 50 litres of water per day for at least the next 150 days.Dam levels in the region are extremely low, and it was announced on 23 January that Day Zero had been pushed forward to 12 April 2018. Day Zero is when the taps run dry; from that day, residents will be forced to stand in line at designated water points to collect an allocated 25 litres of water per person per day.As part of efforts to relieve pressure on rapidly dwindling water resources in the region, the national Department of Water and Sanitation had partnered with the City on a joint blitz on unlawful water activities in Mfuleni, according to the South African Government News Agency.The focus of the operation was to address all current water use contraventions and compliance with the water restrictions, particularly targeting informal carwashes, said the department.On 25 January 2018, for example, several fines were issued, mostly for using municipal drinking water at informal carwashes without special exemption. On the previous day, the department conducted compliance monitoring on farms in the Malmesbury and Tulbagh areas.Meanwhile, businesses across Cape Town are implementing strategies to cut their water use.Organisers of the Sun Met, known as Africa’s richest race day, brought in 60,000 litres of water from outside Cape Town for guests and racegoers. The annual race was held on Saturday, 27 January this year, at Kenilworth Racecourse.Taps at the racecourse were not used on the day, as a commitment to support the province’s drive to conserve the scarce resource, the organisers said.Wine farms saving waterThere had been a rapid increase in the use of drip irrigation from about 30% of farms in 1996 to 59% in 2012 in the wine industry, according to Kevin Cilliers, KwaZulu-Natal regional manager of the National Cleaner Production Centre South Africa (NCPC-SA).Cilliers said wine estates such as Boschendal had explored more efficient methods of irrigation to use only what was needed.Drip irrigation is a type of micro-irrigation that has the potential to save water and nutrients by allowing water to drip slowly to the roots of plants, either from above the soil surface or buried below the surface.There was a heightened sense of awareness of water consumption and management in the wine sector, said Cilliers. “Many wine producers such as Spier, Boschendal, Lourensford and Elgin Orchards have embarked on interventions to manage and eradicate alien vegetation species around their rivers, so as to reduce losses and to remediate the waterways.”In another example, significant progress had been made at Spier with installation of a centralised waste water treatment facility comprising reed beds. “The company has achieved 100% recycling of effluent generated for watering of gardens and grounds.”Businesses playing their partIt had closed all showers in its domestic and international lounges at the airport, the Slow Lounge at Cape Town International Airport told Tourism Update. It also encouraged water saving in toilets and at basins, and had posted notices in the lounge bathrooms.Slow Lounge could not confirm when its showers would reopen.Agents and tour operators have been advised by Cape Town Tourism to inform clients of the water restrictions in the city and to ask them to be mindful when consuming water anywhere in the airport or the city.On Friday, 15 December, Siemens Southern and Eastern Africa encouraged people travelling from Gauteng to participate in a social experiment and exchange five kilograms of their on-flight baggage allowance for five litres of water.The experiment, called Siemens Airdrop, uses a voucher system: passengers with enough unused (5kg or more) luggage receive a voucher in Johannesburg and on arrival in Cape Town receive a five-litre bottle of water in exchange. Operating on a first come, first serve basis, there are 1,000 vouchers available.The AirDrop collection stand is in the arrivals area, opposite Woolworths. Uncollected water is donated to Gift of the Givers.Meanwhile, Business Live has reported that pasta and boiled vegetables are disappearing from menus at several restaurants in Cape Town.Pane E Vino Food and Wine Bar reused most of its water, said Akihirah Erasmus, head of the kitchen at the Stellenbosch eatery. “The water we use to cook our spinach is reused to wash our dishes; we use the water we wash our cutlery with for our garden.” Staff are also encouraged to bring their own drinking water.The Vineyard Hotel in Newlands has removed pasta from menus at its restaurants and patrons can no longer order boiled vegetables. Different cooking techniques had been implemented to save water, said executive chief Carl Van Rooyen. “We don’t boil anymore, we steam.” Deep frying was another method used.Managing the droughtThe national Department of Water and Sanitation, together with the City of Cape Town and the Western Cape department of local government, environment and development planning, had held several meetings in an effort to manage and mitigate the effects of the drought on water availability for the province, said Water and Sanitation Minister Nomvula Mokonyane.The Restrictions Management Committee and the Joint Operations Centre had been set up to oversee drought management functions and interventions with the joint participation of local, provincial and national government.Through these efforts a Water Indaba, bringing together the government, the private and agricultural sectors, as well as academics and water experts, was convened to investigate solutions and action necessary to avert a water black-out.“As a department we have successfully intervened and saved several provinces that were devastated by the drought over the last three years and will continue to do so in the Western Cape as well,” Mokonyane said.Over the next few days, she would hold several follow-up meetings with the various stakeholders to assess progress of the implementation of current interventions as well as new interventions necessary to avert #DayZero.For more information and water restriction guidelines, visit the City of Cape Town’s website.Source: South African Government News Agency, City of Cape Town, Tourism Update, Business Live and SiemensWould you like to use this article in your publication or on your website? See Using Brand South Africa material.last_img read more

first_imgMemorial Day, formerly known as Decoration Day, is a day of remembrance for those who have died in service of the United States of America. Memorial Day was borne out of the Civil War as a desire to honor those who fought and died.May 5, 1868, General John Logan, national commander of the Grand Army of the Republic proclaimed “The 30th of May, 1868, is designed for the purpose of strewing with flowers, or otherwise decorating the graves of comrades who died in defense of their country during the late rebellion, and whose bodies now lie in almost every city, village and hamlet churchyard in the land.”In 1873, New York became the first state to officially recognize the holiday, and by 1890, Memorial Day was recognized in all of the northern states. The south refused to acknowledge the day, instead honoring their dead on separate days. After World War I, both the northern and southern states recognized the date and changed the holiday from only honoring those from the Civil War to honoring Americans who died fighting in any war.Memorial Day is now observed in almost every state on the last Monday in May. In December 2000, the National Moment of Remembrance resolution was passed, which asks that at 3 p.m. local time, for all Americans “to voluntarily and informally observe in their own way a Moment of remembrance and respect, pausing from whatever they are doing for a moment of silence or listening to ‘Taps.’”In traditional observance, the flag of the United States is raised to the top of the staff and then solemnly lowered to half-staff, where it will remain until noon. The half-staff position remembers the men and women who gave their lives in service to their country. At noon the flag is raised to full-staff for the remainder of the day to symbolize our memory of those who served and paid with their lives as well as symbolizes the livings resolve not to let their sacrifice be in vain, but to rise up in their stead and continue the fight for liberty and justice for all.Other traditional observations include visiting cemeteries, placing flags or flowers on the graves of our fallen heroes, visiting memorials and wearing red poppies.In 1915, Moina Michael conceived an idea to wear red poppies on Memorial day in honor of those who died serving the nation during war. Inspired by the poem “In flanders fields,” Moina wrote her own poem:We cherish too, the Poppy redThat grows on fields where valor ledIt seems to signal to the skiesThat blood of heroes never dies.This memorial day please take a moment to remember what this day is really about. Information for this article retrieved from http://www.usmemorialday.org/This MFLN-Military Caregiving concentration blog post was published on May 27, 2016.last_img read more

first_imgThe Academy Color Encoding System aims to be the filmmaking industry standard for managing color.Top image via ICG MagazineThe Academy of Motion Picture Arts and Sciences strives to protect, archive, and advance the arts and sciences of motion pictures. The organization is mostly known for awarding the Oscars, but the seventeen branches and Board of Governors also work to standardize various processes and workflows for production, post-productions, and archiving.The Academy Color Encoding System (ACES) was designed to be the industry standard for color. It covers the entire process of filmmaking — from image capture, editing, VFX, presentation, archiving, and future remastering.ACES brings a unifying workflow to an industry that has seen many secret sauces from the various facilities providing post services. It also provides an archive format that can be restored at any time in the future, with confidence that the original intent of the creators can be reproduced. — Dave ColeWhat is ACES?ACES (Academy Color Encoding Systems) is a series of guidelines and specifications for every type of color management, from image capture to post-production to distribution. ACES is a free and open color management system, meaning it is not tied to a specific platform or program. It’s designed to work with the technology of today, as well as future workflows. The ACES color space includes everything the human eye can see, meaning there are no restrictions or limitations of the color space.It is not a program or workflow or “look.” ACES was designed to help you with your workflow. ACES consists of encoding specifications, transform definitions and guidelines, metadata definitions, standard screen specifications, and the specifications for archive-ready image data and metadata.Take a look at this ACES IBC panel from 2015 for a great breakdown.Why was ACES created?As digital workflows have increasingly dominated all aspects of filmmaking, ACES was created to reign in all the various formats and codecs. A single production can use different types of digital cameras to capture images, each using their own media format. In post, the same film may be edited in different locations while VFX are created in other production houses. Finally, when a film is distributed — different deliverables are created for theaters, digital distribution, streaming, discs, and even mobile.In all, dozens of formats and color encoding schemes can be used — and often without any metadata. ACES 1.0 was created to solve integration issues, all while keeping a consistent and high-quality color management. Essentially, ACES established a common standard so motion pictures could be efficiently and predictably created and preserved.Robbie Carman has a great four-part breakdown of the ACES process over on Mixing Light. Outside of the ACES overview he presents, Carman also shows you how to setup ACES workflows in DaVinci Resolve, round tripping VFX in ACES, and touches on the various versions of ACES.Adopting ACESImage The Lego Movie via Animal LogicACES is becoming popular among large scale blockbuster films, especially those that tend to be CG/VFX heavy. The growing list of films using ACES standards include Chappie, The Lego Movie, Oblivion, The Legend of Tarzan, and Guardians of the Galaxy Vol. 2.If you want to consider adopting ACES standards in your productions, you can dive into all the technical writings on ACES by visiting the ACES Documentation page. Additionally, you can find other support and resources at ACES Central, the dedicated hub and forum for all things related to ACES color encoding.An example of the type of content you will find on ACES Central is this in-depth case study from Glenn Gainor, the President of Physical Production at Screen Gems. He describes how ACES was integrated on set, in post, and in archiving. Also, Screen Gems editor Shelly Westerman talks about using ACES when editing The Wedding Ringer and About Last Night.Do you have any experience with ACES? Join the discussion below.last_img read more

first_imgWILMINGTON, MA — Below are some of the newest job openings in Wilmington:Full-Time Sales Data Analyst (Entry Level) at SOVOS ComplianceFull-Time Multimedia Coordinator at SymboticFull-Time Reagent Manufacturing Associate (Contract) at T2 BiosystemsFull-Time HR Systems Analyst at Charles River LabsFull-Time Supervisor (MDX) at Charles River LabsFull-Time Laboratory Technician at Charles River LabsFull-Time Product Marketing Specialist at LEDVANCEFull-Time Marketing Specialist at AltroFull-Time Bench Worker at TecometFull-Time Pesticide Applicator at Garrick-Santo Landscape Co.(NOTE: Wilmington businesses — Feel free to send me your job postings at wilmingtonapple@gmail.com.)Like Wilmington Apple on Facebook. Follow Wilmington Apple on Twitter. Follow Wilmington Apple on Instagram. Subscribe to Wilmington Apple’s daily email newsletter HERE. Got a comment, question, photo, press release, or news tip? Email wilmingtonapple@gmail.com.Share this:TwitterFacebookLike this:Like Loading… RelatedNOW HIRING: 10 New Job Openings In WilmingtonIn “Business”NOW HIRING: 10 New Job Openings In WilmingtonIn “Business”NOW HIRING: 60 New Job Openings In Wilmington (Week of August 11, 2019)In “Business”last_img read more

first_imgBanks with an exposure of ₹40,000 crore in Bhushan Steel are said to be in talks to appoint a management agency to monitor the company’s operations.The step taken by the group of banks is followed by the arrest of Neeraj Singhal, vice chairman and managing director of the company. Singhal has been taken into custody in connection with an alleged ₹50 lakh bribery case involving Syndicate Bank chairman S K Jain.”SBI has an exposure of Rs 6,000 crore in the company. We are in talks with other banks, including Punjab National Bank which is the consortium leader for term loans, to appoint a management agency to handle day-to-day affairs. Banks may approach the board of the company with the proposal,” Financial Express quoted SBI chief Arundhati Bhattacharya.”Even in this case I don’t think the borrower would have any objections.”Bhattacharya added that the bank has no plans to change its loan sanction process in the wake of Syndicate Bank bribery charges.”There’s no policy change. We accept proposals and adopt strict due diligence while processing the loan applications. It (Syndicate Bank chairman’s arrest) seems to be an aberration. It should be treated as an incident at an individual level,” she added.Bhushan Steel’s borrowings were at ₹21.6 thousand crore, while sort term debt was ₹5.2 thousand crore as on 31 March.Incorporated in 1989, Bhushan Steel reported net loss of ₹19.57 crore in Q4 March 2014, against its net profit of ₹280 crore in Q4 March 2013. Net sales plunged by 10.9 percent to ₹2,399.73 crore in Q4 March 2014 over Q4 March 2013.During the year 2013-14, the company took a loan of ₹1, 042 crore from Axis Bank. Bhushan Steel facility is located in Sahibabad (Uttar Pradesh), Khopoli (Maharashtra) and Meramandali in Orissa state.On Friday, stock price of the company slipped as much as 10 percent or ₹24.40 to end up ₹219.60 per share.last_img read more

first_imgFILE PHOTO: A worker rides a bicycle at the Bharat Petroleum Corporation Ltd. refinery in Mumbai, India April 24, 2008. REUTERS/Punit Paranjpe/File PhotoReutersGovernment-owned Bharat Petroleum Corporation Ltd (BPCL) plans to pump in Rs 18,000 crore to expand its refineries over the next five years, with an aim to increase the company’s refining capacity by 19 million tonnes (mt).The company will boost the Assam-based Numaligarh refinery plant’s capacity from 3 mt to 9 mt per annum. The company– which deals in the refining of crude oil and marketing of petroleum products– is planning to raise the capacity of its refineries in Mumbai, Kochi and Bina to at least 15 mt, Business Standard reported.The business daily quoted Chairman and Managing Director of BPCL, D Rajkumar saying, “Including our subsidiaries, our refining capacity is somewhere about 31 mt, we are planning to move closer to 50 mt by somewhere around 2022. This will see an investment of approximately about Rs 18,000 crore.”This expansion is a part of company’s major road map to spend Rs 1.08 lakh crore in next five years. “The company also has retail expansion plans of adding more than 1,000 outlets a year,” Rajkumar saidAt present BPCL is the third-largest crude refiner and marketer of petroleum products in India. Of the total 59,595 fuel retail outlets in India, BPCL owns about 14,000. In financial year 2016, major oil refiners and marketing companies likes HPCL, Essar Oil, Indian Oil along with BPCL added 2,770 retail diesel and petrol stations.During the quarter ending June 30, BPCL’s net profit fell 72% to Rs 745 crore from Rs 2,621 crore in the year-ago period. The company’s gross refining margin, or profit earned on each barrel of crude processed, plunged to $4.88 per barrel, compared to $6.09 per barrel during the corresponding quarter last year.As India switched to daily revision of petrol and diesel prices starting June 16, crude oil price in India rose by about 12 percent.last_img read more

first_img Popular on Variety ×Actors Reveal Their Favorite Disney PrincessesSeveral actors, like Daisy Ridley, Awkwafina, Jeff Goldblum and Gina Rodriguez, reveal their favorite Disney princesses. Rapunzel, Mulan, Ariel,Tiana, Sleeping Beauty and Jasmine all got some love from the Disney stars.More VideosVolume 0%Press shift question mark to access a list of keyboard shortcutsKeyboard Shortcutsplay/pauseincrease volumedecrease volumeseek forwardsseek backwardstoggle captionstoggle fullscreenmute/unmuteseek to %SPACE↑↓→←cfm0-9Next UpJennifer Lopez Shares How She Became a Mogul04:350.5x1x1.25×1.5x2xLive00:0002:1502:15 Razer Wednesday night unveiled the Razer Phone 2, a redesigned take on its category-defining gaming phone with a beefed up processor, enhanced cooly system, wireless charging support, and Razer Chroma lighting.The phone, which goes on pre-order this week for $800, still features a 120 Hz screen refresh and touch sampling and now also has two front-facing speakers.A big element of the redesign was making sure that the Razer Phone 2 would be more than simply a good phone for gaming.“It needed to be not just a gaming phone, but a great phone,” said Michael Breslin, head of global marketing and sales mobile business at Razer. “We completely redesigned the phone from the ground up for a multitude of reasons.”Chief among them was likely the sub-par reviews the original phone received when it came to using the device to do things like take pictures.center_img “One of the biggest points of consumer feedback was around camera performance and imaging quality,” said Vivek Gowri, senior manager of hardware at Razer. “We knew that was going to be very critical for us.”The Razer Phone 2 now has two rear cameras: a 12 MP wide-angle with optical image stabilization and a 12 MP telephoto with two times zoom. This time around the cameras use Sony IMC sensors and are tuned to produce low-noise images with a wider gamut of colors. The front of the phone features an 8 MP lens that supports streaming at full HD resolution. The Razer Phone 2’s camera app has also been completely redesigned. While the body of the phone looks similar to the original, it now has a glass back which supports wireless charging. The phone is also now 1P67 rated, meaning it can be submerged for up to 30 minutes without damage.The back of the phone features Razer’s three-headed snake logo, which can change colors using the company’s Chroma system.Inside, the phone is powered by the Qualcomm 845 Snapdragon chipset and  Qualcomm Adreno 630 graphics processing unit. Razer redesigned the cooling system as well, expanding the vapor chamber to give it a much larger surface area for heat dissipation.“We didn’t want to have a phone that had good framerates for 10 minutes and bad framerates for 50,” Gowri said. “That’s not anyone’s idea of a good gaming experience. Now we can spread heat throughout the phone and that means it can run faster for longer.”The phone also features a 4,000 mAH capacity battery and works with LTE Gigabit networks with download speeds of up to 1.2 Gbit per second.Alongside the new phone, Razer also unveiled a Raiju Mobile controller for the phone and USB-C ANC Razer Hammerhead earbuds.The controller features an adjustable phone mount and Bluetooth connectivity along with four remappable buttons, a directional pad, two thumbsticks, and two triggers with stops for hair-trigger mode. The $150 controller is due out the later this year.The new Razer Hammerhead USB-C earbuds draws its power for active noise cancellation from the phone and includes a built-in digital to audio converter for 24bit/96 kHz audio quality. It also has an in-line remote with volume control, ANC control, and play, pause, end call buttons. The $100 Hammerhead is due out on Oct. 22 via Razer’s website.last_img read more

first_imgAn idealized representation of the structure of NU-1000 based on single-crystal X-ray diffraction. Credit: (c) 2015 PNAS doi: 10.1073/pnas.1514485112 Mechanically interlocked molecules have several features that make them ideal candidates for molecular switches. These interlocked molecules, known as rotaxanes or catenanes, typically involve two molecular components that have distinct orientations based on interactions between them. Scientists can control which orientation the interlocked molecules take using stimuli, such as electrochemical potential or light. Redox active interlocked molecules are compelling candidates for a molecular switch. However, in solution, these molecules are unpredictable, and when it comes to designing circuitry, controlling the molecular switch is vital. This is where MOFs can be helpful. MOFs are highly porous materials. Other molecules can be trapped within the pores, and these pores can be chemically tailored to select for certain molecules. A group of researchers from Northwestern University in collaboration with Intel Labs and King Abdulaziz University have successfully captured a redox-active rotaxane within the pores of a premade MOF via post-synthetic building block replacement. Their paper is published in the Proceedings of the National Academy of Sciences.”As chemists, we have become proficient at manipulating molecular switches and rudimentary molecular machines in solution during the past quarter of a century,” said co-author Dr. Fraser Stoddart, “What we would really like to be able to do now is mount these switches inside porous solids in a rapid and changeable manner. This task has turned out to be easier said than done!”Previous research with mechanically interlocked molecules that are stabilized in a metal-organic framework involved building the MOF around the interlocked molecules in such a way that the “struts” of the MOF were also part of the interlocked molecule. There were several drawbacks to this process, including the need to optimize conditions so that a crystal would form, and in some cases, the molecules did not move, a necessary property for molecular switching. © 2015 Phys.org Citation: Solid-state molecular switches using redox active molecules in a porous crystal (2015, August 24) retrieved 18 August 2019 from https://phys.org/news/2015-08-solid-state-molecular-redox-molecules-porous.html (Phys.org)—A group of researchers have provided a proof-of-concept procedure for making a solid-state molecular-sized switch. They combined a mechanically interlocked molecule with a pre-synthetized metal-organic framework (MOF). Explore further McGonigal, et al. wanted to design a mechanically interlocked molecule that would fit within the pores of a pre-made MOF, rather than incorporate the molecule into the architecture of a novel MOF. They accomplished this by capturing a redox-active rotaxane within the pores of a zirconium-based MOF (NU-1000) post-synthetically using solvent-assisted ligand incorporation (SALI). Their model system provides a proof-of-concept.The first step in their procedure was to design the system. NU-1000 has hydroxyl groups that are oriented toward the center of a hexagonal channel. McGonigal, et al. realized that these hydroxyl groups could be displaced by carboxyl groups present in a rotaxane using solvent-assisted ligand incorporation (SALI). In this way, the carboxyl groups act as attachment points for the rotaxane. Their rotaxane needed to serve as a model system and work with their SALI procedure. They used a viologen-based molecule with a “stopper” on one end to ensure it becomes mechanically interlocked. Viologens are linear molecules comprised of two aromatic rings (pyridinium). This viologen was substituted with benzoic acid on one end to coordinate to the zirconium, and a benzene ring substituted with two tert-butyl groups to act as “stoppers.” Under reducing conditions, the viologen will complex with a tetracationic macrocycle containing two viologens as a result of radical-radical pairing interactions. The resulting semirotaxane was verified using spectroscopic methods.The newly formed mechanically interlocked molecule was then coaxed into the functionalized MOF. The semirotaxane diffuses through the channel of the MOF and is captured by coordinating to the Zr clusters. The t-butyl bulky end served as a “stopper.” Characterization studies verified that the semirotaxane was successfully incorporated into a post-synthetic MOF. The system was more stable than the semirotaxane in solution. Further, their studies indicated that the proportion of semirotaxane-to-MOF was not as expected. Rather than four semirotaxanes to one zirconium cluster, they observed a 1:1 ratio. Modeling showed that fewer dumbbells per channel allowed for packing in the channel without distorting the MOF architecture. Finally, electrochemical studies were done to confirm the switching behavior of the semirotaxane. McGonigal, et al. used electrophoretic deposition to deposit microcrystals of NU-1000 on conductive fluorine-doped tin oxide transparent electrodes. They then used their SALI procedure to obtain a thin film of the semirotaxane-MOF compound. Electrochemical studies confirmed that a large portion of the semirotaxane maintains its redox activity.According to Dr. Stoddart it was the simplicity of this this method that his group found appealing, “We make the molecular switches in solution, where we are already very comfortable with the chemistry, and then just mix them with some porous crystals. The switches insert themselves into the porous interiors of the crystals by means of some strong chemical bonds and that’s it! Switchable molecules slotted into crystals full of apace at the drop of a hat!” More information: “Electrochemically addressable trisradical rotaxanes organized within a metal-organic framework” PNAS DOI: 10.1073/pnas.1514485112AbstractThe organization of trisradical rotaxanes within the channels of a Zr6-based metal–organic framework (NU-1000) has been achieved postsynthetically by solvent-assisted ligand incorporation. Robust ZrIV–carboxylate bonds are forged between the Zr clusters of NU-1000 and carboxylic acid groups of rotaxane precursors (semirotaxanes) as part of this building block replacement strategy. Ultraviolet–visible–near-infrared (UV-Vis-NIR), electron paramagnetic resonance (EPR), and 1H nuclear magnetic resonance (NMR) spectroscopies all confirm the capture of redox-active rotaxanes within the mesoscale hexagonal channels of NU-1000. Cyclic voltammetry measurements performed on electroactive thin films of the resulting material indicate that redox-active viologen subunits located on the rotaxane components can be accessed electrochemically in the solid state. In contradistinction to previous methods, this strategy for the incorporation of mechanically interlocked molecules within porous materials circumvents the need for de novo synthesis of a metal–organic framework, making it a particularly convenient approach for the design and creation of solid-state molecular switches and machines. The results presented here provide proof-of-concept for the application of postsynthetic transformations in the integration of dynamic molecular machines with robust porous frameworks. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Journal information: Proceedings of the National Academy of Sciences Toward solid-state molecular circuitry: Molecular shuttle within a metal-organic frameworklast_img read more