According to the present invention, there are provided a pyrimidine derivative represented by a general formula (1) indicated below, and an organic electroluminescent device comprising a pair of electrodes, and at least one organic layer sandwiched therebetween, wherein the pyrimidine derivative is used as a constituent material for the at least one organic layer. The pyrimidine derivative of the present invention is a material for a high efficiency, high durability organic electroluminescent device, is excellent in electron injection/transport performance, has hole blocking capability, and excels in characteristics.

Host materials with pentafluorophenyl substitution are described. These compounds are designed for, and used for hosting aza substituted dopants that may be susceptible to intramolecular deprotonation. In addition, the fluorinated substitution aids with electron transport within the emissive layer.

The present disclosure provides a nitrogen-containing heterocyclic compound having a general formula (I) and an organic photoelectric apparatus thereof. The compound of general formula (I) is: wherein A1, A2, A3, and A4 are independently selected from a hydrogen atom, a function group having a general formula (II); A1, A2, A3, and A4 include at least one function group having the general formula (II); R1 and R2 are independently selected from one of hydrogen, deuterium, C1-30 alkyl group, C6-30 aromatic group and C2-30 heterocyclic aromatic group; Y1 and Y2 are independently selected from substituted or non-substituted C and N,the general formula (II) being: wherein X is selected from one of oxyl group (—O—), sulfhydryl group (—S—), substituted or non-substituted imino group, substituted or non-substituted methylene group, and substituted or non-substituted silicylene group; and R3, R4, R5, R6, R7, R8, R9, and R10 are independently selected from one of hydrogen, deuterium, C1-30 alkyl group, C6-30 aromatic group, and C2-30 heterocyclic aromatic group.

The present disclosure provides a nitrogen-containing heterocyclic compound having a general formula (I) and an organic photoelectric apparatus thereof. The general formula (I) is: wherein A1, A2, A3, A4, A5, A6, A7, A8, A9, and A10 are independently selected from a hydrogen atom, a nitrile group and a function group having a general formula (II), and A1, A2, A3, A4, A5, A6, A7, A8, A9, and A10 include at least one nitrile group and at least one function group having the general formula (II),the general formula (II) being: wherein R1, R2, R3, R4, R5, R6, R7, and R8 are independently selected from hydrogen atoms, deuterium atoms, C6-30 aromatic group and C2-30 heterocyclic aromatic group.

Compounds containing indolocathazole, and aromatic and/or heteroaromatic building blocks, are disclosed in this application. These compounds are useful for application in organic electroluminescent devices.

The present invention relates to a delayed fluorescence-quantum dot (QD) electroluminescent diode, the delayed fluorescence-quantum dot electroluminescent diode includes an anode, a cathode, and a light emitting layer located between the anode and the cathode, and the light emitting layer includes a QD and a delayed fluorescence material which supplies energy to the QD.

An electro-hydraulic actuation system includes a regeneration valve in fluid communication with a first fluid chamber and a second fluid chamber of a hydraulic actuator, and a dump valve is in fluid communication with the second fluid chamber and a fluid reservoir. A pump provides a flow of fluid to the first and second fluid chambers, a displacement of the pump controlling a velocity of the actuator during motion in the retraction and extension directions. An electric motor drives the pump, and a controller controls a state of the regeneration valve and the dump valve. At least one feedback device senses a system condition and provides a respective feedback signal indicative of the sensed system condition to the controller, the controller responsive to the feedback signal to determine an occurrence of an over-center load condition and control a state of the regeneration valve and the dump valve in response to the occurrence to maintain the velocity of the actuator.

To provide a method of producing scented tissue paper. The problem is solved by performing shrink wrapping in which a tissue paper housing obtained by carrying fragrance-containing microcapsules on an inner surface of a housing box using a binder is covered with a shrink film and the shrink film is exposed to hot air W so as to be attached to the tissue paper housing, causing the fragrance-containing microcapsules to be detached from the binder by heating the tissue paper housing at the time of the shrink wrapping, and providing the scent for plural sheets of tissue papers.

A system for adaptive cooling and energy harvesting comprising at least one thermoelectric device capable of acting as a thermoelectric cooler and as a thermoelectric generator, a hierarchical multiple-level control system, and electronics controlled by the control system and connected to the thermoelectric device. The electronics selectively configure the thermoelectric device in at least in a thermoelectric cooler operating mode and in a thermoelectric generation operating mode. The thermoelectric device can incorporate quantum-process and quantum-well materials for higher heat transfer and thermoelectric generation efficiencies. The invention provides for thermoelectric devices to additionally operate in temperature sensing mode. The hierarchical control system can comprise a plurality of control system, each of which can operate in isolation and can be interconnected with additional subsystems associated with other hierarchical levels. The hierarchical control system can comprise linear (additive) control, bilinear (additive and multiplicative) control, nonlinear control, and hysteresis.

The other day as I scurried away through the door of my bank, I collided with the grim reaper passing me on his way into the building.

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HARRY Foyle stole the show with two best-yet individual performances as St Cross Symondians thrashed hapless New Milton by 162 runs to move fourth in the ECB Southern Premier Division.

Lyndhurst & Ashurst Cricket Club has reinstated an annual fixture – more than 100 years after it was last played.

Totton & Eling Tennis Centre has celebrated its 15th birthday by winning a national award at Wimbledon.

QUEEN Extravaganza, the official Queen tribute band produced by Roger Taylor and Brian May, returns to the UK in 2021 following sell out shows across the globe. It celebrates 50 years of Queen with a one night only show at Mayflower Theatre on Sunday January 31 among 26 dates across the UK.

Ricky Little is coming home to defend his Southern Area super-flyweight championship.

A CRISIS appeal to save a Fareham based charity has raised almost £50,000 in less than a

HOW do you bottle a summer’s day or gift wrap a woodland walk? A New Forest woman with a heightened sense of smell believes she has found the answer.

British Touring Car Championship drivers have been meeting fans and signing autographs at Westquay shopping centre, Southampton, ahead of this weekend's races at Thruxton.

A NEW hotel has been included in revamped plans for a major city centre development, the Echo can reveal.

FORMER Trojans hockey star Alex Danson has reached a half-century of goals for Great Britain.

SEVEN war memorials in Hampshire are among hundreds to be listed in a bid to protect thousands of memorials by next year - marking the centenary of the end of the First World War.

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For the past 18 years, saxophonist, flutist and educator Vincent York has carved out a unique niche in the Southeastern Michigan jazz and educational community with his multi-media and live performance program, Jazzistry. Saturday, November 12th, Vincent, his band and Jazzistry board members will receive national recognition for the program from The National Association for Multicultural Education, N.A.M.E. At the closing banquet of the convention Vincent York and Jazzistry will receive The Founder's Award for outstanding national multicultural program: The Rose Duhon-Sells Award of the National Association for Multicultural Education.

NPR's education reporter talks about what graduating seniors are going through right now as the colleges are closed due to the pandemic and answers their questions.

The 'In Da Club' rapper also reveals whether he still loves his 22-year-old son, whom he shares with Shaniqua Tompkins, and the possibility to patch things up with him.

Momentum building around one of Europe’s largest regeneration schemes in Solihull.

Indico Street Kitchen announces Mailbox opening date.

Warwick Arts Centre have announced their summer film series, including some whip-smart comedies guaranteed to make you forget the lousy weather.

22 jobs lost as Bromsgrove venue forecd to cease trading.

Support for mission to tackle loneliness in older people.

£15,000 raised for Birmingham Children’s Hospital.

Extinction Rebellion Youth to host 'die-in' at Primark and HSBC New Street.

Matt Lindley writes about recognition for the Central Library.

Lichfield date marks one hundred years of Bach in the city.

Glebe House holds onto its classic looks, its acres and its outbuildings – a perfect package in prime borderland, reports Marsya Lennox

Local brewers to feature in two-day festival.

Top-end property specialists launch in West Midlands and Warwickshire.

Assam cabinet held its meeting on Friday through video conferencing. Assam Industries and Commerce Minister Chandra Mohan Patowary said the 25 per cent hike will add Rs 1000 crore to the government's kitty.

UJAM has announced the release of its new virtual electronic drum instrument Beatmaker VICE, a plugin that features drum machine samples from the 1980s processed to 21st century sound standard. The instrument allows you to produce nostalgic beats that pack a punch with ready-made patterns and proprietary mix and effect automation. Inspired by some of […]

The post UJAM Beatmaker VICE delivers ’80s drums for the 21st century appeared first on rekkerd.org.

It can be noted that shopping centres and malls, which tend to attract a lot of crowds, have been shut since mid-March, much before the lockdown was announced and if the social distancing strategies continue post lockdown as well, such facilities are unlikely to open.

With an azcentral.com subscription, you can play a vital role in supporting local journalism that you and your community can trust.

A few years ago, I read George Packer’s “The Unwinding: An Inner History of the New America.” It was a haunting portrayal of the slow unraveling of the United States through the life stories of many individuals. Like so many others, I found the book to be fascinating. So, it was with great interest that I saw Packer had published a new book, this time focused on the late diplomat Richard Holbrooke. I recalled the name Holbrooke, but couldn’t say I knew a lot about him. Given how much I had enjoyed “The Unwinding,” I thought this book too would surely be worth a read. “Our Man: Richard Holbrooke and the End of the American Century” was an utterly engrossing portrait of not only the man, but also the decline of American power from Vietnam to Afghanistan. Through the person of Richard Holbrooke, we witness the follies and unforced errors that have haunted our foreign policy for the last forty years. We also witness the occasional triumphs – most notably Holbrooke’s masterful work in

A majority of IKEA stores are or have been temporarily closed in recent months. A few stores in Germany and Israel, as well as the one in Wuhan, the city in China where the coronavirus was first discovered, reopened this week.

As a part of WPSU’s radio, TV and web project “The Vietnam War: Telling the Pennsylvania Story,” we’re bringing you oral history interviews with Vietnam veterans. Suzann Tedesco talked to her husband Colonel Vincent Tedesco about leading men in Vietnam.

Assam cabinet held its meeting on Friday through video conferencing. Assam Industries and Commerce Minister Chandra Mohan Patowary said the 25 per cent hike will add Rs 1000 crore to the government's kitty.

Apple reopened 38 Apple stores which were temporarily closed after the epidemic, state-run China Daily reported. Only four stores remain closed.

With 600 Naturals outlets, Groom India today owns the country’s largest beauty and wellness chain.