Macroscopic Wires from Fluorophore-Quencher Dyads with Long-Lived Blue Emission
摘要:
We report the formation of macroscopic wires up to centimeters in length from a series of structurally flexible, covalently tethered small-molecular fluorophore-quencher dyads (FQDs, average MW = 425 Da), comprised of carbazole, melatonin, and cyanobenzoate moieties. These FQDs are nonemissive in organic solutions but become moderately to highly luminescent (Phi(F) = 0.037-0.39) upon formation of wires with emission maxima in the blue region (446-483 nm). The blue photoluminescence (PL) is ascribed to a combination of singlet charge transfer, localized triplet state, and possibly delayed fluorescence emissions with intrinsic luminescence lifetimes ranging from 0.228 to 21333 mu s, based on luminescence, transient absorption measurements, X-ray diffraction, and calculations.
“Flagella effect” of thermally activated delayed fluorescence emitter dominating the efficiency of non-doped solution-processed OLEDs
作者:Guimin Zhao、Yuheng Lou、Renjie Ji、Qiyin Ran、Haowen Chen、Wenwen Tian、Wei Jiang、Yueming Sun
DOI:10.1039/d3tc03484d
日期:——
functionalization of organic molecules in the aggregated state. Herein, by regulating the length and mold of the flexible chain attached to a thermallyactivateddelayedfluorescence (TADF) core, we propose the “flagella effect” of solution-processed emitters for non-doped organic light-emitting diodes. In the single-molecular state, the emission behavior of these molecules remained consistent because of the
柔性链在有机光电子和生物医学领域具有重要的研究价值,因为它们可以调节聚集状态下的有机分子的功能化。在这里,通过调节连接到热激活延迟荧光(TADF)核心的柔性链的长度和模具,我们提出了用于非掺杂有机发光二极管的溶液处理发射器的“鞭毛效应”。在单分子状态下,由于统一的TADF核,这些分子的发射行为保持一致;然而,聚集的薄膜表现出显着不同的发射特性。较长的烷基链提高了原始薄膜的光致发光量子产率(PLQY),但阻碍了载流子传输和平衡。或者,较短的烷基链可以匹配载流子迁移率,但会牺牲 PLQY 和颜色质量。因此,具有己烷链的分子的最大外量子效率(EQE max )为18.7%,约为具有乙烷链的分子的2倍,接近具有十二烷链的分子的80倍。此外,与同源烷基链相比,具有多氧链的分子仅达到2.1%的EQE max,这归因于原始薄膜中多氧链的高度结晶和聚集,经原子分析证实。力显微镜测量。
Organic semiconductor formulations
申请人:Flexterra, Inc.
公开号:US10043978B2
公开(公告)日:2018-08-07
The present teachings relate to organic semiconductor formulations including an organic semiconducting compound in a liquid medium, where the liquid medium includes (1) a compound in liquid state that has electronic properties complementary to the electronic structure of the organic semiconducting compound and optionally (2) a solvent or solvent mixture for solubilizing the organic semiconducting compound. The present formulations can be used as inks in the fabrication of organic semiconductor devices.
NITROOXYDERIVATIVES OF CARVEDILOL AND OTHER BETA BLOCKERS AS ANTIHYPERTENSIVE DRUGS
申请人:NicOx S.A.
公开号:EP1691804B1
公开(公告)日:2007-04-04
Nitrooxyderivatives of carvedilol and other beta blockers as antihypertensive
申请人:Del Soldato Piero
公开号:US20070072854A1
公开(公告)日:2007-03-29
The present invention relates to -adrenergic blockers nitrooxyderivatives of general formula (I):
A-(Y—ONO
2
)
s
and enantiomers and diastereoisomers and pharmaceutically acceptable salts thereof, pharmaceutical compositions containing them and their use for the treatment of hypertension, cardiovascular diseases, glaucoma, migraine headache and vascular diseases.