Dramatic Effects of the Substituents on the Solid-state Fluorescence Properties of Structural Isomers of Novel Benzofuro[2,3-c]oxazolocarbazole-type Fluorophores
[EN] PHOTOINITIATORS FOR UV-LED CURABLE COMPOSITIONS AND INKS<br/>[FR] PHOTOINITIATEURS POUR COMPOSITIONS DURCISSABLES PAR DEL UV ET ENCRES
申请人:AGFA GEVAERT
公开号:WO2011069947A1
公开(公告)日:2011-06-16
A specific type of carbazole photoinitiator is capable of providing radiation curable compositions that are curable by UV LEDs and do not exhibit an unstable yellowing behaviour in an image upon storage like ITX.
Synthesis and Solid-State Fluorescence Properties of Structural Isomers of Novel Benzofuro[2,3-c]oxazolocarbazole-Type Fluorescent Dyes
作者:Yousuke Ooyama、Yusuke Kagawa、Yutaka Harima
DOI:10.1002/ejoc.200700247
日期:2007.8
their solid-statefluorescence excitation and emission spectra were quite different, and a drastic fluorescence enhancement was found to be caused by the N-alkylation of the fluorophores; the fluorophores 3d and 4d (R = 5-nonyl) with sterically hindered substituents exhibited strong solid-statefluorescenceproperties. Semi-empirical molecular orbital calculations (AM1 and INDO/S) and solid-state fluorescent
Photovoltaic performance of dye-sensitized solar cells based on donor–acceptor π-conjugated benzofuro[2,3-c]oxazolo[4,5-a]carbazole-type fluorescent dyes with a carboxyl group at different positions of the chromophore skeleton
Donor-acceptor pi-conjugated benzofuro[2,3-c]oxazolo[4,5-a]carbazole-typefluorescentdyes 3a, 3b, 8a, and 8b with a carboxyl group at different positions of the chromophore skeleton have been designed and synthesized. The absorption and fluorescence spectra and cyclic voltammograms of the fluorescentdyes agree very well, showing that the position of the carboxyl group has a negligible influence on
设计了供体-受体共轭π-苯并呋喃[2,3-c]恶唑并[4,5-a]咔唑型荧光染料3a,3b,8a和8b,在发色团骨架的不同位置带有羧基。合成的。荧光染料的吸收光谱和荧光光谱以及循环伏安图非常吻合,表明羧基的位置对这些染料的光物理和电化学性质的影响可忽略不计。但是,当将这些染料用于染料敏化太阳能电池时,它们的光致性能却大不相同。在模拟的太阳光下,短路光电流和能量转换效率按以下顺序增加:3a(2.12 mA cm(-2),1.00%)约3b(2.10 mA cm(-2),1.06%)> 8b(1.50) mA cm(-2),0.67%)> 8a(0.84 mA cm(-2),0.34%)。基于半经验分子轨道计算(AM1和INDO / S)以及光谱分析及其光电子性能,观察到的光电子性能与苯并呋喃[2,3-c]恶唑[4,5]的化学结构之间的关系讨论了-a]咔唑型荧光染料。发现TiO(2)表面和染料
UV-LED CURABLE COMPOSITIONS AND INKS
申请人:Loccufier Johan
公开号:US20120283349A1
公开(公告)日:2012-11-08
A radiation curable composition for UV LED curing includes at least one co-initiator selected from the group consisting of an aliphatic tertiary amine and a dialkyl aniline derivative; and at least one specific carbazole photoinitiator. The radiation curable composition can be advantageously used to prevent unstable yellowing behaviour in an image upon storage.
PHOTOINITIATORS FOR UV-LED CURABLE COMPOSITIONS AND INKS
申请人:Loccufier Johan
公开号:US20120309861A1
公开(公告)日:2012-12-06
A specific type of carbazole photoinitiator is capable of providing radiation curable compositions that are curable by UV LEDs and do not exhibit an unstable yellowing behaviour in an image upon storage like ITX.