描述了九种姜黄素及其二氟硼配合物的合成,其中七种含有内消旋-苯环。动态19 F NMR证实了以下事实:在室温下,后者的系统中该内-芳基片段的旋转受到限制,并且在更高的温度(> 45°C)下变得允许。处于固态的内消旋取代的衍生物的分子结构表明,相对于平均姜黄素平面,苯环位于高度扭曲的平面中。在不同极性的溶剂中研究了这九种化合物的光物理性质。中观用苯环取代对溶液中的荧光发射特性影响很小,内消旋和非取代化合物的辐射和非辐射动力学常数相似,这与BODIPY衍生物的情况相反。然而,在内消旋-苯环上引入电子给体对-甲氧基导致了姜黄素类π-系统荧光发射的小扰动。我们还报告了内消旋苯基对聚集固体排放特性的影响。
Transylidation of Some Stabilized Bismuthonium Ylides
作者:Hitomi Suzuki、Toshihiro Murafuji
DOI:10.1246/bcsj.63.950
日期:1990.3
dimethyl sulfide and triphenylarsine in benzene at room temperature, giving the corresponding sulfonium and arsonium ylides in moderate to good yields, but they failed to exchange the ylide functionality with triphenylphosphine in most cases and with triphenylstibine in all cases examined, decomposition leading to the C– or O-phenylation of 1,3-dicarbonyl portion being the major reaction that took place
Tuning Emission Lifetimes of Ir(C^N)<sub>2</sub>(acac) Complexes with Oligo(phenyleneethynylene) Groups
作者:Ross Davidson、Yu-Ting Hsu、Mark A. Fox、Juan A. Aguilar、Dmitry Yufit、Andrew Beeby
DOI:10.1021/acs.inorgchem.2c03934
日期:2023.2.13
with the Ir(ppy)2(acac) core. While the conjugated pOPE3 complexes show emissionlifetimes of 0.69–32.8 μs similar to the lifetimes of 1.00–23.1 μs for the non-OPE3 Ir(ppy)2(acac) complexes synthesized here, the decoupled aOPE3 and dOPE3 complexes reveal long emissionlifetimes of 50–625 μs. The long lifetimes found in aOPE3 and dOPE3 complexes are due to intramolecular reversible electronic energy transfer
Synthesis and Photophysical Properties of Difluoroboron Complexes of Curcuminoid Derivatives Bearing Different Terminal Aromatic Units and a <i>meso</i>-Aryl Ring
作者:Abdellah Felouat、Anthony D’Aléo、Fredéric Fages
DOI:10.1021/jo400389h
日期:2013.5.3
of the nine compounds were investigated in solvents of different polarity. Meso-substitution with a phenyl ring has little influence on fluorescence emission properties in solution, radiative and nonradiative kinetic constants being similar for meso- and nonsubstituted compounds, which is in contrast to the case of BODIPY derivatives. However, introduction of an electron donor p-methoxy group at the
描述了九种姜黄素及其二氟硼配合物的合成,其中七种含有内消旋-苯环。动态19 F NMR证实了以下事实:在室温下,后者的系统中该内-芳基片段的旋转受到限制,并且在更高的温度(> 45°C)下变得允许。处于固态的内消旋取代的衍生物的分子结构表明,相对于平均姜黄素平面,苯环位于高度扭曲的平面中。在不同极性的溶剂中研究了这九种化合物的光物理性质。中观用苯环取代对溶液中的荧光发射特性影响很小,内消旋和非取代化合物的辐射和非辐射动力学常数相似,这与BODIPY衍生物的情况相反。然而,在内消旋-苯环上引入电子给体对-甲氧基导致了姜黄素类π-系统荧光发射的小扰动。我们还报告了内消旋苯基对聚集固体排放特性的影响。
Inverse Design and Synthesis of acac-Coumarin Anchors for Robust TiO<sub>2</sub> Sensitization
作者:Dequan Xiao、Lauren A. Martini、Robert C. Snoeberger、Robert H. Crabtree、Victor S. Batista
DOI:10.1021/ja2020313
日期:2011.6.15
assist the synthesis and optimization of molecular sensitizers for dye-sensitized solar cells is introduced. The method searches for molecular adsorbates with suitable photoabsorption properties through continuous optimization of "alchemical" structures in the vicinity of a reference molecular framework. The approach is illustrated as applied to the design and optimization of linker chromophores for TiO(2)