设计,合成并充分表征了以四氮杂ach烯单元为核心的三个新颖的N-杂并六苯分子(SDNU-1,SDNU-2和SDNU-3)。对它们的光物理,电化学和荧光性质进行了研究,并且它们在固态下表现出蓝色至绿色的发射。有趣的是,SDNU-2表现出很高的固体光致发光量子效率(75.3%),这是迄今为止N-杂并并苯衍生物的最高值。通过使用开孔和闭孔Z-san技术进行了两光子吸收研究。SDNU-3的双光子吸收截面显着增强,幅度高达700 GM(1 GM = 1×10-50 cm 4 s /光子)在800 nm的光激发下,这是迄今为止通过使用Z扫描实验测得的异并四苯系统的最大值。我们将结果归因于四极取代基的强电荷转移与四氮杂环丁烯核之间的充分电子偶联。我们的结果将为设计基于N-杂茂并核的新型高效双光子材料提供新的指导。
A convenient synthesis of 2,5-diaroyl-4-hydroxy cyclopent-2-enones incorporating aromatic and heteroaromatic moieties
作者:Aswathy L. Balachandran、C. S. Athira、Ani Deepthi、E. G. Jayasree
DOI:10.1080/00397911.2019.1670851
日期:2019.12.17
Abstract The base-catalyzed reaction of 1,5-diphenyl-pentane-1,3,5-trione with aromatic/heteroaromatic 1,2-diones leading to the synthesis of 2,5-diaroyl-4-hydroxycyclopent-2-enones and its conversion to 2,5-diaroylcyclopentadienones is reported here. 2,5-Dibenzoyl-4-hydroxycyclopent-2-enone and 2,5-dithenoyl-4-hydroxycyclopent-2-enone are valuable compounds which act as chemosensors for selective
Effect of additional phenothiazine donor and thiophene π-bridge on photovoltaic performance of quinoxaline cored photosensitizers
作者:Jong Min Park、Chang Young Jung、Yue Wang、Hyun Dong Choi、Seong Je Park、Pinyin Ou、Woo-Dong Jang、Jae Yun Jaung
DOI:10.1016/j.dyepig.2019.107568
日期:2019.11
on the sense of directional electron transport from donor to acceptor. To facilitate an efficient intramolecular charge transfer, we introduced additional donor moieties and thiophene unit as light-absorbing chromophore and π-bridge. The photophysical and electrochemical properties of the synthesized dyes were investigated, and photovoltaic performances of the solarcells based on the sensitizers were
Inhibition of Carboxylesterases by Benzil (Diphenylethane-1,2-dione) and Heterocyclic Analogues Is Dependent upon the Aromaticity of the Ring and the Flexibility of the Dione Moiety
作者:Janice L. Hyatt、Vanessa Stacy、Randy M. Wadkins、Kyoung Jin P. Yoon、Monika Wierdl、Carol C. Edwards、Matthias Zeller、Allen D. Hunter、Mary K. Danks、Guy Crundwell、Philip M. Potter
DOI:10.1021/jm0504196
日期:2005.8.1
include the dione moiety and the benzene rings, and substitution within the rings affords increased selectivity toward CEs from different species. Replacement of the benzene rings with heterocyclic substituents increased the K(i) values for the compounds toward three mammalian CEs when using o-nitrophenyl acetate as a substrate. Logarithmic plots of the K(i) values versus the empirical resonance energy,
Synthesis of Low Band Gap [1,2,5]-Thiadiazolo[3,4-<i>g</i>]quinoxaline and Pyrazino[2,3-<i>g</i>]quinoxaline Derivatives by Selective Reduction of Benzo[1,2-<i>c</i>;4,5-<i>c</i>′]bis[1,2,5]thiadiazole
作者:Hairong Li、Teck Lip Tam、Yeng Ming Lam、Subodh G. Mhaisalkar、Andrew C. Grimsdale
DOI:10.1021/ol102465a
日期:2011.1.7
The reduction of a dithienylbenzobisthiadiazole derivative TBBT can be performed selectively so as to afford either [1,2,5]-thiadiazolo[3,4-g]quinoxaline (TQ) or pyrazino[2,3-g]quinoxaline (PQ) derivatives. This approach offers a much milder, shorter, and more efficient route to PQ and TQ derivatives than current methods. It is further shown how the optical and electrochemical properties of PQ and
可以有选择地进行二噻吩基苯并双噻二唑衍生物TBBT的还原反应,以提供[1,2,5]-噻二唑并[ 3,4- g ]喹喔啉(TQ)或吡嗪并[2,3- g ]喹喔啉(PQ)衍生物。 。与目前的方法相比,这种方法为PQ和TQ派生提供了更为温和,更短和更有效的途径。进一步显示了如何通过选择合适的取代基来调节PQ和TQ的光学和电化学性质。
Imidazole-Based Sensitizers Containing Double Anchors for Dye-Sensitized Solar Cells
作者:Yung-Sheng Yen、Jen-Shyang Ni、Tse-Yen Lin、Wei-I Hung、Jiann T. Lin、Ming-Chang P. Yeh
DOI:10.1002/ejoc.201501131
日期:2015.11
New imidazole-based organic dyes with two 2-cyanoacetic acid acceptors/anchors connected at the C-4 and C-5 positions, and a carbazole or arylamine donor connected at the C-2 position of the imidazole entity were synthesized and used as sensitizers for dye-sensitizedsolarcells. The dyes exhibit optical absorption from 300–600 nm with high molar extinction coefficients. The inclusion of a hexyl chain