Reactivity and Molecular Recognition: Amine Methylation by an Introverted Ester
作者:Byron W. Purse、Pablo Ballester、Julius Rebek
DOI:10.1021/ja036595q
日期:2003.12.1
methyl ester and its reaction with a series of tertiary amines. The reactionproduct is a complex of the host carboxylate with a guest quaternary ammonium salt. The rate of the reaction is highly dependent on the suitability of the amine to occupy the host cavity and the intrinsic reactivity of the resulting complex. A kinetic study of the reaction of 2-(dimethylamino)ethanol to produce choline gives
We demonstrated herein the facile synthesis of triisopropylsilylethynyl (TIPS) functionalized benzo[1,2-b:4,5-b′]dithiophene (BDT) for efficient polymer solar cells.
Electrochromic devices and thin film transistors from a new family of ethylenedioxythiophene based conjugated polymers
作者:Zhongtao Li、Yuan Zhang、Amanda L. Holt、Borys P. Kolasa、Justin G. Wehner、Andreas Hampp、Guillermo C. Bazan、Thuc-Quyen Nguyen、Daniel E. Morse
DOI:10.1039/c0nj00837k
日期:——
Newelectrochromicconjugatedpolymers and their corresponding devices based on EDOT (ethylenedioxythiophene) are described. The best of these polymers display response times on the order of 1s and high switchable contrast in the visible and near-infrared (Vis-NIR) spectral regions. Thin films (70 nm) of these newpolymers displayed optical band gaps on the order of 1.73 eV (7a) < 2.19 eV (7b) < 2
基于EDOT的新型电致变色共轭聚合物及其相应器件(乙二氧基噻吩)进行了说明。这些聚合物中最好的聚合物在可见光和近红外(Vis-NIR)光谱区域中显示大约1s的响应时间和高可切换对比度。这些新聚合物的薄膜(70 nm)表现出的光学带隙为1.73 eV(7a)<2.19 eV(7b)<2.23 eV(7c)<2.31 eV(4)<2.34 eV(2)它们对吸收边缘的外推。聚合物4和7a显示出约1的场效应空穴迁移率。6.7×10 -5 cm 2 V -1 s -1(开/关比10 4)和2.5×10-5 cm 2 V -1 s -1(开/关比10 3)分别与它们的高度有序的链间堆积有关,如通过聚合物4的XRD分析所证实的。电致变色表征表明,聚合物7a-c在低压下在红外中表现出明显的吸收变化。最终的固态器件有望为IR中的电致变色快门和滤光片提供希望,因为它们的高电荷转移迁移率和离子注入效率允许相对快
Synthesis, characterization, and photovoltaic properties of a low-bandgap copolymer based on 2,1,3-benzooxadiazole
PBDTBO, a conjugated polymer comprising benzo[1,2-b:4,5-b']dithiophene (BDT) and 5,6-bis(octyloxy)benzo[c][1,2,5]oxadiazole (BO) units, exhibits a deep HOMO energy level of -5.27 eV and excellent solubility. A device incorporating PBDTBO and [6,6]-phenyl-C(61)-butyric acid methyl ester (1:1, w/w) exhibited a power conversion efficiency of 5.7%.
Fluoro-functionalization of vinylene units in a polyarylenevinylene for polymer solar cells
作者:Antonio Cardone、Carmela Martinelli、Maria Losurdo、Elena Dilonardo、Giovanni Bruno、Guido Scavia、Silvia Destri、Pinalysa Cosma、Luigi Salamandra、Andrea Reale、Aldo Di Carlo、Aranzazu Aguirre、Begoña Milián-Medina、Johannes Gierschner、Gianluca M. Farinola
DOI:10.1039/c2ta00177b
日期:——
units and its non-fluorinated counterpart PDTBTV have been synthesized and characterized as donor materials in bulk heterojunction (BHJ) solar cells with PCBM as the acceptor. The solar cells with the fluorinated polymer show better photovoltaic performances than those recorded with the non-fluorinated material. Comparative spectroscopic and computational studies, together with morphological, electrical