A chiral liquidcrystalline (LC) substituent with a fluorine-containing asymmetric moiety was introduced into the 3-position of a thiophene ring. Polymerizations of 2,5-dibrominated thiophene derivatives were carried out through dehalogenative polycondensations. Polythiophene derivatives thus prepared were fusible and soluble in ordinary organic solvents. An absorption band was observed in the range
Synthesis and characterization of alanine functionalized oligo/polythiophenes
作者:Christopher D. McTiernan、M’hamed Chahma
DOI:10.1039/c0nj00016g
日期:——
synthesis and characterization of a series of monothiophenes and terthiophenes bearing aminoacids are reported. The reaction of a thiophene, substituted in position 3 by either a carboxylic acid or an acetic acid moiety, with an alanine methylester in the presence of hydroxybenzotriazole (HOBt) and N,N′-dicyclohexylcarbodiimide (DCC) affords several mono/terthiophene-alanine methylesters. The latter
Chiral Conducting Surfaces via Electrochemical Oxidation of<scp>l</scp>-Leucine-Oligothiophenes
作者:Christopher D. McTiernan、Karim Omri、M’hamed Chahma
DOI:10.1021/jo100722v
日期:2010.9.17
with l and d free amino acid isomers are similar. The formation of hydrogen bonds between the chiral conducting surfaces and the free amino acids was characterized by 1H NMR. A chemical shift was observed for the N−H group in monomer 6 as a result of the hydrogen bond formation between the l-leucine methylester (d-leucine methylester, d/l-leucine methylester) and monomer 6.
带有特定手性中心的聚噻吩,例如1-亮氨酸,是通过一系列1-亮氨酸官能化的寡聚噻吩(单噻吩和三噻吩)的电化学氧化制备的。这些低聚噻吩已经通过的缩合制备升-亮氨酸甲酯和相应的在羟基苯并三唑的存在下并三唑(HOBt)和噻吩单体Ñ,Ñ′-二环己基碳二亚胺(DCC),然后将酯水解。电活性聚合物具有电化学稳定性,并且在电极表面(铂,金和玻璃碳)上表现出出色的粘合性能,并且在掺杂和未掺杂状态下都具有令人感兴趣的光学性能。使用循环伏安法检测游离氨基酸(1-亮氨酸,d-亮氨酸,l-丙氨酸,d-丙氨酸和d / l-丙氨酸)和基于l-亮氨酸的聚噻吩(手性导电表面)之间的氢键。初步结果表明,经修饰的电容电流升-亮氨酸-聚噻吩电极的减少是由于在手性导电表面的表面上形成了氢键势垒,同时伴随着氧化电位的移动。由手性导电表面与l和d游离氨基酸异构体的相互作用产生的循环伏安法响应是相似的。通过1 H NMR表征手性导电表面
Synthesis and Properties of Liquid Crystalline Polythiophene and Polythienylenevinylene Derivatives