基于卟吩的盘状液晶材料：一种介晶金属卟啉-四氰基对苯二醌二甲烷（TCNQ）加合物。

Discotic liquid-crystalline materials based on porphycenes: a mesogenic metalloporphycene-tetracyanoquinodimethane (TCNQ) adduct.

作者信息

Stepień Marcin, Donnio Bertrand, Sessler Jonathan L

机构信息

Department of Chemistry & Biochemistry, University of Texas, 1 University Station A5300, Austin, TX 78712, USA.

出版信息

Chemistry. 2007;13(24):6853-63. doi: 10.1002/chem.200700125.

DOI:10.1002/chem.200700125

PMID:17568457

Abstract

A number of substituted zinc(II) porphycenes and porphyrins have been synthesized as potentially mesogenic materials. One of the resulting porphycenes, bearing eight decyloxy chains, exhibits two mesophases, a transient lamellar phase (Lam) and a highly ordered lamello-columnar phase (L(Col)), with remarkably different structural characteristics. The same zinc(II) porphycene also forms an electron donor-acceptor (EDA) complex with tetracyanoquinodimethane (TCNQ), generating a hexagonal columnar mesophase (Col(h)) that is thermally stable up to ca. 200 degrees C. The EDA interaction between porphycene and TCNQ has been probed using electronic and vibrational spectroscopy. A mixture of zinc(II) porphyrins, isomeric with the above porphycene complex, forms a rectangular columnar mesophase (Col(r)).

摘要

人们已合成了多种取代的锌（II）卟啉和卟吩作为潜在的介晶材料。所得到的一种带有八条癸氧基链的卟吩呈现出两种中间相，一种是瞬态层状相（Lam）和一种高度有序的层状柱状相（L(Col)），它们具有明显不同的结构特征。同样的锌（II）卟吩还与四氰基对苯二醌二甲烷（TCNQ）形成电子给体-受体（EDA）配合物，生成一种六方柱状中间相（Col(h)），该中间相在高达约200摄氏度时热稳定。已使用电子光谱和振动光谱对卟吩与TCNQ之间的EDA相互作用进行了探究。与上述卟啉配合物异构的锌（II）卟啉混合物形成一种矩形柱状中间相（Col(r)）。