Ajayaghosh Ayyappanpillai, Praveen Vakayil K
Photosciences and Photonics Group, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology (NIST), CSIR, Trivandrum 695 019, India.
Acc Chem Res. 2007 Aug;40(8):644-56. doi: 10.1021/ar7000364. Epub 2007 May 10.
This Account is focused on the self-assembly of p-phenylenevinylenes, a linear pi-system, which has been extensively studied over the years due to both fundamental and technological importance. A serendipitous observation of the gelation of an oligo( p-phenylenevinylene) (OPV) derivative in nonpolar hydrocarbon solvents that led to a new class of functional materials, namely, pi-organogels, is described. Strategies to control the size, shape, and functions of the supramolecular architectures of OPV self-assemblies are highlighted. Formation of nano- to microsized helical architectures, control on chromophore packing, self-assembly induced modulation of optical properties, and application as light-harvesting assemblies are the important features of this novel class of photonically and electronically active soft materials.
本综述聚焦于对苯撑乙烯（一种线性π体系）的自组装，多年来因其在基础研究和技术应用方面的重要性而受到广泛研究。本文描述了在非极性烃类溶剂中，一种聚对苯撑乙烯（OPV）衍生物意外发生凝胶化，从而产生了一类新型功能材料——π-有机凝胶。文中重点介绍了控制OPV自组装超分子结构的尺寸、形状和功能的策略。形成纳米到微米级的螺旋结构、控制发色团堆积、自组装诱导的光学性质调制以及作为光捕获组件的应用，是这类新型光电子活性软材料的重要特性。
