We present here the synthesis of several new isoalloxazine cyclophanes containing electroactive anthraquinones linked by aliphatic chains of different lengths. Such structural changes provide different interchromophoric orientations leading to the tuning of the rate of the photoinduced electron transfer process from the anthraquinone unit towards the isoalloxazine singlet excited state. Molecular modelling studies were undertaken in order to determine the minimal energy of the proposed structures using Monte Carlo calculations (Amber, Macromodel v.8.1). The compounds have been fully characterised by NMR spectroscopy and the solid state structures of some of the macrocycles have been elucidated. The photophysical studies have been carried out in order to investigate the influence of π–π stacking on the optical properties of the macrocycles.
我们在此介绍几种新型异咯嗪环烷的合成方法,它们含有通过不同长度的脂肪族链连接的电活性
蒽醌。这种结构变化提供了不同的色素间取向,从而调整了从
蒽醌单元到异咯恶嗪单激发态的光诱导电子转移过程的速率。为了确定拟议结构的最小能量,我们使用蒙特卡罗计算(Amber,Macromodel v.8.1)进行了分子建模研究。通过核磁共振光谱对这些化合物进行了全面鉴定,并阐明了其中一些大环的固态结构。为了研究 π-π 堆叠对大环光学性质的影响,还进行了光物理研究。