Regulation of π-Stacked Anthracene Arrangement for Fluorescence Modulation of Organic Solid from Monomer to Excited Oligomer Emission
作者:Tomoaki Hinoue、Yuta Shigenoi、Misa Sugino、Yuji Mizobe、Ichiro Hisaki、Mikiji Miyata、Norimitsu Tohnai
DOI:10.1002/chem.201103518
日期:2012.4.10
arrangements over the usual edge‐to‐face herringbone arrangement. Indeed, as the alkyl substituents were lengthened, the organic salts altered their anthracene arrangement to give two‐dimensional (2D) edge‐to‐face and end‐to‐face herringbone arrangements, one‐dimensional (1D) face‐to‐face zigzag and slipped stacking arrangements, a lateral 1D face‐to‐face arrangement like part of a brick wall, and a discrete
晶体状态的蒽荧光团的面对面π堆叠排列的构造和精确控制,由于空前的激发低聚物形成,导致荧光光谱出现明显的红移。通过使用包括蒽-1,5-二磺酸(1,5-ADS)和多种脂族胺在内的有机盐对安排进行调节。由于边缘位置的氢原子数量较少,并且磺酸盐基团具有空间效应,因此,1,5-ADS应该首选面对面π堆叠排列,而不是通常的面对面人字形排列。的确,随着烷基取代基的延长,有机盐会改变其蒽的排列方式,从而产生二维(2D)的人脸和人脸二维人字形排列,一维(1D)面对面的锯齿形和滑移式堆叠布置,横向一维面对面的布置(如砖墙的一部分)和离散的单体布置。即使在密排固态下,单体排列也可以作为稀溶液,发出深蓝色的光。一维面对面的锯齿形和蒽荧光团的滑动堆积相对于离散排列导致荧光发射发生30-40 nm的红移,这可能是由于基态缔合所致。另一方面,二维端面堆叠引起了更大的60 nm红移,这归因于准分子荧光。令人惊讶的是,砖块状的侧面面对面排列提供了150