electron-donating group is covalently attached. In this work, we probe the nature of the excited state in a series of cofacially arrayed polyfluorene derivatives with electron-rich aromatic donor attached via a methylene linker. Our studies show that in all cases excimer formation is energetically favorable, and promotion of a charge-transfer state in such systems is possible but requires a free energy for electron
众所周知,在电子激发下,各种π堆积的二聚体容易表现出受激准分子的形成,这是由于生色团之间的完美的三明治状排列所致。然而,不清楚的是,如果强的供电子基团共价连接,那么这种二聚体是否也能够在激发时转移电子。在这项工作中,我们探讨了一系列通过亚甲基接头连接的富含电子富集芳族供体的表面排列的聚
芴衍
生物的激发态性质。我们的研究表明,在所有情况下,准分子的形成在能量上都是有利的,并且在此类系统中可能促进电荷转移状态,但电子转移所需的自由能远远超过1V。