标题：Synthesis and photophysical properties of a single bond linked tetracene dimer
作者：Sun, Tingting; Shen, Li; Liu, Heyuan; Sun, Xuan; Li, Xiyou
作者机构：[Sun, Tingting; Sun, Xuan; Li, Xiyou] Shandong Univ, Dept Chem, Jinan 250100, Peoples R China.; [Shen, Li; Liu, Heyuan; Li, Xiyou] China Univ Petr E 更多
通讯作者地址：[Sun, X]Shandong Univ, Dept Chem, Jinan 250100, Peoples R China;[Li, XY]China Univ Petr East China, Coll Sci, Dept Chem, Qingdao 266580, Peoples R Chi 更多
来源：JOURNAL OF MOLECULAR STRUCTURE
关键词：Tetracene; Dimer; Orthogonal configuration; Charge transfer; Singlet; fission
摘要：A tetracene dimer linked directly by a single bond has been successfully prepared by using electron withdrawing groups to improve the stability. The molecular structure of this dimer is characterized by H-1 NMR, MALDI-TOF mass spectroscopy, and elemental analysis. The minimized molecular structure and Xray crystallography reveal that the tetracene subunits of this dimer adopt an orthogonal. configuration. Its absorption spectrum differs significantly from that of its monomeric counterpart, suggesting the presence of strong interactions between the two tetracene subunits. The excited state of this dimer is delocalized on both two tetracene subunits, which is significantly different from that of orthogonal anthracene dimers, but similar with that observed for orthogonal pentacene dimer. Most of the excited states of this dimer decay by radioactive channels, which is different from the localized twisted charge transfer state (LTCT) channel of anthracene dimers and the singlet fission (SF) channel of pentacene dimers. The results of this research suggest that similar orthogonal configurations caused different propertied for acene dimers with different conjugation length. (C) 2016 Elsevier B.V. All rights reserved.