标题：Synthesis and properties of perylenetetracarboxylic diimide dimers linked at the bay position with conjugated chain of different length
作者：Shi, Y.;Wu, H.;Xue, L.;Li, X.
作者机构：[Shi, Y] Key Lab of Colloid and Interface Chemistry, Ministry of Education of China, Department of Chemistry, Shandong University, Jinan 250100, China 更多
通讯作者地址：[Li, XY]Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ China, Dept Chem, Jinan 250100, Peoples R China.
来源：Journal of Colloid and Interface Science
关键词：Absorption spectrum;Aggregation;Dimer;Fluorescence spectrum;Perylenetetracarboxylic diimide
摘要：Three perylenetetracarboxylic diimide (PDI) dimers linked with a conjugated chain of different lengths have been designed and prepared. The UV-Vis absorption and fluorescence spectra of these three dimers revealed different photophysical properties owing to the different length of the linkage. The intermolecular π- π interactions were found to be enhanced significantly with the increase in the length of the linkage and therefore induced different aggregation behaviors of these molecules. The structure of the molecular aggregates was investigated by X-ray diffraction (XRD), and the morphology of the aggregates was examined by atomic force microscopy (AFM). One. -dimensional fibers were observed for the aggregates of compounds 2 and 3, and thin solid films were observed for the aggregates of compound 1.