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Diphenylene-Tetracyanoquinodimethane Cocrystals as Stable Organic Rectifiers
Rui Li1, Jinfeng Li1, Yajing Sun1
1Tianjin Key Laboratory of Molecular Optoelectronic Science Department of Chemistry School of Science, Tianjin University Collaborative Innovation Canter of Chemical Science and Engineering (Tianjin), Tianjin, 300072, P. R. China.
Abstract:
A promising cocrystal material that acts as a rectifier was prepared by a simple procedure of solution volatilization. (E)-1,2-diphenylethene (STB) and 7,7',8,8'-tetracyanoquinodimethane (TCNQ) were used as donor and acceptor respectively, and aggregate in an ordered fashion in the stilbene-tetracyanoquinodimethane (STC) cocrystal that comprises 1 : 1 donor/acceptor mixed-stacked charge-transfer (CT) complexes. The strong CT interaction between the donor and acceptor is the main driving force for the self-assembly. The cocrystals show rectifying characteristics with a rectification ratio of 26. This result suggests that cocrystal engineering provides a great possibility to obtain rectifying materials from small, readily available organic molecules.
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