Halide effect in electron rich and deficient discotic phthalocyanines

M Ahmida, R Larocque, MS Ahmed, A Vacaru…

Index: Ahmida, Mohamed; Larocque, Raymond; Ahmed, M. Sharif; Vacaru, Alina; Donnio, Bertrand; Guillon, Daniel; Eichhorn, S. Holger Journal of Materials Chemistry, 2010 , vol. 20, # 7 p. 1292 - 1303

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Citation Number: 10

Abstract

A series of discotic octa-and tetra-alkylthio substituted phthalocyanines containing four Cl, Br, I atoms or twelve fluorine atoms have been prepared. All compounds display columnar mesomorphism as confirmed by polarized optical microscopy, thermal analysis, and variable temperature X-ray diffraction. Phthalocyanines containing halide atoms do not crystallize but form glassy or partially crystalline hexagonal columnar phases. Glass transition ...