3D and 2D supramolecular assemblies and thermotropic behaviour of a carbo-benzenic mesogen

Chongwei Zhu; Tsai-Hui Wang; Chien-Jhang Su; Shern-Long Lee; Arnaud Rives; Carine Duhayon; Brice Kauffmann; Valérie Maraval; Chun-hsien Chen; Hsiu-Fu Hsu; Remi Chauvin

doi:10.1039/C7CC02430D

3D and 2D supramolecular assemblies and thermotropic behaviour of a carbo-benzenic mesogen†

Chongwei Zhu,^ab Tsai-Hui Wang,^c Chien-Jhang Su,^c Shern-Long Lee,^d Arnaud Rives,^ab Carine Duhayon,

^ab Brice Kauffmann,

^e Valérie Maraval,*^ab Chun-hsien Chen,

*^d Hsiu-Fu Hsu*^c and Remi Chauvin

*^ab

Author affiliations

* Corresponding authors

^a CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP44099, 31077 Toulouse Cedex 4, France

^b Université de Toulouse, UPS, ICT-FR 2599, 31062 Toulouse Cedex 9, France
E-mail: valerie.maraval@lcc-toulouse.fr, chauvin@lcc-toulouse.fr

^c Department of Chemistry, Tamkang University, 251 Taipei, Taiwan
E-mail: hhsu@mail.tku.edu.tw

^d Department of Chemistry and Center for Emerging Material and Advanced Devices, National Taiwan University, 106 Taipei, Taiwan
E-mail: chhchen@ntu.edu.tw

^e Université de Bordeaux, CNRS, INSERM, UMS3033/US001, Institut Européen de Chimie et Biologie, F-33607 Pessac, France

Abstract

Hexaalkoxy-di(phenylethynyl)-tetraphenyl-carbo-benzenes bearing six C_nH_2n+1 aliphatic chains (n = 12, 18) have been synthesized and characterized, including by single crystal XRD analysis. For n = 12, a liquid crystal behaviour was observed in the range of 109–130 °C. DSC, POM and PXRD analyses evidenced a rectangular columnar mesophase at 115 °C. The determined 3D lattice constants are consistent with 2D STM images of the so-called “carbo-mesogen” deposited on an HOPG surface.

Chemical Communications

3D and 2D supramolecular assemblies and thermotropic behaviour of a carbo-benzenic mesogen†

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3D and 2D supramolecular assemblies and thermotropic behaviour of a carbo-benzenic mesogen

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