Issue 33, 2012
From the journal:

Soft Matter

Key role of solvent type in organogelation

D. Dasgupta,†a   A. Thierry,a   C. Rochas,c   A. Ajayaghoshb  and  J. M. Guenet*a  

* Corresponding authors

a Institut Charles Sadron, CNRS UPR22-Université de Strasbourg, 23 rue du Loess, BP 84047, F-67034 Strasbourg Cedex 2, France
E-mail: jean-michel.guenet@ics-cnrs.unistra.fr

b National Institute for Interdisciplinary Science and Technology (NIIST), CSIR, Industrial Estate P.O, Pappanamcode, Trivandrum 695019, India

c CERMAV, CNRS UPR5301, BP 53, F-38041 Grenoble Cedex 9, France

Abstract

In this paper we again assess the role played by the solvent type in the organogelation process of photo/electroactive oligo (para-phenylene vinylene) (OPV) molecules . In this aim we have investigated gelation in benzyl alcohol, a polar solvent, and trans-decahydronaphthalene, an apolar solvent. Several techniques have been used: DSC, SEM, AFM, TEM, X-ray diffraction, UV-vis, and fluorometry. We have observed that the gel thermodynamics (T–C phase diagram), morphologies, molecular order, and optical properties differ considerably with the solvent type. The results are discussed by considering the interaction of the solvent with the different moieties of the OPV molecule. The reason why fibrils are obtained instead of 3-D crystals is also considered on the basis of micro-diffraction experiments performed by electron microscopy on finite aggregates.

Graphical abstract: Key role of solvent type in organogelation

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Article information

DOI
https://doi.org/10.1039/C2SM26000J
Article type
Paper
Submitted
28 Apr 2012
Accepted
15 Jun 2012
First published
12 Jul 2012

Soft Matter, 2012,8, 8714-8721

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Key role of solvent type in organogelation

D. Dasgupta, A. Thierry, C. Rochas, A. Ajayaghosh and J. M. Guenet, Soft Matter, 2012, 8, 8714 DOI: 10.1039/C2SM26000J

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