First donor–acceptor interaction promoted gelation of organic fluids
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Uday Maitra, P. Vijay Kumar, Nividh Chandra, Lawrence J. D’Souza, M. D. Prasanna and A. R. Raju
Abstract
Bile acid derivatives functionalized at the 3-position with an aromatic group formed gels in organic solvents in the presence of trinitrofluorenone.
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The downfield shift of the C-H signals upon formation of the gel is not
clear to us at this time. We feel that a parallel orientation of the donor-acceptor
pair (D:A) in solution may get tilted (and elongated as
D:A:D:A…) upon gel formation, resulting in downfield shifts.
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