Color-Tunable Cyano-Substituted Divinylene Arene Luminogens
as Fluorescent π‑Gelators
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Abstract
The synthesis of three cyano-substituted
divinylene π-gelators
is reported. The modulation of the color is achieved by placing the
cyano groups in appropriate position of the conjugated backbone, thus
modulating the donor–acceptor interaction. Variable-temperature
UV–vis data have been utilized to investigate the self-assembly
of the gelators <b>1</b>–<b>3</b> that is governed
by a cooperative mechanism. A complete set of photophysical parameters
(Φ<sub>F</sub>,τ, <i>k</i><sub>r</sub> and <i>k</i><sub>nr</sub>) demonstrate the role of the molecular aggregation
in enhanced emission upon self-assembly
