The
development of supramolecular coordination complexes (SCCs)
with a bright aggregate state or mechanical-stimuli-responsive luminescence
is very significant and challenging. Herein, we report the synthesis
of three different supramolecular platinum(II) metallacycles via coordination-driven
self-assembly of a diplatinum(II) acceptor and organic donors with
a triphenylamine, carbazole, or tetraphenylethylene moiety. The triphenylamine-modified
SCC exhibits aggregation-induced emission enhancement (AIEE) but no
mechanofluorochromism. The carbazole and tetraphenylethylene-based
SCCs exhibit changes in aggregate fluorescence and also exhibit reversible
mechanofluorochromism. This work not only reports three rare metallacycles
with AIEE, aggregate fluorescence change, or mechanofluorochromic
nature but also explores their potential applications in cell imaging
and solid-state lighting.
A novel fluorescent sensor BTAE-PA containing two tetrarylethylene (TAE) units, linked through a pyrimidine-2-amine was prepared, and its optical properties were systematically studied. BTAE-PA exhibited a typical aggregation-induced emission enhancement...
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