Adaptive Coordination-Driven Supramolecular Syntheses toward New Polymetallic Cu(I) Luminescent Assemblies

A thermally
activated delayed fluorescence (TADF) tetrametallic
Cu­(I) metallacycle A behaves as a conformationally adaptive
preorganized precursor to afford, through straightforward and rational
coordination-driven supramolecular processes, a variety of room-temperature
solid-state luminescent polymetallic assemblies. Reacting various
cyano-based building blocks with A, a homometallic Cu­(I)
1D-helical coordination polymer C and Cu8M
discrete circular heterobimetallic assemblies DM (M = Ni, Pd, Pt) are obtained. Their luminescence
behaviors are studied, revealing notably the crucial impact of the
spin–orbit coupling offered by the central M metal center on
the photophysical properties of the heterobimetallic DM derivatives.