Abstract
Abstract We have successfully fabricated a series of polymer–metal complex [{Cu2(µ-Br)2(PPh3)2}(µ-PyX)]n nanocrystals (NCs) with different kinds of ligands. Interestingly, the luminescence spectrum of the NCs of [{Cu2(µ-Br)2(PPh3)2}(µ-PyX)]n were red-shifted, compared with those of their corresponding bulk crystals. IR spectra of [{Cu2(µ-Br)2(PPh3)2}(µ-Py2)]n, whose ligand had a phenyl linker between two pyridine rings, revealed that the conformation of the coordinated Py2 ligand in the NCs was different from that in the bulk crystal, but similar to that of the un-coordinated Py2 ligand. The results suggest that the rotational degree of freedom in the PyX ligands would affect the looseness of the crystal lattice in the polymer–metal complex NCs, thereby affecting their luminescence properties.
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