H-bonding dependent phosphorescence in a mixed ligand copper(I) complex
2018
Abstract The mixed ligand copper(I) derivative [Cu(PPh 3 ) 2 (κ 2 -O,O″-lact)] ( 1 ) (lact = l -(+)-lactate) has been prepared and fully characterized. NMR studies indicated the occurrence of a fluxional behavior involving the lactate anion, in solution. The α-hydroxycarboxylate ligand is responsible for the generation of a catemeric O–H⋯O(CO) H-bonding network that strongly influences the photophysical properties of 1 , in the solid state. Indeed, when irradiated with UV light the title compound shows a bright phosphorescence, which as suggested by DFT calculations is strictly related to the abovementioned H-bonding network.
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