The synthesis, structure, and characterization of three novel 1D nitrogen-heterocyclic copper(I)-diphosphine polymers

At ambient temperature, three 1D nitrogen-heterocyclic Cu(I)-diphosphine polymers, {[Cu2(dppm)2(BF4)2(pyz)](CH2Cl2)2}n (1), {[Cu2(dppm)2(4,4′-bpy)(CF3SO3)](CF3SO3)(CH3OH)}n (2), {[Cu2(dppe)2 (phen)2](ClO4)2(CH2Cl2)}n (3) (dppm = bis(diphenylphosphino)methane, dppe = bis(diphenylphosphino)ethane, pyz = pyrazine, 4,4′-bpy = 4,4′-bipyridine, phen = 1,10-phenanthroline) have been synthesized and characterized by X-ray crystallography, luminescence, IR, 1H, and 31P NMR. Structure analysis shows that 1 is a 1D linear polymer, 2 is a 1D stair-shaped polymer, and 3 is a 1D W-shaped polymer. A photoluminescent study of them shows that they exhibit fluorescent emission bands at ca. 555 nm, 535 nm and 557 nm, respectively.

Graphical abstractThree 1D nitrogen-heterocyclic copper(I) diphosphine polymers were synthesized. And interestingly, one is in linear form, one is in stair-shaped form, while another is in W-shaped form.Figure optionsDownload full-size imageDownload as PowerPoint slide