Syntheses and characterization of luminescent dinuclear and polynuclear Cu(I) complexes containing 4,4′-bis(diphenylphosphino)biphenylene bridge

Abstract

The dinuclear complex [Cu 2(dpbp) 2(NCMe) 4][BF 4] 2 ( 1) has been prepared by treating [Cu(NCMe) 4][BF 4] with 4,4′-bis(diphenylphosphino)biphenylene (abbreviated as dpbp). Reactions of 1 with 2,2′-bipyridine and 1,1′-bis(diphenylphosphino)ferrocene (abbreviated as dppf) afford [Cu 2(dpbp) 2(2,2′-bipy) 2][BF 4] 2 ( 2) and [Cu 2(dpbp)(dppf) 2][BF 4] 2 ( 3), respectively. In contrast, compound 1 reacts with tetra(2-pyridyl)ethyl-1,4-diaminobutane (abbreviated as tpyda) to produce the polymeric complex {[Cu 2(dpbp)(tpyda)][BF 4] 2} n ( 4). Compounds 1– 4 are photoluminescent with the emission band ( λ max) in the range 510–554 nm. The crystal structures of 1 and 4 have been determined by an X-ray diffraction study.