Heteroleptic [Cu(P^P)(N^N)][PF6] Complexes: Effects of Isomer Switching from 2,2′-biquinoline to 1,1′-biisoquinoline

The preparation and characterization of [Cu(POP)(biq)][PF6] [Cu(xantphos)(biq)][PF6] are reported (biq = 1,1′-biisoquinoline, POP bis(2-(diphenylphosphanyl)phenyl)ether, xantphos (9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphane). single crystal structure 0.5Et2O was determined compared to that in three salts [Cu(POP)(bq)]+ which bq 2,2′-biquinoline. P–C–P angle is 114.456(19)o [Cu(POP)(biq)]+ a range 118.29(3)–119.60(3)o [Cu(POP)(bq)]+. There change from an intra-POP PPh2-phenyl/(C6H4)2O-arene π-stacking contact between the ligands In solution at ambient temperatures, [Cu(POP)(biq)][PF6]+ [Cu(xantphos)(biq)]+ cations undergo several concurrent dynamic processes, as evidenced their multinuclear NMR spectra. photophysical electrochemical behaviors heteroleptic copper (I) complexes were investigated, effects changing biq described. Short Cu···O distances within may contribute very low photoluminescent quantum yields.