Regulation of π⋯π stacking interactions between triimidazole luminophores and comprehensive emission quenching by coordination to Cu(II)

Abstract

Eight Cu(II) coordination compounds with cyclic triimidazole, triimidazo[1,2-a:1′,2′-c:1′′,2′′-e][1,3,5]-triazine (L1), its positional isomer, triimidazo[1,2-a:1′,2′-c:1′′,5′′-e][1,3,5]-triazine (L2), and two pyridine derivatives of L1, 3-(pyridin-2-yl)triimidazo[1,2-a:1′,2′-c:1′′,2′′-e][1,3,5]triazine (L3) and 3-(pyridin-4-yl)triimidazo[1,2-a:1′,2′-c:1′′,2′′-e][1,3,5]triazine (L4) are reported. All compounds represent neutral Cu(II) discrete complexes or coordination polymers comprising luminophore triimidazole molecules and charge-compensated anions.