Divergent Crystallographic Architecture for Silver‐Flavin Complexes Induced via pH Variation

Abstract

AbstractHerein we report solid state analysis of the silver‐flavin complexes grown under different chemical environments‐neutral (complex 1), acidic (complex 2) and basic (complex 3) mediums. While preferred and frequently reported primary coordination is observed in all three cases; involvement of rare secondary coordination in 2 and deprotonated carboxyl functionality of the modified flavin in 3 for silver ion coordination results in discrete, zig‐zag and ribbon‐like architecture. Crystallographically unique silver ions, anion‐pi/lone pair‐pi interactions and the argentophilic interactions are some of the unique features observed for silver‐flavin complexes. Notably, such extended geometry involving flavin moiety is scarcely reported and these results expand the unexplored coordination horizon of the flavin entities.