Subtle structure and fluorescence signal changes of four Hg-containing complexes: Influence of the solvents and the halide ions

摘要: Abstract Four Hg(II)-containing complexes based on methylenebis(1,1′-benzimidazole) (mbbz), namely, [HgCl2(mbbz)]n (1), [HgBr2(mbbz)]n (2), [HgI2(mbbz)]n (3) and [HgI2(mbbz)]3 (4) have been synthesized structurally characterized. Single-crystal X-ray diffraction reveals that 1, 2 3 are isostructural exhibiting the 1-D double helical chain structures. After changing solvent media, we obtained a trinuclear cage-like structure 4, which is isomeric with 3. Both experimental results theoretical calculation proved crucial to of complexes. The fluorescence properties four also investigated it apparent intensity decreases as atomic weight increases in order Cl−, Br− I−. subtle signal changes these indicate both solvents halide anions remarkable impact resultant