Preparation, Structure, Fluorescence and Tddft calculation of a Zinc Biimidazole Complex

Abstract

The complex [Zn(2,2'-biimidazole) 2 H 2 O] 4 (SO 4 )4·12H 2 O has been synthesised by solvothermal reaction and structurally characterised by single crystal X-ray diffraction. The zinc ion coordinates to four nitrogen atoms and one oxygen atom to yield a slightly distorted square pyramid. The [Zn(2,2'-biimidazole)2H 2 O] 2+ cations and SO 4 2anions link to each other by hydrogenbonding interactions to complete a three-dimensional supramolecular framework. The complex exhibits an emission in the blue region and theoretical investigation reveals that the emission mainly originates from ligand-to-ligand charge transfer, accompanied some ligand-to-metal charge transfer.

Diimidazolium Halobismuthates [Dim]2[Bi2X10] (X = Cl–, Br–, or I–): A New Class of Thermochromic and Photoluminescent Materials

“…Moreover, aromatic stacking can also occur as a secondary attractive interaction (i.e., imidazolium cations are electron-poor rings, so the interaction between the π-electrons is usually weak) . Additionally, 2,2′-biimidazole (C 6 H 6 N 4 ) has also proven to be a very useful building unit in the construction of new coordination compounds because of the presence of four nitrogen atoms that allow coordination to different metal centers. − Some of them show interesting optical properties such as photoluminescence and fluorescence. , …”

A novel samarium complex with interesting photoluminescence and semiconductive properties

“…Comparing with the neutral 4,4'-bipy, 4,4'-Hbipy cation is easier to form supramolecular frameworks through H-bonding. Our recent efforts in synthesizing novel complex have focused largely on the systems containing bifunctional molecule like 4,4′-bipy [13][14][15][16][17][18][19].…”