Construction of Zn-II-based rac-Helical Chains Containing Semi-rigid Dipolar Ligand 1,4-Bis(benzimidazol-1-ylmethyl)benzene

摘要

A Zn-II cpmpound based on the semi-rigid dipolar ligand 1,4-bis(benzimidazol-1-ylmethyl)benzene (L), {[Zn(L)(2)Cl-2]center dot 2DMF}(n) (1) has been synthesized successfully under solvothermal conditions. X-ray single crystal diffraction shows that the complex contains P-helical and M-helical chains with 2(1) screw axis but crystallizes as a racemate. Through pi(center dot center dot center dot)pi stacking interactions between two well-overlapping benzimidazoleyl rings from two adjacent chains, the 3D racemic Supramolecular network is assembled. Furthermore, the IR, TGA and luminescent properties are also investigated in this work.