摘要:
A novel smart metal-organic gel (MOG) formed from biscarboxyl-functionalized benzimidazole derivative (D11) in the presence of lead nitrate has been investigated. The critical gel concentration for the formation of MOG was just 0.36 wt%, which exhibits a super gelation capability of D11. The coordination of the metal to the ligand D11 was found to play a vital role in the construction of the supramolecular MOG. Microstructures determined by SEM observation demonstrated that the MOG was formed by intertwined fibrils. Interestingly, the MOG exhibits pH-induced, thermo-induced, and chemical-induced reversible gel-sol transition. Meanwhile, this supramolecular MOG shows desirable absorption ability of methyl orange dye molecules in aqueous solution. (C) 2013 You-Ming Zhang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.