Sensing and photocatalytic properties of two zinc(II) coordination polymers containing bis(benzimidazole) ligands

• Published in: Polyhedron Vol. 203; p. 115237
• Main Authors: Cao, Qing-Lin, Yu, Qiang, Han, Chao, Dong, Gui-Ying, Fu, Lianshe
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.07.2021
• Subjects: Coordination polymer; Luminescent quenching; Photocatalytic property; Pimelic acid; Zinc(II); Pimelic acid; Luminescent quenching; Coordination polymer; Photocatalytic property; Zinc(II)
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2021.115237

Two Zn(II) coordination polymers (CPs), {[Zn(L1)(PA)].H2O}n (1) and [Zn(L2)(PA)]n (2) were hydrothermally synthesized. 1 and 2 exhibit promising photocatalytic activity toward the degradation of methyl violet (MV) under UV irradiation. 1 and 2 can selectively detect acetylacetone (acac)/Fe3+, and acac/MnO4− ions respectively, via the luminescence quenching process. [Display omitted] •Two new coordination polymers were synthesized and characterized.•1 and 2 reveal high catalytic activity for degrading methyl violet (MV).•1 and 2 exhibit highly sensitive and selective sensing for acac.•1 could be an efficient probe for sensing Fe3+ ions.•2 could be an efficient probe for sensing MnO4− ions. Two new ternary Zn(II) coordination polymers, namely {[Zn(L1)(PA)].H2O}n (1) and [Zn(L2)(PA)]n (2) (L1 = 1,3-bis(benzimidazol-1-ylmethyl)benzene, L2 = 1,4-bis(benzimidazol-1-ylmethyl)benzene, H2PA = pimelic acid), were hydrothermally synthesized and characterized. 1 shows a 1D ladder-like chain and can further form 2D supramolecular framework by π − π stacking interactions, while 2 exhibits a 2D (6,3) layer. 1 and 2 show excellent photocatalytic performance for the degradation of methyl violet under UV irradiation, the degradation efficiencies of 1 and 2 can reach 98.5% and 94.8% after 150 min, respectively. Furthermore, 1 and 2 can selectively detect acetylacetone (acac)/Fe3+ and acac/MnO4− ions, separately, via the luminescence quenching process.