Effect of the Spacer Chain Length of Organic Dicarboxylic Acid on the Supramolecular Assembly of Two Ternary Zinc (II) Coordination Polymers Derived from Mixed Ligands

• Published in: Zeitschrift für anorganische und allgemeine Chemie (1950) 2019-08, Vol.645 (16), p.1015-1021
• Main Authors: Nie, Lei, Song, Zi‐Wei, Liu, Dong, Cui, Guang‐Hua
• Format: Article
• Language: English
• Subjects: Bis(benzimidazole); Catalysis; Catalysts; Chemical bonds; Coordination polymers; Dicarboxylic acids; Fluorescence; Hydrogen bonding; Hydrothermal crystal growth; Infrared analysis; Light irradiation; Methylene blue; Photocatalytic activity; Photodegradation; Query languages; Succinic acid; Supramolecular interaction; Ultraviolet radiation; Zinc; Zinc coordination
• ISSN: 0044-2313; 1521-3749
• DOI: 10.1002/zaac.201900100

Two new ZnII coordination polymers (CPs), [Zn2(SA)2(L)2]n (1) and [Zn(AA)(L)]n (2) [L = 1,6‐bis(benzimidazol‐1‐yl)hexane, H2SA = succinic acid, H2AA = adipic acid], were synthesized via hydrothermal method and characterized by elemental analysis, infrared spectroscopy, and single‐crystal X‐ray diffraction. CP 1 possesses a sql network, which is further extended into a 3D supramolecular skeleton by non‐classical C–H···O hydrogen bonding interactions. CP 2 exhibits a 1D linear chain, which is further assembled into a 2D supramolecular layer by π···π stacking interactions. The solid state fluorescence properties of two ZnII CPs were investigated. Both CPs present high photocatalytic activities for the degradation of methylene blue (MB) under UV light irradiation. The photodegradation efficiency using CP 1 as catalyst is 91.3 % and using CP 2 as catalyst is 85.0 %, respectively.