Syntheses, structures, and luminescence properties of five new coordination polymers based on 3-carboxy-1-(3′-carboxybenzyl)-2-oxidopyridinium and neutral ligands. Issue 38 (13th September 2022)

• Record Type: Journal Article
• Authors: He, Yuan-Chun; Wu, Shuang; Zhang, Jie; Qin, Wen-Hui; Liu, Jing; Zhao, Fang-Hua; Liu, Lin; Jing, Zhihong
• Is Part Of: CrystEngComm. Volume 24:Issue 38(2022)
• Page Start: 6715
• Page End: 6723
• Publication Date: 2022-09-13
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/d2ce00921h
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Five CPs have been synthesized by a new semi-rigid dicarboxyl ligand and neutral ligands under hydrothermal conditions, and their luminescent sensing experiments for different small molecules/ions were studied in detail. Abstract : A series of coordination polymers, namely [Zn(μ3 -L)(H2 O)2 ] (1 ), [Zn(μ2 -L)(2, 2′-bpy)(H2 O)] (2 ), [Zn(μ3 -L)(μ2 -4, 4′-bpy)0.5 ] (3 ), [Cd(μ3 -L)(2, 2′-bpy)] (4 ), and [Cd(μ2 -L)(phen)(H2 O)] (5 ) (H2 L = 3-carboxy-1-(3′-carboxybenzyl)-2-oxidopyridinium, 2, 2′-bpy = 2, 2′-bipyridine, 4, 4′-bpy = 4, 4′-bipyridine, phen = 1, 10-phenanthroline), have been synthesized under hydrothermal conditions. These coordination polymers have been characterized by single-crystal X-ray diffraction, elemental analyses, infrared spectroscopy, thermogravimetric analyses and powder X-ray diffraction. The structure analysis by single crystal X-ray diffraction reveals that compound 1 shows a 1D double chain which can be expanded to a 2D supramolecular architecture through intermolecular π–π stacking interactions. In compound 2, the 1D wave-like chains are extended to a 3D supramolecular framework by intermolecular hydrogen bonds and π–π stacking interactions. In compound 3, the infinite rod-like metal ion chains are linked with L 2− anions and 4, 4′-bpy to form a 3D framework. In compound 4, the adjacent 1D loop-like chains are interconnected to a 3D supramolecular framework by intermolecular hydrogen bonds and π–π stacking interactions. Compound 5 displays a 3D supramolecular architecture extended from the 1D zigzag chains by intermolecular hydrogen bonds and π–π stacking interactions. The result reveals that the organic ligand plays a key role in the self-assembly of coordination polymers. The luminescence sensing experiments reveal that compounds 1–5 can effectively detect Fe 3+, Cr2 O7 2−, and NB. In particular, compound 1 shows a high quenching constant and a low limit of detection for Fe 3+ .