Synthesis, structures and properties of six lanthanide complexes based on a 2-(2-carboxyphenyl)imidazo(4, 5-f)-(1, 10)phenanthroline ligand. Issue 6 (22nd January 2019)

• Record Type: Journal Article
• Authors: Ren, Shanshan; Jiang, Wei; Wang, Qingwei; Li, Zhimin; Qiao, Yu; Che, Guangbo
• Is Part Of: RSC advances. Volume 9:Issue 6(2019)
• Page Start: 3102
• Page End: 3112
• Publication Date: 2019-01-22
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra09207a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Six lanthanide complexes based on 2-HNCP possess good thermal stabilities, characteristic photoluminescence properties, and photocatalytic activities for organic dyes degradation under visible light irradiation. Abstract : Six lanthanide complexes [Tb(2-NCP)2 (NO3 )] n (1 ), [Eu(2-NCP)2 (3-PYC)] n (2 ), [Sm(2-NCP)2 (3-PYC)] n (3 ), [Eu(2-NCP)(SA)] n (4 ), [Tb(2-NCP)(SA)] n (5 ) and [Tb(2-NCP)(AA)] n (6 ) (2-HNCP = 2-(2-carboxyphenyl)imidazo(4, 5- f )-(1, 10)phenanthroline, 3-HPYC = pyridine-3-carboxylic acid, H2 SA = succinic acid, H2 AA = adipic acid) have been synthesized by hydrothermal route, and the crystal structures were analyzed through elemental analysis, infrared spectroscopy, single crystal X-ray diffraction. Complexes1 and6 present two-dimensional (2D) layers, which are further connected to three-dimensional (3D) supramolecular architectures through C–H⋯π interactions. Complexes2 and3 exhibit infinite one-dimensional chains. Finally, the neighboring chains are packed by C–H⋯π interactions, giving rise to 3D supramolecular network. Complexes4 and5 display 2D layers, which are further extend to 3D supramolecular structures via C–H⋯O intermolecular hydrogen bonding. Six complexes possess good thermal stabilities, characteristic photoluminescence properties, and photocatalytic activities for the degradation of organic dyes under visible light irradiation. In addition, the complex6 exhibits significantly enhanced photocatalytic activity for methylene blue, and the degradation rate could reach 81.2% in 370 min. Meanwhile trapping experiments indicated that the hole, ·O2 − and ·OH are the main activated species. Furthermore, by comparing the photoluminescent and photocatalytic mutation results of same metal complexes induced by interconversion of coligands, we confirm that the properties mutation induced by coligands is much obvious and controllable.