Four coordination compounds constructed from 1, 10-phenanthroline and semi-flexible and flexible carboxylic acids: Hydrothermal synthesis, optical properties and photocatalytic performance. (18th April 2015)

• Record Type: Journal Article
• Authors: Wang, Chong-Chen; Zhang, Yan-Qiu; Zhu, Tian; Zhang, Xiao-Ying; Wang, Peng; Gao, Shi-Jie
• Is Part Of: Polyhedron. Volume 90(2015)
• Page Start: 58
• Page End: 68
• Publication Date: 2015-04-18
• Subjects: Coordination compounds -- Optical energy gap -- Photocatalysis -- Degradation -- Organic dye; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2015.01.042
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: A high efficient metal–organic framework (MOF) photocatalyst was introduced to decompose typical organic pollutants, in which the terminology of HOMO–LUMO gap is suggested to describe the discrete character of the light-induced transitions in the MOF. Highlights: Four novel coordination compounds are constructed from 1, 10-phenanthroline and semi-flexible or flexible carboxylic acids. The title compounds show good photocatalytic efficiency on the degradation of MB and MO. The photocatalytic activities and a possible degradation mechanism of the title compounds have been proposed. Abstract: Four novel coordination compounds based on d 10 metals, 1, 10-phenanthroline (phen) and 2, 2′, 3, 3′-oxydiphthalic acid (2, 2′, 3, 3′-odpt), 3, 5-di(3, 4-dicarboxylphenyloxy)benzoic acid (dcpb) or 1, 3-(3′, 4′-carboxylphenoxy)benzene (cpb), namely [Co2 (phen)4 (2, 2′, 3, 3′-H2 odpt)2 ]·14H2 O (1 ), [Co2 (phen)4 (H4 dcpb)2 ]·14H2 O (2 ), [Cu(phen)(H3 dcpb)] (3 ) and [Mn(phen)2 (H2 cpb)] (4 ), have been synthesized under hydrothermal conditions and characterized by the methods of single crystal X-ray diffraction, FTIR, elemental analysis and UV–Vis diffuse spectroscopy. The isostructural compounds1 and2 consist of discrete neutral [Co2 (phen)4 (L)2 ] (L = 2, 2′, 3, 3′-odpt for1 and dcpb for2 ) units and lattice water molecules, forming 3D frameworks with the aid of rich hydrogen bonding interactions. Compounds3 is built up of discrete neutral [Cu(phen)(H3 dcpb)] units to construct a 3D framework via π–π stacking interactions. Compound4 consists of 1D neutral [Mn(phen)2 (H2 cpb)] helix chains, further forming a 3D framework via rich hydrogen bonding interactions. The photocatalytic activities of degradation of methylene blue (MB) and methyl orange (MO) in compounds1 –4 under UV light irradiation were determined, and the results revealed that compound4 can decompose MB and MO efficiently. The different degradation efficiencies of compounds1 –4 implied that the HOMO–LUMO gap should be utilized to describe the discrete character of the light-induced transitions in the coordination compounds.