Uranium(vi) complexes with isonicotinic acid: from monomer to 2D polymer with unique U–N bonding. Issue 42 (8th April 2015)

• Record Type: Journal Article
• Authors: Zhang, Yingjie; Karatchevtseva, Inna; Price, Jason R.; Aharonovich, Igor; Kadi, Fatima; Lumpkin, Gregory R.; Li, Feng
• Is Part Of: RSC advances. Volume 5:Issue 42(2015)
• Page Start: 33249
• Page End: 33253
• Publication Date: 2015-04-08
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra01272d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Two uranium(vi ) complexes with isonicotinic acid, exhibiting a monomer and a 2D polymer, have been synthesized and characterized. Abstract : Two new uranium(vi ) complexes with isonicotinic acid (HINT) have been synthesized and characterized. [(UO2 )(NO3 )2 (HINT)2 ] (1 ) has a monomeric structure constructed of a hexagonal bipyramidal uranyl centre, two nitrate anions and two monodentate HINT in trans -positions. [(UO2 )(OH)(INT)] (2 ) has a two-dimensional (2D) polymeric structure constructed of uranyl hydroxyl 1D pillars and μ3 -bridging INT anions; the first observation of INT in μ3 -bridging mode for U(vi ) ion via U–N bonding. Thermal analysis confirmed both complexes lost coordinated INT ligands followed by further decomposition to form U3 O8 . Raman spectroscopy has confirmed the presence of uranyl ion and INT ligand in both complexes as well as the existence of nitrate vibrations in 1 and hydroxyl vibrations in 2 . Their photoluminescence properties have been investigated.