Shi-Jie Gao

Ultra-high uptake and selective adsorption of organic dyes with a novel polyoxomolybdate-based organic–inorganic hybrid compound

A novel organic–inorganic hybrid compound, (4-Hap)4[Mo8O26] (4-ap = 4-aminopyridine) (1), was synthesized via a hydrothermal method, and utilized to conduct adsorptive uptake of typical organic dyes, in which some key parameters of dye adsorption were investigated. The results revealed that compound 1 demonstrated rapid adsorption of methylene blue (MB) with ultra-high efficiency and capacity, as well as achieving rapid and highly selective adsorption of MB from MB/MO (MO = methyl orange) and MB/RhB (RhB = rhodamine B) mixtures.

Three silver complexes constructed from organic carboxylic acid and 1,2-bis(4-pyridyl)ethane ligands: syntheses, crystal structures, and luminescent properties

Three silver-based complexes, namely [Ag2(bpa)2](Brtp)·6H2O (1), [Ag3(bpa)3](Hdcdcpb)·9H2O (2), and [Ag2(bpa)2(oa)]·2H2O (3), were synthesized via the reactions of AgNO3, 1,2-bis(4-pyridyl)ethane (bpa), and 2-bromoterephthalic acid (H2Brtp), 2,3-dicarboxyl-(2′,3′-dicarboxylazophenyl)benzene (H4dcdcpb) or 4,4′-oxybisbenzoic acid (H2oa) in aqueous alcohol/ammonia solution at room temperature. Complexes 1 and 2 consist of 1D infinite cationic [Ag(bpa)]nn+ chains, interspersed with non-coordinated and completely deprotonated Brtp2− or partly deprotonated Hdcdcpb3− anions acting as discrete counter-ions to balance the charge. The lattice water molecules are situated among the framework of the crystal structure and show rich hydrogen-bonding interactions, while the presence of Ag…N and Ag…Ag contacts strengthens the frameworks. Complex 3 consists of 2D neutral [Ag2(bpa)2(oa)] in which the completely deprotonated oa2− units both act as bidentate ligands and as counter-ions. All three complexes exhibit luminescent properties, which can be assigned to ligand-to-metal charge transfer and Ag…Ag interactions.

Three coordination compounds of cobalt with organic carboxylic acids and 1,10-phenanthroline as ligands: syntheses, structures and photocatalytic properties

Abstract Three cobalt-based coordination compounds, [Co2(phen)4(H2qptb)](H3qptb)2 (1), [Co2(phen)4(H2dczpb)2]·5H2O (2) and [Co2(phen)4(H2odpa)2(H2O)2]·2H2O (3), were obtained from mixtures of quaterphenyl-4,2″,5″,4′-tetracarboxylic acid (H4qptb), 3,4-dicarboxyl-(3′,4′-dicarboxylazophenyl) benzene (H2dczpb), 4,4′-oxydiphthalic acid (H2odpa), along with 1,10-phenanthroline (phen) and cobalt salts by hydrothermal synthesis. Single-crystal X-ray diffraction reveals that complexes 1–3 contain [Co2(phen)4(L)] units, further joined into 3D frameworks via hydrogen-bonding interactions. All three complexes display considerable thermal stability and exhibit selective absorption in the ultraviolet region, as shown by thermogravimetric analysis and UV–Vis diffuse reflectance spectroscopy, respectively. Complex 1 mediates efficient photocatalytic degradation of methylene blue under UV irradiation.

CCDC 1042981: Experimental Crystal Structure Determination

Related Article: Xiao-Xu Song, Chong-Chen Wang, Xue-Yan Xu, Huan-Ping Jing, Peng Wang, Shi-Jie Gao|2017|Transition Met.Chem.|42|181|doi:10.1007/s11243-017-0123-2

CCDC 1042968: Experimental Crystal Structure Determination

Related Article: Xiao-Xu Song, Chong-Chen Wang, Xue-Yan Xu, Huan-Ping Jing, Peng Wang, Shi-Jie Gao|2017|Transition Met.Chem.|42|181|doi:10.1007/s11243-017-0123-2