ABSTRACT
A new linear bismuth(III) coordination polymer, catena-poly[[chloridobismuth(III)]-µ3-1,10-phenanthroline-2,9-dicarboxylato-κ(6)O(2):O(2),N(1),N(10),O(9):O(9)], [Bi(C14H6N2O4)Cl]n, has been obtained by an ionothermal method and characterized by elemental analysis, energy-dispersive X-ray spectroscopy, IR spectroscopy, thermal stability studies and single-crystal X-ray diffraction. The structure is constructed by Bi(C14H6N2O4)Cl fragments in which each Bi(III) centre is seven-coordinated by one Cl atom, four O atoms and two N atoms. The coordination geometry of the Bi(III) cation is distorted pentagonal-bipyramidal (BiO4N2Cl), with one bridging carboxylate O atom and one Cl atom located in the axial positions. The Bi(C14H6N2O4)Cl fragments are further extended into a one-dimensional linear polymeric structure via subsequent but different centres of symmetry (bridging carboxylate O atoms). Neighbouring linear chains are assembled via weak C-H···O and C-H···Cl hydrogen bonds, forming a three-dimensional supramolecular architecture. Intermolecular π-π stacking interactions are observed, with centroid-to-centroid distances of 3.678â (4)â Å, which further stabilize the structure. In addition, the solid-state fluorescence properties of the title coordination polymer were investigated.
Subject(s)
Bismuth/chemistry , Coordination Complexes/chemical synthesis , Phenanthrolines/chemical synthesis , Polymers/chemistry , Coordination Complexes/chemistry , Crystallography, X-Ray , Fluorescence , Hydrogen Bonding , Molecular StructureABSTRACT
OBJECTIVE: To optimize the extracting condition of fatty constituents from Tabanus bivittatus and analyse by GC-MS. METHODS: Taking fatty yield as index, the extraction technology parameters of fatty constituents of Tabanus bivittatus ere optimized by single factor test and orthogonal test. RESULTS: The optimum extraction parameters were as follows: the ratio of acetone to petroleum ether 1: 2, extraction time 2 h, solid-liquid ratio 1: 50. Twenty-one fatty acids were identified by GC-MS. CONCLUSION: The process is reasonable and with good reproducibility. The main components of fatty acids in Tabanus bivittatus are palmitoleic acid, palmitic acid, linoleic acid, oleic acid and stearic acid.
