Five new binuclear lanthanide compounds [Ln(2,4-DClBA)3phen]2(Ln = Pr(1), Eu(2), Tb(3), Ho(4) and Er(5); 2,4-DClBA = 2,4-dichlorobenzoate; phen = 1,10-phenanthroline) have been synthesized and structurally characterized by X-ray crystallography. And all of them were carefully investigated by elemental analysis, molar conductance, IR, UV and TG/DSC-FTIR technology. Single-crystal X-ray diffraction studies revealed that compounds 1–5 were binuclear molecules with an inversion center and the Ln3+ ions contained two kinds of coordination environment that was a distorted monocapped square-antiprism in the compounds 1–2, and a distorted square-antiprism geometry in the compounds 3–5. The 3D surface graphs for the FTIR spectra of gaseous products for the compounds 1–5 were recorded using simultaneous TG/DSC-FTIR technique which is intended to further analysis of the thermal decomposition processes. Hence the gaseous products were identified by the solved single IR spectra obtained at different temperatures from the 3D surface graphs. Furthermore, the Eu(Ш) and Tb(Ш) ternary compounds exhibited intense luminescence under the radiation of UV light. And the results for antimicrobial test show that these compounds exhibit good bacteriostatic activity against Staphylococcus aureus, and better antimicrobial activity against Escherichia coli and Candida albicans.
LIU JingYuREN NingZHANG JianJunZHANG CunYingSONG HuiHua
A ternary solid complex of Samarium chloride hexahydrate with m-methoxybenzoic acid and 1,10-phenanthroline,[S...
XIAO Sheng-Xiong~1 LIU Mei-Yan~2 ZHANG Jian-Jun~(*3) LI Xu~1 LIU Yi-Ting~1 XIAO Hua~1 (1 Department of Chemistry and Life Science,Xiangnan University,Chenzhou,Hunan,423000 China) (2 College of Chemistry and Chemical Engineering,Hunan Normal University,Chansha,Hunan 410081 China) (3 Experimental Center,Hebei Normal University,Shijiazhuang,Hebei,050016 China)
The title complexes [Dy(p-NBA)3Phen]2·3H2O(I) and [Dy(m-NBA)3Phen]2·4H2O(Ⅱ) were synthesized, in the two molecular formulas of which NBA is nitrobenzoate and Phen is 1,10-phenanthroline. The characterizations of the complexes were carried out by means of elemental analysis, UV, IR, XRD and molar conductivity. The thermal decomposition of the two complexes were studied under the non-isothermal condition by DSC, TG-DTG and IR methods in detail. The kinetic parameters of the dehydration process were also obtained by the analysis of DSC curves of the two complexes with Popescu and Vyazovkin methods, respectively,
Some binuclear lanthanide complexes with the general formula[Ln(2,3-DClBA)bipy](Ln= Sm(1),Eu(2),Tb(3),Dy(4) an...
Jun-Ru Zheng~a,Jing-Yu Liu~a,Shu-Jing Sun~(a,b),Jian-Jun Zhang~(a*) a Experimental Center,Hebei Normal University,Shijiazhuang 050016 P.R.China. b Laiyang Normal School of Shandong,Laiyang 265200 P.R.China
A series of lanthanide complexes [Ln(4-Cl-2-MOBA)3phen]2(Ln=Sm(1), Nd(2), Ho(3), Eu(4), Dy(5), and Tb(6); 4-Cl-2-MOBA=4-chloro-2-methoxybenzoate, phen=1,10-phenanthroline) were synthesized and characterized. The single-crystal X-ray diffraction demonstrates that 1–3 are isomorphous, which present dimeric structures with four 4-Cl-2-MOBA anions function as bridging ligands. Complexes 1 and 4–6 display their characteristic luminescence emission bands of central Ln3?ions. The heat capacities, the thermodynamic functions and the thermogravimetry–Fourier transform infrared spectra of gaseous products of complexes 1–6 were investigated.Their non-isothermal kinetics of the second decomposition stage was studied by the integral isoconversional non-linear method and Stark method. Furthermore, 1–6 exhibited excellent antibacterial activity against Candida albicans,Escherichia coli and Staphylococcus aureu.
Ying-Ying ZhangShu-Xia RenJian-Jun ZhangNing RenShu-Ping Wang
