Synthesis, Spectroscopy and Antibacterial Activity of Supermolecular Compounds of Organotitanium Substituted Heteropolytungstates Containing 8-Quinolinol
FENG Chang-gen1, XIONG Yu-di1, LIU Xia2
1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China 2. College of Science, China Agricultural University, Beijing 100193, China
Synthesis, Spectroscopy and Antibacterial Activity of Supermolecular Compounds of Organotitanium Substituted Heteropolytungstates Containing 8-Quinolinol
FENG Chang-gen1, XIONG Yu-di1, LIU Xia2
1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China 2. College of Science, China Agricultural University, Beijing 100193, China
摘要: Parent compounds of cyclopentadienyltitanium substituted heteropolytungstates with Keggin structure, An[(CpTi)XW11O39]·xH2O (A=Me4N, K; X=P, Si, Co; Cp=η5-C5H5) were synthesized in aqueous phase. By allowing parent heteropoly compounds to react with protonated 8-quinolinol, the title supermolecular compounds (C9H8NO)mAn[(CpTi)XW11O39]·xH2O (A=Me4N, H; X=P, Si, Co) were synthesized. The title compounds were characterized by means of elementary analysis, IR, UV, 1H NMR, XRD and TG-DSC. The results indicate that the title compounds are new heteropoly compounds, and there is a charge transfer interaction between the organic cation and heteropoly anion. The results obtained from thermal analysis show that QCpTiPW, QCpTiSiW and QCpTiCoW begin to decompose at 212.4, 194.2 and 171.2 ℃, respectively. The results obtained from antibacterial test reveal that QCpTiSiW has the best antibacterial activity, and the MIC values of QCpTiSiW against Escherichia coli and Staphylococcus aurous are 64.0 and 0.500 μg·mL-1, respectively.
Abstract:Parent compounds of cyclopentadienyltitanium substituted heteropolytungstates with Keggin structure, An[(CpTi)XW11O39]·xH2O (A=Me4N, K; X=P, Si, Co; Cp=η5-C5H5) were synthesized in aqueous phase. By allowing parent heteropoly compounds to react with protonated 8-quinolinol, the title supermolecular compounds (C9H8NO)mAn[(CpTi)XW11O39]·xH2O (A=Me4N, H; X=P, Si, Co) were synthesized. The title compounds were characterized by means of elementary analysis, IR, UV, 1H NMR, XRD and TG-DSC. The results indicate that the title compounds are new heteropoly compounds, and there is a charge transfer interaction between the organic cation and heteropoly anion. The results obtained from thermal analysis show that QCpTiPW, QCpTiSiW and QCpTiCoW begin to decompose at 212.4, 194.2 and 171.2 ℃, respectively. The results obtained from antibacterial test reveal that QCpTiSiW has the best antibacterial activity, and the MIC values of QCpTiSiW against Escherichia coli and Staphylococcus aurous are 64.0 and 0.500 μg·mL-1, respectively.
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