Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (5): 582-589.DOI: 10.11944/j.issn.1000-0518.2017.05.160296

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Microcalorimetric Study of Micrococcus Luteus Inhibition by Rare Earth Complexes with Carboxylate Ligand

CEN Peipeia,HE Yanpingb,LI Feifeia,CAO Lianga,CHEN Xiaoyana,SONG Weiminga*()   

  1. aSchool of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China
    bDrug Manufacturing Center,General Hospital of Ningxia Medical University,Yinchuan 750004,China
  • Received:2016-07-15 Accepted:2016-10-12 Online:2017-05-02 Published:2017-05-02
  • Contact: SONG Weiming
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21463020), Natural Science Foundation of Ningxia Province(No.NZ16035), Foundation for Fostering Outstanding Young Teachers of Ningxia Higher Education Institutions of China(No.NGY2016063), the Science Research Projects of Ningxia Higher Education Institutions of China(Grant Nos.NGY2015026)

Abstract:

Four isostructural rare earth complexes, namely [Re2(oba)3(H2O)5]·H2O[Re=La(1), Ce(2), Sm(3), Er(4), H2oba=4,4'-oxybisbenzoic acid], have been synthesized under solvothermal conditions and characterized by elemental analysis, infrared(IR) spectrometry, and powder X-ray diffraction. Thermogravimetric analysis demonstrates that these complexes possess good thermostability. Micrococcus luteus inhibition by these complexes have been real-time detected by means of microcalorimetry. The growth rate constant k, maximum power Pmax, passage time tG and inhibitive ratio I, respectively, have been obtained. Experimental results indicate that the title complexes present effective inhibition on Micrococcus luteus, and the order is listed as follows:[Er2(oba)3(H2O)5]·H2O(4)>[Sm2(oba)3(H2O)5]·H2O(3)>[Ce2(oba)3(H2O)5]·H2O(2)>[La2(oba)3(H2O)5]·H2O(1).

Key words: rare earth carboxylic complexes, microcalorimetry, Micrococcus luteus, thermodynamics