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<p>The mixed-ligand complexes <i>cis</i>-[(MoO)<sub>2</sub>O(glyc)<sub>2</sub>(phen)<sub>2</sub>]·5H<sub>2</sub>O (<b>1</b>) and <i>trans-</i>[(MoO)<sub>2</sub>O(glyc)<sub>2</sub>(phen)<sub>2</sub>] (<b>1</b>-5H<sub>2</sub>O) were synthesized under hydrothermal conditions. Cis-structure complex <b>1</b> exhibits reversible transformation to trans-structure complex <b>1</b>-5H<sub>2</sub>O. Structural analysis reveals that the crystal structure of <b>1</b> contains 2D water cluster layers featuring twelve-membered rings. EPR spectroscopic studies demonstrate that the two molybdenum atoms in both <b>1</b> and <b>1</b>-5H<sub>2</sub>O exist as independent paramagnetic centers. Furthermore, solid state <sup>13</sup>C NMR spectra of <b>1</b> and <b>1</b>-5H<sub>2</sub>O reveal large downfield shifts for the coordinated glycolate moieties. Notably, the catalytic performance of <b>1</b> in the degradation of methyl orange is significantly superior to that of <b>1</b>-5H<sub>2</sub>O, which could be attributed to the steric hindrance difference induced by cis-trans isomerism.</p>

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Cis and trans- phenanthroline glycolate oxomolybdenum(V) complexes: Syntheses, spectroscopic characterization, structures and their catalytic degradations of methyl orange

  • 期刊论文

  • 发表日期：

    2025年11月26日

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  • Si-Yuan Wang,
  • Xin-Fang Wang,
  • Jia-Zhi Wang,
  • Shuang Jin

摘要

The mixed-ligand complexes cis-[(MoO)2O(glyc)2(phen)2]·5H2O (1) and trans-[(MoO)2O(glyc)2(phen)2] (1-5H2O) were synthesized under hydrothermal conditions. Cis-structure complex 1 exhibits reversible transformation to trans-structure complex 1-5H2O. Structural analysis reveals that the crystal structure of 1 contains 2D water cluster layers featuring twelve-membered rings. EPR spectroscopic studies demonstrate that the two molybdenum atoms in both 1 and 1-5H2O exist as independent paramagnetic centers. Furthermore, solid state 13C NMR spectra of 1 and 1-5H2O reveal large downfield shifts for the coordinated glycolate moieties. Notably, the catalytic performance of 1 in the degradation of methyl orange is significantly superior to that of 1-5H2O, which could be attributed to the steric hindrance difference induced by cis-trans isomerism.