4.5 Article

Water-Driven Structural Transformation in Cobalt Trimesate Metal-Organic Frameworks

Journal

ENERGIES
Volume 14, Issue 16, Pages -

Publisher

MDPI
DOI: 10.3390/en14164751

Keywords

MOFs; solvothermal synthesis; cobalt trimesate; Co-3(BTC)(2); 12H(2)O

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Funding

  1. IITM
  2. Chennai Institute of Technology, Chennai

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The synthesis and characterization of a novel cobalt trimesate metal-organic framework, KCL-102, were reported in the study. It was found that KCL-102 exhibited low stability in humid air and transformed into a hydrous cobalt trimesate phase, which was associated with the conversion of tetrahedral cobalt to octahedral cobalt.
We report on the synthesis and the characterization of a novel cobalt trimesate metal-organic framework, designated as KCL-102. Powder X-ray diffraction pattern of KCL-102 is dominated by a reflection at 10.2 degrees (d-spacing = 8.7 angstrom), while diffuse reflectance UV-Vis spectroscopy indicates that the divalent cobalt centers are in two different coordination geometries: tetrahedral and octahedral. Further, the material shows low stability in humid air, and it transforms into the well-known phase of hydrous cobalt trimesate, Co-3(BTC)(2)center dot 12H(2)O. We associated this transition with the conversion of the tetrahedral cobalt to octahedral cobalt.

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