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

Abstract

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° (d-spacing = 8.7 Å), 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, Co3(BTC)2·12H2O. We associated this transition with the conversion of the tetrahedral cobalt to octahedral cobalt.

Cobalt Phosphide Nanoparticles Synthesized by Solvothermal Phosphidization of Metal-Organic Frameworks for Electrocatalytic Oxygen Evolution

“…The XRD pattern of the Co MOF is shown in Figure S5, and the strong crystalline peak at 2θ = 10:2 °corresponds to a lattice spacing of 0.87 nm. The XRD pattern of Co MOF is consistent with previous reports of the Co 3 (BTC) 2 •12 H 2 O [34,35]. The Co MOF then reacted with excess P 4 solvothermally in different solvents to form Co-P.…”

Metal–Organic Framework-Derived ZnCoNi-Layered Double-Hydroxide Nanosheets with Charge Storage Characteristics for Supercapacitors

“…The XRD patterns of the assynthesized MOF templates are well matched with the earlier reports and are of amorphous nature. 33,34 After the in situ transformation of bimetallic MOFs with nickel nitrate, newly reorganized broad diffraction peaks are observed at 2θ = 12.9, 33.9, and 60.2°for the (003), (012), and (110) planes, respectively, of the LDH (JCPDS# 01-089-0461) (Figure 1a). The obtained patterns resembled the hexagonal crystal phase with a rhombohedral symmetry of hydrotalcite-type materials.…”