Supramolecular Assembly Based on Octamolybdate and Triazole Derivative: Crystal Structure and Catalytic Application in Olefin Epoxidation

Sonochemical Synthesis of a Nanosized Coordination Polymer with Catalytic Activity for Selective Epoxidation of Olefins

“…Coordination polymers have been designed using organic ligands and catalytically active inorganic ions, such as molybdenum (VI), and applied as heterogeneous catalysts with no need of immobilization on solid supports or post‐synthetic modifications . In this regard, we reported coordination polymers based on oxomolybdenum as well as polyoxomolybdate as heterogeneous epoxidation catalysts …”

Triazole‐Modified Molybdenum Oxide with High Proton Conductivity

“…[20] Moreover, the pKa values of 1,2,4-triazole (pKa 1 = 2.39, pKa 2 = 9.97) are obviously lower than those of imidazole (pKa 1 = 7.18, pKa 2 = 14.52), indicating that 1,2,4-triazole is easier to dissociate proton compared with imidazole. [21] Considering the above features of molybdenum oxides and triazole in the construction of proton-conducting material, we re-synthesized two triazole-modified molybdenum oxides using Na 2 MoO 4 ⋅ 2H 2 O and 1,2,4triazole or 3-amino-1,2,4-triazole under optimized synthetic conditions, [22,23] , and investigated their proton-conducting performances. The alternating current (AC) impedance measurements showed that 1 and 2 have high proton conductivities of 1.94 × 10 À 2 S cm À 1 (85°C, 95 % RH) and 1.3 × 10 À 3 S cm À 1 (65°C, 95 % RH), respectively.…”

Fe-doped H3PMo12O40 immobilized on covalent organic frameworks (Fe/PMA@COFs): a heterogeneous catalyst for the epoxidation of cyclooctene with H2O2

“…Previously, Jia and his group prepared various POMs or transition metal complex-based heterogeneous catalysts for olen epoxidation. [28][29][30][31][32][33][34] As a follow-up work, in this study, we prepared cost-effective imine-based COFs (COF-LZU1, CIN-1, and COF-300) using a reaction kettle. Then, phosphomolybdic acid (PMA) and iron ions were immobilized onto the COF supports by impregnation, and the resulting materials were denoted as Fe/PMA@COFs (Fe/PMA@COF-LZU1, Fe/ PMA@CIN-1, and Fe/PMA@COF-300).…”