| Institution: | 1. Department of Chemistry, Adamas University, Barasat, Kolkata, 700126 India;2. Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475 USA;3. Instituto de Física, Universidade Federal Fluminense, 24210-346 Niterói, Rio de Janeiro, Brasil
Departamento de Química, Pontifícia Universidade Católica, Gávea, Rio de Janeiro, RJ, 22453-900 Brasil;4. Department of Chemistry, CICECO – Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal;5. Instituto de Física, Universidade Federal Fluminense, 24210-346 Niterói, Rio de Janeiro, Brasil |
| Abstract: | A novel triazole bridged cobalt fluorophosphate coordination polymer with the formula {Co5(1,2,4-triazole)2(OH)2(PO3F)4}n has been synthesized. Single crystal X-ray studies reveal that the compound comprises of Co5 clusters which ultimately build the whole framework, here all cobalt centers are in octahedral geometry established from continuous shape analysis. All the cobalt centers are in Co(II) oxidation state and the results are supported by the bond valence sum (BVS) calculation. The sample has been characterized by single crystal X-ray, powder X-ray, FTIR and TGA analysis. The compound was tested for olefin catalysis performance and magnetism. Magnetization measurements reveal overall antiferromagnetic interactions among the Co(II) ions. The compound is very active in the catalytic transformation of olefins to their corresponding epoxides. Catalytic epoxidation studies reveal that cyclohexene and styrene can be converted up to 97 % with almost 65 % selectivity of products with higher TON numbers. |
