TY - JOUR
T1 - Vanadium(V) complexes supported on porous MIL-100(Fe) as catalysts for the selective oxidation of toluene
AU - Sutradhar, Manas
AU - Marques, Guilherme
AU - Soliman, Mohamed M.A.
AU - Guedes da Silva, M. Fátima C.
AU - Flores, Daniela S.S.
AU - Granadeiro, Carlos M.
AU - Balula, Salete S.
AU - Pombeiro, Armando J.L.
AU - Alegria, Elisabete C.B.A.
N1 - Publisher Copyright:
© 2022 Elsevier Inc.
PY - 2022/8
Y1 - 2022/8
N2 - The vanadium(V) complexes bearing the aroylhydrazone Schiff base 2-hydroxy-N'-((2-hydroxynaphthalen-1-yl)methylene)benzohydrazide ligand [VO(OMe)L] (1) and [Et3NH][VO2L] (2) were synthesized, characterized and supported on porous MIL-100(Fe) forming the 1@MIL-100(Fe) and 2@MIL-100(Fe) composites. The outcome of such immobilizations was assessed by several characterization techniques, namely powder X-ray diffraction, UV/Vis, FTIR, SEM-EDS, ICP and BET surface area analysis, confirming the successful heterogenization of both vanadium complexes. They were screened as catalysts towards the oxidation of toluene, under homogenous (1 and 2) and heterogeneous (1@MIL-100 and 2@MIL-100) conditions. The influence of several parameters, namely the type and amount of catalyst or oxidant, reaction time, temperature, and radical trapping, was studied. The main products obtained were benzaldehyde, benzyl alcohol and benzoic acid. Under the optimized conditions, using 1 and 2 as homogeneous catalysts, total yields of 19 and 23%, respectively, were achieved at 80 °C after 6 h. Using 1@MIL100(Fe) and 2@MIL100(Fe) composites under heterogeneous conditions, total yields up to 11% after 24 h, were achieved.
AB - The vanadium(V) complexes bearing the aroylhydrazone Schiff base 2-hydroxy-N'-((2-hydroxynaphthalen-1-yl)methylene)benzohydrazide ligand [VO(OMe)L] (1) and [Et3NH][VO2L] (2) were synthesized, characterized and supported on porous MIL-100(Fe) forming the 1@MIL-100(Fe) and 2@MIL-100(Fe) composites. The outcome of such immobilizations was assessed by several characterization techniques, namely powder X-ray diffraction, UV/Vis, FTIR, SEM-EDS, ICP and BET surface area analysis, confirming the successful heterogenization of both vanadium complexes. They were screened as catalysts towards the oxidation of toluene, under homogenous (1 and 2) and heterogeneous (1@MIL-100 and 2@MIL-100) conditions. The influence of several parameters, namely the type and amount of catalyst or oxidant, reaction time, temperature, and radical trapping, was studied. The main products obtained were benzaldehyde, benzyl alcohol and benzoic acid. Under the optimized conditions, using 1 and 2 as homogeneous catalysts, total yields of 19 and 23%, respectively, were achieved at 80 °C after 6 h. Using 1@MIL100(Fe) and 2@MIL100(Fe) composites under heterogeneous conditions, total yields up to 11% after 24 h, were achieved.
KW - Heterogeneous catalysts
KW - MIL-100(Fe)
KW - Toluene oxidation
KW - VOCs
KW - Vanadium(V) complexes
UR - http://www.scopus.com/inward/record.url?scp=85133935099&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2022.112091
DO - 10.1016/j.micromeso.2022.112091
M3 - Article
AN - SCOPUS:85133935099
SN - 1387-1811
VL - 341
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
M1 - 112091
ER -