Triazolyl, Imidazolyl, and Carboxylic Acid Moieties in the Design of Molybdenum Trioxide Hybrids: Photophysical and Catalytic Behavior.
Triazolyl, Imidazolyl, and Carboxylic Acid Moieties in the Design of Molybdenum Trioxide Hybrids: Photophysical and Catalytic Behavior.
复制标题
三氧化钼杂化物设计中的三唑基、咪唑基和羧酸部分:光物理和催化行为
DOI:
10.1021/acs.inorgchem.6b02986
复制
发表时间:
2017
影响因子:
4.6
通讯作者:
I. S. Gonçalves
中科院分区:
文献类型:
--
作者:
A. B. Lysenko;G. A. Senchyk;K. V. Domasevitch;M. Kobalz;H. Krautscheid;J. Cichos;M. Karbowiak;P. Neves;A. A. Valente;I. S. Gonçalves
Three organic ligands bearing 1,2,4-triazolyl donor moieties, (S)-4-(1-phenylpropyl)-1,2,4-triazole (trethbz), 4-(1,2,4-triazol-4-yl)benzoic acid (trPhCO2H), and 3-(1H-imidazol-4-yl)-2-(1,2,4-triazol-4-yl)propionic acid (trhis), were prepared to evaluate their coordination behavior in the development of molybdenum(VI) oxide organic hybrids. Four compounds, [Mo2O6(trethbz)2]·H2O (1), [Mo4O12(trPhCO2H)2]·0.5H2O (2a), [Mo4O12(trPhCO2H)2]·H2O (2b), and [Mo8O25(trhis)2(trhisH)2]·2H2O (3), were synthesized and characterized. The monofunctionaltr-ligand resulted in the formation of a zigzag chain [Mo2O6(trethbz)2] built up fromcis-{MoO4N2} octahedra united through common μ2-O vertices. Employing the heterodonor ligand withtr/–CO2Hfunctions afforded either layer or ribbon structures of corner- or edge-sharing {MoO5N} polyhedra (2aor2b) stapled bytr-links in axial positions, whereas −CO2H groups remained uncoordinated. The presence of theim-heterocycle as an extra function intrhisfacilitated formation of zwitterionic molecules with a protonated imidazolium group (imH+) and a negatively charged −CO2–group, whereas thetr-fragment was left neutral. Under the acidic hydrothermal conditions used, the organic ligand binds to molybdenum atoms either through [N–N]-tror through both [N–N]-trand μ2-CO2–units, which occur in protonated bidentate or zwitterionic tetradentate forms (trhisH+andtrhis, respectively). This leads to a new zigzag subtopological motif (3) of negatively charged polyoxomolybdate {Mo8O25}n2n–consisting of corner- and edge-sharingcis-{MoO4N2} and {MoO6} octahedra, while the tetradentate zwitterrionictrhisspecies connect these chains into a 2D net. Electronic spectra of the compounds showed optical gaps consistent with semiconducting behavior. The compounds were investigated as epoxidation catalysts via the model reactions of achiral and prochiral olefins (cis-cyclooctene andtrans-β-methylstyrene) withtert-butylhydroperoxide. The best-performing catalyst (1) was explored for the epoxidation of other olefins, including biomass-derived methyl oleate, methyl linoleate, and prochiraldl-limonene.
登录
查看更多内容
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
P. Reis;C. Gamelas;José A. Brito;Nathalie Saffon;M. Gómez;B. Royo
通讯作者:
B. Royo
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
W. You;Xin Guo;Xiao;Cui;Lancui Zhang;Zhengang Sun
通讯作者:
Zhengang Sun
影响因子:
2.7
作者:
F. Sécheresse
通讯作者:
F. Sécheresse
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
Yan Xu;Jianjiang Lu;N. Goh
通讯作者:
N. Goh
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
Jack W. Johnson;A. Jacobson;S. Rich;J. Brody
通讯作者:
J. Brody