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Simple Hybrids Based on Mo or W Oxides and Diamines: Structure Determination and Catalytic Properties
Catalysis Letters ( IF 2.3 ) Pub Date : 2019-09-14 , DOI: 10.1007/s10562-019-02935-z
Barbara Bożek , Patrícia Neves , Marcin Oszajca , Anabela A. Valente , Jan Połtowicz , Katarzyna Pamin , Wiesław Łasocha

Abstract Crystalline hybrid catalysts based on molybdenum or tungsten oxide and aliphatic diamines were synthesized via simple, eco-friendly reproducible methodologies, starting from commercially available and relatively inexpensive organic and inorganic precursors, and using water as solvent under mild conditions. The crystal structures of the obtained fine powdered solids were solved ab initio from powder X-ray diffraction data. The type of organic component (1,2-diaminoethane, 1,2-diaminopropane, 1,3-diaminopropane) may play a structure-directing role. On the other hand, different metals (M = Mo, W) may lead to isostructural one-dimensional hybrids of the type MO 3 (L) with the same bidentate diamine ligand L. The prepared catalysts were investigated for the liquid phase oxidation of saturated and unsaturated hydrocarbons ( cis -cyclooctene, cyclooctane), using different types of oxidants (O 2 , H 2 O 2 , tert -butyl hydroperoxide). Differences in catalytic performances associated with distinct structural features were investigated. Graphic Abstract

中文翻译:

基于钼或钨氧化物和二胺的简单杂化物:结构测定和催化性能

摘要 基于钼或钨氧化物和脂肪族二胺的结晶杂化催化剂是通过简单、环保、可重复的方法合成的,从市售且相对便宜的有机和无机前体开始,并在温和条件下使用水作为溶剂。所得细粉固体的晶体结构由粉末X射线衍射数据从头解析。有机组分的类型(1,2-二氨基乙烷、1,2-二氨基丙烷、1,3-二氨基丙烷)可能起到结构导向作用。另一方面,不同的金属 (M = Mo, W) 可能导致具有相同双齿二胺配体 L 的 MO 3 (L) 型等结构一维杂化。和不饱和烃(顺式环辛烯,环辛烷),使用不同类型的氧化剂(O 2 、H 2 O 2 、叔丁基氢过氧化物)。研究了与不同结构特征相关的催化性能差异。图形摘要
更新日期:2019-09-14
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