糠酸甲酯的清洁生产工艺

羧酸糠醇酯在国内是一类新型的、用途较广的食用香料,最早在天然咖啡的香气中发现,是重要的咖啡香气成分之一.     

Solvothermal Synthesis,Crystal Structure and Photocurrent Property of a Ti_6-Core-based Titanium Oxo Cluster

A Ti₆-core-based titanium oxo cluster (TOC)[Ti₆(m₂-O)₂(m₃-O)₂(Bpo)₂(PhCOO)_8(Oi Pr)_4]assembled by 2,2'-biphenol (H₂Bpo) and benzoic acid has been synthesized and characterized by IR,elemental analyses,thermogravimetric analysis and X-ray diffraction technique.Single-crystal X-ray diffraction analysis revealed that the complex crystallizes in monoclinic system,space group P2₁/n.The structure contains two Ti₃(m₃-O) units featuring a flat mode as building blocks.Solid-state UV/Vis absorption spectrum reveals that complex 1 shows a wide range from 240 to 650 nm.Moreover,the optical band gap of 1 is estimated to be 2.35 eV.Additionally,the Ti_6-TOC exhibits good photocurrent response.     

超声辐射快速合成偶氮取代苯甲酰氯

超声辐射下,以偶氮取代苯甲酸为原料,氯化亚砜为氯化剂,合成了8种偶氮取代苯甲酰氯系列产物。与普通加热搅拌法相比,反应时间由12h缩短至4h,收率达80%～95%。目标化合物结构经红外光谱、核磁共振和元素分析测试技术得到确证。     

（CTAB）_9[Sb_1W_9O_（33）]的制备及其光谱分析

利用溶胶-凝胶法合成了K9[Sb1W9O33],用十六烷基三甲基溴化铵（CTAB）对K9[Sb1W9O33]改性,得到了（CTAB）9[Sb1W9O33],以过氧化氢氧化环己醇制取环己酮为探针反应,考察了n（Sb）∶n（W）对催化剂催化活性的影响,评价结果表明：催化剂金属原子配比n（Sb）∶n（W）=1∶9,催化活性最高,在该条件下,环己酮的选择性达到了最大值99.2%。通过XRD、FT IR的检测,揭示了（CTAB）9[Sb1W9O33]的微观结构和内在规律性,[Sb1W9O33]9-与CTAB＋之间存在协同效应,实验结果为工业装置的技术改造提供了较好的实验依据。