期刊文献+
共找到6篇文章
< 1 >
每页显示 20 50 100
Degradation Mechanism of Cationic Red X-GRL by Ozonation 被引量:14
1
作者 Wei Rong ZHAO xin hua xu +1 位作者 Hui Xiang SHI Da Hui WANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第12期1309-1312,共4页
The degradation mechanism of Cationic Red X-GRL was investigated when the intermediates, the nitrate ion and the pH were analyzed in the ozonation. The degradation of the Cationic Red X-GRL includes the de-auxochrome... The degradation mechanism of Cationic Red X-GRL was investigated when the intermediates, the nitrate ion and the pH were analyzed in the ozonation. The degradation of the Cationic Red X-GRL includes the de-auxochrome stage, the decolour stage, and the decomposition of fragment stage. During the degradation process, among the six nitrogen atoms of Cationic Red X-GRL, one is transferred into a nitrate ion, one becomes the form of an amine compound, and the rest four are transformed into two molecules of nitrogen. In the course of the ozonation of Cationic Red X-GRL, the direct attack of ozone is the main decolour effect. 展开更多
关键词 OZONATION cationic Red X-GRL MECHANISM INTERMEDIATES DYE decolourization.
下载PDF
Catalytic Dechlorination of Chlorobenzene in Water by Pd/Fe System 被引量:6
2
作者 xin hua xu Hong Yi ZHOU Da Hui WANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第7期700-703,共4页
Chlorobenzene was dechlorinated by Pd/Fe bimetallic system in water through catalytic reduction. The dechlorination rate increases with increase of bulk loading of Pd due to the increase of both the surface loading o... Chlorobenzene was dechlorinated by Pd/Fe bimetallic system in water through catalytic reduction. The dechlorination rate increases with increase of bulk loading of Pd due to the increase of both the surface loading of the Pd and the total surface area. For conditions with 0.005% Pd/Fe, 45% dechlorination efficiency was achieved within 5 h. The dechlorinated reaction is believed to take place on the bimetal surface in a pseudo-first-order reaction, with the rate constant being 0.0043 min-1. 展开更多
关键词 Reductive dechlorination CATALYTIC PD/FE chlorobenzene.
下载PDF
A new synthesis of alkynyl tellurides promoted by CsOH and 4 MS 被引量:2
3
作者 Yin Hui Li Jian Ping Li +3 位作者 Xiang Xia Kang Bing Zou Ruo xin Li xin hua xu 《Chinese Chemical Letters》 SCIE CAS CSCD 2008年第12期1401-1402,共2页
The mixture of cesium hydroxide and terminal alkynes in dry DMF in the presence of 4 A molecular sieves was stirred for 3.0 h at room temperature under N2, then aryltellurenyl bromide in THF was added, and the reactio... The mixture of cesium hydroxide and terminal alkynes in dry DMF in the presence of 4 A molecular sieves was stirred for 3.0 h at room temperature under N2, then aryltellurenyl bromide in THF was added, and the reaction mixture was stirred for 2.0 h. Alkynyl tellurides were obtained in about 90% yields by flash chromatography. 展开更多
关键词 Cesium hydroxide Terminal alkynes Alkynyl telluiride
下载PDF
Reduction of Diaryldiselenides by System of Cp_2TiCl_2/Bu^iMgBr/THF and Its Application in Synthesis of Unsymmetrical Diaryl Selenides
4
作者 xin hua xu Xian huaNG(Institute of Elemento-Organic Chemistry, Nankai University Tianjin 300071Department of Chemistry, Zhejiang University, Xi Xi Campus, Hangzhou 310028) 《Chinese Chemical Letters》 SCIE CAS CSCD 2000年第6期473-474,共2页
Reduction of diaryldiselenides by the system of Cp2TiCl2/Bu'MgBr/THF gave the nucleophilic arylselenium complex. They reacted with diaryl iodonium salts to afford unsymmetrical diaryl selenides in high yields.
关键词 Diaryl selenides REDUCTION titanocene dichloride isobutylmagnesium bromide arylselenium complex of titanocene diaryl iodonium salts unsymmetrical diaryl selenides
下载PDF
Reaction of Arylselenium Titanocene Complexes with Diaryl Iodonium Salts——a Convenient Synthesis of Unsymmetrical Diarylselenides
5
作者 Xiang huaNG Lu Ling WU xin hua xu 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第5期377-378,共2页
The diaryldiselenides reacted with titanocene hydried (Cp2TiH) generted from Cp2TiCl2/i-BuMgBr to give arylselenium complexes of titanocene. They reacted readily with diaryliodoiums salt to give unsymmetical diaryls... The diaryldiselenides reacted with titanocene hydried (Cp2TiH) generted from Cp2TiCl2/i-BuMgBr to give arylselenium complexes of titanocene. They reacted readily with diaryliodoiums salt to give unsymmetical diarylselenides. 展开更多
关键词 Diarylselenide diaryl iodonium salt arylselenium titanocene complexes synthesis.
下载PDF
Cesium hydroxide-catalyzed hydrothiolation of alkynyl selenides to highly stereo- and regioselectively synthesize(Z)-1-organoseleno-2-arylthio-1-alkenes 被引量:1
6
作者 Ai He Yu Ren hua Qiu +2 位作者 Nian Yuan Tan Li Feng Peng xin hua xu 《Chinese Chemical Letters》 SCIE CAS CSCD 2011年第6期687-690,共4页
In the presence of catalytic amount of cesium hydroxide the hydrothiolation of alkynyl selenides occurred at room temperature in DMF under nitrogen atmosphere to give exclusive(Z)-1-organoseleno-2-arylthio-1-alkene ... In the presence of catalytic amount of cesium hydroxide the hydrothiolation of alkynyl selenides occurred at room temperature in DMF under nitrogen atmosphere to give exclusive(Z)-1-organoseleno-2-arylthio-1-alkene in excellent yields.It could provide a new and expedient way for the preparation of(Z)-1-arylseleno-2-arylthio-1-alkene. 展开更多
关键词 HYDROTHIOLATION Cesium hydroxide Alkynyl selenides (Z)-1-Organoseleno-2-arylthio-1-alkene
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部