1－Ethoxycarbonylalkyldiphenylpolystyrylphosphonium triflates can be easily prepared by quaternizing diphenylpolystyryl phosphine with ethyl 2-trifloxyalkanoates;base treatment of these polymer-supported phosphonium t...1－Ethoxycarbonylalkyldiphenylpolystyrylphosphonium triflates can be easily prepared by quaternizing diphenylpolystyryl phosphine with ethyl 2-trifloxyalkanoates;base treatment of these polymer-supported phosphonium triflates affords 1-ethoxycarbonylalkylidenephosphoranes which are stable and undergo satisfactory Wittig reactions.展开更多
A direct spectrophotometric method for the determination of micro copper in aluminum alloy using PAN as chromogenic reagent has been proposed. In the presence of CTMAB,a stable red complex between Cu(Ⅱ) and PAN is fo...A direct spectrophotometric method for the determination of micro copper in aluminum alloy using PAN as chromogenic reagent has been proposed. In the presence of CTMAB,a stable red complex between Cu(Ⅱ) and PAN is formed in the buffer solution of pH1.3～4.5.The apparent molar absorptivity is 2.09×10 4L·mol -1 ·cm -1 at 558nm.The RSD is 0.8%(n=4).Beer’s law is obeyed for 0～80μg/25ml of Cu(Ⅱ).The linear correlation coefficient is 0.9998.展开更多
基金supported by the National Basic Research and Development Program of China(973 Program,2011CB710800)New Century Excellent Talents in University(NCET-11-0658)+2 种基金Natural Science Foundation of Jiangsu Province(BK2011150)the Program of Introducing Talents of Discipline to Universities(111-2-06)a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions~~
文摘1－Ethoxycarbonylalkyldiphenylpolystyrylphosphonium triflates can be easily prepared by quaternizing diphenylpolystyryl phosphine with ethyl 2-trifloxyalkanoates;base treatment of these polymer-supported phosphonium triflates affords 1-ethoxycarbonylalkylidenephosphoranes which are stable and undergo satisfactory Wittig reactions.
文摘A direct spectrophotometric method for the determination of micro copper in aluminum alloy using PAN as chromogenic reagent has been proposed. In the presence of CTMAB,a stable red complex between Cu(Ⅱ) and PAN is formed in the buffer solution of pH1.3～4.5.The apparent molar absorptivity is 2.09×10 4L·mol -1 ·cm -1 at 558nm.The RSD is 0.8%(n=4).Beer’s law is obeyed for 0～80μg/25ml of Cu(Ⅱ).The linear correlation coefficient is 0.9998.
