Cage and ladder structures of silsesquioxanes characterized by UV-MALDI-TOF mass spectrometry  

作　　者：尤宏 胡立江 刘琰 张兴文 张皓 

机构地区：[1]Dept. of Environmental Engineering, Harbin Institute of Technology, Harbin 150001, China [2]Dept. of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China [3]Dept. of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, Chinahe molar mass distribution of SSO in the first generation derived from the hydrolytic condensation of two trialkoxysilanes, [3- (Methacryloxy) propyl] trimethoxysilane (MPMS) and vinyltrimethoxysilane (VMS), are determined by UV-MALDI-TOF MS. The comparisons of theoretical masses with experimental masses are calculated using the proposed compounds, which are assigned to formulas Tn (OH)_m, T_n (OMe)_y or T_n(OH)_x(OMe)_y[T=RSiO_(1.5-(x+y)/2n), R=--(CH_2)_3OOCCH(CH_3)CH_2 and--CHCH_2]. Both the proposed cage and ladder structures of SSO derived from similar sol-gel process of monomers are illustrated. The causes for the difference in structures between SSO_M and SSO_v is discussed as well.

出　　处：《Journal of Harbin Institute of Technology(New Series)》2003年第3期295-299,共5页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the Foundation of Department of Science and Technology of Heilongjiang Province

摘　　要：The molar mass distribution of SSO in the first generation derived from the hydrolytic condensation oftwo trialkoxysilanes, [ 3- ( Methacryloxy ) propyl ] trimethoxysilane ( MPMS ) and vinyltrimethoxysilane ( VMS ) ,are determined by UV-MALDI-TOF MS. The comparisons of theoretical masses with experimental masses arecalculated using the proposed compounds, which are assigned to formulas Tn (OH)m, Tn (OMe)y orTn(OH)x(OMe)y[T=RSiO1.5 (x+y)/2n, R=--(CH2)3OOCCH(CH3)CH2 and--CHCH2]. Both theproposed cage and ladder structures of SSO derived from similar sol-gel process of monomers are illustrated. Thecauses for the difference in structures between SSO M and SSO V is discussed as well.The molar mass distribution of SSO in the first generation derived from the hydrolytic condensation of two trialkoxysilanes, [3- (Methacryloxy) propyl] trimethoxysilane (MPMS) and vinyltrimethoxysilane (VMS), are determined by UV-MALDI-TOF MS. The comparisons of theoretical masses with experimental masses are calculated using the proposed compounds, which are assigned to formulas Tn (OH)_m, T_n (OMe)_y or T_n(OH)_x(OMe)_y[T=RSiO_(1.5-(x+y)/2n), R=——(CH_2)_3OOCCH(CH_3)CH_2 and——CHCH_2]. Both the proposed cage and ladder structures of SSO derived from similar sol-gel process of monomers are illustrated. The causes for the difference in structures between SSO_M and SSO_v is discussed as well.

关 键 词：molar mass distribution hydrolytic condensation cage and ladder structure 

分 类 号：O633.11[理学—高分子化学] O657.63[理学—化学]