运用^(29)Si、^(27)Al MAS NMR法研究了氟化物法、络合剂法、水热处理法和酸处理法制备的高硅铝比Y沸石。^(27)Al谱表明,在有络合剂存在下的液固相脱铝产物中不含有非骨架的六配位Al原子。高温水热处理的NH_4Y沸石和抽A1补Si的Y沸石中...运用^(29)Si、^(27)Al MAS NMR法研究了氟化物法、络合剂法、水热处理法和酸处理法制备的高硅铝比Y沸石。^(27)Al谱表明,在有络合剂存在下的液固相脱铝产物中不含有非骨架的六配位Al原子。高温水热处理的NH_4Y沸石和抽A1补Si的Y沸石中除含有四、六配位Al原子外,还含有另一种状态的非骨架Al原子。^(29)QSi谱表明,(NH_4)_2SiF_6法制备的Y沸石中非骨架成分的含量与制备条件有关。该成分的含量可通过对^(29)Si MAS NMR谱图的模拟进行定量估算。展开更多
The interaction of cisplatin and its analogues with phospholipid molecules of hu-man erythrocyte membranes was studied using IR and ￣31 P NMR methods. Dramatic changes were ob-served at 1300～953 cm￣-1 frequency reg...The interaction of cisplatin and its analogues with phospholipid molecules of hu-man erythrocyte membranes was studied using IR and ￣31 P NMR methods. Dramatic changes were ob-served at 1300～953 cm￣-1 frequency region on the IR spectra .Based on the IR data analysis, it was speculated that the Pt(II) complexes interacted mainly with the polar head groups of phospholipids through electrostatic interaction and certain coordination patterns. The 1 2 h dynamic experiment showed that a recoverable process occurred in case of cis-DCDP and an unrecoverable one for other pt(II)analogues.A similar conclusion could be obtained from￣31 P NMR experimental results.The di-versity was discussed.展开更多
文摘运用^(29)Si、^(27)Al MAS NMR法研究了氟化物法、络合剂法、水热处理法和酸处理法制备的高硅铝比Y沸石。^(27)Al谱表明,在有络合剂存在下的液固相脱铝产物中不含有非骨架的六配位Al原子。高温水热处理的NH_4Y沸石和抽A1补Si的Y沸石中除含有四、六配位Al原子外,还含有另一种状态的非骨架Al原子。^(29)QSi谱表明,(NH_4)_2SiF_6法制备的Y沸石中非骨架成分的含量与制备条件有关。该成分的含量可通过对^(29)Si MAS NMR谱图的模拟进行定量估算。
文摘The interaction of cisplatin and its analogues with phospholipid molecules of hu-man erythrocyte membranes was studied using IR and ￣31 P NMR methods. Dramatic changes were ob-served at 1300～953 cm￣-1 frequency region on the IR spectra .Based on the IR data analysis, it was speculated that the Pt(II) complexes interacted mainly with the polar head groups of phospholipids through electrostatic interaction and certain coordination patterns. The 1 2 h dynamic experiment showed that a recoverable process occurred in case of cis-DCDP and an unrecoverable one for other pt(II)analogues.A similar conclusion could be obtained from￣31 P NMR experimental results.The di-versity was discussed.
