固体核磁共振技术在锡硅分子筛表征中的应用
肖瑶1,2,夏长久3,易先锋1,*(
),刘凤庆1,2,刘尚斌4,郑安民1,*()
),刘凤庆1,2,刘尚斌4,郑安民1,*()
Progress in the Studies on Sn-Zeolites by Solid-State Nuclear Magnetic Resonance
Yao XIAO1,2,Chang-jiu XIA3,Xian-feng YI1,*(),Feng-qing LIU1,2,Shang-bin LIU4,An-min ZHENG1,*()
),Feng-qing LIU1,2,Shang-bin LIU4,An-min ZHENG1,*()
图2. (a) 脱水119Sn-Beta在水汽中（H2O/Sn=4）暴露不同时间的119Sn DP-CPMG MAS NMR谱图变化；(b) δSn ?581，?689和?703三处不同119Sn NMR信号积分面积与暴露时间之间的关联；(c) Sn-Beta分子筛Sn位点的水合机制（根据文献[
Fig.2. (a) Variation of 119Sn DP-CPMG MAS NMR spectra of 119Sn-Beta with time after exposure to water (H2O/Sn=4); (b) Variation of the normalized integrated intensity of 119Sn MAS NMR signals at ca. ?581, ?689, and ?703 ppm with time of exposure to water; (c) Dissociative adsorption scheme of water over tin sites in Sn-Beta (Reproduced from Ref. [
