Variable Temperature ^1H MAS NMR : A Powerful Tool for the Investigation of Dynamic Properties of Acidic Protons in Zeolites

变温 ^1H MAS NMR：研究沸石中酸质子动态性质的强大工具

• 批准号: 09650857
• 负责人: BABA Toshihide
• 金额: $ 2.18万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650857/
• 关键词: ^1H MAS NMR; Zeolite; Acidic Protons; Solid-acid; Catalyst; Metallisilocate; モビリティー

The dynamic nature of the protons in zeolites such as H-ZSM-5, metallosilicates molecular sieves and heteropoly compounds was examined by temperature dependence of ^1H MAS NMR in the range of 298 and 473 K.The temperature dependent line shape of ^1H MAS NMR spectra of acidic protons in zeolites showed the first and unambiguous evidence for proton migration in zeolite structure. The dynamic property of protons was a more sensitive measure for the activity of protons than the static parameters such as NMR chemical shift and IR band position of OH bonds.The variable temperature ^1H MAS NMR is a very useful technique for understanding dynamic properties of protons in solid-acids. The dynamic property is an important factor influencing of the catalytic activity of a solid-acid catalyst.

通过^1H MAS NMR在298和473 K范围内的温度依赖性来检查H-ZSM-5、金属硅酸盐分子筛和杂多化合物等沸石中质子的动态性质。^1H MAS的温度依赖性线形状沸石中酸性质子的核磁共振谱显示了质子在沸石结构中迁移的第一个明确的证据。与 NMR 化学位移和 OH 键的 IR 带位置等静态参数相比，质子的动态特性是对质子活性更敏感的测量。变温 ^1H MAS NMR 是了解质子动态特性的非常有用的技术在固体酸中。动力学性能是影响固体酸催化剂催化活性的重要因素。

项目成果

Toshihide Baba, Norito Komatsu and Yoshio Ono: "Nature of the Acidic protons in H-Mordenite H-MCM-22As Studied by Variable Temperature ^1H MAS NMR" Microporous Mater. 22. 203-210 (1998)

Toshihide Baba、Norito Komatsu 和 Yoshio Ono：“通过变温 ^1H MAS NMR 研究的 H-丝光沸石 H-MCM-22As 中酸性质子的性质”微孔材料。

Toshihide Baba: "Mobility of the Acidic Protons in H-ZSM-5 As Studied by Variable Temperature ^1H MAS NMR" J.Phys.Chem.B. 102. 804-808 (1998)

Toshihide Baba：“通过变温 ^1H MAS NMR 研究 H-ZSM-5 中酸性质子的迁移率”J.Phys.Chem.B。

Toshihide Baba: "Nature of the Audic Protons in H-mordenite and H-MCM-22 as Studied by Variable Temperature ^1H MAS NMR" Microprous Mesoporous Mater.22. 203-210 (1998)

Toshihide Baba：“通过变温 ^1H MAS NMR 研究 H-丝光沸石和 H-MCM-22 中的 Audic 质子的性质”Microprous Mesoporous Mater.22。

Toshihide Baba, Norito Kumatsu, Yoshio Ono: "Mobility of the Acidic Phrtons in H-Zsiu-5 As Studied by Variabce Temperature ^1H MAS NMR" Journul of Physicul Chemistry. 印刷中.

Toshihide Baba、Norito Kumatsu、Yoshio Ono：“通过温度变化 ^1H MAS NMR 研究 H-Zsiu-5 中酸性 Phrton 的迁移率”物理化学杂志正在出版。