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 298 和 473 K 范围内 ^1H MAS NMR 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。沸石中酸性质子的 ^1H MAS NMR 谱的温度依赖性线形显示了沸石结构中质子迁移的第一个明确的证据。质子的动态性质是比 NMR 化学位移和 OH 键的红外带位置等静态参数更灵敏的质子活性测量方法。变温 ^1H MAS NMR 是了解固体酸中质子动态性质的非常有用的技术。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。