Temperature Effect on 1H Chemical Shift of Hydroxyl Groups in Zeolites

温度对沸石中羟基1H化学位移的影响

• 批准号: 24656486
• 负责人: BABA Toshihide
• 金额: $ 2.58万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2013-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24656486/
• 关键词: H-ZSM-5; 温度可変1H MAS NMR; ケミカルシフト; 酸強度; ゼオライト; 酸性プロトン; 固体高分解能核磁気共鳴

The influence of temperature on 1H chemical shift due to hydroxyl groups in H+-exchanged any kinds of zeolites (ZSM-5 type zeolites including silicalite, mordenite and Y zeolites) was examined by variable temperatures 1H magic-angle spinning nuclear magnetic resonance (1H MAS NMR) spectroscopy measured from 298 to 673 K. The temperature dependence of the 1H chemical shift due to the bridging hydroxyl groups was more pronounced than that due to the terminal silanol groups and also the nest silanol groups. The relationship between the 1H chemical shift and the acid strength of the hydroxyl groups in zeolites was discussed on the basis of the variable temperature 1H MAS NMR measurements of zeolites, previously reported thermal analysis data, such as the heat of NH3 adsorption measured by NH3 temperature-programmed desorption, and also the catalytic activity for the conversion of ethanol and 1-hexene.

用298~673K的变温1H魔角旋转核磁共振(1H MAS)谱研究了温度对H+交换分子筛(ZSM-5型分子筛，包括硅沸石、丝光沸石和Y型分子筛)中羟基引起的1H化学位移的影响。根据变温~1H-MAS核磁共振法测定了沸石分子筛的~1H化学位移与分子筛中羟基的酸强度之间的关系，根据已报道的热分析数据，如NH3程序升温脱附法测定了NH_3的吸附热，以及对乙醇和1-己烯转化的催化活性，讨论了分子筛的~1H化学位移与分子筛中羟基的酸强度的关系。

项目成果

^1H MAS NMRからみた高温におけるゼオライトの水酸基の性質と酸触媒特性

^1H 从 MAS NMR 看出沸石中羟基的性质和高温下酸催化剂的性质

• 发表时间: 2012
• 作者: Hajime Munakata;To-ru Koyama;Tatsuaki Yashima;Naoki Asakawa;Toshinori O-nuki;Ken Motokura;Akimitsu Miyaji;Toshihide Baba;宗像元・小山徹・本倉健・宮地輝光・馬場俊秀;宗像元,小山徹,八嶋建明,本倉健,宮地輝光,馬場俊秀
• 通讯作者: 宗像元,小山徹,八嶋建明,本倉健,宮地輝光,馬場俊秀

Shape-Selective Catalysis Determined by the Volume of a Zeolite Cavity and the Reaction Mechanism for Propylene Production by the Conversion of Butene Using a Proton-Exchanged Zeolite

• DOI: 10.1021/jp212549j
• 发表时间: 2012-02
• 期刊: Journal of Physical Chemistry C
• 影响因子: 3.7
• 作者: Y. Iwase;Y. Sakamoto;A. Shiga;A. Miyaji;Ken Motokura;To-ru Koyama;T. Baba

^1H MAS NMRからみた高温におけるゼオライト水酸基の性質と酸触媒特性

^1H 从 MAS NMR 看出高温下沸石羟基的性质和酸催化剂性质

• 发表时间: 2013
• 作者: Hajime Munakata;To-ru Koyama;Tatsuaki Yashima;Naoki Asakawa;Toshinori O-nuki;Ken Motokura;Akimitsu Miyaji;Toshihide Baba;宗像元・小山徹・本倉健・宮地輝光・馬場俊秀
• 通讯作者: 宗像元・小山徹・本倉健・宮地輝光・馬場俊秀

Proton exchange reaction between hydroxyl groups in the supercage and those in the sodalitecage of Y zeolite as studied by variable temperature 1H MAS NMR

变温1H MAS NMR研究Y型沸石超级笼与方钠石笼羟基之间的质子交换反应

• 发表时间: 2012
• 期刊: The Journal of Physical Chemistry C
• 作者: Krishna Reddy Jakkidi;Ken Motokura;To-ru Koyama;Akimitsu Miyaji;and Toshihide Baba;Naoki Asakawa,Ken Motokura,Tatsuaki Yashima,To-ru Koyama,Toshinori O-nuki,Akimitsu Miyaji,Toshihide Baba
• 通讯作者: Naoki Asakawa,Ken Motokura,Tatsuaki Yashima,To-ru Koyama,Toshinori O-nuki,Akimitsu Miyaji,Toshihide Baba

Temperature Effect on 1H Chemical Shift of Hydroxyl Groups in Zeolites and Their Catalytic Activities as Solid Acids

• DOI: 10.1021/jp3043945
• 发表时间: 2012-07-12
• 期刊: JOURNAL OF PHYSICAL CHEMISTRY C
• 影响因子: 3.7
• 作者: Munakata, Hajime;Koyama, To-ru;Baba, Toshihide
• 通讯作者: Baba, Toshihide