An NMR Scale for Measuring the Base Strength of Solid Catalysts with Pyrrole Probe: A Combined Solid-State NMR Experiment and Theoretical Calculation Study
An NMR Scale for Measuring the Base Strength of Solid Catalysts with Pyrrole Probe: A Combined Solid-State NMR Experiment and Theoretical Calculation Study
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用吡咯探针测量固体催化剂基础强度的核磁共振标度:固态核磁共振实验和理论计算相结合的研究
DOI:
10.1021/acs.jpcc.6b11518
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发表时间:
2017-02
影响因子:
3.7
通讯作者:
Deng Feng
中科院分区:
文献类型:
--
作者:
Yi Xianfeng;Li Guangchao;Huang Ling;Chu Yueying;Liu Zhiqiang;Xia Hongqiang;Zheng Anmin;Deng Feng
Pyrrole has been employed as an NMR probe molecule to determine the base strength of solid catalytic materials; however, the quantitative correlation between the 1H chemical shift of adsorbed pyrrole and the intrinsic base strength of solid catalysts is still lacking in the previous work. Here, solid-state NMR experiments and density functional theory (DFT) calculations were employed to explore the adsorption structures and 1H chemical shifts of adsorbed pyrrole molecules over the zeolites with varied base strengths. Based on a generic 8T zeolite ((SiH3)3-Si-X-Si-O-(SiH3)3, X = O or NH), various calculated models with different Si–H bond lengths were constructed to represent the basic sites with varied strengths and used to predict the pyrrole adsorption structures as well as the 1H chemical shifts. The solid-state NMR experimental results demonstrated that a larger 1H chemical shift of adsorbed pyrrole corresponds to a stronger basic site on solid catalysts. A linear correlation between the 1H chemical s...
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影响因子:
15
作者:
Josef Macht;R. Carr;E. Iglesia
通讯作者:
Josef Macht;R. Carr;E. Iglesia
影响因子:
1.8
作者:
G. Bouchoux;D. Buisson;S. Bourcier;M. Sablier
通讯作者:
G. Bouchoux;D. Buisson;S. Bourcier;M. Sablier
DOI:
10.1021/jp056707v
发表时间:
2006-02
期刊:
The journal of physical chemistry. A
影响因子:
--
作者:
Xiaobo Zheng;P. Blowers
通讯作者:
Xiaobo Zheng;P. Blowers
影响因子:
5.3
作者:
M. Sánchez-Sánchez-M.-Sánchez-Sánchez-1398732651;T. Blasco
通讯作者:
M. Sánchez-Sánchez-M.-Sánchez-Sánchez-1398732651;T. Blasco
影响因子:
3.3
作者:
Barthos, R;Lónyi, F;Valyon, J
通讯作者:
Valyon, J