Drastic sensitivity enhancement in ~(29)Si MAS NMR of zeolites and mesoporous silica materials by paramagnetic doping of Cu~(2+)

Satoshi Inagaki; Izuru Kawamura; Yukichi Sasaki

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Drastic sensitivity enhancement in ~(29)Si MAS NMR of zeolites and mesoporous silica materials by paramagnetic doping of Cu~(2+)

机译：顺磁性掺杂Cu〜（2+）可以显着提高沸石和中孔二氧化硅材料的〜（29）Si MAS NMR敏感性

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The paramagnetic doping of Cu~(2+) in both mesoporous silica materials and microporous silicate crystals (zeolites) can be used effectively to enhance the signal intensity of ~(29)Si solid state magic angle spinning NMR, as a result of shortening of the spin-lattice relaxation time, T1, by the paramagnetic effect, because of the Cu~(2+) electronic relaxation time in the range of 10~(-8) s. This leads to drastically reduced data-collection times, typically 80-fold shorter than that in mesoporous silica. We found that the estimated range of the paramagnetic effect of Cu~(2+) doping in porous silicates was at least 1 nm.

机译：介孔二氧化硅材料和微孔硅酸盐晶体（沸石）中Cu〜（2+）的顺磁掺杂可以有效地增强〜（29）Si固态幻角旋转NMR的信号强度，这是由于缩短了由于Cu〜（2+）电子的弛豫时间在10〜（-8）s范围内，所以顺磁效应使自旋晶格弛豫时间T1减小。这导致数据收集时间大大减少，通常比中孔二氧化硅短80倍。我们发现在多孔硅酸盐中Cu〜（2+）掺杂的顺磁效应的估计范围至少为1 nm。

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《Physical chemistry chemical physics: PCCP》 |2013年第32期|共9页
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Satoshi Inagaki; Izuru Kawamura; Yukichi Sasaki;
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1. Drastic sensitivity enhancement in ~(29)Si MAS NMR of zeolites and mesoporous silica materials by paramagnetic doping of Cu~(2+) [J] . Satoshi Inagaki, Izuru Kawamura, Yukichi Sasaki Physical chemistry chemical physics: PCCP . 2013,第32期

机译：顺磁性掺杂Cu〜（2+）可以显着提高沸石和中孔二氧化硅材料的〜（29）Si MAS NMR敏感性
2. Solid-state NMR spectra of paramagnetic silica-based materials: observation of Si-29 and Al-27 nuclei in the first coordination spheres of manganese ions [J] . Bakhmutov VI, Shpeizer BG, Clearfield A Magnetic Resonance in Chemistry: MRC . 2006,第9期

机译：顺磁性二氧化硅基材料的固态NMR光谱：在锰离子的第一个配位域中观察到Si-29和Al-27原子核
3. Atomic-Scale Structure of Mesoporous Silica-Encapsulated Pt and PtSn Nanoparticles Revealed by Dynamic Nuclear Polarization-Enhanced Si-29 MAS NMR Spectroscopy [J] . Zhao Evan Wenbo, Maligal-Ganesh Raghu, Mentink-Vigier Frederic, The journal of physical chemistry, C. Nanomaterials and interfaces . 2019,第12期

机译：动态核极化增强Si-29 MAS谱谱揭示了介孔二氧化硅包封的PT和PTSN纳米粒子的原子尺度结构
4. ~(29)Si MAS-NMR study of the silica condensation in the synthesis of mesoporous materials [C] . M.L.Guzman-Castillo, P.Perez-Romo, H.Armendariz-Herrera, the International Zeolite Symposium . 2005

机译：〜（29）Si Mas-NMR研究硅胶凝结在介孔材料的合成中
5. (13)C AND (29)SI NMR INVESTIGATION OF ACETONE ADSORBED ON SILICA SURFACES (CARBON-13, SILICON-29) [D] . PAN, VICKY HAIOU. 1997

机译：吸附在二氧化硅表面上的丙酮的（13）C和（29）SI NMR研究（CARBON-13，SILICON-29）
6. Isolation and immobilization of alkaline protease on mesoporous silica and mesoporous ZSM-5 zeolite materials for improved catalytic properties [O] . Arpana Kumari, Balwinder Kaur, Rajendra Srivastava, 2015

机译：碱性蛋白酶在介孔二氧化硅和介孔ZSM-5沸石材料上的分离和固定以改善催化性能
7. Atomic-Scale Structure of Mesoporous Silica-Encapsulated Pt and PtSn Nanoparticles Revealed by Dynamic Nuclear Polarization-Enhanced 29Si MAS NMR Spectroscopy [O] . Evan Wenbo Zhao, Raghu Maligal-Ganesh, Frederic Mentink-Vigier, 2019

机译：动态核偏振增强29SI MAS光谱显示的介孔二氧化硅包封的PT和PTSN纳米粒子的原子级结构

Drastic sensitivity enhancement in ~(29)Si MAS NMR of zeolites and mesoporous silica materials by paramagnetic doping of Cu~(2+)

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