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2篇 您的检索式:作者名="Marcel Utz"
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1Probing the kinetics in supramolecular chemistry and molecular assembly by microfluidic-NMR spectroscopy显示文摘Microfluidic-NMR spectroscopy has been extended to study the kinetics in supramolecular chemistry and molecular assembly.Kinetics of a multicomponent host-guest supramolecular system containing viologen derivatives, β-cyclodextrins and cucurbit[7]urils are studied by a PMMA based microfluidic chip combined with a dedicated transmission line probe for NMR detection.By combining microfluidic technology with NMR spectroscopy, the amount of material required for a full kinetic study could be minimized. This is crucial in supramolecular chemistry, which often involves highly sophisticated and synthetically costly building blocks. The small size of the microfluidic structure is crucial in bringing the time scale for kinetic monitoring down to seconds. At the same time, the transmission line NMR probe provides sufficient sensitivity to work at low(2 m M) concentrations.Hongxun Fang Yibin Sun Xinchang Wang Manvendra Sharma Zhong Chen Xiaoyu Cao Marcel Utz Zhongqun Tian 2018Science China Chemistry2018,61,11:1
2Kinetic Investigation of a Cucurbit[7]uril-Based Pseudo[6]rotaxane System by Microfluidic Nuclear Magnetic Resonance显示文摘It is challenging to investigate fast supramolecular processes due to the lack of appropriate characterization methods with high structural resolution.In this study,microfluidic nuclear magnetic resonance(μFNMR)spectroscopy was employed to monitor the kinetics of threading and dethreading of a pseudo[6]rotaxane system.By employing high time resolutionμF-NMR,1 H and two-dimensional(2D)rotating frame nuclear Overhauser effect spectroscopy(ROESY)NMR spectra were recorded at any time point within 1.5 s after the onset of the process.This technique enabled the successful identification of kinetic intermediates and rate-determining steps,usually impossible to determine by other spectroscopic techniques.Thus,our study demonstrates the capability ofμF-NMR in investigating the mechanism of complex supramolecular systems.Yibin Sun Hongxun Fang Xujing Lin Xiuxiu Wang Ganyu Chen Xinchang Wang Zhongqun Tian Liulin Yang Marcel Utz Xiaoyu Cao 2022CCS Chemistry2022,4,2:0
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