In situ solid-state NMR studies of the catalytic conversion of methanol on the molecular sieve SAPO-34

1990 ◽  
Vol 94 (7) ◽  
pp. 2730-2734 ◽  
Author(s):  
Michael W. Anderson ◽  
Bogdan. Sulikowski ◽  
Patrick J. Barrie ◽  
Jacek. Klinowski
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Molecular Sieve ◽  
Catalytic Conversion ◽  
Nmr Studies

In Situ 13C Solid-State NMR Studies of the Catalytic Conversion of Methanol on Expanded Montmorillonites and Saponites

1995 ◽  
Vol 99 (18) ◽  
pp. 6980-6985 ◽  
Author(s):  
Heyong He ◽  
Lingao Zhang ◽  
Jacek Klinowski ◽  
Mario L. Occelli
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Catalytic Conversion ◽  
Nmr Studies

A kinetic study of mechanochemical halogen bond formation by in situ31P solid-state NMR spectroscopy

2017 ◽  
Vol 53 (71) ◽  
pp. 9930-9933 ◽  
Author(s):  
Yijue Xu ◽  
Lysiane Champion ◽  
Bulat Gabidullin ◽  
David L. Bryce
Keyword(s):  
Activation Energy ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Kinetic Study ◽  
Solid State Nmr ◽  
Halogen Bond ◽  
Bond Formation ◽  
Nmr Studies ◽  
Solid State Nmr Spectroscopy

In situ 31P solid-state NMR studies of mechanochemical halogen bond formation provide insights into the cocrystallisation process and an estimate of the activation energy.

Solid-state NMR studies of the borosilicate mesoporous molecular sieve MCM-41

1996 ◽  
Vol 92 (11) ◽  
pp. 2011 ◽  
Author(s):  
Shuangxi Liu ◽  
Heyong He ◽  
Zhaohua Luan ◽  
Jacek Klinowski
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Molecular Sieve ◽  
Mesoporous Molecular Sieve ◽  
Nmr Studies ◽  
Mcm 41

scholarly journals 1 H-Detected Solid-State NMR Studies of Water-Inaccessible Proteins In Vitro and In Situ

2016 ◽  
Vol 55 (43) ◽  
pp. 13606-13610 ◽  
Author(s):  
João Medeiros-Silva ◽  
Deni Mance ◽  
Mark Daniëls ◽  
Shehrazade Jekhmane ◽  
Klaartje Houben ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Studies

New in situ solid-state NMR techniques for probing the evolution of crystallization processes: pre-nucleation, nucleation and growth

2015 ◽  
Vol 179 ◽  
pp. 115-140 ◽  
Author(s):  
Colan E. Hughes ◽  
P. Andrew Williams ◽  
Victoria L. Keast ◽  
Vasileios G. Charalampopoulos ◽  
Gregory R. Edwards-Gau ◽  
...  
Keyword(s):  
Solid State ◽  
Liquid State ◽  
Solid State Nmr ◽  
Crystallization Process ◽  
Solid Particles ◽  
Crystal Formation ◽  
Nmr Studies ◽  
Nmr Techniques ◽  
Solid Phases

The application of in situ techniques for investigating crystallization processes promises to yield significant new insights into fundamental aspects of crystallization science. With this motivation, we recently developed a new in situ solid-state NMR technique that exploits the ability of NMR to selectively detect the solid phase in heterogeneous solid–liquid systems (of the type that exist during crystallization from solution), with the liquid phase “invisible” to the measurement. As a consequence, the technique allows the first solid particles produced during crystallization to be observed and identified, and allows the evolution of different solid phases (e.g., polymorphs) present during the crystallization process to be monitored as a function of time. This in situ solid-state NMR strategy has been demonstrated to be a powerful approach for establishing the sequence of solid phases produced during crystallization and for the discovery of new polymorphs. The most recent advance of the in situ NMR methodology has been the development of a strategy (named “CLASSIC NMR”) that allows both solid-state NMR and liquid-state NMR spectra to be measured (essentially simultaneously) during the crystallization process, yielding information on the complementary changes that occur in both the solid and liquid phases as a function of time. In this article, we present new results that highlight the application of our in situ NMR techniques to successfully unravel different aspects of crystallization processes, focusing on: (i) the application of a CLASSIC NMR approach to monitor competitive inclusion processes in solid urea inclusion compounds, (ii) exploiting liquid-state NMR to gain insights into co-crystal formation between benzoic acid and pentafluorobenzoic acid, and (iii) applications of in situ solid-state NMR for the discovery of new solid forms of trimethylphosphine oxide and l-phenylalanine. Finally, the article discusses a number of important fundamental issues relating to practical aspects, the interpretation of results and the future scope of these techniques, including: (i) an assessment of the smallest size of solid particle that can be detected in in situ solid-state NMR studies of crystallization, (ii) an appraisal of whether the rapid sample spinning required by the NMR measurement technique may actually influence or perturb the crystallization behaviour, and (iii) a discussion of factors that influence the sensitivity and time-resolution of in situ solid-state NMR experiments.

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