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Title: Automatic fitting of multiple-field solid-state NMR spectra

Journal Article · · Solid State Nuclear Magnetic Resonance

The NMR lineshapes produced by half-integer quadrupolar nuclei are sensitive to 11 distinct fit parameters per inequivalent site. To date, automatic fitting routines have failed to replace manual parameter insertion and evaluation due to the importance of local minima and the need for fitting multiple-field magic-angle spinning (MAS) and static spectra simultaneously. Herein we introduce a new tool, AMES-Fit (Automatic Multiple Experiment Simulation and Fitting), to automatically find the global best-fit simulation parameters for a series of multiple-field NMR lineshapes. AMES-Fit uses an adaptive step size random search algorithm to dynamically probe parameter space and requires minimal human input. Importantly, the best fits are obtained in a few minutes of computation time that would otherwise have required several person-hours of work. The program is freely available and open-source.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF); National Institutes of Health (NIH)
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
2337493
Report Number(s):
IS-J--11,296
Journal Information:
Solid State Nuclear Magnetic Resonance, Journal Name: Solid State Nuclear Magnetic Resonance Vol. 131; ISSN 0926-2040
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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