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Practical issues in nuclear resonant vibrational spectroscopy for measuring biological samples: special problems, solutions and some perspectives
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DOI：10.1080/05704928.2025.2571435.png)
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Abstract
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Nuclear resonant vibrational spectroscopy (NRVS) is a synchrotron based modern vibrational spectroscopy starting in mid 1990s. This review article focuses on a series of practical issues presented in NRVS for measuring biological samples. The main sections (Sec. 2 to Sec. 6) discuss the special problems facing bio-NRVS and the solutions to these problems. The example tasks include obtaining extra incident beam flux, calibrating energies for sectional scans, increasing signal versus reducing background, manipulating and monitoring samples, reducing real sample temperatures, as well as judging the best spectral simulation(s). All these are critical for successful measurement and understand of a bio-NRVS spectrum, especially of the one with extremely weak feature(s), e.g. the iron-hydride vibrational mode(s) inside various hydrogenases. This article will especially be useful as an overall guide for NRVS users, beamline scientists, and biochemists to work together on the entangled multiple discipline problems facing bio-NRVS. It will also provide general enlightenment for other spectroscopists to fight entangled issues in their measurements. In addition, Sec. 7 provides the readers with information about the latest developments and enlightenments about the future research while Sec. 1 provides a simple but still explanatory introduction for NRVS beginners.
Keywords:
Nuclear resonant vibrational spectroscopy (NRVS)
mobile high resolution monochromator (mobile HRM)
in-situ energy calibration using E0
biological samples
site-specific enrichment
real sample temperature
de-spiking
simulation based on characteristic features
machine learning concept
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