Tag: Spectroscopy
Stereochemical assignment of trifluoroacetamides using NMR signals
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in ChemistryStereochemical assignment of N,N-dialkyl trifluoroacetamides using integrated analysis of through-space 1H···19F spin-spin couplings and aromatic solvent-induced shifts in 1H-NMR spectroscopy.
Calcium isotope selectivity was increased with polarized resonance ionization
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Selective resonance ionization technique using angular momentum selection rules and polarized light enables isolation of rare calcium isotopes Ca-43 and Ca-41 while suppressing abundant Ca-40.
Accurate rovibrational levels for He2 a3Σu+ state match spectroscopy
High-precision rovibrational computations for He2 a 3Σu+ state incorporating relativistic, QED, and nonadiabatic corrections with sub-ppm potential energy curve accuracy.
Low-energy electrons selectively cleaved DNA bonds in films
Study reveals energy-dependent selective bond cleavage in DNA films exposed to low-energy electrons using XPS analysis, showing preferential damage to N-glycosidic and sugar-phosphate bonds.
