Journal ArticleDOI
Matrix isolation studies of nucleic acid constituents. i. infrared spectra of uracil monomers
M. Szczesniak,Maciej J. Nowak,Hanna Rostkowska,Krystyna Szczepaniak,Willis B. Person,David Shugar +5 more
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TLDR
In this article, the authors proposed a method to solve the problem of energy minimization in the field of particle physics, using an energy minimisation algorithm based on the concept of energy maximization.Abstract:
Author Institution: Institute of Physics, Polish Academy of Sciences; Department of Chemistry, University of Floridaread more
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Journal ArticleDOI
IR spectral and theoretical characterization of intramolecular hydrogen bonds closing five-membered rings
TL;DR: In this article, a series of molecules with a common structural feature of a five-membered quasi-ring closed by an intramolecular hydrogen bond OH···OC interaction has been studied.
Journal ArticleDOI
Vibrational resonances in infrared spectra of uracils
TL;DR: In this article, two regions in the i.r. spectra of uracils are analyzed: (a) the NH stretching region in crystals, and (b) the CO bending region in matrix-isolated monomers.
Journal ArticleDOI
Spectroscopic identification of 2,4-pyrimidinedithiol; an experimental matrix isolation and ab initio Hartree-Fock and density functional theory study
TL;DR: The dithiol form of 2,4-dithiouracil was identified by comparison of the experimental spectrum with the spectrum theoretically predicted for this form at the HF/6-31 (d,p) and DFT(B-3LYP)/6- 31 (d-p) levels and assignment of the bands observed in the IR spectrum to the theoretically predicted normal modes.
Infrared spectral investigations of UV irradiated nucleobases adsorbed on mineral surfaces
TL;DR: In this article, the authors studied the photostability of nucleobases under space conditions in the presence of mineral matrices, to investigate both the prebiotic processes that might have had a role in the development of the first living entities on Earth and the physical and chemical processes occurring in extraterrestrial environments.
Journal ArticleDOI
Tautomerism, phototautomerism and infrared spectra of matrix-isolated 2-quinolinethione
TL;DR: In this paper, the IR spectra of thione and thiol tautomers of 2-quinolinethione isolated in Ar and N 2 low-temperature matrices are reported.
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Vibrational spectra of nucleic acid constituents—II: Planar vibrations of cytosine
H. Susi,J.S. Ard,J.M. Purcell +2 more