Raman spectral studies of nucleic acids and related molecules—I Ribonucleic acid derivatives

Titanocene derivatives of purine and adenine. Synthesis and characterization of reaction products with (η5-C5H5)2Ti(CO)2, (η5-C5H5)2TiCl, and (η5-C5H5)2TiCl2

“…The band assignment for the free ligands are those given in the literature (41)(42)(43)(44)(45)(46)(47). The frequencies for complexes 4-8 were tentatively correlated as much as possible with those of the ligands.…”

Resonant Infrared Multiple Photon Dissociation Spectroscopy of Anionic Nucleotide Monophosphate Clusters

“…Experiments by Thomas and co-workers confirm the existence of the keto and amino tautomers in solution. 7 A comparison of solution phase spectra with solid phase spectra showed strong hydrogen bonding in the crystalline bases uracil, cytosine and adenine but did not yield conclusions about the nucleotides and did not show any interaction between the bases or the phosphates in solution. 7 A later study by Thomas and coworkers examined mixtures of nucleotides, showing no change in the spectrum of pure vs mixed solutions, concluding that only stacked structures were present.…”

“…7 A comparison of solution phase spectra with solid phase spectra showed strong hydrogen bonding in the crystalline bases uracil, cytosine and adenine but did not yield conclusions about the nucleotides and did not show any interaction between the bases or the phosphates in solution. 7 A later study by Thomas and coworkers examined mixtures of nucleotides, showing no change in the spectrum of pure vs mixed solutions, concluding that only stacked structures were present. 8 Experiments aimed at studying isolated base pairing interactions typically use nonpolar solvents and substituted nucleosides to minimize hydrogen bonding competition from the solvent and to promote hydrogen bonded base pairing.…”

Electronic spectral studies and thermodynamic parameters of 5- Fluoro -1, 3- Dimethyl Uracil

“…Recently computational methods based on density functional theory are becoming widely used. In the past two decades, ab initio quantum mechanical calculations of molecular structure and force field have contributed much to understanding of the vibrational spectra of organic compounds [6][7][8][9].…”