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Spectroscopy of isolated gramicidin peptides.
Many details of intrinsic properties of biomolecules are masked by elements of the biological environment, such as the solvent and intermolecular interactions. Separation of the interandExpand
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Conformational structure of tyrosine, tyrosyl-glycine, and tyrosyl-glycyl-glycine by double resonance spectroscopy.
We investigated the variation in conformation for the amino acid tyrosine (Y), alone and in the small peptides tyrosine-glycine (YG) and tyrosine-glycine-glycine (YGG), in the gas phase by usingExpand
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Gas phase spectroscopy of the pentapeptide FDASV
Abstract IR–UV double resonance spectroscopy of the laser-desorbed, jet-cooled pentapeptide FDASV shows only one type of conformer in the gas phase. Comparison with computations at the B3LYP/6-31G ∗∗Expand
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Non-standard base pairing and stacked structures in methyl xanthine clusters.
We present resonant two-photon ionization and IR-UV double resonance spectra of methylated xanthine derivatives including 7-methylxanthine dimer and theobromine dimer seeded in a supersonic jet byExpand
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Effect of substituents on the excited-state dynamics of the modified DNA bases 2,4-diaminopyrimidine and 2,6-diaminopurine.
To explore the excited state dynamics of pyrimidine derivatives, we performed a combined experimental and theoretical study. We present resonant two-photon ionization (R2PI) and IR-UV doubleExpand
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Isomer discrimination of polycyclic aromatic hydrocarbons in the Murchison meteorite by resonant ionization.
We have used two-color resonant two-photon ionization (2C-R2PI) mass spectrometry to discriminate between isomers of polycyclic aromatic hydrocarbons in the Murchison meteorite. We measured theExpand
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Distribution of Nucleobases in CM and CR Carbonaceous Chondrites
Introduction: All living organisms are based on deoxyribonucleic acids (DNA), ribonucleic acids (RNA) and proteins. Both DNA and RNA are composed of nucleobases, which are one-ring (pyrimidine) orExpand
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IR-UV double resonance spectroscopy of guanine-H2O clusters.
We present the IR-UV double resonance spectrum of guanine monohydrate in the region 3100 cm(-1) to 3800 cm(-1) along with the energies and frequencies of these structures calculated at theExpand
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A tandem cascade cyclization-electrophilic aromatic substitution: application in the total synthesis of (+)-angelichalcone.
When cascade cyclizations initiated by Lewis acid-mediated opening of an epoxide are terminated through reaction with a MOM-protected phenol, a tandem electrophilic aromatic substitution can beExpand
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