All Stories

  1. Quantum mechanical studies of 2D nanobiohybrids (Review Article)

    Article • Low Temperature Physics, April 2022, American Institute of Physics

    Stepan Stepanian

  2. What are molecular effects of co-administering vitamin C with artemisinin-type antimalarials? A model mass spectrometry and quantum chemical study

    Article • Journal of Molecular Structure, May 2021, Elsevier

    Stepan Stepanian

  3. Coronene-uracil complexes embedded in argon matrices: FTIR spectroscopy and quantum-mechanical calculations

    Article • Low Temperature Physics, April 2021, American Institute of Physics

    Stepan Stepanian

  4. Biomolecules and their complexes with nanostructures

    Article • Low Temperature Physics, March 2021, American Institute of Physics

    Stepan Stepanian

  5. Molecular structure and vibrational spectra of isolated nucleosides at low temperatures (Review article)

    Article • Low Temperature Physics, March 2021, American Institute of Physics

    Stepan Stepanian

  6. The influence of low-temperature argon matrix on embedded water clusters. A DFT theoretical study

    Article • Low Temperature Physics, March 2021, American Institute of Physics

    Stepan Stepanian

  7. Adsorption of Polyadenylic acid on graphene oxide: experiments and computer modeling

    Article • Journal of Biomolecular Structure and Dynamics, September 2020, Taylor & Francis

    Stepan Stepanian

  8. The effect of matrices on the low-temperature IR spectra of a formic acid molecule isolated in inert gas crystals

    Article • Low Temperature Physics, February 2020, American Institute of Physics

    Stepan Stepanian

  9. Rich structural topology of the anion formed by the complex of acetonitrile with two water molecules

    Article • Chemical Physics Letters, February 2020, Elsevier

    Stepan Stepanian

  10. New cardioprotective agent flokalin and its supramolecular complexes with target amino acids: An integrated mass-spectrometry and quantum-chemical study

    Article • Journal of Molecular Structure, October 2017, Elsevier

    Stepan Stepanian

  11. Comparison of noncovalent interactions of zigzag and armchair carbon nanotubes with heterocyclic and aromatic compounds: Imidazole and benzene, imidazophenazines, and tetracene

    Article • Chemical Physics, February 2017, Elsevier

    Stepan Stepanian

  12. Effect of low-temperature argon matrices on the IR spectra and structure of flexible N-acetylglycine molecules

    Article • Low Temperature Physics, December 2016, American Institute of Physics

    Stepan Stepanian

  13. The effect of protonation of cytosine and adenine on their interactions with carbon nanotubes

    Article • Journal of Molecular Graphics and Modelling, November 2016, Elsevier

    Stepan Stepanian

  14. Noncovalent Interaction of Graphene with Heterocyclic Compounds: Benzene, Imidazole, Tetracene, and Imidazophenazines

    Article • ChemPhysChem, February 2016, Wiley

    Stepan Stepanian

  15. Enhancement of infrared absorption of low-temperature uracil thin films by a nanostructured silver surface

    Article • Low Temperature Physics, February 2016, American Institute of Physics

    Stepan Stepanian

  16. FTIR spectra and conformational structure of deutero-β-alanine isolated in argon matrices

    Article • Journal of Molecular Spectroscopy, February 2016, Elsevier

    Stepan Stepanian

  17. Scenario of temperature-related variation of phosphorescence spectra of ortho-bromobenzophenone crystal

    Article • Chemical Physics, December 2015, Elsevier

    Stepan Stepanian

  18. Quantum-Mechanical Investigations of Noncovalent Interactions of Carbon Materials

    Article • November 2015, Taylor & Francis

    Stepan Stepanian

  19. Competing intermolecular interactions of artemisinin-type agents and aspirin with membrane phospholipids: Combined model mass spectrometry and quantum-chemical study

    Article • Chemical Physics, July 2015, Elsevier

    Stepan Stepanian

  20. Interactions of the Watson–Crick nucleic acid base pairs with carbon nanotubes and graphene: DFT and MP2 study

    Article • Chemical Physics Letters, August 2014, Elsevier

    Stepan Stepanian

  21. Unusual behavior of the pyrimidine–2-hydroxypyrimidine heterodimer isolated in argon matrices

    Article • Chemical Physics Letters, July 2014, Elsevier

    Stepan Stepanian

  22. Conformational composition of neutral leucine. Matrix isolation infrared and ab initio study

    Article • Chemical Physics, September 2013, Elsevier

    Stepan Stepanian

  23. Mass-spectrometric study of the formation of silver nanoclusters in polyether media: 2. Fast atom bombardment and modeling

    Article • Journal of Analytical Chemistry, November 2012, Pleiades Publishing Ltd

    Stepan Stepanian

  24. Tautomeric transitions of isocytosine isolated in argon and neon matrices induced by UV irradiation

    Article • Journal of Molecular Structure, October 2012, Elsevier

    Stepan Stepanian

  25. UV-induced isomerization of β-alanine isolated in argon matrices

    Article • Journal of Molecular Structure, October 2012, Elsevier

    Stepan Stepanian

  26. Noncovalent Interaction of Methylene Blue with Carbon Nanotubes: Theoretical and Mass Spectrometry Characterization

    Article • The Journal of Physical Chemistry C, September 2012, American Chemical Society (ACS)

    Stepan Stepanian

  27. Ultrasound-assisted Synthesis of Azlactone and its Reactions with Nucleophiles

    Article • Mendeleev Communications, September 2012, Elsevier

    Stepan Stepanian

  28. Low Temperature Matrix Isolation IR-Spectroscopy and Quantum Chemical Study of β-Alanine Structure

    Article • Biophysical Journal, January 2012, Elsevier

    Stepan Stepanian

  29. Noncovalent Interaction of Single-Walled Carbon Nanotubes with 1-Pyrenebutanoic Acid Succinimide Ester and Glucoseoxidase

    Article • The Journal of Physical Chemistry C, October 2011, American Chemical Society (ACS)

    Stepan Stepanian

  30. Raman Spectroscopy and Theoretical Characterization of Nanohybrids of Porphyrins with Carbon Nanotubes

    Article • The Journal of Physical Chemistry C, September 2010, American Chemical Society (ACS)

    Stepan Stepanian

  31. Competition between counterions and active protein sites to bind bisquaternary ammonium groups. A combined mass spectrometry and quantum chemistry model study

    Article • The European Physical Journal D, May 2010, Springer Science + Business Media

    Stepan Stepanian

  32. Rotational states of dipole-bound anions of hydrogen cyanide

    Article • Chemical Physics Letters, May 2009, Elsevier

    Stepan Stepanian

  33. Raman Spectroscopy Study and First-Principles Calculations of the Interaction between Nucleic Acid Bases and Carbon Nanotubes

    Article • The Journal of Physical Chemistry A, March 2009, American Chemical Society (ACS)

    Stepan Stepanian

  34. Pre-resonance Raman and IR absorption spectroscopy of imidazophenazine and its derivatives: Experimental and ab initio study

    Article • Vibrational Spectroscopy, July 2008, Elsevier

    Stepan Stepanian

  35. Stacking interaction of cytosine with carbon nanotubes: MP2, DFT and Raman spectroscopy study

    Article • Chemical Physics Letters, June 2008, Elsevier

    Stepan Stepanian

  36. SWNT-DNA and SWNT-polyC Hybrids: AFM Study and Computer Modeling

    Article • Journal of Nanoscience and Nanotechnology, March 2008, American Scientific Publishers

    Stepan Stepanian

  37. Noncovalent complexes of tetramethylammonium with chlorine anion and 2,5-dihydroxybenzoic acid as models of the interaction of quaternary ammonium biologically active compounds with their molecular targets: A theoretical study

    Article • Journal of Molecular Structure THEOCHEM, August 2007, Elsevier

    Stepan Stepanian

  38. ‘Wet chemistry’ and crystallochemistry reasons for acidic matrix suppression by quaternary ammonium salts under matrix-assisted laser desorption/ionization conditions

    Article • Rapid Communications in Mass Spectrometry, January 2007, Wiley

    Stepan Stepanian

  39. Buckling, Bundling, and Pattern Formation: From Semi-Flexible Polymers to Assemblies of Interacting Filaments

    Article • Journal of Computational and Theoretical Nanoscience, December 2006, American Scientific Publishers

    Jan Kierfeld, Stepan Stepanian

  40. Interaction of fragmented double-stranded DNA with carbon nanotubes in aqueous solution

    Article • Molecular Physics, October 2006, Taylor & Francis

    Stepan Stepanian

  41. IR Spectra of Photopolymerized C60 Films. Experimental and Density Functional Theory Study

    Article • The Journal of Physical Chemistry B, July 2006, American Chemical Society (ACS)

    Stepan Stepanian

  42. Stability and Size Effect Analysis of Isomeric Sodium Nanowires

    Article • Journal of Computational and Theoretical Nanoscience, June 2006, American Scientific Publishers

    Stepan Stepanian

  43. Hydrogen-bonded complexes of 2-aminopyrimidine–parabenzoquinone in an argon matrix

    Article • Low Temperature Physics, February 2006, American Institute of Physics

    Stepan Stepanian

  44. Evaluation of the reduction of imidazophenazine dye derivatives under fast-atom-bombardment mass-spectrometric conditions

    Article • Journal of Mass Spectrometry, January 2006, Wiley

    Stepan Stepanian

  45. Multilevel Quantum Chemistry Approach to the Development of a Database of the SAM-Ligand-Metal Ion-Protein Interactions

    Article • Journal of Computational and Theoretical Nanoscience, September 2005, American Scientific Publishers

    Stepan Stepanian

  46. Isotope Effects in Dipole-Bound Anions of Acetone

    Article • Physical Review Letters, April 2005, American Physical Society (APS)

    Stepan Stepanian

  47. On the stability of the organic dication of the bisquaternary ammonium salt decamethoxinum under liquid secondary ion mass spectrometry

    Article • Rapid Communications in Mass Spectrometry, February 2005, Wiley

    Stepan Stepanian

  48. Absorption and fluorescent spectral studies of imidazophenazine derivatives

    Article • Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, July 2004, Elsevier

    Stepan Stepanian

  49. Uracil−Adenine Dimer Connected by an Excess Electron

    Article • The Journal of Physical Chemistry A, September 2003, American Chemical Society (ACS)

    Stepan Stepanian

  50. Combined Raman scattering and ab initio investigation of the interaction between pyrene and carbon SWNT

    Article • Molecular Physics, August 2003, Taylor & Francis

    Stepan Stepanian

  51. Conformational Behavior of Cyanoacetic Acid:  A Combined Matrix Isolation Fourier Transform Infrared Spectroscopy and Theoretical Study

    Article • The Journal of Physical Chemistry A, July 2003, American Chemical Society (ACS)

    Igor Reva, Stepan Stepanian

  52. Missing conformers. Comparative study of conformational cooling in cyanoacetic acid and methyl cyanoacetate isolated in low temperature inert gas matrixes

    Article • Chemical Physics Letters, June 2003, Elsevier

    Igor Reva, Stepan Stepanian

  53. Matrix-isolation FT-IR studies and theoretical calculations of the vibrational properties of 4-methyl-2′-hydroxy-4′-ethyloxyazobenzene

    Article • Chemical Physics, January 2003, Elsevier

    Stepan Stepanian

  54. Modeling of recognition sites of nucleic acid bases aaand amide side chains of amino acids. Combination of experimental and theoretical approaches

    Article • The European Physical Journal D, September 2002, Springer Science + Business Media

    Stepan Stepanian

  55. Conformers of Nonionized Proline. Matrix-Isolation Infrared and Post-Hartree−Fock ab Initio Study

    Article • The Journal of Physical Chemistry A, November 2001, American Chemical Society (ACS)

    Igor Reva, Stepan Stepanian

  56. Combined FTIR Matrix Isolation and Ab Initio Studies of Pyruvic Acid:  Proof for Existence of the Second Conformer

    Article • The Journal of Physical Chemistry A, April 2001, American Chemical Society (ACS)

    Igor Reva, Stepan Stepanian

  57. Theoretical ab initio study of the interconversion barriers of glycine and a-alanine conformers

    Article • Biopolymers and Cell, September 1999, Institute of Molecular Biology and Genetics (NAS Ukraine)

    Stepan Stepanian

  58. Combined matrix isolation IR spectroscopic and ab initio quantum chemical study of the molecular structure of aminomethylphosphinic acid

    Article • Journal of Molecular Structure, June 1999, Elsevier

    Igor Reva, Stepan Stepanian

  59. Combined Matrix-Isolation Infrared and Theoretical DFT and ab Initio Study of the Nonionized Valine Conformers

    Article • The Journal of Physical Chemistry A, May 1999, American Chemical Society (ACS)

    Igor Reva, Stepan Stepanian

  60. Structure and energy of nucleic acid base–amino acid complexes: 1. 1-methyl-uracil-acrylamide

    Article • Journal of Molecular Structure, March 1999, Elsevier

    Stepan Stepanian

  61. Theoretical ab initio study of O–H vibrational band in gas-phase glycine conformers

    Article • Chemical Physics Letters, July 1998, Elsevier

    Stepan Stepanian

  62. Conformational Behavior of α-Alanine. Matrix-Isolation Infrared and Theoretical DFT and ab Initio Study

    Article • The Journal of Physical Chemistry A, May 1998, American Chemical Society (ACS)

    Igor Reva, Stepan Stepanian

  63. Matrix-Isolation Infrared and Theoretical Studies of the Glycine Conformers

    Article • The Journal of Physical Chemistry A, January 1998, American Chemical Society (ACS)

    Igor Reva, Stepan Stepanian

  64. Competition between H-bonded and stacked dimers of pyrimidine: IR and theoretical ab-initio study

    Article • Molecular Physics, June 1997, Taylor & Francis

    Stepan Stepanian

  65. Competition between H-bonded and stacked dimers of pyrimidine: IR and theoretical ab-initio study

    Article • Molecular Physics, June 1997, Taylor & Francis

    Stepan Stepanian

  66. Infrared spectra of benzoic acid monomers and dimers in argon matrix

    Article • Vibrational Spectroscopy, May 1996, Elsevier

    Igor Reva, Stepan Stepanian

  67. Dependence of the biological activity and mass spectrometric pattern on the structure peculiarities of the molecule of alkylating drug thiotepa

    Article • Biophysical Chemistry, January 1996, Elsevier

    Stepan Stepanian

  68. Infrared spectra and the structure of 1-methyladenine in an argon matrix and solutions

    Article • Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, May 1995, Elsevier

    Igor Reva, Stepan Stepanian

  69. An infrared study on matrix-isolated benzoic acid

    Article • Journal of Molecular Structure, April 1995, Elsevier

    Igor Reva, Stepan Stepanian

  70. The rotamerization of conformers of glycine isolated in inert gas matrices. An infrared spectroscopic study

    Article • Chemical Physics Letters, January 1995, Elsevier

    Igor Reva, Stepan Stepanian

  71. Infrared matrix isolation studies of amino acids. Molecular structure of proline

    Article • Journal of Molecular Structure, March 1994, Elsevier

    Igor Reva, Stepan Stepanian

  72. Proton transfer in autoassociates and hydrates of pyrimidine bases: an MNDO/M study

    Article • Journal of Molecular Structure, July 1992, Elsevier

    Stepan Stepanian

  73. Modelling of formation processes of inclusion complexes of coumarin laser dyes and ?-cyclodextrin by the MM2 force field method. I. 7-Amino-4-methylcoumarins

    Article • Molecular Engineering, January 1992, Springer Science + Business Media

    Stepan Stepanian

  74. Vibrational spectra and molecular structure of nucleic acid bases and their complexes in low temperature matrices

    Article • Journal of Molecular Structure, March 1990, Elsevier

    Stepan Stepanian

  75. MNDO and IR spectroscopic studies of tautomerism of isocytosine

    Article • Journal of Molecular Structure, January 1990, Elsevier

    Stepan Stepanian

  76. Studies of vibrational spectra of 6-fluorothymine and its methyl derivatives

    Article • Spectrochimica Acta Part A Molecular Spectroscopy, January 1990, Elsevier

    Stepan Stepanian

  77. IR spectra of guanine and hypoxanthine isolated molecules

    Article • Journal of Molecular Structure, May 1987, Elsevier

    Stepan Stepanian

  78. Theoretical and experimental studies of adenine, purine and pyrimidine isolated molecule structure

    Article • Journal of Molecular Structure, November 1985, Elsevier

    Stepan Stepanian