Biopolym. Cell. 1991; 7(6):77-82.
Structure and Function of Biopolymers
Interaction of nucleic acid bases molecules with low-energy electrons
1Sukhovija M. I., 1Slavik V. N., 1Shafranyosh I. I., 1Shimon L. L.
  1. Uzhhorod National University
    54, Voloshyna Str., Uzhhorod, Ukraine, 88000


Electron impact excitation, ionization and dissociation of gas-phase cytosine molecules were studied by optical and mass-spectrometric methods in the energy range of 0 to 300 eV. The luminescence spectra of cytosine and its dissociative excitation products were obtained within the region of 200 to 600 nm. Excitation functions for molecules in question were measured. Possible biophysical and radiobiological applications of the obtained results are discussed.


[1] Fielden EM, Lillicrap SC. Excited states and energy transfer in biomolecular systems. Curr Top Radiat Res. 1974; 7:138-80.
[2] Ladik J, Suhai S, Seel M. Electronic structure of biopolymers and possible mechanisms of chemical carcinogenesis. Int J Quant Chem. 1978;14(S5):35–49.
[3] GGribova ZP, Kayushin LP. Electron spin resonance of the excited triplet state of biologically important molecules. Russ Chem Rev. 1972; 41 (2):154-73
[4] Kupperman A, Raff LM. Excited states produced by low energy electrons. Phys processes in radiat biol. Ed. G. G. Augenstein. New York : Acad, press, 1964: 161-82.
[5] Cherdeby A. Nuclear radiation and polymers. M. Nauka. 1962 290 p.
[6] Sukhoviya MI, Shafranyosh II, Zapesonnyy IP. Excitation of the molecules adenine electrons. IX Proc. conf. on the physics of electron and atom collisions, Proc. of reports. Riga, 1984. Pt. 2:63.
[7] Shafranyosh II, Starodub BP, Shyshova TA, Aleksahin IS. Excitation of bismuth electron impact. Optika i spektroskopiya. 1981. 50, 4:658-662.
[8] Frish SE. Optical spectra of atoms. Fizmatgiz, 1963. 640 p.
[9] Volkova SE, Slavik VN, Sukhoviya MI et al. Mass spectrometric studies of nucleic acid bases.. Proc. conf. on the application of mass spectrometry in biology and medicine: Proc. of reports. Kharkiv, 1989:109-110.
[10] Fatio U. Collective effects in absorption of energy from ionising radiation. Comparative effects of radiation. New York : Wiley, 1961:14-21.
[11] Sukhodub LF. Interactions between nucleotide bases in coplanar and stacking dimers under vacuum. Mass spectrometric study. Biofizika. 1987;32(6):994-1005.
[12] Vinogradov IP, Zemskikh VV, Dodonova N Ye. The absorption spectra of nucleic acid bases (110-300 nm) and their luminescence excited in the vacuum ultraviolet region. Optika i spektroskopiya. 1974; 36(3):596-9.
[13] Prosser V, Siibertova E, Silinsh E, Zaloudek F. Investigations of the excited states of nucleic acid bases in thin films . Stud Biophys. 1973; 39(2):113-22.
[14] Agroskin LS, Korolev NV, Kulayev IS, Maisel MN. An ultraviolet fluorescence of nucleic acids and polyphosphates. Dokl Akad Nauk SSSR. 1960;131(6):1440-3.
[15] Pearse RW, Gaydon AG. The identification of molecular spectra. London: Chapman, 1963; 562 p.
[16] Herzberg G. Molecular Spectra and Molecular Structure. D. van Nostrand Company, Inc. 1963 ; vol 2 644 p.
[17] Gurvich VL, Karachevtsev GV, Kondrat'yev VN. et al. Dissociation energy of chemical bonds. Ionization potentials and electron affinities. M: Nauka, 1974. 351 p.
[18] Borisevich KA Excited states of complex molecules in the gas phase - Minsk: Nauka i tekhnika, 1967; 360 p.
[19] Zheltovskiy NV. Danilov VI. Quantum-mechanical study of the UV absorption spectra of nucleotide bases. Biofizika. 1974;19(5):784-9.
[20] Isaacson JC. The energy loss of fast electrons in biological molecules. Radiat Res. 1975; 62(3):547-51.
[21] Johnson DE. The interactions of 25 keV electrons with guanine and cytosine. Radiat Res. 1972;49(1):63-84.
[22] Lifschitz C, Bergmann ED, Pullman B. The ionization potentials of biological purines and pyrimidines. Tetrahedron Lett. 1967;46:4583-6.