RELAXATION OF THE OPTICAL ANISOTROPY OF MOLECULAR COMPLEXES IN THE GASEOUS PHASE
Abstract
The time kinetics of the optically induced anisotropy of molecular complexes with a nonequilibrium rotational distribution arising in the process of their formation in the gaseous phase is calculated. It is shown that damped periodic oscillations with the period and amplitude depending on additional angular moments appear in the relaxation kinetics of anisotropy.The additional angular moments are determined by the vectors of the moments of forces in the translational-rotational exchange, taking into account the law of the total angular momentum conservation of the molecules forming the complex. With an increase in their magnitude, the process of orientational relaxation of anisotropy becomes largely modulated. An estimation of the degree of optical anisotropy modulation and the moments of forces while the chemical bonds appear can be used to сlarify the stereo dynamics of the complex formation process.
Keywords
molecular complex,
rotational-translational exchange,
anisotropy of light absorption and emission,
dynamics of molecular rotation
Supporting agencies: Работа выполнена при поддержке Белорусского республиканского фонда фундаментальных исследований (проект № Ф18АЗ-024).
About the Authors
A. P. Blokhin
B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus
Belarus
Belarus
68-2 Nezavisimosti Prosp., Minsk, 220072
V. A. Tolkachev
B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus
Belarus
Belarus
68-2 Nezavisimosti Prosp., Minsk, 220072
References
1. J. S. Baskin, A. H. Zewail. J. Phys. Chem., 105 (1994) 3337—3351
2. U. Marvet, M. Dantus. Chem. Phys. Lett., 245 (1995) 393—399
3. U. Marvet, Q. Zhang, E. J. Brown, M. Dantus. J. Chem. Phys., 109 (1998) 4415—4442
4. J. S. Baskin, A. H. Zewail. J. Phys. Chem. A, 105 (2001) 3680—3692
5. A. P. Blokhin, M. F. Gelin. Phys. Chem. Chem. Phys. 1 (1999) 5583—5586
6. А. П. Блохин, М. Ф. Гелин. Опт. и спектр., 88 , № 5 (2000) 806—813 [ A. P. Blokhin, M. F. Gelin. Opt. Spectrosc., 88 , N 5 (2000) 806–813]
7. A. P. Blokhin, M. F. Gelin. Phys. Chem. Chem. Phys., 4 (2002) 3356—3364
8. А. П. Блохин. Журн. прикл. спектр., 80 , № 3 (2013) 58—64 [ A. P. Blokhin. J. Appl. Spectr., 80 , N 1 (2013) 54–60]
9. A. P. Blokhin, M. F. Gelin, I. I. Kalosha, S. A. Polubisok, V. A. Tolkachev. J. Chem. Phys., 110 (1999) 978—993
10. А. П. Блохин. Журн. прикл. спектр., 85 , № 6 (2018) 879—885 [ A. P. Blokhin. J. Appl. Spectr., 85 , N 6 (2018) 1006—1012]
11. Д. А. Варшалович, А. Н. Москалев, В. К. Херсонский. Квантовая теория углового момента, Ленинград, Наука (1975)
12. М. Абрамовиц, И. Стиган. Справочник по специальным функциям, Москва, Наука (1979)
13. M. Felker, A. H. Zewail. Femtochemistry, 1 (1995) 193—260
14. V. V. Matylitsky, C. Riehn, M. F. Gelin, B. Brutschy. J. Chem. Phys., 119 (2003) 10553—10562
15. C. Riehn, V. V. Matylitsky, M. F. Gelin, B. Brutschy. Mol. Phys., 103 (2005) 1615—1621
Review
For citations:
Blokhin A.P., Tolkachev V.A. RELAXATION OF THE OPTICAL ANISOTROPY OF MOLECULAR COMPLEXES IN THE GASEOUS PHASE. Zhurnal Prikladnoii Spektroskopii. 2019;86(6):874-879. (In Russ.)
Views: 243
Email this article 