Influence of Surplus Negative Charge on Absorption and Fluorescence Excitation Spectra of Asymmetric Polymethine Dyes

V. I. Borysyuk; V. M. Yashchuk; A. P. Naumenko; A. V. Stanova; V. G. Gerasova; A. O. Gerasov; Yu. P. Kovtun; M. P. Shandura; O. D. Kachkovsky

doi:10.15407/ujpe60.07.0593

Influence of Surplus Negative Charge on Absorption and Fluorescence Excitation Spectra of Asymmetric Polymethine Dyes

Authors

V. I. Borysyuk Taras Shevchenko National University of Kyiv, Faculty of Physics
V. M. Yashchuk Taras Shevchenko National University of Kyiv, Faculty of Physics
A. P. Naumenko Taras Shevchenko National University of Kyiv, Faculty of Physics
A. V. Stanova Taras Shevchenko National University of Kyiv, Faculty of Physics
V. G. Gerasova Taras Shevchenko National University of Kyiv, Faculty of Chemistry
A. O. Gerasov Institute of Organic Chemistry, Nat. Acad. of Sci. of Ukraine
Yu. P. Kovtun Institute of Organic Chemistry, Nat. Acad. of Sci. of Ukraine
M. P. Shandura Institute of Organic Chemistry, Nat. Acad. of Sci. of Ukraine
O. D. Kachkovsky Institute of Organic Chemistry, Nat. Acad. of Sci. of Ukraine

DOI:

https://doi.org/10.15407/ujpe60.07.0593

Keywords:

anion polymethine dyes, absorption spectra, fluorescence spectra, fluorescence excitation anisotropy spectra, quantum-chemical calculations, current-voltage characteristic

Abstract

The combined spectral and quantum-chemical investigations of the vinylog series of the asymmetric anionic polymethine dyes, derivatives of aminocoumarin, as well as the related symmetric dyes, are fulfilled. The charge injection to these types of dyes leads to the essential shifts of electronic levels. The calculations show the inverse character of the first two electron transitions in anionic polymethines and relative cationic polymethines. It is established that going to asymmetric dyes leads to a slight decrease of the spectral effect of the chromophore lengthening. The influence of the asymmetry manifests itself in a positive deviation in the absorption spectra and a negative deviation of the second electron transition manifested visually in the anisotropy of the fluorescence excitation spectra of asymmetric dyes. It is found that the lengthening of the chromophore is accompanied by an increase of the deviation of the first electron transition and, in contrast, by a decrease of the deviation of the second transition. The obtained results may be used in the design of molecular systems with prognosed current-voltage characteristics for nanoelectronics.

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Published

2019-01-17

How to Cite

Borysyuk, V. I., Yashchuk, V. M., Naumenko, A. P., Stanova, A. V., Gerasova, V. G., Gerasov, A. O., Kovtun, Y. P., Shandura, M. P., & Kachkovsky, O. D. (2019). Influence of Surplus Negative Charge on Absorption and Fluorescence Excitation Spectra of Asymmetric Polymethine Dyes. Ukrainian Journal of Physics, 60(7), 593. https://doi.org/10.15407/ujpe60.07.0593

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Issue

Vol. 60 No. 7 (2015)

Section

Optics, lasers, and quantum electronics

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