American Journal of Applied Chemistry
Volume 8, Issue 5, October 2020, Pages: 121-125
Received: Jul. 23, 2020;
Accepted: Aug. 5, 2020;
Published: Sep. 3, 2020
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Vitaly Antonovich Tolkachev, Institute of Physics, National Academy of Sciences of Belarus, Minsk, Belarus
Determination of gap between optically combining states (0-0- transition) from diffuse vibronic absorption or emission spectra is possible now for homogeneous ensembles of chromophores. If the observed spectra present composite polymorphic chromophores or different species they are formed by partial spectra and differing electronic transitions. For these conditions the indicating pure-electronic transition frequency attribute is distorted, smeared or even absent. That behavior is qualitative indication of the chromophore inhomogeneity. The same would be because of impurities. It is shown that the approach of inhomogeneity qualitative indication by spectra is adaptable to different structural forms of chromophor and at polymorphic sites of containing the chromophore media. The experimental data show that the approach is applicable to see the chromophore inhomogeneity by linear and circular vibronic spectra even of molecular dye-labels. The examples of observed distortions for the spectra of different composite species in different media as manifestation of their inhomogeneity are given. As the region of indication 0-0-transition is situated at low intensity antistokes wings of spectra the sensitivity to inhomogeneity is high as to hindrance by impurities and measurement precision.
Vitaly Antonovich Tolkachev,
Chromophor Inhomogeneity Indication by Diffuse Vibronic Spectra, American Journal of Applied Chemistry.
Vol. 8, No. 5,
2020, pp. 121-125.
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
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V. A. Tolkachev (2017). Determination of 0-0-Transition Frequencies from Diffuse Vibronic Spectra. J. Appl. Spectrosc. 84, 668-673.
V. A. Tolkachev (2017). Position of 0-0-Transition Frequency in Diffuse Vibronic Spectrum. Dokl. National. Acad. Sci. Belarus 61, 50-55 (rus.).
V. A. Tolkachev (2018). Average Energies of Combining States and Purely Electronic Transition Frequencies in Vibronic Spectra. J. Appl. Spectrosc. 85, 845-849.
V. A. Tolkachev and A. P. Blokhin (2019). Extraction of Purely Electronic Transition Frequency and Chromophor Polymorphism from Diffuse Vibronic Spectra. Sci. J. Anal. Chem. 7, 76-82.
V. A. Tolkachev (2019). Zero-phonon Transition Frequency in Diffuse Electronic Spectra of Color Centers in Crystals and Glasses. J. Appl. Spectrosc. 86, 504-507, DOI 10.1007/s10812-019-00848-8.
V. A. Tolkachev (2018). Manifestation of Molecular Chromophor Polymorphism in Diffuse Vibronic Spectra. J. Appl. Spectrosc. 85, 220-224.
B. Andrianasolo, B. Champagnon, M. Ferrari, and N. Neuroth (1991). Nonlinear Effects in Microcrystalline Semiconductors. J. Lumin. 48-49, 306-308.
X. Song, G. Wang, X. Liu, F. Feng, J. Wang, L. Lou and W. Zhu (2013). Generation of Nitrogen-Vacancy Color Center in Nanodiamonds by High Temperature Annealing. Appl. Phys. Lett. 102, 133109.
V. A. Tolkachev (2020). Determining the Frequency of a Purely Electronic Transition from Optical Activity Spectra. J. Appl. Spectrosc. 87 (3), 525-530.
X. Yan, X. Cui and L. Li (2010). Synthesis of Large, Stable Colloidal Graphene Quantum Dots with Tunable Size. J. Amer. Chem. Soc. 132, 5944-5945.
H. Riesen, Ch. Wieber and S. Schumacher (2014). Optical Spectroscopy of Graphene Quantum Dots: The Case of C132. J. Phys. Chem. A 118, 5189-5195.
S. Zhu, J. Zhang, S. Tang, C. Qiao, L. Wang, H. Wang, X. Liu, B. Li, N. Yu, X. Wang, H. Sun and B. Yang (2012). Photoluminescence Mechanism in Graphene Quantum Dots: Quantum Confinement Effect and Surface/Edge State. Adv. Funct. Mater. 22, 4732-4740.
P. R. Sainz-Rozas, J. R. Isasi and G. Gonzalez-Gaitano (2005). Spectral and photopysical properties of 2-dibenzofuranol and its inclusion complexes with cyclodextrin. J. Photochem. Photoboil. A: Chemistry 173, 319-327.
E. L. Roberts, J. Dey and I. Warner. (1997). Excited-State Intramolecular Proton Transfer of 2-(2’-Hydroxyphenyl)-benzimidazole in Cyclodextrins and Binary Solvent Mixtures. J. Phys. Chem. A 101, 5296-5301.
D. Voet, W. B. Gratzer, R. A. Cox and P. Doty (1963) Absorption Spectra of Nucleotides, Polynucleotides, and Nucleic Acids in the Far Ultraviolet. Biopolymers 1, 193-208.
V. A. Tolkachev (2020). New Opportunities for Analytical Use of Optical Diffuse Electronic Absorption and Emission Spectra. International Journal of Innovative Studies in Sciences and Engineering Technology 6 (5) 6-9.
C. Zimmer, C. Marck, C. Schneider, D. Thiele, G. Luck, and W. Guschlbauer (1980). Magnetic Circular Dichroism Study of the Binding of Netropsin and Distamycin-A with DNA. Biochimica et Biophysica Acta 607, 232-246.
V. A. Tolkachev (2020). Determination of the Pure-electronic Transition from Diffuse Absorption or Emission Spectra at Low Temperatures. J. Appl. Spectrosc. 87 (6) (Zh. Prikl. Spektrosk. 87 (6) (rus.)). (in print).