Solvent effect on the spectra of methylene green and methylene blue

Solvent effect on the spectra of methylene green and methylene blue

This investigation focuses on dyes that differ only in the nitro substituent. The NO2 group leads to a strong hardening of the fluorescence at 298 K. In methylene green (MG) the excitation energy migrates to the system of triplet states. This nonradiative process causes the MG fuorescence absent or...

Full description

Bibliographic Details
Published in:Journal of fluorescence Vol. 33, № 2. P. 685-695
Other Authors: Tchaikovskaya, Olga N., Chaidonova, Vlada S., Bocharnikova, Elena N., Telminov, Evgenii N., Dmitrieva, Natalia G, Ezhov, Dmitry M.
Format: Article
Language:English
Subjects:
метиленовый синий
малахитовый зеленый
люминесценция
лазерно-индуцированная флуоресценция
статьи в журналах
Online Access:http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001008759
LEADER 02366nab a2200361 c 4500
001 koha001008759
005 20231101151722.0
007 cr |
008 231025|2023 xxu s a eng d
024 7 |a 10.1007/s10895-022-03074-2  |2 doi 
035 |a koha001008759 
040 |a RU-ToGU  |b rus  |c RU-ToGU 
245 1 0 |a Solvent effect on the spectra of methylene green and methylene blue  |c O. N. Tchaikovskaya, V. S. Chaidonova, E. N. Bocharnikova [et al.] 
336 |a Текст 
337 |a электронный 
504 |a Библиогр.: 20 назв. 
520 3 |a This investigation focuses on dyes that differ only in the nitro substituent. The NO2 group leads to a strong hardening of the fluorescence at 298 K. In methylene green (MG) the excitation energy migrates to the system of triplet states. This nonradiative process causes the MG fuorescence absent or too low compared to methylene blue (MB). Moreover, laser-induced fluorescence is completely absent for MG in the investigated solvents. However, at liquid nitrogen temperature, we recorded fluorescence for MG in ethanol 250 times higher than at room temperature and phosphorescence too. The intensity of the MB fluorescence band in ethanol at 77 K is 6 times higher than at room temperature. According to the results of this study, the lifetime in the excited state decreases in the following order: isopropanol > acetonitrile≈ethanol≈dimethyl sulfoxide > > water for MG and chloroform > acetonitrile≈ethanol≈dimethyl sulfoxide > > water≈isopropanol for MB. In addition, MG has phosphorescence in ethanol at 780 nm and in chloroform at 810 nm. 
653 |a метиленовый синий 
653 |a малахитовый зеленый 
653 |a люминесценция 
653 |a лазерно-индуцированная флуоресценция 
655 4 |a статьи в журналах 
700 1 |a Tchaikovskaya, Olga N. 
700 1 |a Chaidonova, Vlada S. 
700 1 |a Bocharnikova, Elena N. 
700 1 |a Telminov, Evgenii N. 
700 1 |a Dmitrieva, Natalia G 
700 1 |a Ezhov, Dmitry M. 
773 0 |t Journal of fluorescence  |d 2023  |g Vol. 33, № 2. P. 685-695  |x 1053-0509 
852 4 |a RU-ToGU 
856 4 |u http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001008759 
908 |a статья 
999 |c 1008759  |d 1008759 

Similar Items