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Photophysical Parameters, Excitation Energy Transfer, and Photoreactivity of 1,4-Bis(5-phenyl-2-oxazolyl)benzene (POPOP) Laser Dye
Joint Authors
Asiri, Abdullah M.
Shama, Sayed A.
El-Daly, Samy A.
Elbaradei, Bahgat Y.
El-Azim, Saleh A.
Elmekawey, Farouk M.
Source
International Journal of Photoenergy
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-04
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
The effect of solvents on the absorption and emission spectra of 1,4-bis(5-phenyl-2-oxazolyl)benzene (POPOP) laser dye has been studied in various solvents at 298 K.
A bathochromic shift was observed in absorption and fluorescence spectra upon increase of solvent polarity, which indicates that this transition is π-π*.
The ground and excited state dipole moments were calculated as 2.23 and 6.34 Debye, respectively.
The dye solution in MeOH, n-heptane, and methyl isobutyl ketone gives laser emission in the blue region upon excitation by a 337.1 nm nitrogen pulse; the gain coefficient and emission cross section as well as normalized photostability have been determined.
Excitation energy transfer from POPOP to rhodamine B and fluorescine was studied to improve the laser emission from these dyes.
Such an energy transfer dye laser system (ETDL) obeys a long range columbic energy transfer mechanism with a critical transfer distance, R0, of 25 and 33 Å and kq equal to 10.4×1012 and 26.2×1012 M−1 s −1 for the POPOP/RB and POPOP/fluorescine pair, respectively.
The POPOP dye is highly photostable in polar protic and polar aprotic solvents, while it displays photodecomposition in chloromethane solvent via formation of a contact ion pair.
The photochemical quantum yield and rate of photodecomposition depend on the electron affinity of solvent.
American Psychological Association (APA)
El-Daly, Samy A.& El-Azim, Saleh A.& Elmekawey, Farouk M.& Elbaradei, Bahgat Y.& Shama, Sayed A.& Asiri, Abdullah M.. 2012. Photophysical Parameters, Excitation Energy Transfer, and Photoreactivity of 1,4-Bis(5-phenyl-2-oxazolyl)benzene (POPOP) Laser Dye. International Journal of Photoenergy،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-473101
Modern Language Association (MLA)
El-Daly, Samy A.…[et al.]. Photophysical Parameters, Excitation Energy Transfer, and Photoreactivity of 1,4-Bis(5-phenyl-2-oxazolyl)benzene (POPOP) Laser Dye. International Journal of Photoenergy No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-473101
American Medical Association (AMA)
El-Daly, Samy A.& El-Azim, Saleh A.& Elmekawey, Farouk M.& Elbaradei, Bahgat Y.& Shama, Sayed A.& Asiri, Abdullah M.. Photophysical Parameters, Excitation Energy Transfer, and Photoreactivity of 1,4-Bis(5-phenyl-2-oxazolyl)benzene (POPOP) Laser Dye. International Journal of Photoenergy. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-473101
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-473101