Solvent effects on the dipole moments and photo physical properties of laser dye
IR@NISCAIR: CSIR-NISCAIR, New Delhi - ONLINE PERIODICALS REPOSITORY (NOPR)
View Archive Info| Field | Value | |
| Title |
Solvent effects on the dipole moments and photo physical properties of laser dye
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| Creator |
Melavanki, R M
Muttannavar, V T Vaijayanthimala, S Patil, N R Naik, L R Kadadevarmath, J S |
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| Subject |
Solvatochromic shift method
Stoke’s shift Solvent polarity parameter Ground state dipole moments Excited state dipole moments Laser dye DFT |
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| Description |
749-754
The absorption and emission spectra of fluorescent laser dye namely, 4,4”’-bis-2-butyyloctyl-oxy)-P-quaterphenyl have been recorded at room temperature in solvents of different polarities. The exited state dipole moments (µ<sub>e</sub>) have been estimated from Lippert’s, Bakhshiev’s and Kawski-Chamma-Viallet’s equations using the variation of Stoke’s shift with the solvent dielectric constant and refractive index. The geometry of the molecule has been fully optimized and the µ<sub>g</sub> has also been calculated theoretically by Gaussian 03 software using B3LYP/6-31g* level of theory. The µ<sub>g</sub> and µ<sub>e</sub> have been calculated by means of solvatochromic shift method. It has been observed that µ<sub>e</sub> is higher than µ<sub>g</sub>, indicating a substantial redistribution of the π-electron densities in a more polar excited state for the selected laser dye. Further, the changes in the dipole moment (<img src='http://www.niscair.res.in/jinfo/delta.gif' border=0>µ) has been calculated both from solvatochromic shift method and microscopic empirical solvent polarity parameter (<i>E</i><img src='http://www.niscair.res.in/jinfo/nt.gif' border=0>) and values are compared. |
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| Date |
2018-10-16T10:21:26Z
2018-10-16T10:21:26Z 2018-10 |
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| Type |
Article
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| Identifier |
0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscair.res.in/handle/123456789/45250 |
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| Language |
en_US
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| Rights |
<img src='http://nopr.niscair.res.in/image/cc-license-sml.png'> <a href='http://creativecommons.org/licenses/by-nc-nd/2.5/in' target='_blank'>CC Attribution-Noncommercial-No Derivative Works 2.5 India</a>
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| Publisher |
NISCAIR-CSIR, India
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| Source |
IJPAP Vol.56(10) [October 2018]
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