A New Candidate Laser Dye Based 1,4-Bis[β-(2-Naphthothiazolyle)Vinyl]Benzene. Spectroscopic Behavior, Laser Parameters and Excitation Energy Transfer

Journal of Fluorescence
Abeer N Al-Romaizan, Mahmoud A Hussein

Abstract

A new candidate laser dye based 1,4-bis[β-(2-naphthothisolyl) vinyl] benzene (BNTVB) were prepared, and characterized in various organic solvents. The center polarity is less sensitive than electronic absorption. A red shift was noticed in the fluorescence spectra (ca. 40 nm) with increment in the solvent's polarity, this means that BNTVB's polarity appreciates upon excitation. The dipole moment of ground state (μg) and the excited singlet state dipole moment (μe) are determined from Kawski - Chamma and Bakshiev-Viallet equations using the disparity of Stokes shift with solvent polarity function of ε (dielectric constant) and n (refractive index) of the solvent. The result was found to be 0.019D and 5.13D for ground and exited state, in succession. DFT/TD-DFT manners were used to understand the electronic structures and geometric of BNTVB in other solvents. The experimental and theoretical results showed a good agreement. The photochemical quantum yield (Фc) of BNTVB was calculated in variable organic reagents such as Dioxane, CHCl3, EtOH and MeOH at room temperature. The values of φc were calculated as 2.3 × 10-4, 3.3 × 10-3, 9.7 × 10-5 and 6.2 × 10-5 in Dioxane, CHCl3, EtOH and MeOH, respectively. The dye solutions (2 × 10-4 ...Continue Reading

References

Sep 13, 1991·Biochimica Et Biophysica Acta·L M Heilmeyer
Aug 22, 2000·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·S M Al-HazmyE Z Ebeid
Feb 24, 2001·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·S KumarR C Rastogi
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Sep 13, 2005·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Janina KabatcJerzy Paczkowski

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Methods Mentioned

BETA
Fluorescence
FRET

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Gaussian
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