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Journal of Fluorescence

, Volume 29, Issue 5, pp 1201–1211 | Cite as

Synthesis, Characterization, Optical, Electrochemical and Current-Voltage Characteristics of Coumarin Dyes

  • K. V. Basavarajappa
  • Y. Arthoba NayakaEmail author
  • R. O. Yathisha
  • P. Manjunatha
ORIGINAL ARTICLE
  • 132 Downloads

Abstract

A series of coumarin dyes having common acceptor and pi spacer with different donors were synthesized and characterized by spectroscopic techniques. The TiO2 nanoparticle has been synthesized by sol-gel method and characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. Photophysical and electrochemical properties have been investigated. The band gap, molar absorption coefficient and energies of frontier molecular orbitals (FMO) have been calculated. The results showed that an electron releasing group helps in tuning the band gap. The geometry optimization and energies of FMO were obtained by density functional theory calculations. The calculated global chemical parameters help in understanding the intrinsic donor-acceptor properties of the synthesized dye molecules. The result of current-voltage characteristics showed good photocurrent response under illumination condition.

Keywords

Coumarin Band gap I-V characteristics TiO2 

Notes

Acknowledgments

Authors are thankful to UGC-SWRO and Department of Collegiate Education-Bangalore for selecting under UGC-FIP scheme. The authors are also thankful to DST (SERB), New Delhi, UGC New Delhi, for providing the instrumental facility.

Supplementary material

10895_2019_2436_MOESM1_ESM.docx (959 kb)
ESM 1 (DOCX 959 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • K. V. Basavarajappa
    • 1
    • 2
  • Y. Arthoba Nayaka
    • 1
    Email author
  • R. O. Yathisha
    • 1
  • P. Manjunatha
    • 1
  1. 1.Department of PG Studies and Research in ChemistryKuvempu UniversityShankaraghattaIndia
  2. 2.Department of ChemistryGovernment First Grade CollegeDavanagereIndia

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