Journal of Fluorescence

, Volume 26, Issue 6, pp 2063–2077 | Cite as

Indole-Based NLOphoric Donor-π-Acceptor Styryl Dyes: Synthesis, Spectral Properties and Computational Studies

  • Santosh Chemate
  • Nagaiyan Sekar


Donor-π- acceptor styryl chromophores based on indole core were synthesized by Knoevenagel condensation of N-ethyl indole-3-carbaldehyde and different active methylene compounds. The absorption and emission properties of these dyes in different solvents were studied. The dyes displayed a broad absorption maximum in the UV and visible region between 397 and 469 nm with FWHM, 50 to 75 nm. Due to the extended π – conjugated systems this styryl chromophores shows strong intramolecular charge transfer characteristics. The dyes showed solid state emission and emission in solid state was red shifted as compared to their emission in less polar solvents. Density Functional Theory [B3LYP/6–311 + G(d)] computations were used to correlate the structural, molecular, electronic and photo physical parameters of styryl dye with experimental study. Synthesized dyes were confirmed by using FT-IR, 1H NMR, 13C NMR and HRMS spectral analysis.


Indole-3-carbaldehyde Styryl Solid state fluorescence DFT 



Santosh Chemate (JRF/SRF) is thankful for fellowship from the Principal Scientific Adviser (PSA), Government of India.

Supplementary material

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© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Department of Dyestuff TechnologyInstitute of Chemical TechnologyMumbaiIndia

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