Spectral and photophysical properties of 1,6-naphthyridine derivatives: a new class of compounds for nonlinear optics |
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Authors: | Indirapriyadharshini V K Ramamurthy P Raghukumar V Ramakrishnan V T |
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Institution: | National Centre for Ultrafast Processes, University of Madras, Chennai, India. |
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Abstract: | 1,6-Naphthyridines are a class of compounds that exhibit second harmonic generation on excitation with a Nd-YAG laser (1064 nm). Solvatochromism has been used to estimate enhancement in the dipole moments on excitation and the values of first-order hyperpolarizability, beta. Photophysical studies on the title compounds show that they have a fluorescence lifetime of about 10 ns and fluorescence quantum yield of approximately 0.05-0.1 in different solvents. Kurtz powder method has been used to find the NLO efficiency of the compounds with reference to urea. |
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