Indirapriyadharshini VK, Ramamurthy P, Raghukumar V, Ramakrishnan VT. Spectral and photophysical properties of 1,6-naphthyridine derivatives: a new class of compounds for nonlinear optics.
SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2002;
58:1535-1543. [PMID:
12166722 DOI:
10.1016/s1386-1425(01)00616-3]
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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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