title: Spectral and photophysical properties of 1,6-naphthyridine derivatives: a new class of compounds for nonlinear optics.
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.
authors.affiliation: National Centre for Ultrafast Processes, University of Madras, Chennai, India.
authors.forename: V K
authors.initials: VK
authors.lastname: Indirapriyadharshini
authors.forename: P
authors.initials: P
authors.lastname: Ramamurthy
authors.forename: V
authors.initials: V
authors.lastname: Raghukumar
authors.forename: V T
authors.initials: VT
authors.lastname: Ramakrishnan
mesh_terms: D055598:Chemical Phenomena; D002627:Chemistry, Physical; D009682:Magnetic Resonance Spectroscopy; D009287:Naphthyridines / Q000737:chemistry*; D055095:Optics and Photonics; D010777:Photochemistry; D013050:Spectrometry, Fluorescence; D013053:Spectrophotometry; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D009287:Naphthyridines