Avhad, Kiran C. published the artcileViscosity induced emission of red-emitting NLOphoric coumarin morpholine-thiazole hybrid styryl dyes as FMRs: Consolidated experimental and theoretical approach, Safety of Morpholine-4-carbothioamide, the publication is Optical Materials (Amsterdam, Netherlands) (2018), 90-107, database is CAplus.
Four new coumarin hybrid styryl dyes are synthesized by condensing 4-(7-(diethylamino)-2-oxo-2H-chromen-3-yl)-2-morpholinothiazole-5-carbaldehyde with dicyanovinylene containing active methylene intermediates and their linear and non-linear optical properties are studied. The dye having dicyanovinylene-isophorone acceptor displayed a large Stokes shift of 3702-4795 cm-1 in non-polar to polar solvent resp. The dyes exhibit a good charge transfer characteristics and pos. emission solvatochromism (∼50 nm-72 nm) in non-polar to a polar solvent which is well supported by multi-linear regression anal. Viscosity induced enhancement study in ethanol/polyethylene glycol-400 system shows 2.71-6.78 fold increase in emission intensity. The intra and twisted-intramol. charge transfer (ICT-TICT) characteristics were established using emission solvatochromism, polarity plots, generalized Mullikan-Hush (GMH) anal. and optimized geometry. A dye having the highest charge transfer dipole moment relatively possess the maximum two-photon absorption cross-section area (KK-1 = 165-207 GM) which was established using theor. two-level model. The NLO properties have been investigated employing solvatochromic and computational methods and were found to be directly proportional to the polarity of the solvent. Z-scan results reveal that the dyes KK-1 and KK-2 possesses reverse saturable kind of behavior whereas KK-3 and KK-4 show saturable kind of behavior. From the exptl. and theor. data, these coumarin thiazole hybrid dyes can be considered as promising candidates for FMR and NLOphores.
Optical Materials (Amsterdam, Netherlands) published new progress about 14294-10-1. 14294-10-1 belongs to amides-buliding-blocks, auxiliary class Morpholine,Thiourea,Amine,Amide, name is Morpholine-4-carbothioamide, and the molecular formula is C5H10N2OS, Safety of Morpholine-4-carbothioamide.
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