129287-13-4Relevant academic research and scientific papers
Luminescence feature of new 3,6-di(thiazolidin-5-one-2-yl)-carbazole derivative: synthesis, photophysical properties, density functional theory studies, and crystal shape effect
Bawazeer, Tahani M.,Althagafi, Ismail,Morad, Moataz,Munshi, Alaa M.,Bayazeed, Abrar A.,Alharbi, Arwa,El-Metwaly, Nashwa
, p. 904 - 913 (2021)
A new carbazole chromophore conjugated with substituted thiazolidine-4-one (CzPT) was synthesized by applying the Knoevenagel reaction between 3,6-diformyl-N-hexylcarbazole and ethyl 2-aceto-2-(5-oxo-3-phenylthiazolidin-2-ylidene)acetate. The chemical structure of the new derivative (CzPT) was elucidated by spectral studies. The CzPT absorption spectra in different solvents exhibited a red shift for λmax by increasing solvent polarity. Bands at 430–474 nm appeared and were attributed to intramolecular charge transfer with high π–π* characteristics. CzPT fluorescence spectra exhibited a red shift after increasing the solvent polarity. To understand the Stokes' shift ((Formula presented.) behaviour of the CzPT derivative referring to the polarity of solvents, Lippert–Mataga and linear solvation-energy relationship (LSER) models were employed in which the LSER exhibited respectable results compared with Lippert–Mataga (r2 = 0.9707). Moreover, time-dependent density functional theory absorption spectra in hexane and dimethylformamide showed that λmax had a major contribution in the highest occupied molecular orbital to lowest unoccupied molecular orbital transition in both solvents. In addition, the reduced uniformity of crystal features may lead to dislocation or anomalous arrangement of crystals with irregular spacing, which automatically enhances the optical properties of such crystals.
One-Pot Synthesis of Polyfunctionally Substituted 2,3-Dihydrothiazoles and Thiazolidinones
Mohareb, Rafat M.,Sherif, Sherif M.,Abdel-Aal, Fatma A. M.,Sayed, Nadia I. A.
, p. 1143 - 1146 (2007/10/02)
The reaction of phenyl isothiocyanate with the active methylene reagents 1a-e gives the nonisolable 1:1 adducts 2a-e.The latter react with α-halogenated compounds, e. g. phenacyl bromide, bromoacetyl bromide, chloroacetone, chloroacetonitrile and some hydrazonoyl halides to give the corresponding polyfunctionally substituted 2,3-dihydrothiazoles or thiazolidinone ring system.
