title: Synthesis, characterization and fluorescence studies of 3,5-diaryl substituted 2-pyrazolines.
abstract: A series of 2-pyrazolines have been synthesized from α, β unsaturated ketones and hydrazine hydrate with acetic/formic acid in ethanol/DMSO. The structures of 2-pyrazolines have been established by spectroscopic techniques i.e. UV, IR, (1)H NMR, (13)C NMR and micro element analysis. Fluorescence spectra were recorded in the solution at fixed concentration and same excitation wavelength at 290 nm. The absorption band positions of all the compounds broadly lie between 280 and 336 nm and fluorescence band positions in the range between 300 and 370 nm, the near ultraviolet region.
authors.affiliation: Department of Chemistry, HNB Garhwal University, Srinagar (Garhwal), Uttarakhand, India. geeta_joshi4f54@rediffmail.com
authors.forename: Geeta
authors.initials: G
authors.lastname: Joshi nee Pant
authors.forename: Pramod
authors.initials: P
authors.lastname: Singh
authors.forename: B S
authors.initials: BS
authors.lastname: Rawat
authors.forename: M S M
authors.initials: MS
authors.lastname: Rawat
authors.forename: G C
authors.initials: GC
authors.lastname: Joshi
mesh_terms: D007659:Ketones / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011720:Pyrazoles / Q000138:chemical synthesis* / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013055:Spectrophotometry, Infrared
chemical_list: D007659:Ketones; D011720:Pyrazoles