Related Experiment Video
Updated: Aug 20, 2026

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
Published on: May 29, 2018
Steady-state and time-resolved spectroscopic characteristics of mesoionic oxazolones solutions
Marilena Vasilescu1, F Dumitrascu, H Lemmetyinen
1Institute of Physical Chemistry, Romanian Academy, Splaiul Independentei 202, 77208 Bucharest, Romania. mvasilescu@chimfiz.icf.ro
Abstract:
Three new mesoionic oxazolo[3,2-b]pyridazin-2-one derivatives, in different solutions have been investigated by UV-Vis absorption, steady-state and time-resolved fluorescence methods. The effect of substituents on the extension of conjugation of the pi-electrons from mesoionic oxazolone has been evidenced by bathochromic shifts of the absorption and fluorescence maxima positions. The fluorescence decay data could be fitted to single-exponential or double-exponential function. The lifetime values are much higher in aprotic polar solvents and in the case of the derivatives that present an extension of the conjugation of pi-electrons. The properties of the compounds present a solvent dependence, being tested in micellar solutions as potential molecular probe "sensitive" to the environment polarity.
More Related Videos
09:33Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch
Published on: February 7, 2022
08:54Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
Published on: January 25, 2020
Related Concept Videos
UV–Vis Spectroscopy of Conjugated Systems
One of the factors influencing λmax is the extent of conjugation in the...
¹H NMR of Conformationally Flexible Molecules: Temporal Resolution
UV–Vis Spectroscopy: Molecular Electronic Transitions
Spectroscopy of Carboxylic Acid Derivatives
In the...
NMR Spectroscopy of Benzene Derivatives
¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR