Strong solvatochromic fluorescence from the intramolecular charge-transfer state created by excited-state
Jangwon Seo1, Sehoon Kim, Soo Young Park
1School of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea.
Abstract:
In this work, we report a peculiar positive solvatochromism in the keto emission of the acceptor-substituted 2-(2'-hydroxyphenyl)benzoxazoles (HBO), which originates from the excited-state intramolecular proton transfer (ESIPT) followed by the intramolecular charge transfer (ICT) and subsequent solvent relaxation. This transient evolution of enhanced ICT characteristic triggered by ESIPT, which is first observed in this work, is responsible for the novel concept of a fast hyperpolarizability modulator as well as the unique solvatochromic behavior.
More Related Videos
10:35Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
Published on: May 29, 2018
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
¹H NMR: Complex Splitting
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Molecular Spectroscopy: Absorption and Emission
UV–Vis Spectroscopy: Molecular Electronic Transitions
Chemical Shift: Internal References and Solvent Effects
The internal reference compound generally used in NMR spectroscopy is tetramethylsilane (TMS). TMS is preferred because it is chemically inert, soluble in NMR solvents, and easily removable. Also, the highly shielded methyl protons in TMS yield an intense...
Variables Affecting Phosphorescence and Fluorescence
