Excited state proton transfer effect of 7-hydroxyquinoline in dimethyl sulfoxide solvent

doi:10.1007/BF03034027

Paper

Excited state proton transfer effect of 7-hydroxyquinoline in dimethyl sulfoxide solvent

Published Mar 1, 2006 · Yang-xue Guo, Xiang-ping Li, Jia-jin Zheng

Optoelectronics Letters

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2

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Abstract

Abstract7-hydroxyquinoline (7-HQ) is a kind of organic molecule with excited state proton transfer (ESPT) effect, and can be used as the material for all optical switching. This optical switching takes place via the ESPT effect depending on its intermolecular hydrogen bond formed with the solvent, and can have the effect of all optical switching. 7-HQ can not form intermolecular hydrogen bond with dimethyl sulfoxide (DMSO), so 7-HQ in DMSO solution cannot display the ESPT effect. However, after the solution was radiated by an UV laser, we found that 7-HQ could have ESPT effect. This phenomenon is reported and the mechanism is investigated for the first time in this paper.

Study Snapshot

7-hydroxyquinoline can exhibit the excited state proton transfer effect in dimethyl sulfoxide solvent when radiated by an UV laser, despite its inability to form intermolecular hydrogen bonds with DMSO.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Paper

Excited state proton transfer effect of 7-hydroxyquinoline in dimethyl sulfoxide solvent

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References

Probing the Threshold to H Atom Transfer Along a Hydrogen-Bonded Ammonia Wire

Excited-state H atom transfer along a hydrogen-bonded ammonia wire occurs with a reaction threshold of 200 wave numbers, indicating close coupling between proton and electron movements.

Optical switching of 2-(2′-hydroxyphenyl) benzoxazole in different solvents

The optical switching and beam deflection effects of 2-(2′-hydroxyphenyl) benzoxazole in different solvents are due to the change in refractive index caused by the excited-state intramolecular proton-transfer effect, making it an excellent material for high-speed optical switching.

EFFECT OF SOLVENT ON NONLINEAR REFRACTION INDEX OF 7-HYDROXYQUINOLINE

The nonlinear refraction index of 7-hydroxyquinoline in different solvents is influenced by the interaction between 7-hydroxyquinoline and solvent molecules via H-bond.

The mechanism of the proton transfer: an outline.

The quantum-mechanical theory of charge transfer reactions explains proton transfer through classical medium reorganization and quantum-mechanical underbarrier transition, influencing kinetic isotope effect and enzymatic reactions.

Study on dynamic optical nonlinearities of excited state proton transfer in ethanol solution of 7-hydroxyquinoline

The pump-probe method reveals that 7-hydroxyquinoline exhibits molecular hyperpolarizability and lifetimes of 1.30.21031, 8.01.01031, and 5.80.81030 esu in the enol form ground state,

Citations

Concerted and asynchronous mechanism of ground state proton transfer in alcohol mediated 7-hydroxyquinoline

Alcohol-mediated 7-hydroxyquinoline complex undergoes concerted and asynchronous ground state proton transfer, which can be accelerated by more acidic alcohol, and is in agreement with experimental conclusions.

Excited state intramolecular proton transfer in 3-hydroxychromone: a DFT-based computational study

Intramolecular proton transfer in 3-hydroxychromone is not viable in the ground state, but exists in the excited state, with HOMO and LUMO electron densities playing a role.