Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Volume 47 , Issue 9
Showing 1-44 articles out of 44 articles from the selected issue
Highlight Review
  • Julien Massue, Denis Jacquemin, Gilles Ulrich
    2018 Volume 47 Issue 9 Pages 1083-1089
    Published: September 05, 2018
    Released: September 05, 2018
    JOURNALS RESTRICTED ACCESS

    Excited-State Intramolecular Proton Transfer (ESIPT)-capable emitters have been in the limelight in the past few years owing to their atypical photophysical features paving the way to the engineering of innovative applications. ESIPT emission originates from a proton transfer occurring in the electronic excited-state which can be partially frustrated by multiple factors leading to finely tunable dual emission profiles that are highly dependent on the physical properties of the environment. Moreover, in specific cases, stable deprotonated species can be spectroscopically observed. This highlight review focuses on recent developments in the field of dual and triple emissive ESIPT emitters with an emphasis on the influence of chemical substitution on the frustration of the proton transfer process, as well as other beneficial parameters such as solvatation, crystallization and external stimuli. Theoretical aspects and in particular ab initio calculations of the excited-state energies of the various tautomers are discussed as well.

    Excited-State Intramolecular Proton Transfer (ESIPT)-capable emitters have been in the limelight in the past few years owing to their atypical photophysical features paving the way to the engineering of innovative applications. ESIPT emission originates from a proton transfer occurring in the electronic excited-state which can be partially frustrated by multiple factors leading to finely tunable dual emission profiles that are highly dependent on the physical properties of the environment. Moreover, in specific cases, stable deprotonated species can be spectroscopically observed. This mini-review highlights recent developments in the field of dual and triple emissive ESIPT emitters with an emphasis on the influence of chemical substitution on the frustration of the proton transfer process, as well as other beneficial parameters such as solvatation, crystallization and external stimuli. Theoretical aspects and in particular ab initio calculations of the excited-states energies of the various tautomers are discussed as well. Fullsize Image
     
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Editor’s Choice
  • Takayuki Miyamae, Haruhito Kato, Masaru Kato
    2018 Volume 47 Issue 9 Pages 1139-1142
    Published: September 05, 2018
    Released: September 05, 2018
    JOURNALS RESTRICTED ACCESS

    We investigated the molecular composition of the surface of beer and the orientations of these molecules on the beer surface using sum-frequency generation spectroscopy. By measuring the representative substances contained in beer, it was shown that hop-derived iso-α-acids and isoxanthohumol exist on the beer surface. Furthermore, these hop-derived molecules significantly contribute to the stability of beer foam by forming surface-active species with hydrophobic proteins on the beer surface.

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