Jump to main content
Jump to site search


Proton transfer triggered proton transfer: a self-assisted twin excited state intramolecular proton transfer

Author affiliations

Abstract

The double excited state intramolecular proton transfer (ESIPT) of 3,5-bis(2-hydroxyphenyl)-1H-1,2,4-triazole (bis-HPTA), a molecule possessing two intramolecular hydrogen bonded donor–acceptor pairs, has been investigated. The molecule undergoes not only a single ESIPT, but also a rare twin ESIPT. The most interesting fact is that initially, only one acid–base pair is ESIPT active and the other pair is ESIPT inactive. The first proton transfer triggers the proton transfer in the second acid–base pair by creating appropriate conditions. This new type of sequential proton transfer is labeled as ‘proton transfer triggered proton transfer’ (PTTPT). The PTTPT has been demonstrated by steady state and time resolved fluorescence techniques. It was further substantiated by theoretical data and using a chemically modified system 3-(2-hydroxyphenyl)-5-(2-methoxyphenyl)-1H-1,2,4-triazole.

Graphical abstract: Proton transfer triggered proton transfer: a self-assisted twin excited state intramolecular proton transfer

Back to tab navigation

Supplementary files

Publication details

The article was received on 16 Jun 2018, accepted on 24 Sep 2018 and first published on 24 Sep 2018


Article type: Paper
DOI: 10.1039/C8CP03835J
Citation: Phys. Chem. Chem. Phys., 2018, Advance Article
  •   Request permissions

    Proton transfer triggered proton transfer: a self-assisted twin excited state intramolecular proton transfer

    S. Sahu, M. Das, A. K. Bharti and G. Krishnamoorthy, Phys. Chem. Chem. Phys., 2018, Advance Article , DOI: 10.1039/C8CP03835J

Search articles by author

Spotlight

Advertisements