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    Non-typical fluorescence studies of excited and ground state proton and hydrogen transfer

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    Type
    Article
    Authors
    Gil, Michał
    Kijak, Michał
    Piwonski, Hubert Marek cc
    Herbich, Jerzy
    Waluk, Jacek
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2017-03-01
    Permanent link to this record
    http://hdl.handle.net/10754/626976
    
    Metadata
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    Abstract
    Fluorescence studies of tautomerization have been carried out for various systems that exhibit single and double proton or hydrogen translocation in various environments, such as liquid and solid condensed phases, ultracold supersonic jets, and finally, polymer matrices with single emitters.We focus on less explored areas of application of fluorescence for tautomerization studies, using porphycene, a porphyrin isomer, as an example. Fluorescence anisotropy techniques allow investigations of self-exchange reactions, where the reactant and product are formally identical. Excitation with polarized light makes it possible to monitor tautomerization in single molecules and to detect their three-dimensional orientation. Analysis of fluorescence from single vibronic levels of jet-isolated porphycene not only demonstrates coherent tunneling of two internal protons, but also indicates that the process is vibrational mode-specific. Next, we present bifunctional proton donoracceptor systems, molecules that are able, depending on the environment, to undergo excited state single intramolecular or double intermolecular proton transfer. For molecules that have donor and acceptor groups located in separate moieties linked by a single bond, excited state tautomerization can be coupled to mutual twisting of the two subunits.
    Citation
    Gil M, Kijak M, Piwoński H, Herbich J, Waluk J (2017) Non-typical fluorescence studies of excited and ground state proton and hydrogen transfer. Methods and Applications in Fluorescence 5: 014007. Available: http://dx.doi.org/10.1088/2050-6120/aa5e29.
    Sponsors
    The work was supported by the grants DEC-2013/10/M/ST4/00069 and DEC-2011/02/A/ST5/00443 from the Polish National Science Centre. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. The authors have declared that no competing interests exist.
    Publisher
    IOP Publishing
    Journal
    Methods and Applications in Fluorescence
    DOI
    10.1088/2050-6120/aa5e29
    Additional Links
    http://iopscience.iop.org/article/10.1088/2050-6120/aa5e29/meta
    ae974a485f413a2113503eed53cd6c53
    10.1088/2050-6120/aa5e29
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division

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