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    13C or Not 13C: selective synthesis of asymmetric carbon-13-labeled platinum(II) cis-acetylides.

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    Authors
    Archer, Stuart A.
    Keane, Theo cc
    Delor, Milan cc
    Meijer, Anthony J. H. M. cc
    Weinstein, Julia A. cc
    Affiliation
    University of Sheffield
    Issue Date
    2016-08-09
    
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    Abstract
    Asymmetric isotopic labeling of parallel and identical electron- or energy-transfer pathways in symmetrical molecular assemblies is an extremely challenging task owing to the inherent lack of isotopic selectivity in conventional synthetic methods. Yet, it would be a highly valuable tool in the study and control of complex light-matter interactions in molecular systems by exclusively and nonintrusively labeling one of otherwise identical reaction pathways, potentially directing charge and energy transport along a chosen path. Here we describe the first selective synthetic route to asymmetrically labeled organometallic compounds, on the example of charge-transfer platinum(II) cis-acetylide complexes. We demonstrate the selective 13C labeling of one of two acetylide groups. We further show that such isotopic labeling successfully decouples the two ν(C≡C) in the mid-IR region, permitting independent spectroscopic monitoring of two otherwise identical electron-transfer pathways, along the 12C≡12C and 13C≡13C coordinates. Quantum-mechanical mixing leads to intriguing complex features in the vibrational spectra of such species, which we successfully model by full-dimensional anharmonically corrected DFT calculations, despite the large size of these systems. The synthetic route developed and demonstrated herein should lead to a great diversity of asymmetric organometallic complexes inaccessible otherwise, opening up a plethora of opportunities to advance the fundamental understanding and control of light-matter interactions in molecular systems.
    Citation
    Archer, S. A. et al. (2016) ‘13C or Not 13C: selective synthesis of asymmetric carbon-13-labeled platinum(II) cis-acetylides’, Inorganic Chemistry, 55 (17), pp. 8251-8253. doi: 10.1021/acs.inorgchem.6b01287
    Publisher
    American Chemical Society
    Journal
    Inorganic Chemistry
    URI
    http://hdl.handle.net/10545/623050
    DOI
    10.1021/acs.inorgchem.6b01287
    Additional Links
    http://pubs.acs.org/doi/10.1021/acs.inorgchem.6b01287
    Type
    Article
    Language
    en
    ISSN
    0020-1669
    EISSN
    1520-510X
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.inorgchem.6b01287
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