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Adduct effects on structure and luminescence in a series of new dithiocarbamatogold(I) complexes

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Abstract

Reaction of [AuCl(SMe2)] with NaL·H2O (L = ethyl(pyridine-4-yl methyl)dithiocarbamate (epdtc) or methyl(2-(pyridin-2-yl)ethyl)dithiocarbamate (mpdtc)) affords a series of neutral dinuclear gold(I) complexes bridged by each dithiocarbamate ligand, [Au(L)]2. The successive reaction of [Au(L)]2 with organic acids such as isophthalic acid (m-pa) and maleic acid (ma) produces 1:1 adducts, [Au(L)]2·(organic acid). The crystal structure of [Au(L)]2·(m-pa) is a 1D polymer formed via hydrogen bonds between the free pyridyl and the carboxylic acid moiety. For the dinuclear moiety, strong intradinuclear aurophilic interactions (Au(I)–Au(I) = 2.7783(8) Å and 2.7525(7) Å) exist, but interdinuclear interactions are weak (3.2551(8)–3.2733(8) Å). The dinuclear gold(I) complexes, [Au(epdtc)]2 and [Au(mpdtc)]2, show a bright luminescence at 562.5 and 552.0 nm in solid state, respectively, but their organic acid adducts, [Au(L)]2·(organic acid), have no luminescent properties. This dramatic difference in properties between the gold(I) complexes and their adducts may be ascribed to the weakness of the internuclear Au(I)–Au(I) interaction including crystal packing.

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Acknowledgments

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (204-2005-1-C00037 and 2009-0070384) and Chonbuk National University in 2009.

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Authors and Affiliations

  1. Department of Chemistry and Research Institute of Physics and Chemistry, Chonbuk National University, Jeonju, 561-756, Korea

    Semi Han & Young-A Lee

  2. Department of Chemistry, Pusan National University, Pusan, 609-735, Korea

    Ok-Sang Jung

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  1. Semi Han
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  2. Ok-Sang Jung
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Correspondence to Young-A Lee.

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Han, S., Jung, OS. & Lee, YA. Adduct effects on structure and luminescence in a series of new dithiocarbamatogold(I) complexes. Transition Met Chem 36, 691–697 (2011). https://doi.org/10.1007/s11243-011-9521-z

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  • DOI: https://doi.org/10.1007/s11243-011-9521-z

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