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

作者：Han Semi; Jung Ok Sang; Lee Young A^*

来源：Transition Metal Chemistry, 2011, 36(7): 691-697.

DOI：10.1007/s11243-011-9521-z

Reaction of [AuCl(SMe2)] with NaL center dot 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)center dot(organic acid). The crystal structure of [Au(L)](2)center dot(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) a"<< and 2.7525(7) a"<<) exist, but interdinuclear interactions are weak (3.2551(8)-3.2733(8) a"<<). 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)center dot(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.

• 出版日期2011-10