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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Luminescent complexes of silver(I) with pyridylbis(3-hexamethyleneiminyl thiosemicarbazone): Effect of the counterion on the nuclearity
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Luminescent complexes of silver(I) with pyridylbis(3-hexamethyleneiminyl thiosemicarbazone): Effect of the counterion on the nuclearity

机译:银(I)与吡啶基双(3-六亚甲基亚甲基硫代半碳zone)的发光络合物:抗衡离子对核的影响

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摘要

The reaction of pyridylbis(3-hexamethyleneiminyl thiosemicarbazone) (H _2Plhexim) with various silver(I) salts and metal-ligand ratios led to the isolation of different complexes of the formulae [Ag(NO _3)(H _2Plhexim)]·H _2O (1), [Ag _2(NO _3)(H _2Plhexim)(CH _3OH)](NO _3) (2), [Ag _2(ClO _4) _2(H _2Plhexim)] (3), [Ag(HPlhexim)]·xH _2O (4), [Ag(HPlhexim)] (4a), [Ag _2(Plhexim)(PPh _3) _4]·2MeOH (5) and [Ag _4(Plhexim) _2]·DMF (6). The complexes were fully characterized by elemental analysis, ESI mass spectrometry, IR and NMR (~1H, ~(31)P) spectroscopy. The structures of 4a, 5 and 6 were also identified by single crystal X-ray structure determination. The concentration dependence on the absorption spectra of the methanolic solutions indicates polymerization equilibria in the ground state in both the ligand and the complexes. While H _2Plhexim is essentially non-fluorescent, complexes 1-5 fluoresce more strongly by comparison. This fluorescent behavior is consistent with the monomeric or dimeric nature of the complexes.
机译:吡啶基双(3-六亚甲基亚甲基硫代半碳zone)(H _2Plhexim)与各种银(I)盐和金属配体比的反应导致分离出式[Ag(NO _3)(H _2Plhexim)]·H _2O的不同配合物(1),[Ag _2(NO _3)(H _2Plhexim)(CH _3OH)](NO _3)(2),[Ag _2(ClO _4)_2(H _2Plhexim)](3),[Ag(HPlhexim) ]·xH _2O(4),[Ag(HPlhexim)](4a),[Ag _2(Plhexim)(PPh _3)_4]·2MeOH(5)和[Ag _4(Plhexim)_2]·DMF(6)。通过元素分析,ESI质谱,IR和NMR(〜1H,〜(31)P)光谱对配合物进行了全面表征。还通过单晶X射线结构测定来鉴定4a,5和6的结构。浓度对甲醇溶液吸收光谱的依赖性表明在配体和配合物中基态的聚合平衡。尽管H _2Phehexim基本不发荧光,但相比之下,配合物1-5发出的荧光更强。这种荧光行为与复合物的单体或二聚体性质一致。

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