作者:J M Clark、G Kociok-Köhn、N J Harnett、M S Hill、R Hill、K C Molloy、H Saponia、D Stanton、A Sudlow
DOI:10.1039/c1dt10273g
日期:——
Six lead xanthate adducts Pb(S2COR)2.L [R = Et, nBu, L = bipy, TMEDA (tetramethylethylenediamine), PMDETA (pentamethyldiethylenetriamine)] have been synthesised and the structures of all, save Pb(S2COBun)2.TMEDA (4) which is an oil, determined. Pb(S2COEt)2.TMEDA (3) is seven-coordinate at lead through three chelating ligands and one weak intermolecular Pb‥S interaction. Both Pb(S2COR)2.bipy [R = Et (1), nBu (2)] are dimers in which one xanthate is terminal and the other μ2 bridging at each sulphur, generating an eight-coordinate lead when the bipy donor is included. Both Pb(S2COR)2.PMDETA [R = Et (5), nBu (6)] are seven-coordinate at lead by virtue of two bidentate chelating xanthate ligands and a tridentate PMDETA; there are no intermolecular interactions. Trends in the 207Pb NMR chemical shifts mirror the changes in the intramolecular coordination number across the series. Pb(S2COEt)2.TMEDA (3) has been used to deposit PbS films on glass, Mo-coated glass and Si by AACVD. Pb(S2COEt)2 also generated PbS nanocubes when decomposed under an autogenerated pressure.
已经合成了六个铅黄药加合物Pb(S2COR)2.L [R = Et, nBu, L = bipy, TMEDA (四甲基乙二胺), PMDETA (五甲基二乙烯三胺)],除Pb(S2COBun)2.TMEDA (4)(一种油)外,所有化合物的结构都已确定。Pb(S2COEt)2.TMEDA (3)通过三个螯合配体和一个微弱的分子间Pb‥S相互作用,在铅上形成七配位。Pb(S2COR)2.bipy [R = Et (1), nBu (2)]都是二聚体,其中一种黄药是末端,另一种在每个硫上以μ2键合,当包含bipy供体时,形成八配位铅。Pb(S2COR)2.PMDETA [R = Et (5), nBu (6)]通过两个二齿螯合黄药配体和一个三齿PMDETA在铅上形成七配位;没有分子间相互作用。207Pb NMR化学位移的趋势反映了整个系列中分子内配位数的变化。Pb(S2COEt)2.TMEDA (3)已被用于通过AACVD在玻璃、Mo涂层玻璃和Si上沉积PbS薄膜。Pb(S2COEt)2在