H2S gas interaction with Pt(II)-containing polymetallaynes of selected chain length:: An XPS and EXAFS study

被引：11
作者：
Battocchio, Chiara [1 ,2 ,3 ]
Fratoddi, Ilaria [4 ]
Russo, Maria Vittoria [4 ]
Polzonetti, Giovanni [1 ,2 ,3 ]
机构：
[1] Univ Roma Tre, Dept Phys, I-00146 Rome, Italy
[2] Univ Roma Tre, Unita INSTM, I-00146 Rome, Italy
[3] Univ Roma Tre, CISDiC, I-00146 Rome, Italy
[4] Univ Roma La Sapienza, Dept Chem, I-00185 Rome, Italy
来源：
JOURNAL OF PHYSICAL CHEMISTRY A | 2008年 / 112卷 / 32期
关键词：
D O I：
10.1021/jp803119j
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The interaction between gaseous H2S and the surface of several metal-containing oligomers, investigated by emission and absorption spectroscopies, is presented and discussed. The polymetallayne trans-{Cl-[Pt(PBu3)(2)(C C-C6H4-C6H4-C C)](9)Pt(PBu3)(2)Cl} and related model molecules, i.e. the binuclear transition metal dialkynyl bridged Pt(II) square planar complex trans,trans-[ClPt(PBu3)(2)(C C-C6H4-C6H4 Pt(PBu3)(2)CI], the tetranuclear linear oligomer trans-[Cl-[Pt(PBu3)(2)(C C-C6H4-C6H4-C C)](3)Pt(PBu3)(2)Cl}, the tetranuclear cyclic oligomer cis- [Pt(PBu3)(2)(C C - C6H4-C6H4 -C C)](4), were exposed to hydrogen sulfide and then investigated by X-ray photoelectron (XPS) and X-ray absorption (XAS) spectroscopies, in order to shed light on the gas/polymer interaction associated to the sensing properties of these materials. XPS measurements evidenced the presence of S in the polymetallayne samples exposed to H2S, and the measured S2p binding energy values correlate with H2S adsorbed by means of sulfur atoms chemically bonded to metal atoms, owing to the formation of sulfur-containing adducts. XAS data analysis suggested a squarepyramidal geometry around the transition metal with H2S in the apical position for the pentacoordinated platinum units.
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页码：7365 / 7373
页数：9
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