Encapsulation of lead sulfide molecular clusters into solid matrices. Structural analysis with x-ray absorption spectroscopy

Journal Article · Wed Jul 26 00:00:00 EDT 1989 · Inorganic Chemistry; (USA)

DOI:https://doi.org/10.1021/ic00314a009· OSTI ID:6985675

Moller, K; Bein, T ^[1]; Herron, N; Mahler, W; Wang, Ying ^[2]

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1. Univ. of New Mexico, Albuquerque (USA)
2. E.I. du Pont de Nemours and Co., Wilmington, DE (USA)

Molecular-size PbS species have been stabilized in the open-pore structure of zeolite Y and mordenite via ion exchange with Pb(II) and subsequent treatment with H{sub 2}S at 295 K. Detailed analysis of synchrotron x-ray absorption data of the Pb L{sub III}-edge shows that intrazeolite PbO{sub 2}(O{sub z} = zeolite oxygen) species in zeolite Y react with H{sub 2}S to form monomolecular S{sub 2}Pb(I{sub z}){sub 3} species that are still anchored to the zeolite framework. The intrazeolite PbS phase appears to be more ordered at high loading levels of lead in zeolite Y than at low loading levels. The coordination of Pb(II) and the structure of PbS in the mordenite host is less ordered but basically very similar to that of the monomolecular species in Y. Optical absorption data for these samples agree very well with the structural EXAFS results. Larger PbS clusters have been stabilized in 85% ethylene-15% methacrylic acid copolymer films by a similar preparation procedure. EXAFS data indicate that the reaction forms PbS clusters with several Pb coordination shells and that the conversion of PbS is a function of Pb(II) loading levels. 23 refs., 9 figs., 3 tabs.

• DOE Contract Number: AS05-80ER10742
• OSTI ID: 6985675
• Journal Information: Inorganic Chemistry; (USA), Journal Name: Inorganic Chemistry; (USA) Vol. 28:15; ISSN 0020-1669; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
CHALCOGENIDES
DATA
ELECTROMAGNETIC RADIATION
ENCAPSULATION
EXPERIMENTAL DATA
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IONIZING RADIATIONS
LEAD COMPOUNDS
LEAD SULFIDES
MATERIALS
MINERALS
MOLECULAR STRUCTURE
MORDENITE
NUMERICAL DATA
RADIATIONS
SILICATE MINERALS
SPECTROSCOPY
SULFIDES
SULFUR COMPOUNDS
X RADIATION
ZEOLITES