Au sub(103)(SR) sub(45), Au sub(104)(SR) sub(45), Au sub(104)(SR) sub(46) and Au sub(105)(SR) sub(46) nanoclusters

High resolution ESI mass spectrometry of the "22 kDa" nanocluster reveals the presence of a mixture containing Au sub(103)(SR) sub(45), Au sub(104)(SR) sub(45), Au sub(104)(SR) sub(46), and Au sub(105)(SR) sub(46) nanoclusters, where R = -CH sub(2)CH sub(2)Ph. MALDI TOF MS data confirm the...

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Bibliographic Details
Published inNanoscale Vol. 5; no. 24; pp. 12082 - 12085
Main Authors Dass, Amala, Nimmala, Praneeth Reddy, Jupally, Vijay Reddy, Kothalawala, Nuwan
Format Journal Article
LanguageEnglish
Published 01.11.2013
Subjects
Composition effects
Crystal structure
Ligands
Mass spectrometry
Nanocomposites
Nanomaterials
Nanostructure
Shells
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Summary:High resolution ESI mass spectrometry of the "22 kDa" nanocluster reveals the presence of a mixture containing Au sub(103)(SR) sub(45), Au sub(104)(SR) sub(45), Au sub(104)(SR) sub(46), and Au sub(105)(SR) sub(46) nanoclusters, where R = -CH sub(2)CH sub(2)Ph. MALDI TOF MS data confirm the purity of the sample and a UV-vis spectrum shows minor features. Au sub(102)(SC sub(6)H sub( 5)COOH) sub(44), whose XRD crystal structure was recently reported, is not observed. This is due to ligand effects, because the 102 : 44 composition is produced using aromatic ligands. However, the 103-, 104- and 105-atom nanoclusters, protected by -SCH sub(2)CH sub(2)Ph and -SC sub(6)H sub(13) ligands, are at or near 58 electron shell closing.
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ISSN:2040-3364
2040-3372
DOI:10.1039/c3nr03872f