Templated Atom-Precise Galvanic Synthesis and Structure Elucidation of a [Ag 24 Au(SR) 18 ] − Nanocluster

Handle URI:
http://hdl.handle.net/10754/623138
Title:
Templated Atom-Precise Galvanic Synthesis and Structure Elucidation of a [Ag 24 Au(SR) 18 ] − Nanocluster
Authors:
Bootharaju, Megalamane Siddaramappa ( 0000-0002-8276-6987 ) ; Joshi, Chakra Prasad; Parida, Manas R.; Mohammed, Omar F. ( 0000-0001-8500-1130 ) ; Bakr, Osman M. ( 0000-0002-3428-1002 )
Abstract:
Synthesis of atom-precise alloy nanoclusters with uniform composition is challenging when the alloying atoms are similar in size (for example, Ag and Au). A galvanic exchange strategy has been devised to produce a compositionally uniform [Ag24Au(SR)18]- cluster (SR: thiolate) using a pure [Ag25(SR)18]- cluster as a template. Conversely, the direct synthesis of Ag24Au cluster leads to a mixture of [Ag25-xAux(SR)18]-, x=1-8. Mass spectrometry and crystallography of [Ag24Au(SR)18]- reveal the presence of the Au heteroatom at the Ag25 center, forming Ag24Au. The successful exchange of the central Ag of Ag25 with Au causes perturbations in the Ag25 crystal structure, which are reflected in the absorption, luminescence, and ambient stability of the particle. These properties are compared with those of Ag25 and Ag24Pd clusters with same ligand and structural framework, providing new insights into the modulation of cluster properties with dopants at the single-atom level.
KAUST Department:
KAUST Solar Center (KSC); Physical Sciences and Engineering (PSE) Division
Citation:
Bootharaju MS, Joshi CP, Parida MR, Mohammed OF, Bakr OM (2015) Templated Atom-Precise Galvanic Synthesis and Structure Elucidation of a [Ag24Au(SR)18]−Nanocluster. Angewandte Chemie International Edition 55: 922–926. Available: http://dx.doi.org/10.1002/anie.201509381.
Publisher:
Wiley-Blackwell
Journal:
Angewandte Chemie International Edition
Issue Date:
27-Nov-2015
DOI:
10.1002/anie.201509381; 10.1002/ange.201509381
Type:
Article
ISSN:
1433-7851
Sponsors:
KAUST
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorBootharaju, Megalamane Siddaramappaen
dc.contributor.authorJoshi, Chakra Prasaden
dc.contributor.authorParida, Manas R.en
dc.contributor.authorMohammed, Omar F.en
dc.contributor.authorBakr, Osman M.en
dc.date.accessioned2017-04-13T11:50:56Z-
dc.date.available2017-04-13T11:50:56Z-
dc.date.issued2015-11-27en
dc.identifier.citationBootharaju MS, Joshi CP, Parida MR, Mohammed OF, Bakr OM (2015) Templated Atom-Precise Galvanic Synthesis and Structure Elucidation of a [Ag24Au(SR)18]−Nanocluster. Angewandte Chemie International Edition 55: 922–926. Available: http://dx.doi.org/10.1002/anie.201509381.en
dc.identifier.issn1433-7851en
dc.identifier.doi10.1002/anie.201509381en
dc.identifier.doi10.1002/ange.201509381en
dc.identifier.urihttp://hdl.handle.net/10754/623138-
dc.description.abstractSynthesis of atom-precise alloy nanoclusters with uniform composition is challenging when the alloying atoms are similar in size (for example, Ag and Au). A galvanic exchange strategy has been devised to produce a compositionally uniform [Ag24Au(SR)18]- cluster (SR: thiolate) using a pure [Ag25(SR)18]- cluster as a template. Conversely, the direct synthesis of Ag24Au cluster leads to a mixture of [Ag25-xAux(SR)18]-, x=1-8. Mass spectrometry and crystallography of [Ag24Au(SR)18]- reveal the presence of the Au heteroatom at the Ag25 center, forming Ag24Au. The successful exchange of the central Ag of Ag25 with Au causes perturbations in the Ag25 crystal structure, which are reflected in the absorption, luminescence, and ambient stability of the particle. These properties are compared with those of Ag25 and Ag24Pd clusters with same ligand and structural framework, providing new insights into the modulation of cluster properties with dopants at the single-atom level.en
dc.description.sponsorshipKAUSTen
dc.publisherWiley-Blackwellen
dc.subjectAlloysen
dc.subjectGalvanic exchangeen
dc.subjectGolden
dc.subjectSilveren
dc.subjectStructure determinationen
dc.titleTemplated Atom-Precise Galvanic Synthesis and Structure Elucidation of a [Ag 24 Au(SR) 18 ] − Nanoclusteren
dc.typeArticleen
dc.contributor.departmentKAUST Solar Center (KSC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalAngewandte Chemie International Editionen
kaust.authorBootharaju, Megalamane Siddaramappaen
kaust.authorJoshi, Chakra Prasaden
kaust.authorParida, Manas R.en
kaust.authorMohammed, Omar F.en
kaust.authorBakr, Osman M.en
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