Synthesis and Optical Properties of a Dithiolate/Phosphine-Protected Au28 Nanocluster

Handle URI:
http://hdl.handle.net/10754/623917
Title:
Synthesis and Optical Properties of a Dithiolate/Phosphine-Protected Au28 Nanocluster
Authors:
Aljuhani, Maha A. ( 0000-0002-3449-7858 ) ; Bootharaju, Megalamane Siddaramappa ( 0000-0002-8276-6987 ) ; Sinatra, Lutfan ( 0000-0001-7034-7745 ) ; Basset, Jean-Marie ( 0000-0003-3166-8882 ) ; Mohammed, Omar F. ( 0000-0001-8500-1130 ) ; Bakr, Osman M. ( 0000-0002-3428-1002 )
Abstract:
While monothiols and simple phosphines are commonly exploited for size-controlled synthesis of atomically precise gold nanoclusters (NCs), dithiols or dithiol-phosphine combinations are seldom applied. Herein, we used a dithiol (benzene-1,3-dithiol, BDT) and a phosphine (triphenylphosphine, TPP) together as ligands and synthesized an atomically precise gold NC with the formula [Au28(BDT)4(TPP)9]2+. This NC exhibited multiple absorption features and a charge of +2, which are distinctly different from the reported all-thiolated [Au28(SR)20]0 NC (SR: monothiolate). The composition of [Au28(BDT)4(TPP)9]2+ NC was deduced from high-resolution electrospray ionization mass spectrometry (ESI MS) and it was further corroborated by thermogravimetric analysis (TGA). Differential pulse voltammetry (DPV) revealed a HOMO–LUMO gap of 1.27 eV, which is in good agreement with the energy gap of 1.3 eV obtained from its UV–vis spectrum. The successful synthesis of atomically precise, dithiol-protected Au28 NC would stimulate theoretical and experimental research into bidentate ligands as a new path for expanding the library of different metal NCs, which have so far been dominated by monodentate thiols.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)
Citation:
Aljuhani MA, Bootharaju MS, Sinatra L, Basset J-M, Mohammed OF, et al. (2017) Synthesis and Optical Properties of a Dithiolate/Phosphine-Protected Au28 Nanocluster. The Journal of Physical Chemistry C. Available: http://dx.doi.org/10.1021/acs.jpcc.6b10205.
Publisher:
American Chemical Society (ACS)
Journal:
The Journal of Physical Chemistry C
Issue Date:
17-Dec-2016
DOI:
10.1021/acs.jpcc.6b10205
Type:
Article
ISSN:
1932-7447; 1932-7455
Sponsors:
The work reported here was supported by KAUST.
Additional Links:
http://pubs.acs.org/doi/full/10.1021/acs.jpcc.6b10205
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorAljuhani, Maha A.en
dc.contributor.authorBootharaju, Megalamane Siddaramappaen
dc.contributor.authorSinatra, Lutfanen
dc.contributor.authorBasset, Jean-Marieen
dc.contributor.authorMohammed, Omar F.en
dc.contributor.authorBakr, Osman M.en
dc.date.accessioned2017-05-31T11:23:13Z-
dc.date.available2017-05-31T11:23:13Z-
dc.date.issued2016-12-17en
dc.identifier.citationAljuhani MA, Bootharaju MS, Sinatra L, Basset J-M, Mohammed OF, et al. (2017) Synthesis and Optical Properties of a Dithiolate/Phosphine-Protected Au28 Nanocluster. The Journal of Physical Chemistry C. Available: http://dx.doi.org/10.1021/acs.jpcc.6b10205.en
dc.identifier.issn1932-7447en
dc.identifier.issn1932-7455en
dc.identifier.doi10.1021/acs.jpcc.6b10205en
dc.identifier.urihttp://hdl.handle.net/10754/623917-
dc.description.abstractWhile monothiols and simple phosphines are commonly exploited for size-controlled synthesis of atomically precise gold nanoclusters (NCs), dithiols or dithiol-phosphine combinations are seldom applied. Herein, we used a dithiol (benzene-1,3-dithiol, BDT) and a phosphine (triphenylphosphine, TPP) together as ligands and synthesized an atomically precise gold NC with the formula [Au28(BDT)4(TPP)9]2+. This NC exhibited multiple absorption features and a charge of +2, which are distinctly different from the reported all-thiolated [Au28(SR)20]0 NC (SR: monothiolate). The composition of [Au28(BDT)4(TPP)9]2+ NC was deduced from high-resolution electrospray ionization mass spectrometry (ESI MS) and it was further corroborated by thermogravimetric analysis (TGA). Differential pulse voltammetry (DPV) revealed a HOMO–LUMO gap of 1.27 eV, which is in good agreement with the energy gap of 1.3 eV obtained from its UV–vis spectrum. The successful synthesis of atomically precise, dithiol-protected Au28 NC would stimulate theoretical and experimental research into bidentate ligands as a new path for expanding the library of different metal NCs, which have so far been dominated by monodentate thiols.en
dc.description.sponsorshipThe work reported here was supported by KAUST.en
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/full/10.1021/acs.jpcc.6b10205en
dc.titleSynthesis and Optical Properties of a Dithiolate/Phosphine-Protected Au28 Nanoclusteren
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalThe Journal of Physical Chemistry Cen
kaust.authorAljuhani, Maha A.en
kaust.authorBootharaju, Megalamane Siddaramappaen
kaust.authorSinatra, Lutfanen
kaust.authorBasset, Jean-Marieen
kaust.authorMohammed, Omar F.en
kaust.authorBakr, Osman M.en
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