Hidden components in aqueous "Gold-144' fractionated by PAGE: high resolution orbitrap ESI-MS identifies the Gold-102 and higher all-aromatic Au-pMBA cluster compounds

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dc.contributor.authorAlvarez, Marcos M.
dc.contributor.authorChen, Jenny
dc.contributor.authorPlascencia-Villa, German
dc.contributor.authorBlack, David M.
dc.contributor.authorGriffiths, Wendell P.
dc.contributor.authorGarzon, Ignacio L.
dc.contributor.authorJose-Yacaman, Miguel
dc.contributor.authorDemeler, Borries
dc.contributor.authorWhetten, Robert L.
dc.date.accessioned2021-10-15T02:39:48Z
dc.date.available2021-10-15T02:39:48Z
dc.date.issued2016
dc.descriptionAccepted author manuscripten_US
dc.description.abstractExperimental and theoretical evidence reveals the resilience and stability of the larger aqueous gold clusters protected with p-mercaptobenzoic acid ligands (pMBA) of composition Aun(pMBA)p or (n, p). The Au144(pMBA)60, (144, 60), or gold-144 aqueous gold cluster is considered special because of its high symmetry, abundance, and icosahedral structure as well as its many potential uses in material and biological sciences. Yet, to this date, direct confirmation of its precise composition and total structure remains elusive. Results presented here from characterization via high-resolution electrospray ionization mass spectrometry on an Orbitrap instrument confirm Au102(pMBA)44 at isotopic resolution. Further, what usually appears as a single band for (144, 60) in electrophoresis (PAGE) is shown to also contain the (130, 50), recently determined to have a truncated-decahedral structure, and a (137, 56) component in addition to the dominant (144, 60) compound of chiral-icosahedral structure. This finding is significant in that it reveals the existence of structures never before observed in all-aromatic water-soluble species while pointing out the path toward elucidation of the thermodynamic control of protected gold nanocrystal formation.en_US
dc.description.peer-reviewYesen_US
dc.identifier.citationAlvarez, M. M., Chen, J., Plascencia-Villa, G., Black, D. M., Griffiths, W. P., Garzon, I. L., Jose-Yacaman, M., Demeler, B., & Whetten, R. L. (2016). Hidden components in aqueous "Gold-144" fractionated by PAGE: High resolution orbitrap ESI-MS identifies the Gold-102 and higher all-aromatic Au-pMBA cluster compounds. Journal of Physical Chemistry B, 120(26), 6430-6438. https://doi.org/10.1021/acs.jpcb.6b04525en_US
dc.identifier.urihttps://hdl.handle.net/10133/6063
dc.language.isoen_USen_US
dc.publisherAmerican Chemical Societyen_US
dc.publisher.departmentDepartment of Chemistry and Biochemistryen_US
dc.publisher.facultyArts and Scienceen_US
dc.publisher.institutionUniversity of Texasen_US
dc.publisher.institutionThermoFisher Scientificen_US
dc.publisher.institutionUniversidad Nacional Autonoma de Mexicoen_US
dc.publisher.institutionUniversity of Texas Health Science Center at San Antonioen_US
dc.publisher.institutionUniversity of Lethbridgeen_US
dc.publisher.urlhttps://doi.org/10.1021/acs.jpcb.6b04525en_US
dc.subjectCluster chemistryen_US
dc.subjectGold cluster
dc.subjectCluster compounds
dc.subject.lcshChemical structure
dc.subject.lcshMass spectrometry
dc.subject.lcshGold
dc.subject.lcshMetal clusters
dc.titleHidden components in aqueous "Gold-144' fractionated by PAGE: high resolution orbitrap ESI-MS identifies the Gold-102 and higher all-aromatic Au-pMBA cluster compoundsen_US
dc.typeArticleen_US
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