Show simple item record Alvarez, Marcos M. Chen, Jenny Plascencia-Villa, German Black, David M. Griffiths, Wendell P. Garzon, Ignacio L. Jose-Yacaman, Miguel Demeler, Borrie Whetten, Robert L. 2021-10-15T02:39:48Z 2021-10-15T02:39:48Z 2016
dc.identifier.citation Alvarez, 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. en_US
dc.description Accepted author manuscript en_US
dc.description.abstract Experimental 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.language.iso en_US en_US
dc.publisher American Chemical Society en_US
dc.subject Cluster chemistry en_US
dc.subject Gold cluster
dc.subject Cluster compounds
dc.subject.lcsh Chemical structure
dc.subject.lcsh Mass spectrometry
dc.subject.lcsh Gold
dc.subject.lcsh Metal clusters
dc.title 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 en_US
dc.type Article en_US
dc.publisher.faculty Arts and Science en_US
dc.publisher.department Department of Chemistry and Biochemistry en_US
dc.description.peer-review Yes en_US
dc.publisher.institution University of Texas en_US
dc.publisher.institution ThermoFisher Scientific en_US
dc.publisher.institution Universidad Nacional Autonoma de Mexico en_US
dc.publisher.institution University of Texas Health Science Center at San Antonio en_US
dc.publisher.institution University of Lethbridge en_US
dc.publisher.url en_US

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