Variations in electronic states of coumarin hexanethiolate-labeled i-Au²⁵ and bi-Au²⁵ clusters

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dc.contributor.authorMeola, Angela
dc.contributor.authorHondrogiannis, Nicole
dc.contributor.authorBrown, Pierce
dc.contributor.authorZhukovskyi, Maksym
dc.contributor.authorZheng, Zheng
dc.contributor.authorRosenzweig, Zeev
dc.contributor.authorReber, Keith
dc.contributor.authorDevadas, Mary Sajini
dc.date.accessioned2021-04-13T19:26:43Z
dc.date.available2021-04-13T19:26:43Z
dc.date.issued2019-09-20
dc.description.abstractAu₂₅(C₆H₁₄S)₁₈ - icosahedron and [Au₂₅(PPh)₁₀(C₆H₁₄S)₅Cl₂]²⁺ bi-icosahedron clusters were synthesized. Ligand exchange reactions were carried out with a new coumarin-derived fluorophore (Cou-SH) to label both clusters. Labeled and unlabeled Au²⁵ were compared and the changes in the electronic structure were determined. The labeled clusters showed marked changes in electronic states, as evidenced by the quenching in the UV region and enhancement in the near infrared. The quantum yield from Cou-SH decreased and the quantum yield from the labeled Au²⁵ increased. Second, the authors observed changes in the electrochemical band gap.en_US
dc.description.sponsorshipWe are grateful to Dr. Masaru Kuno for allowing us to use the TEM at the University of Notre Dame and ThermoFisher Corporation. We also thank Mr. Stephen Blama for his help with EDS. This work was supported by NSF MRI-1626326, and Towson University Fisher Chair, Fisher General Endowment, Faculty Development Research Committee, Fisher College Undergraduate Research, and Graduate Student Association Grants.en_US
dc.description.urihttps://link.springer.com/article/10.1557/mrc.2019.113en_US
dc.format.extent9 pagesen_US
dc.genrejournal articles postprintsen_US
dc.identifierdoi:10.13016/m2ksn3-kixy
dc.identifier.citationMeola, Angela; Hondrogiannis, Nicole; Brown, Pierce; Zhukovskyi, Maksym; Zheng, Zheng; Rosenzweig, Zeev; Reber, Keith; Devadas, Mary Sajini; Variations in electronic states of coumarin hexanethiolate-labeled i-Au²⁵ and bi-Au²⁵ clusters; MRS Communications volume 9, 992–1000(2019); https://link.springer.com/article/10.1557/mrc.2019.113en_US
dc.identifier.urihttps://doi.org/10.1557/mrc.2019.113
dc.identifier.urihttp://hdl.handle.net/11603/21320
dc.language.isoen_USen_US
dc.publisherSpringer Natureen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Chemistry & Biochemistry Department Collection
dc.relation.ispartofUMBC Student Collection
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleVariations in electronic states of coumarin hexanethiolate-labeled i-Au²⁵ and bi-Au²⁵ clustersen_US
dc.typeTexten_US

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