Search Results - "Dass, Amala"

Aromatic Thiolate-Protected Series of Gold Nanomolecules and a Contrary Structural Trend in Size Evolution by Sakthivel, Naga Arjun, Dass, Amala

“…Conspectus Thiolate-protected gold nanoparticles (AuNPs) are a special class of nanomaterials that form atomically precise NPs with distinct numbers of Au…”
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Nano-scaling law: geometric foundation of thiolated gold nanomolecules by Dass, Amala

“…Thiolated gold nanomolecules show a power correlation between the number of gold atoms and the thiolate ligands with a 2/3 scaling similar to Platonic and…”
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First enantioseparation and circular dichroism spectra of Au38 clusters protected by achiral ligands by Dolamic, Igor, Knoppe, Stefan, Dass, Amala, Bürgi, Thomas

“…Bestowing chirality to metals is central in fields such as heterogeneous catalysis and modern optics. Although the bulk phase of metals is symmetric, their…”
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Crystal Structure of Faradaurate-279: Au279(SPh‑tBu)84 Plasmonic Nanocrystal Molecules by Sakthivel, Naga Arjun, Theivendran, Shevanuja, Ganeshraj, Vigneshraja, Oliver, Allen G, Dass, Amala

“…We report the discovery of an unprecedentedly large, 2.2 nm diameter, thiolate protected gold nanocrystal characterized by single crystal X-ray crystallography…”
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X-ray Crystal Structure and Theoretical Analysis of Au25-xAgx(SCH2CH2Ph)18(-) Alloy by Kumara, Chanaka, Aikens, Christine M, Dass, Amala

“…The atomic arrangement of Au and Ag atoms in Au25-xAgx(SR)18 was determined by X-ray crystallography. Ag atoms were selectively incorporated in the 12 vertices…”
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Au99(SPh)42 Nanomolecules: Aromatic Thiolate Ligand Induced Conversion of Au144(SCH2CH2Ph)60 by Nimmala, Praneeth Reddy, Dass, Amala

“…A new aromatic thiolate protected gold nanomolecule Au99(SPh)42 has been synthesized by reacting the highly stable Au144(SCH2CH2Ph)60 with thiophenol, HSPh…”
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Synthesis of Aromatic Thiolate-Protected Gold Nanomolecules by Core Conversion: The Case of Au36(SPh‑tBu)24 by Theivendran, Shevanuja, Dass, Amala

“…Ultrasmall nanomolecules (<2 nm) such as Au25(SCH2CH2Ph)18, Au38(SCH2CH2Ph)24, and Au144(SCH2CH2Ph)60 are well studied and can be prepared using established…”
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Au24(SAdm)16 Nanomolecules: X‑ray Crystal Structure, Theoretical Analysis, Adaptability of Adamantane Ligands to Form Au23(SAdm)16 and Au25(SAdm)16, and Its Relation to Au25(SR)18 by Crasto, David, Barcaro, Giovanni, Stener, Mauro, Sementa, Luca, Fortunelli, Alessandro, Dass, Amala

“…Here we present the crystal structure, experimental and theoretical characterization of a Au24(SAdm)16 nanomolecule. The composition was verified by X-ray…”
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Separation of Enantiomers and CD Spectra of Au40(SCH2CH2Ph)24: Spectroscopic Evidence for Intrinsic Chirality by Knoppe, Stefan, Dolamic, Igor, Dass, Amala, Bürgi, Thomas

“…Chirality unveiled: Thiolate‐protected Au40(SR)24 clusters were enantioenriched using an HPLC approach. CD spectra show strong mirror‐image responses,…”
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Electrocatalytic Oxygen Reduction Activities of Thiol-Protected Nanomolecules Ranging in Size from Au28(SR)20 to Au279(SR)84 by Sumner, Leigh, Sakthivel, Naga Arjun, Schrock, Hayley, Artyushkova, Kateryna, Dass, Amala, Chakraborty, Saumen

“…An open question in the field of nanocatalysis is how the size of nanoparticles tunes the catalysis. Here, we have investigated the kinetics of…”
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Crystal Structure of the Gold Nanoparticle [N(C8H17)4][Au25(SCH2CH2Ph)18] by Heaven, Michael W, Dass, Amala, White, Peter S, Holt, Kennedy M, Murray, Royce W

“…We report the crystal structure of the thiolate gold nanoparticle [TOA+][Au25(SCH2CH2Ph)18 -], where TOA+ = N(C8H17)4 +. The crystal structure reveals three…”
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Synthesis of Au38(SCH2CH2Ph)24, Au36(SPh‑tBu)24, and Au30(S‑tBu)18 Nanomolecules from a Common Precursor Mixture by Rambukwella, Milan, Dass, Amala

“…Phenylethanethiol protected nanomolecules such as Au25, Au38, and Au144 are widely studied by a broad range of scientists in the community, owing primarily to…”
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X-ray Crystal Structure of Au38-xAgx(SCH2CH2Ph)24 Alloy Nanomolecules by Kumara, Chanaka, Gagnon, Kevin J, Dass, Amala

“…Herein, we report the X-ray crystallographic structure of a 38-metal atom Au-Ag alloy nanomolecule. The structure of monometallic Au38(SR)24 consists of 2…”
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Nanocluster Size Evolution Studied by Mass Spectrometry in Room Temperature Au25(SR)18 Synthesis by Dharmaratne, Asantha C, Krick, Thomas, Dass, Amala

“…We show that MALDI mass spectrometry, suitable for mixtures, is an indispensable tool in probing the mechanism of nanocluster synthesis enabling positive…”
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Size Exclusion Chromatography for Semipreparative Scale Separation of Au38(SR)24 and Au40(SR)24 and Larger Clusters by Knoppe, Stefan, Boudon, Julien, Dolamic, Igor, Dass, Amala, Bürgi, Thomas

“…Size exclusion chromatography (SEC) on a semipreparative scale (10 mg and more) was used to size-select ultrasmall gold nanoclusters (<2 nm) from polydisperse…”
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In Situ Reaction Monitoring Reveals a Diastereoselective Ligand Exchange Reaction between the Intrinsically Chiral Au38(SR)24 and Chiral Thiols by Knoppe, Stefan, Azoulay, Raymond, Dass, Amala, Bürgi, Thomas

“…The ligand exchange reaction between racemic Au38(2-PET)24 (2-PET = 2-phenylethylthiolate) clusters and enantiopure 1,1′-binaphthyl-2,2′-dithiol (BINAS) was…”
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Core Size Interconversions of Au30(S-tBu)18 and Au36(SPhX)24 by Dass, Amala, Jones, Tanya C, Theivendran, Shevanuja, Sementa, Luca, Fortunelli, Alessandro

“…We report for the first time the interconversion between two nanomolecules: Au36(SPhX)24, (where X = -H or -tBu) and Au30(S-tBu)18. This is accomplished…”
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Core Size Conversion of Au329(SCH2CH2Ph)84 to Au279(SPh‑tBu)84 Nanomolecules by Eswaramoorthy, Senthil Kumar, Sakthivel, Naga Arjun, Dass, Amala

“…We report the core size conversion of Au329(SCH2CH2Ph)84 to Au279(SPh-tBu)84 plasmonic nanomolecules. The mass spectrometric studies have revealed an…”
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Neat and Complete: Thiolate-Ligand Exchange on a Silver Molecular Nanoparticle by AbdulHalim, Lina G, Kothalawala, Nuwan, Sinatra, Lutfan, Dass, Amala, Bakr, Osman M

“…Atomically precise thiolate-protected noble metal molecular nanoparticles are a promising class of model nanomaterials for catalysis, optoelectronics, and the…”
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Core-Size Conversion of Au38(SCH2CH2Ph)24 to Au30(S–tBu)18 Nanomolecules by Rambukwella, Milan, Sementa, Luca, Fortunelli, Alessandro, Dass, Amala

“…Au38(SCH2CH2Ph)24 nanomolecules upon etching with tert-butylthiol undergo core-size conversion to green-gold Au30(S–tBu)18 via Au36(SCH2CH2Ph)24‑x (S–tBu) x…”
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