Bulky t-Butyl Thiolated Gold Nanomolecular Series: Synthesis, Characterization, Optical Properties, and Electrocatalysis
| Autor: | Saumen Chakraborty, Leigh Sumner, Abubkr Abuhagr, Mohammad bin Hatshan, Amala Dass, Guda Ramakrishna, Tanya C. Jones |
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| Rok vydání: | 2018 |
| Předmět: |
Series (mathematics)
Ligand Chemistry Dispersity 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrocatalyst 01 natural sciences Combinatorial chemistry Oxygen reduction 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Characterization (materials science) Matrix-assisted laser desorption/ionization General Energy Reactivity (chemistry) Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry C. 122:17726-17737 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.8b01106 |
| Popis: | Here we report the synthesis and size-dependent optical study of a series of bulky t-butyl thiolated monodisperse nanomolecules (NMs): Au23(S-tBu)16, Au30(S-tBu)18, Au46(S-tBu)24, and Au65(S-tBu)29. We further employ this series of NMs to address how the NM core size affects electrocatalytic oxygen reduction reactivity of these NMs in alkaline media. Though Au23(S-tBu)16 and Au30(S-tBu)18 have been reported before, the expansion of this series is brought about by the discovery, through the synthesis and characterization, of two new and larger species, in the bulky t-butyl thiolated NM series: namely Au46(S-tBu)24 and Au65(S-tBu)29. Furthermore, we take an in-depth look at the ligand effects in the bulky thiolated NM series and ligand dictation over the gold atoms to surface ligands. Assignments of molecular formulae are based on results obtained in high-resolution nanoelectrospray ionization mass spectrometry (nESI-MS). Purity was confirmed with matrix assisted laser desorption ionization time-of-flight m... |
| Databáze: | OpenAIRE |
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