Au21S(SAdm)15: An Anisotropic Gold Nanomolecule. Optical and Photoluminescence Spectroscopy and First-Principles Theoretical Analysis

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• 作者：Alessandro FortunelliLuca Sementa ; Viraj Dhanushka Thanthirige ; Tanya C. Jones ; Mauro Stener ; Kevin J. Gagnon ; Amala Dass ; Guda Ramakrishna
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2017
• 出版时间：January 19, 2017
• 年：2017
• 卷：8
• 期：2
• 页码：457-462
• 全文大小：493K
• ISSN：1948-7185

文摘

We introduce a class of gold nanomolecules exhibiting anisotropy as a major feature by reporting steady-state and time-resolved photoluminescence and anisotropy measurements and in-depth theoretical analysis of energetics and optical response of a recently synthesized Au₂₁S(SAdm)₁₅ nanomolecule (SAdm = adamantanethiol). Starting from single-crystal X-ray data showing that Au₂₁S(SAdm)₁₅ exhibits a symmetry-broken structure, we unambiguously demonstrate how this translates into a striking anisotropy of its properties, for example, of its (chiro)optical absorption spectrum of great promise for sensing, optoelectronic, and electrochemical applications, and argue about the abundance and general significance of this class of compounds.