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金酸盐环作为Au20(SR) 16纳米团中的保护图案及其影响

Chenjie Zeng1, Chong Liu, Yuxiang Chen

  • 1Department of Chemistry, Carnegie Mellon University , Pittsburgh, Pennsylvania 15213, United States.

Journal of the American Chemical Society
|August 16, 2014
PubMed
概括

超小金纳米团Au20 (TBBT) 16的晶体结构揭示了保护Au7核的新型环形图案. 这一发现提升了对黄金纳米集群核和生长模式的理解.

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Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are generally represented as RSH, where R is an alkyl substituent and —SH is the functional group. On the other hand, in sulfides, the central sulfur atom is bonded to two hydrocarbon groups on either side. Depending upon the type of group, sulfides can be either symmetrical or asymmetrical. Both thiols and sulfides display a bent geometry, similar...
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Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.