Ag44(SR)30(4-): a silver-thiolate superatom complex.

Ag44(SR)30(4-): a silver-thiolate superatom complex.
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DOI:
10.1039/c2nr30773a
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发表时间:
2012-07-21
期刊:
影响因子:
6.7
通讯作者:
McLean JA
McLean JA
中科院分区:
材料科学2区
文献类型:
--
作者:
Harkness KM;Tang Y;Dass A;Pan J;Kothalawala N;Reddy VJ;Cliffel DE;Demeler B;Stellacci F;Bakr OM;McLean JA

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最近合成了由芳基硫醇盐保护的银的强吸收和宽吸收纳米颗粒(IBAN),并显示出独特的光学性质,但其分散性和分子式的问题仍然存在。IBAN是一种超原子复合物,分子式为Ag 44(SR)304−,电子数为18。这种分子特征与4-氟苯硫酚或2-萘乙撑保护的IBAN相同。分子式和纯度通过质谱法测定,并通过沉降速度-分析超离心法确认。这些数据还初步表明了Ag 44(SR)304−的独特结构和环境。
Intensely- and broadly-absorbing nanoparticles (IBANs)of silver protected by arylthiolates were recently synthesized and showed unique optical properties, yet question of their dispersity and their molecular formulas remained. Here IBANs are identified as a superatom complex with a molecular formula of Ag44(SR)304− and an electron count of 18.This molecular character is shared by IBANs protected by 4-fluorothiophenol or 2-naphthalenethiol. The molecular formula and purity is determined by mass spectrometry and confirmed by sedimentation velocity-analytical ultracentrifugation. The data also give preliminary indications of a unique structure and environment for Ag44(SR)304−.
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