Thiolate-Protected Au24(SC2H4Ph)20 Nanoclusters: Superatoms or Not?

被引：106

作者：

Zhu, Manzhou ^{[1
]}

Qian, Huifeng ^{[2
]}

Jin, Rongchao ^{[2
]}

机构：

[1] Anhui Univ, Dept Chem, Hefei 230039, Anhui, Peoples R China

[2] Carnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2010年 / 1卷 / 06期

关键词：

LARGE-SCALE SYNTHESIS; GOLD CLUSTERS; OPTICAL-ABSORPTION; CRYSTAL-STRUCTURE; AU-25; CLUSTERS; NANOPARTICLES; PARTICLES; COMPLEXES; MOLECULES; OXIDATION;

D O I：

10.1021/jz100133n

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report a new gold thiolate cluster with molecular purity. Electrospray ionization (ESI) mass spectrometry in conjunction with thermogravimetric analysis (TGA), elemental analysis (EA), and H-1 NMR, unambiguously determined the composition of the as-prepared Au nanocluster to be Au-24(SC2H4Ph)(20). The optical absorption spectrum of this cluster shows a highest occupied molecular orbital to lowest unoccupied molecular orbital (HOMO-LUMO) transition at 765 nm, indicating quantum confinement of electrons in the particle. The HOMO-LUMO gap (similar to 1.5 eV) of Au-24(SR)(20) is much smaller than that of Au-20(SR)(16) (similar to 2.1 eV) but slightly larger, than that of Au-25(SR)(18) (similar to 1.3 eV). The number of valence electrons in Au-24(SC2H4Ph)(20) is 4e, which is not predicted by the superatom model.

引用

页码：1003 / 1007

页数：5

共 43 条

[1] Synthesis and Bioconjugation of 2 and 3 nm-Diameter Gold Nanoparticles [J].

Ackerson, Christopher J. ;

Jadzinsky, Pablo D. ;

Sexton, Jonathan Z. ;

Bushnell, David A. ;

Kornberg, Roger D. .

BIOCONJUGATE CHEMISTRY, 2010, 21 (02) :214-218

[2] Optical absorption spectra of nanocrystal gold molecules [J].

Alvarez, MM ;

Khoury, JT ;

Schaaff, TG ;

Shafigullin, MN ;

Vezmar, I ;

Whetten, RL .

JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (19) :3706-3712

[3] Silver Nanoparticles with Broad Multiband Linear Optical Absorption [J].

Bakr, Osman M. ;

Amendola, Vincenzo ;

Aikens, Christine M. ;

Wenseleers, Wim ;

Li, Rui ;

Dal Negro, Luca ;

Schatz, George C. ;

Stellacci, Francesco .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2009, 48 (32) :5921-5926

[4] PHYSICS OF METAL-CLUSTERS [J].

COHEN, ML ;

CHOU, MY ;

KNIGHT, WD ;

DEHEER, WA .

JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (12) :3141-3149

[5] Mass Spectrometric Identification of Au68(SR)34 Molecular Gold Nanoclusters with 34-Electron Shell Closing [J].

Dass, Amala .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (33) :11666-+

[6] An organometallic approach to gold nanoparticles:: synthesis and x-ray structure of CO-protected Au21Fe10, Au22Fe12,Au28Fe14, and Au34Fe14 clusters [J].

Femoni, Cristina ;

Iapalucci, Maria Carmela ;

Longoni, Giuliano ;

Tiozzo, Cristina ;

Zacchini, Stefano .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2008, 47 (35) :6666-6669

[7] Chiral inversion of gold nanoparticles [J].

Gautier, Cyrille ;

Buergi, Thomas .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (22) :7077-7084

[8] Size-controlled synthesis of near-monodisperse gold nanoparticles in the 1-4 nm range using polymeric stabilizers [J].

Hussain, I ;

Graham, S ;

Wang, ZX ;

Tan, B ;

Sherrington, DC ;

Rannard, SP ;

Cooper, AI ;

Brust, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (47) :16398-16399

[9] What Protects the Core When the Thiolated Au Cluster is Extremely Small? [J].

Jiang, De-en ;

Chen, Wei ;

Whetten, Robert L. ;

Chen, Zhongfang .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (39) :16983-16987

[10] Quantum sized, thiolate-protected gold nanoclusters [J].

Jin, Rongchao .

NANOSCALE, 2010, 2 (03) :343-362

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