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Title: Controlling Gold Nanoclusters by Diphospine Ligands

Abstract

We report the synthesis and structure determination of a new Au22 nanocluster coordinated by six bidentate diphosphine ligands: 1,8-bis(diphenylphosphino) octane (L8 for short). Single crystal x-ray crystallography and electrospray ionization mass spectrometry show that the cluster assembly is neutral and can be formulated as Au22(L8)6. The Au22 core consists of two Au11 units clipped together by four L8 ligands, while the additional two ligands coordinate to each Au11 unit in a bidentate fashion. Eight gold atoms at the interface of the two Au11 units are not coordinated by any ligands. Four short gold-gold distances (2.64?2.65 Å) are observed at the interface of the two Au11 clusters as a result of the clamping force of the four clipping ligands and strong electronic interactions. The eight uncoordinated surface gold atoms in the Au22(L8)6 nanocluster are unprecedented in atom-precise gold nanoparticles and can be considered as potential in-situ active sites for catalysis.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1120083
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of the American Chemical Society, 136(1):92-95
Additional Journal Information:
Journal Name: Journal of the American Chemical Society, 136(1):92-95
Country of Publication:
United States
Language:
English
Subject:
Environmental Molecular Sciences Laboratory

Citation Formats

Chen, Jing, Zhang, Qianfan, Bonaccorso, Timary A., Williard, Paul G., and Wang, Lai S. Controlling Gold Nanoclusters by Diphospine Ligands. United States: N. p., 2014. Web. doi:10.1021/ja411061e.
Chen, Jing, Zhang, Qianfan, Bonaccorso, Timary A., Williard, Paul G., & Wang, Lai S. Controlling Gold Nanoclusters by Diphospine Ligands. United States. doi:10.1021/ja411061e.
Chen, Jing, Zhang, Qianfan, Bonaccorso, Timary A., Williard, Paul G., and Wang, Lai S. Wed . "Controlling Gold Nanoclusters by Diphospine Ligands". United States. doi:10.1021/ja411061e.
@article{osti_1120083,
title = {Controlling Gold Nanoclusters by Diphospine Ligands},
author = {Chen, Jing and Zhang, Qianfan and Bonaccorso, Timary A. and Williard, Paul G. and Wang, Lai S.},
abstractNote = {We report the synthesis and structure determination of a new Au22 nanocluster coordinated by six bidentate diphosphine ligands: 1,8-bis(diphenylphosphino) octane (L8 for short). Single crystal x-ray crystallography and electrospray ionization mass spectrometry show that the cluster assembly is neutral and can be formulated as Au22(L8)6. The Au22 core consists of two Au11 units clipped together by four L8 ligands, while the additional two ligands coordinate to each Au11 unit in a bidentate fashion. Eight gold atoms at the interface of the two Au11 units are not coordinated by any ligands. Four short gold-gold distances (2.64?2.65 Å) are observed at the interface of the two Au11 clusters as a result of the clamping force of the four clipping ligands and strong electronic interactions. The eight uncoordinated surface gold atoms in the Au22(L8)6 nanocluster are unprecedented in atom-precise gold nanoparticles and can be considered as potential in-situ active sites for catalysis.},
doi = {10.1021/ja411061e},
journal = {Journal of the American Chemical Society, 136(1):92-95},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {1}
}