Abstract
Abstract Two types of tetrathiolated surface passivants were synthesized in order to explore the effect of S-functional groups (disulfide vs. S-thioester) to control the size of gold nanoparticles prepared by a simple one-pot reduction of tetrachloroaurate with sodium tetrahydroborate. Both the passivants have four thiolated arms in the same direction perpendicular to a porphyrin plane, and produced small porphyrin-coated gold nanoparticles 2 to 4 nm in size by one-pot reduction of AuIII ions at S/Au from 1 to 16. The constancy in particle size at S/Au ratio less than 4 was greater with use of tetradentate disulfide passivant compared with use of tetradentate S-thioester ligand, which should be attributed to faster adsorption of disulfide groups with gold than that of S-thioester groups. The results described here suggest that passivants having multivalent disulfide bonds should be promising candidates for constructing monolayer-protected gold nanoparticles of well-defined size.
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Dates
Type | When |
---|---|
Created | 14 years, 10 months ago (Oct. 21, 2010, 1:20 a.m.) |
Deposited | 1 year, 7 months ago (Jan. 20, 2024, 3:28 p.m.) |
Indexed | 1 year, 7 months ago (Jan. 21, 2024, 8:14 a.m.) |
Issued | 14 years, 10 months ago (Oct. 21, 2010) |
Published | 14 years, 10 months ago (Oct. 21, 2010) |
Published Online | 14 years, 10 months ago (Oct. 21, 2010) |
Published Print | 14 years, 9 months ago (Nov. 15, 2010) |
@article{Hitomi_2010, title={Efficient Capping of Growing Gold Nanoparticles by Porphyrin Having Two Disulfide Straps over One Face}, volume={83}, ISSN={1348-0634}, url={http://dx.doi.org/10.1246/bcsj.20100160}, DOI={10.1246/bcsj.20100160}, number={11}, journal={Bulletin of the Chemical Society of Japan}, publisher={Oxford University Press (OUP)}, author={Hitomi, Yutaka and Ohyama, Junya and Higuchi, Yasuhiro and Aoki, Kazuki and Shishido, Tetsuya and Funabiki, Takuzo and Kodera, Masahito and Tanaka, Tsunehiro}, year={2010}, month=oct, pages={1392–1396} }