Abstract
Tetradentate thioacetyl porphyrin ligand (1) was synthesized to protect gold nanoparticles. 1-protected gold nanoparticles were characterized by UV-vis spectroscopy and XPS. Analysis by XPS showed that all of four thioacetyl groups of 1 were dissociated and bound to the surface of gold nanoparticles in thiolate form. The size of 1-protected gold nanoparticles (GN:1) was controlled by thioacetyl group/HAuCl4 molar ratio and approached to 2 nm. Compared with a protecting ligand without porphyrin plane (2) or dodecanethiol, 1 can control the size of gold nanoparticles efficiently probably due to the tetradentate ligation effect.
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Acknowledgments
This work was supported by Grant-in-Aid for Young Scientists (B) (Nos. 17750156 and 20750135) from the Ministry of Education, Culture, Sports, Science and Technology. J.O. thanks the JSPS Research Fellowships for Young Scientists. The authors would like to thank Prof. K. Naka (Kyoto Inst. Tech.), Dr. A. Narita and Prof. Y. Chujo (Kyoto Univ.) for kind access and assistance to TEM measurements.
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Ohyama, J., Hitomi, Y., Higuchi, Y. et al. Size Controlled Synthesis of Gold Nanoparticles by Porphyrin with Four Sulfur Atoms. Top Catal 52, 852–859 (2009). https://doi.org/10.1007/s11244-009-9229-x
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DOI: https://doi.org/10.1007/s11244-009-9229-x