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Updated: Jan 22, 2026
![Microwave-assisted One-pot Synthesis of N-succinimidyl-4-[18F]fluorobenzoate [18F]SFB](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F2755.jpg&w=3840&q=50)
Microwave-assisted One-pot Synthesis of N-succinimidyl-4-[18F]fluorobenzoate [18F]SFB
Published on: June 28, 2011
Basic [Au25 (SCH2 CH2 Py)18 ]- ⋅Na+ Clusters: Synthesis, Layered Crystallographic Arrangement, and Unique Surface
Zhong Huang1, Yohei Ishida1, Tetsu Yonezawa1
1Division of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan.
Abstract:
The synthesis of high-purity and high-yield Au25 clusters protected by the basic pyridyl ethanethiol (HSCH2 CH2 Py, 4-PyET and 2-PyET) is presented. Single-crystal X-ray diffraction of the [Au25 (4-PyET)18 ]- ⋅Na+ clusters has revealed a structure similar to that known for the phenyl ethanethiolate analogue, but with pyridyl-N coordination to Na+ , a more relaxed ligand shell, and a profoundly layered arrangement in the solid state. Because of the pendant Py moiety, the [Au25 (PyET)18 ]- clusters are endowed with unique (de)protonation equilibria, which has been characterized in detail by UV/Vis absorption and 1 H NMR spectroscopy. [Au25 (PyET)18 ]- clusters showed an unexpectedly H+ -dependent solubility that is tunable in aqueous and organic solvents. The successful synthesis of the basic Py-terminated thiolate-protected Au25 clusters paves the way to realize a new family of metalloid clusters possessing basic properties.
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