Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 139, Issue 11, Pages 4168-4174Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b00568
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Funding
- AIRC [12214]
- Academy of Finland [263256, 292746]
- Academy of Finland (AKA) [292746, 292746] Funding Source: Academy of Finland (AKA)
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Thiolate-protected metal clusters are materials of ever-growing importance in fundamental and applied research. Knowledge of their single-crystal X-ray structures has been instrumental to enable advanced molecular understanding of their intriguing properties. So far, however, a general, reliable, chemically clean approach to prepare single crystals suitable for accurate crystallographic analysis was missing. Here we show that single crystals-of thiolate-protected clusters can be grown in large quantity and very high quality by electrocrystallization. This method relies on the fact that charged clusters, display a higher solubility in polar solvents than their neutral counterparts. Nucleation of the electrogenerated insoluble clusters directly onto the electrode surface eventually leads to the formation of a dense forest of millimeter-long single crystals. Electrocrystallization of three known Au-25(SR)(18)(0) clusters is described. A new cluster; Au-25(S-nC(5)H(11))(18), was also prepared and found to crystallize by forming bundles of millimeter-slong Au-25 polymers.
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