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- Title
Alkyltin Keggin Clusters Templated by Sodium.
- Authors
Saha, Sumit; Park, Deok ‐ Hie; Hutchison, Danielle C.; Olsen, Morgan R.; Zakharov, Lev N.; Marsh, David; Goberna ‐ Ferrón, Sara; Frederick, Ryan T.; Diulus, J. Trey; Kenane, Nizan; Herman, Gregory S.; Johnson, Darren W.; Keszler, Douglas A.; Nyman, May
- Abstract
Dodecameric (Sn12) and hexameric topologies dominate monoalkyltin-oxo cluster chemistry. Their condensation, triggered by radiation exposure, recently produced unprecedented patterning performance in EUV lithography. A new cluster topology was crystallized from industrial n-BuSnOOH, and additional characterization techniques indicate other clusters are present. Single-crystal X-ray analysis reveals a β-Keggin cluster, which is known but less common than other Keggin isomers in polyoxometalate and polyoxocation chemistry. The structure is formulated [NaO4(BuSn)12(OH)3(O)9(OCH3)12(Sn(H2O)2)] (β-NaSn13). SAXS, NMR, and ESI MS differentiate β-NaSn13, Sn12, and other clusters present in crude ' n-BuSnOOH' and highlight the role of Na as a template for alkyltin Keggin clusters. Unlike other alkyltin clusters that are cationic, β-NaSn13 is neutral. Consequently, it stands as a unique model system, absent of counterions, to study the transformation of clusters to films and nanopatterns.
- Subjects
CRYSTALLIZATION; KEGGIN anions; THIN films; POLYOXOMETALATES; POLYOXOMETALATE salts
- Publication
Angewandte Chemie, 2017, Vol 129, Issue 34, p10274
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201701703