AI Article Synopsis
- A strategy was developed to control the density of manganese (Mn12) clusters on silicon(100) surfaces using diluted monolayers created from specific chemical mixtures.
- The process involved preparing surfaces that allowed for the attachment of Mn12 clusters and analyzing these surfaces through various spectroscopic and imaging techniques.
- Results indicated that a higher ester mole ratio on the surface compared to the original mixture directly influenced the density of Mn12 clusters, with isolated clusters being visible when a 1:1 solution of ester to decene was used.
Article Abstract
A synthetic strategy to control the density of Mn12 clusters anchored on silicon(100) was investigated. Diluted monolayers suitable for Mn12 anchoring were prepared by Si-grafting mixtures of the methyl 10-undecylenoate precursor ligand with 1-decene spectator spacers. Different ratios of these mixtures were tested. The grafted surfaces were hydrolyzed to reveal the carboxylic groups available for the subsequent exchange with the [Mn12O12(OAc)16(H2O)4]4 H2O2 AcOH cluster. Modified surfaces were analyzed by attenuated total reflection (ATR)-FTIR spectroscopy, X-ray photoemission spectroscopy (XPS), and AFM imaging. Results of XPS and ATR-FTIR spectroscopy show that the surface mole ratio between grafted ester and decene is higher than in the source solution. The surface density of the Mn12 cluster is, in turn, strictly proportional to the ester mole fraction. Well-resolved and isolated clusters were observed by AFM, using a diluted ester/decene 1:1 solution.
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| http://dx.doi.org/10.1002/chem.200500943 | DOI Listing |
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