Premium
Density Control of Dodecamanganese Clusters Anchored on Silicon(100)
Author(s) -
Condorelli Guglielmo G.,
Motta Alessandro,
Favazza Maria,
Nativo Paola,
Fragalà Ignazio L.,
Gatteschi Dante
Publication year - 2006
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200500943
Subject(s) - x ray photoelectron spectroscopy , chemistry , fourier transform infrared spectroscopy , attenuated total reflection , silicon , mole fraction , cluster (spacecraft) , spectroscopy , analytical chemistry (journal) , monolayer , infrared spectroscopy , crystallography , organic chemistry , chemical engineering , biochemistry , physics , quantum mechanics , computer science , engineering , programming language
A synthetic strategy to control the density of Mn 12 clusters anchored on silicon(100) was investigated. Diluted monolayers suitable for Mn 12 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 [Mn 12 O 12 (OAc) 16 (H 2 O) 4 ]⋅4 H 2 O⋅2 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 Mn 12 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.