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Electrode surface modification by a spirobifluorene derivative. An XPS and electrochemical investigation.
- Source :
-
The journal of physical chemistry. B [J Phys Chem B] 2005 Oct 06; Vol. 109 (39), pp. 18427-32. - Publication Year :
- 2005
-
Abstract
- Ordered thin layers of a spirobifluorene derivative containing an amino group were formed by grafting them onto a self-assembled monolayer (SAM) of 11-mercaptoundecanoic acid (11-MUA) on gold. Either physical (H-bonding) or chemical bonding (activated by EDCl) was investigated. X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy confirmed that both methods can be used to effectively graft 2-amino-9,9'-spirobifluorene molecules onto the SAM surface, giving high surface coverages, with a significantly higher packing in the case of chemisorbed films. EIS measurements also showed that the covalently bonded spirobifluorene SAMs act as an effective barrier to both ion penetration and heterogeneous electron transfer.
Details
- Language :
- English
- ISSN :
- 1520-6106
- Volume :
- 109
- Issue :
- 39
- Database :
- MEDLINE
- Journal :
- The journal of physical chemistry. B
- Publication Type :
- Academic Journal
- Accession number :
- 16853372
- Full Text :
- https://doi.org/10.1021/jp051786w