In situ laser Raman spectra of iron phthalocyanine adsorbed on copper and gold electrodes. [Electronic structure]

Journal Article · Sat Jan 01 04:00:00 EST 1983 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100241a033· OSTI ID:7051622

Melendres, C A; Rios, C B; Feng, X; McMasters, R

Raman spectra of iron phthalocyanine (FePc) and its tetrasulfonated derivative (FeTSPc) adsorbed on copper and gold electrodes have been observed in situ in 0.05 M H/sub 2/SO/sub 4/ solution. Results confirm the authors previous finding on the coordination of FePc to water molecules to solution. Evidence suggests that the iron phthalocyanines are probably oriented with their planes parallel to the electrode surface even in immersed electrodes. A decrease in intensity and broadening of some vibrational bands are observed on increasing cathodic polarization; these are attributed to a lifting of the degeneracy of the vibrational modes due to a change in symmetry of the adsorbed molecules brought about by polarization induced by the double-layer field. The effect of carbon on the Raman spectra is discussed. The iron phthalocyanines appear to be stable at potentials close to hydrogen evolution in the absence of oxygen. 18 references, 8 figures.

• Research Organization: Argonne National Lab., IL
• OSTI ID: 7051622
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 87:18; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400400 -- Electrochemistry
ADSORPTION
AQUEOUS SOLUTIONS
CHEMICAL REACTIONS
COMPLEXES
COPPER
DATA
DERIVATIZATION
DISPERSIONS
DYES
ELECTRODES
ELECTRONIC STRUCTURE
ELEMENTS
EXPERIMENTAL DATA
GOLD
HETEROCYCLIC COMPOUNDS
HYDRATION
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IRON COMPLEXES
LASER SPECTROSCOPY
METALS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHTHALOCYANINES
RAMAN SPECTRA
SOLUTIONS
SOLVATION
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SPECTROSCOPY
SULFONATES
SULFURIC ACID
SURFACE PROPERTIES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
VOLTAMETRY