In situ laser Raman spectra of iron phthalocyanine adsorbed on copper and gold electrodes

Journal Article · Thu Sep 01 04:00:00 EDT 1983 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100241a033· OSTI ID:5581075

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 our 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. 8 figures.

• Research Organization: Argonne National Lab., IL
• OSTI ID: 5581075
• 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
400104 -- Spectral Procedures-- (-1987)
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400400 -- Electrochemistry
400500 -- Photochemistry
550200 -- Biochemistry
59 BASIC BIOLOGICAL SCIENCES
ADSORPTION
AQUEOUS SOLUTIONS
AZINES
COMPLEXES
COPPER
DATA
DISPERSIONS
DYES
ELECTRIC POTENTIAL
ELECTRODES
ELECTROLYTIC CELLS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY-LEVEL TRANSITIONS
ESTERS
EXCITATION
EXPERIMENTAL DATA
GOLD
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IONIZATION
IRON COMPLEXES
LASER RADIATION
METALS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHOTOIONIZATION
PHTHALOCYANINES
PYRIDINE
PYRIDINES
RADIATIONS
RAMAN SPECTRA
SAMPLE PREPARATION
SOLUTIONS
SORPTION
SORPTIVE PROPERTIES
SPECTRA
STABILITY
SULFONIC ACID ESTERS
SULFURIC ACID
SURFACE PROPERTIES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
VOLTAMETRY