Multinitrogen heteroaromatics studied at Pt(111) surfaces by EELS, Auger spectroscopy, and electrochemistry: Pyrazine, pyrimidine, pyridazine, 1,3,5-triazine, and their carboxylic acid derivatives
- Univ. of Cincinnati, OH (USA)
Reported here are surface electrochemical studies of several multinitrogen heteroaromatics and their carboxylic acid derivatives adsorbed at well-defined Pt(111) electrode surfaces from aqueous solutions. The adsorbates studied include pyrazine (PZ), pyrimidine (PM), pyridazine (PD), 2-pyrazinecarboxylic acid (PZCA), 2,3-pyrazinedicarboxylic acid (23PZDCA), 4-pyridazinecarboxylic acid (4PDCA), and 1,3,5-triazine (TZ). Packing densities (moles adsorbed per unit area) of each compound adsorbed from solution at controlled pH and electrode potential are measured by means of Auger spectroscopy. All of the above compounds except TZ adsorb strongly to Pt(111). Surface vibrational spectra of these adsorbed layers are obtained by electron energy-loss spectroscopy (EELS) and are compared with either vapor- or condensed-phase infrared (IR) spectra of the parent compounds. The similarity of EELS and IR spectra indicates that the adsorbates retain their molecular structure unchanged as a result of adsorption.
- OSTI ID:
- 6297848
- Journal Information:
- Langmuir; (USA), Vol. 6:7; ISSN 0743-7463
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
PLATINUM
SURFACE PROPERTIES
PYRAZINES
ADSORPTION
PYRIMIDINES
TRIAZINES
AQUEOUS SOLUTIONS
AUGER ELECTRON SPECTROSCOPY
CARBOXYLIC ACIDS
ELECTROCHEMISTRY
EXPERIMENTAL DATA
AZINES
CHEMISTRY
DATA
DISPERSIONS
ELECTRON SPECTROSCOPY
ELEMENTS
HETEROCYCLIC COMPOUNDS
INFORMATION
METALS
MIXTURES
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PLATINUM METALS
SOLUTIONS
SORPTION
SPECTROSCOPY
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties