In situ surface-enhanced IR absorptiond spectroscopy on CO adducts of iron protoporphyrin IX self-assembled on a Au electrode

Article Abstract:

The surface coordination chemistry of carbon monoxide with the reduced form ([Fe.sup.II]PP) of iron(III) protoporphyrin IX ([Fe.sup.III]PP) monolayer self-assembled on a Au electrode in 0.1 M HCl[O.sub.4] is studied by using in situ ATR-surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS). The changes found in the coordination properties are attributed to an irreversible structural reorganization of the FePP adlayer caused by the potential excursion.

Industrial Gas Manufacturing, Industrial gases, Carbon Monoxide, Optical properties, Infrared spectroscopy, Coordination compounds

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Tunable surface-enhanced infrared adsorption on Au nanofilms on Si fabricated by self-assembly and growth of colloidal particles

Article Abstract:

A wet-chemistry strategy is proposed for fabricating Au nanofilms on IR transparent Si with controlled particle sizes and spatial distribution. The apparent surface enhancement factor increases with increasing sizes and/or contact and the severe aggregation of Au nanoparticles might cause the bipolar band shape.

Adsorption, Silver compounds, Colloid chemistry

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Degree of supersaturation-regulated chiral symmetry breaking in one crystal

Article Abstract:

The chiral symmetry-breaking phenomena in one crystal that is regulated by the degree of supersaturation is being studied. The results prove that the crystal enantiomeric excess increases inversely with the degree of supersaturation.

Chirality, Crystallization, Enantiomers, Asparaginase

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