Spectroelectrochemical Study of the Reversible Adduct Formation of Bis(phthalocyaninato)neodymate(III) Complex with CO2 in a DMF Solution

Abstract

The reaction between CO2 and electrochemically reduced bis(phthalocyaninato)neodymate(III) complex in a dimethylformamide solution was investigated by cyclic voltammetry and in situ visible spectroscopy. The introduction of gaseous CO2 into the phthalocyanine solution caused a considerable increase in the first reduction peak current of the complex and a shift in the second reduction peak to more positive potentials. In addition, new anodic current peaks appeared in the reverse sweep at potentials different from those of the complex. These observations were explained in terms of the formation of a CO2-adduct. The formation and decomposition of the CO2-adducts occurred reversibly with the applied potential, which was confirmed by in situ visible spectroscopy.

Anomalously Large Spectral Shifts near the Quantum Tunnelling Limit in Plasmonic Rulers with Subatomic Resolution

“…The BPc electronic structure is dominated by the resultant π–π coupling. ,− In comparison to the previous use of graphene , as a spacer, which has a nominal 0.34 nm thickness, these BPc-based systems are stable against Au–Au van der Waals forces, physically and chemically robust, and highly suited to testing out models of conduction at optical frequencies. This also introduces a new degree of freedom into the gap, since the coupled Pc 2 ligand pair is easily oxidized and reduced, ,− modifying the gap electromagnetic properties. We show that the resulting plasmonic constructs are robust, scalable, and easy to fabricate via bottom-up nanoassembly.…”