Thin molecular films of supramolecular porphyrins

Abstract

A relevant series of symmetric supramolecular porphyrins has been obtained by attaching four [Ru II (bipy) 2 Cl] groups to the pyridyl substituents of meso-tetra(4-pyridyl)porphyrin and its metallated derivatives. These compounds display a rich electrochemistry and versatile catalytic, electrocatalytic and photochemical properties, associated with the ruthenium-bipyridine and the porphyrin complexes. These properties can be transferred to the electrodes by attaching thin molecular films of the compounds, by dip-coating, electrostatic assembly or electropolymerization. In this way, the interesting properties of those supermolecules and supramolecular assemblies can be used to prepare molecular devices and sensors.

Progress in the studies of low-molecular mass gelators with unusual properties

“…Different from the dipeptide-based derivatives reported earlier, these compounds are organic acids (65)(66)(67)(68)(69)(70)(71)(72)(73)(74)(75)(76)(77)(78)(79)(80), and possess phase-selective gelation ability of gelating organic solvents from their biphasic mixtures with water. Interestingly, the sodium salts of some of the dipeptide derivatives (69a, 75a, 77a, 78a, and 79a) only gel the aqueous phase of the mixture solvents via the heating-cooling cycle.…”

“…Generally speaking, compounds with potential applications in constructing supramolecular films include polymers, polymetallic coordination compounds, polyelectrolytes, and conventional surfactants, etc. [64][65][66][67][68]. However, small molecules of the above mentioned film formation properties have not shown gelation properties as LMMGs do [69,70].…”

Metalloporphyrin electropolymerization: electrochemical quartz crystal microgravimetric studies

“…The electropolymerization (EP) of vinyl-substituted metal porphyrins has given rise to an extended literature [2,[5][6][7][8][9]. The procedure, originally described by Macor and Spiro [10], produces adherent films on electrode surface and increases the lifetime of the resulting modified electrodes.…”

Nanomateriais híbridos de porfirinas supramoleculares e nanoparticulas de ouro e suas aplicações em dispositivos amperométricos

“…[12,13,14,15,16,17,18] . Em seguida, foram estudadas as porfirinas supermoleculares [19,20,21,22,23,24,25,26,27,28,29,30,31] obtida pela coordenação de quatro grupos [Ru(bipy) 2 Cl] + às M-TPyPs. Com essa série de compostos, foram estudados os efeitos da interação entre o anel porfirínico e os complexos de rutênio periféricos sobre as propriedades espectroscópicas, eletroquímicas e fotofísicas.…”