Iridium oxohydroxide thin coatings have been prepared by a dynamic oxidation electrodeposition method from complex oxalate solutions that induce template effects in the final coating at the nanoscale. The preparation method induces the formation of a oxohydroxide with reproducible stoichiometry and sponge-like quasiamorphous open structure, high ionic mobility, and significant behavior as compared with other reported iridium oxides as derived from X-ray diffraction, XPS, and TGA. Reproducible mixed valence states are also observed and a local rutile structure that allows ion exchange and facile redox changes. Rather significant is the large affinity for organic compounds observed and the behavior as substrate for cell culture, the best observed to date. Optimal cell response seems to be related to such open structure, which suggests this coating as ideal for devices implanted in the nervous system.

A simple and efficient one-step encapsulation of caffeine was carried out in MOF NH2-MIL-88B(Fe) and compared to the traditional three-stage synthesis–activation–encapsulation procedure.

The molecular organization of Langmuir-Blodgett (LB) multilayers of a phospholipid (DMPA) and LB alternate multilayers consisting of mixed monolayers of a viologen (TDMV) and a phospholipid (DMPA), molar ratio of TDMV:DMPA)1:2, and pure DMPA monolayers have been studied by infrared (IR) transmission and reflection-absorption (RA) spectroscopies. The infrared study shows that the DMPA monolayers are ordered like a crystalline phase where the alkyl chains are almost normally oriented to the substrate surface approaching an all-trans configuration. Also, the stretching mode of the carboxyl group lines up with a large component normal to the substrate, as seems to be the transition dipole moments of phosphate and COC groups. The presence of TDMV molecules in the mixed LB films does not significantly alter the structure of the DMPA films. The TDMV rings are tilted relative to the substrate surface, and located between the phosphate groups of the DMPA molecules of the mixed monolayer and of the subsequent DMPA layer. Thus, the influence of the TDMV molecules on the dehydration of the film is extended to the phospholipid in the mixed monolayer as well as to the one in the pure DMPA layer.