Classic molecular compounds and emergent organic-inorganic hybrid perovskites with (multi) functional properties and (multi)stimuli responsiveness

Abstract

This Ph.D. Thesis focus on the development of new (multi)functional and (multi)stimuli responsive materials, based on organic-inorganic hybrids and molecular compounds, where the application of different stimuli (temperature, external isostatic/uniaxial pressure and/or internal chemical pressure) is able to induce specific functionalities in the materials. Moreover, this work aims to find new hybrid precursors for nanostructured carbon materials. These are important areas of research in Solid State and Materials Science in view of their technological potential and environmental applications. In this context, this Ph.D. Thesis has explored new functional properties on novel organic-inorganic hybrid materials with formula [TPrA][M(dca)3] (M = Mn2+, Fe2+, Co2+ and Ni2+) perovskite-like structure, some of which are synthesized and/or described for the first time. Also two very well-known molecular compounds, namely ferrocene, [Fe(C5H5)2], and ammonia-borane, (H3N·BH3), are investigated in the search for ferroic order. In addition, these studies have revealed pressure-induced caloric effects in the [TPrA][Mn(dca)3], which shows a promising potential for solid state cooling applications. Finally, the [TPrA][M(dca)3] (M = Ni2+ and Co2+) have been found to be very useful precursors in a simple, scalable and economical accessible synthetic method to obtain carbon nanotubes with magnetic nanoparticles embedded, M@CNTs (Ni2+ and Co2+).