Self-assembly of carboxylic substituted PTM radicals: From weak ferromagnetic interactions to robust porous magnets

• Published in: Polyhedron 2007-06, Vol.26 (9), p.1934-1948
• Main Authors: Roques, Nans, Maspoch, Daniel, Datcu, Angela, Wurst, Klaus, Ruiz-Molina, Daniel, Rovira, Concepció, Veciana, Jaume
• Format: Article
• Language: English
• Subjects: Nanoporous materials; PTM radicals; Pure organic magnet; Supramolecular chemistry
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2006.09.065

In this short review, the work that have been developed over the last six years in our group on the use of polychlorotriphenylmetyl radicals (PTM) functionalized by carboxylic groups to access to purely organic/molecular magnetic materials is reported. Starting from the seminal work on the monocarboxylic PTM, we will then report the self-assembly of PTM radicals functionalized with two and three carboxylic groups. In those cases, the self-assembly of the paramagnetic units yield robust and porous magnetic 2D-structures. The last part of the review will present the latest results obtained with the idea to increase both the structural and magnetic dimensionality in purely organic PTM-based materials using a PTM radical functionalized by six carboxylic groups. An overview of the work that have been developed over the last six years in our group on the use of polychlorotriphenylmetyl radicals (PTM) functionalized by carboxylic groups to access to purely organic/molecular magnetic materials is reported. From the seminal work on the monocarboxylic PTM (Section 2), of great importance to determine both the ability of these molecules to form intermolecular H-bonds and the nature of the intermolecular interactions mediated through the resulting supramolecular motifs, we will move to the self-assembly of PTM radicals functionalized with two and three carboxylic groups (Section 3). In those cases, the self-assembly of the paramagnetic units yield robust and porous magnetic structures, associating in some cases magnetic ordering to the latest remarkable characteristics. The last part of the review will present the latest results obtained with the idea to increase both the structural and magnetic dimensionality in purely organic PTM-based materials using a PTM radical functionalized by six carboxylic groups (Section 4). New trends and challenges for this research line, concerning the design and synthesis of new PTM radicals, as well as the obtaining of PTM based sensors or multifunctional materials will be presented in the concluding section (Section 5).