Cation Exchange Strategy for the Encapsulation of a Photoactive CO-Releasing Organometallic Molecule into Anionic Porous Frameworks

Francisco J. Carmona, Sara Rojas, Purificación Sánchez, Hélia F. Jeremias, Ana R. Marques, Carlos Jose Romao, Duane Choquesillo-Lazarte, Jorge A R Navarro, Carmen R. Maldonado, Elisa Barea

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The encapsulation of the photoactive, nontoxic, water-soluble, and air-stable cationic CORM [Mn(tacn)(CO)3]Br (tacn = 1,4,7-triazacyclononane) in different inorganic porous matrixes, namely, the metalorganic framework bio-MOF-1, (NH2(CH3)2)2[Zn8(adeninate)4(BPDC)6]·8DMF·11H2O (BPDC = 4,4′-biphenyldicarboxylate), and the functionalized mesoporous silicas MCM-41-SO3H and SBA-15-SO3H, is achieved by a cation exchange strategy. The CO release from these loaded materials, under simulated physiological conditions, is triggered by visible light. The results show that the silica matrixes, which are unaltered under physiological conditions, slow the kinetics of CO release, allowing a more controlled CO supply. In contrast, bio-MOF-1 instability leads to the complete leaching of the CORM. Nevertheless, the degradation of the MOF matrix gives rise to an enhanced CO release rate, which is related to the presence of free adenine in the solution.

Original languageEnglish
Pages (from-to)6525-6531
Number of pages7
JournalInorganic Chemistry
Volume55
Issue number13
DOIs
Publication statusPublished - 5 Jul 2016

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