Cation Exchange Strategy for the Encapsulation of a Photoactive COReleasing Organometallic Molecule into Anionic Porous Frameworks

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URI: https://hdl.handle.net/10481/88036
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Author
Carmona Fernández, Francisco Jesús; Rodríguez Maldonado, Carmen; Barea Martínez, Elisa María; Rojas Macías, Sara; Sánchez Sánchez, Purificación; Marques, Ana. R; Romão, Carlos C.; Jeremias, Hélia; Choquesillo Lazarte, Duane; Rodríguez Navarro, Jorge Andrés
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ACS
Date
2016-06-11
Referencia bibliográfica
Inorg. Chem. 2016, 55, 13, 6525–6531
Sponsorship
The Spanish Ministry of Economy and Competitivity and UE Feder Program (projects CTQ2014-53486R and CRM Juan de la Cierva Contract), Junta de Andalucı́a (project P09-FQM-4981 and SR postdoctoral contract) and COST action CM1105 are gratefully acknowledged for generous funding. D.Ch-L thanks the support of the Intramural CSIC project 201530E011. The authors thank Alfama Inc. for providing ALF472. The National NMR Facility is supported by Fundação para a Ciencia e a Tecnologia (RECI/BBB-BQB/0230/2012). Project PTDC/QUI-BIQ/117799/2010 provided a grant to H.J.
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.
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