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

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• 作者：Francisco J. Carmona ; Sara Rojas ; Purificación Sánchez ; Hélia Jeremias ; Ana R. Marques ; Carlos C. Romão ; Duane Choquesillo-Lazarte ; Jorge A. R. Navarro ; Carmen R. Maldonado ; Elisa Barea
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：July 5, 2016
• 年：2016
• 卷：55
• 期：13
• 页码：6525-6531
• 全文大小：365K
• 年卷期：0
• ISSN：1520-510X

文摘

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.