Tejedor Inés, Andrés Miguel A, Carné-Sánchez Arnau, Arjona Mónica, Pérez-Miana Marta, Sánchez-Laínez Javier, Coronas Joaquín, Fontaine Philippe, Goldmann Michel, Roubeau Olivier, Maspoch Daniel, Gascón Ignacio
Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC and Universidad de Zaragoza, Zaragoza 50009, Spain.
Departamento de Química Física, Universidad de Zaragoza, Zaragoza 50009, Spain.
ACS Appl Mater Interfaces. 2022 Jun 3;14(23):27495-506. doi: 10.1021/acsami.2c06123.
The formation of ultrathin films of Rh-based porous metal-organic polyhedra (Rh-MOPs) by the Langmuir-Blodgett method has been explored. Homogeneous and dense monolayer films were formed at the air-water interface either using two different coordinatively alkyl-functionalized Rh-MOPs (HRhMOP(diz) and HRhMOP(oiz)) or by incorporation of aliphatic chains to the axial sites of dirhodium paddlewheels of another Rh-MOP (OHRhMOP) at the air-liquid interface. All these Rh-MOP monolayers were successively deposited onto different substrates in order to obtain multilayer films with controllable thicknesses. Aliphatic chains were partially removed from HRhMOP(diz) films post-synthetically by a simple acid treatment, resulting in a relevant modification of the film hydrophobicity. Moreover, the CO/N separation performance of Rh-MOP-supported membranes was also evaluated, proving that they can be used as selective layers for efficient CO separation.
人们已经探索了通过朗缪尔-布洛杰特方法制备基于铑的多孔金属有机多面体（Rh-MOPs）超薄膜的方法。使用两种不同的具有配位烷基官能化的Rh-MOPs（HRhMOP(diz)和HRhMOP(oiz)），或者通过在气液界面将脂肪族链引入另一种Rh-MOP（OHRhMOP）的二铑桨轮轴向位点，在空气-水界面形成了均匀且致密的单层膜。所有这些Rh-MOP单层膜都依次沉积在不同的基底上，以获得具有可控厚度的多层膜。通过简单的酸处理在合成后从HRhMOP(diz)膜中部分去除脂肪族链，导致膜疏水性发生相关改变。此外，还评估了Rh-MOP支撑膜的CO/N分离性能，证明它们可用作高效CO分离的选择性层。
