doi:10.1016/j.jcis.2021.01.030engAndrés, M.A.Fontaine, P.Goldmann, M.Serre, C.Roubeau, O.Gascón, I.Solvent-exchange process in MOF ultrathin films and its effect on CO2 and methanol adsorptionART-2021-123150Metal-organic framework (MOF) activation is crucial for the use of MOFs in several applications and solvent-exchange process is a necessary step in many activation methods. In this contribution, we have explored in situ MOF monolayer film formation at the air-water interface. Nanoparticles (NPs) of the Al trimesate MIL-96(Al) retain chloroform into their micropores, which considerably diminishes the CO2 adsorption capacity of MOF films. However, a solvent-exchange process between chloroform and water increases CO2 film adsorption capacity by 30%. Total Reflection X-Ray Fluorescence (TRXF) allows studying the kinetics of this process at the air-water interface, that strongly depends on the NP size. The conclusions derived from in situ studies allow optimizing the ex situ activation procedure of MIL-96(Al) films deposited onto quartz crystal microbalance (QCM) substrates in order to maximize CO2 and methanol adsorption.2021http://zaguan.unizar.es/record/12955810.1016/j.jcis.2021.01.030http://zaguan.unizar.es/record/129558oai:zaguan.unizar.es:129558info:eu-repo/grantAgreement/ES/DGA-FEDER/E31-17Rinfo:eu-repo/grantAgreement/EC/FP7/608490/EU/Energy efficient MOF-based Mixed Matrix Membranes for CO2 Capture/M4CO2info:eu-repo/grantAgreement/ES/MEC/FPU14-05367info:eu-repo/grantAgreement/ES/MINECO/MAT2016-78257-Rinfo:eu-repo/grantAgreement/ES/UZ/JIUZ-2015-CIE-02Journal of Colloid and Interface Science 590 (2021), 72-81by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess