Rubio-Giménez Víctor, Carraro Francesco, Hofer Sebastian, Fratschko Mario, Stassin Timothée, Rodríguez-Hermida Sabina, Schrode Benedikt, Barba Luisa, Resel Roland, Falcaro Paolo, Ameloot Rob
Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy (cMACS), KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
Institute of Physical and Theoretical Chemistry, Graz University of Technology Stremayrgasse 9/Z2 8010 Graz Austria
CrystEngComm. 2024 Feb 2;26(8):1071-1076. doi: 10.1039/d3ce01296d. eCollection 2024 Feb 20.
Precise control over the crystalline phase and crystallographic orientation within thin films of metal-organic frameworks (MOFs) is highly desirable. Here, we report a comparison of the liquid- and vapour-phase film deposition of two copper-dicarboxylate MOFs starting from an oriented metal hydroxide precursor. X-ray diffraction revealed that the vapour- or liquid-phase reaction of the linker with this precursor results in different crystalline phases, morphologies, and orientations. Pole figure analysis showed that solution-based growth of the MOFs follows the axial texture of the metal hydroxide precursor, resulting in heteroepitaxy. In contrast, the vapour-phase method results in non-epitaxial growth with uniplanar texture only.
精确控制金属有机框架(MOF)薄膜内的晶相和晶体取向是非常必要的。在此,我们报道了从取向金属氢氧化物前驱体开始的两种二羧酸铜MOF的液相和气相薄膜沉积的比较。X射线衍射表明,连接体与该前驱体的气相或液相反应会导致不同的晶相、形态和取向。极图分析表明,MOF基于溶液的生长遵循金属氢氧化物前驱体的轴向织构,从而导致异质外延生长。相比之下,气相法仅导致具有单平面织构的非外延生长。