Dynamic Control of MOF‐5 Crystal Positioning Using a Magnetic Field

Abstract

Dynamic spatial control of MOF position is obtained by incorporating carbon‐coated cobalt nanoparticles within metal organic framework (MOF)‐5 crystals. The cobalt framework composite obtained responds efficiently to magnetic stimuli. A luminescent functionality is added, showing that multifunctional MOF devices can be prepared. This new generation of adaptive material is tested as a position‐controlled molecular sensor.

Applications of magnetic metal–organic framework composites

“…This technique is often used for MOF-based composite production. Remarkable examples are the use of carbon coated metallic particles 53 for the growth of Zn based MOFs or polyvinylpyrrolidone (PVP) coated nanoparticles for the controlled growth of zeolitic imidazolate framework materials. 37 35 An innovative and fast synthesis of MOFs and MFCs was recently achieved by Kim's research group.…”

General incorporation of diverse components inside metal-organic framework thin films at room temperature

“…Afterward, to confine the growth of MOFs on the surfaces of nanoparticles, metal oxide nanostructures can be employed as a metal source that is directly converted to an MOF-surrounded composite 43,44 . Similarly, Falcaro et al have applied functional nanoparticle-encapsulated a-hopeite as a nucleating agent to position and encapsulate the functional components in MOF-5 with core/shell structures 45,46 . However, most of the aforementioned methods require relatively high temperatures and long reaction times 27,34,[38][39][40][41][42][43][44][45][46] , and the obtained NP/MOF composite powders 27,34,[38][39][40][41][42][43][44] are not suitable for thin film devices 10,43,44 .…”

Fe3O4@HKUST-1 and Pd/Fe3O4@HKUST-1 as magnetically recyclable catalysts prepared via conversion from a Cu-based ceramic

“…[8][9][10][11][12][13][14][15][16][17] While there are a large number of reports describing different methods for successfully combining exogenous species into MOFs, [18][19][20][21] the encapsulation of nanoparticles is particularly promising due to the innovative functional properties that cannot be obtained from the parent MOFs alone. [22][23][24][25][26] Typically, the encapsulation of nanoparticles is achieved through the introduction of precursors using solution impregnation, gas-phase infiltration or a solid-phase method, and subsequent conversion into the corresponding functional components inside the frameworks. [27][28][29] However, in this two-step approach, free nanoparticles are often present which need to be removed from the system.…”