Photoswitchable metal organic frameworks: turn on the lights and close the windows

Abstract

Progress and challenges in the development of photo-responsive metal organic frameworks.

Tunable molecular separation by nanoporous membranes

“…Furthermore, photoswitchable molecular scaffolds20 and gel assemblies21 were realized utilising azobenzene photoisomerization. Also, for MOFs in the form of powders or thin films, photoswitchable moieties222324 were used to demonstrate the remote-control of the MOF properties like colour25, release262728 and adsorption2930313233 of the guest molecules, in particular of CO 2 (refs 32, 33). While in most cases illumination with ultraviolet-light was needed, linker molecules that can be switched with visible light were used for the MOF preparation recently34.…”

Atomic/Molecular Layer Deposited Iron–Azobenzene Framework Thin Films for Stimuli‐Induced Gas Molecule Capture/Release

“…[11,12] These efforts can be divided into three groups depending on whether the azobenzene moiety is accommodated as 1) the actual framework linker, [13,14] 2) as ide-group pendant to the linker, [15,16] or 3) ag uest species in the pores incorporated either during the synthesis or through ap ostsynthesis treatment. [19][20][21][22] Apossible solution could be to fabricate the azobenzenebased metal-organic material in ap olycrystalline form (preferably consisting of small crystallites) on top of as upporting substrate to allow more flexibility for the bond rearrangements during the isomerization. [19][20][21][22] Apossible solution could be to fabricate the azobenzenebased metal-organic material in ap olycrystalline form (preferably consisting of small crystallites) on top of as upporting substrate to allow more flexibility for the bond rearrangements during the isomerization.…”

Photoresponsive spiropyran-functionalised MOF-808: postsynthetic incorporation and light dependent gas adsorption properties

“…6 Metal-organic frameworks (MOFs) are a class of multidimensional porous networks composed of organic struts and inorganic nodes, and can be systematically tuned in terms of chemical composition and precise arrangement. [10][11][12] These studies have focused extensively on azobenzene frameworks, [13][14][15][16][17][18][19] as well as on diarylethenes 20,21 and others. [10][11][12] These studies have focused extensively on azobenzene frameworks, [13][14][15][16][17][18][19] as well as on diarylethenes 20,21 and others.…”

“…[7][8][9] Recently, there has been a signicant interest in developing photoresponsive MOFs for light-modulated guest separation/storage; this process offers a potential low-energy alternative for postcombustion ue gas separation. 10,22 As a photochromic moiety, spiropyrans in MOFs are understudied, with only one example reported to date, for a MOF incorporating a non-covalently impregnated spiropyran. 10,22 As a photochromic moiety, spiropyrans in MOFs are understudied, with only one example reported to date, for a MOF incorporating a non-covalently impregnated spiropyran.…”