Self-cleaning MOF: realization of extreme water repellence in coordination driven self-assembled nanostructures

Abstract

A superhydrophobic self-cleaning MOF nanostructure has been synthesized using a unique ligand design strategy and coordination directed self-assembly. The material has hierarchical surface roughness and is stable under extreme corrosive conditions.

Shape Controlled Hierarchical Porous Hydrophobic/Oleophilic Metal‐Organic Nanofibrous Gel Composites for Oil Adsorption

“…[21][22][23][24][25][26][27][28] A great effort has been dedicated to fabricating porous materials with hierarchical porosity with a large specific surface area and being water resistant. Stable hydrophobic MOFs were prepared using hydrophobic functional (F and alkyl) organic linkers or through postsynthetic modification of MOF using hydrophobic groups; although, one cannot rely on many typical MOFs for the oil adsorption due to their microchannels.…”

“…Stable hydrophobic MOFs were prepared using hydrophobic functional (F and alkyl) organic linkers or through postsynthetic modification of MOF using hydrophobic groups; although, one cannot rely on many typical MOFs for the oil adsorption due to their microchannels. [26][27][28][29][30][31][32][33] In this work, we are reporting a facile one-pot synthesis under solvothermal conditions of hydrophobic/oleophilic composite gels denoted as FGO@MOG. Our aim is to develop a simple procedure to synthesize hierarchical composites based on metalorganic porous gels (MOGs), aiming for quick uptake of oils and high stabilities in various organic solvents.…”

Switchable Surface Hydrophobicity–Hydrophilicity of a Metal–Organic Framework

“…[3,4] However,w hen such lotus-leaf-like surfaces are built from materials that respond to specific stimuli, they can exhibit switchable wettability.F or instance, alotus-leaf-like surface built from the photosensitive material TiO 2 can exhibit light-dependent switching. [13] Some advances have been made to this end. [12] Herein, we report that metal-organic frameworks (MOFs) (also known as porous coordination polymers [PCPs]) can be an ovel class of responsive materials that exhibit switching of their crystal surface between hydrophobic and superhydrophilic properties.R esearchers have recently begun to investigate hydrophobic and superhydrophobic MOFs to enhance the aqueous stability of the MOFs and enable new applications (for example,self-cleaning).…”

Hydrophobic Metal–Organic Frameworks: Assessment, Construction, and Diverse Applications

“…The MOFs with a superhydrophobic external surface are promising materials for self‐cleaning coatings. In 2016, Roy et al reported a superhydrophobic and self‐cleaning MOF, [Zn(ope‐C 18 )(H 2 O) 2 ] (NMOF‐1), which was synthesized from the solvothermal reaction of Zn 2+ ions and the ligand H 2 ope‐C 18 , a dicarboxylic acid with long octadecyl alkyl chains . The crystal structure of NMOF‐1 was believed to consist of 1D coordination chains; in this configuration, Zn 2+ ions are coordinated with four carboxylate O atoms from two ope‐C 18 2− ligands and two coordinated water molecules, and each ope‐C 18 2− ligand is bridging two Zn 2+ ions.…”