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

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dc.contributor.author Roy, Syamantak
dc.contributor.author Suresh, Venkata M.
dc.contributor.author Maji, Tapas Kumar
dc.date.accessioned 2017-01-24T06:25:43Z
dc.date.available 2017-01-24T06:25:43Z
dc.date.issued 2016
dc.identifier.citation Roy, S.; Suresh, V. M.; Maji, T. K., Self-cleaning MOF: realization of extreme water repellence in coordination driven self-assembled nanostructures. Chemical Science 2016, 7 (3), 2251-2256 http://dx.doi.org/10.1039/c5sc03676c en_US
dc.identifier.citation Chemical Science en_US
dc.identifier.citation 7 en_US
dc.identifier.citation 3 en_US
dc.identifier.issn 2041-6520
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/2153
dc.description Open Access en_US
dc.description.abstract Bio-inspired self-cleaning surfaces have found industrial applications in oil-water separation, stain resistant textiles, anti-biofouling paints in ships etc. Interestingly, self-cleaning metal-organic framework (MOF) materials having high water contact angles and corrosion resistance have not been realized so far. To address this issue, we have used the fundamentals of self-assembly to expose hydrophobic alkyl chains on a MOF surface. This decreases the surface free energy and hence increases hydrophobicity. Coordination directed self-assembly of dialkoxyoctadecyl-oligo-(p-phenyleneethynylene) dicarboxylate (OPE-C-18) with Zn-II in a DMF/H2O mixture leads to a three dimensional supramolecular porous framework {Zn(OPE-C-18)center dot 2H(2)O} (NMOF-1) with nanobelt morphology. Inherently superhydrophobic and self-cleaning NMOF-1 has high thermal and chemical stability. The periodic arrangement of 1D Zn-OPE-C-18 chains with octadecyl alkyl chains projecting outward reduces the surface free energy leading to superhydrophobicity in NMOF-1 (contact angle: 160-162 degrees). The hierarchical surface structure thus generated, enables NMOF-1 to mimic the lotus leaf in its self-cleaning property with an unprecedented tilt angle of 2 degrees. Additionally, superhydrophobicity remains intact over a wide pH range (1-9) and under high ionic concentrations. We believe that such a development in this field will herald a new class of materials capable of water repellent applications. en_US
dc.description.uri 2041-6539 en_US
dc.description.uri http://dx.doi.org/10.1039/c5sc03676c en_US
dc.language.iso English en_US
dc.publisher Royal Society of Chemistry en_US
dc.rights @Royal Society of Chemistry, 2016 en_US
dc.subject Chemistry en_US
dc.subject Metal-Organic Frameworks en_US
dc.subject Superhydrophobic Surfaces en_US
dc.subject Separation en_US
dc.subject Polymer en_US
dc.subject Wettability en_US
dc.subject Coatings en_US
dc.subject Design en_US
dc.subject Films en_US
dc.subject Architecture en_US
dc.subject Lithography en_US
dc.title Self-cleaning MOF: realization of extreme water repellence in coordination driven self-assembled nanostructures en_US
dc.type Article en_US


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