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dc.contributor.authorSen, Unal
dc.contributor.authorErkartal, Mustafa
dc.contributor.authorKung, Chung-Wei
dc.contributor.authorRamani, Vijay
dc.contributor.authorHupp, Joseph T
dc.contributor.authorFarha, Omar K.
dc.descriptionThe work performed at Abdullah Gul University was funded by The Scientific and Technological Research Council of Turkey TUBITAK under the contract No. 214M397. For work done in Evanston, we gratefully acknowledge support from the U.S. Dept. of Energy, Office of Science, Office of Basic Energy Sciences (grant no. DE-FG02-87ER13808) and Northwestern University.en_US
dc.description.abstractHerein, a room temperature chemical process to synthesize functional, hollow nanostructures from zeolitic imidazolate framework-8 (ZIF-8) and poly(vinylphosphonic acid) (PVPA) is reported. Syntheses are initiated by physically blending the components a process that is accompanied first by encapsulation of ZIF-8 crystallites by PVPA and then by fragmentation of the crystallites. The fragmentation process is driven by partial displacement of the methyl-imidazolate ligands of Zn(II) in ZIF-8 by phosphonate groups on PVPA. Differences in rates of diffusion for the components of the reactive mixture yield a Kirkendall-like effect that is expressed as a hollow-particle morphology. The obtained hollow nanostructures feature hybrid shells containing PVPA, ZIF-8, and their cross-reacted products. The hybrid structures display substantial proton conductivities that increase with increasing temperature, even under the anhydrous conditions prevailing at temperatures above the boiling point of water. For example, at T = 413 K the proton conductivity of ZIF-8@PVPA reaches 3.2 (+/- 0.12) x 10(-3) S cm(-1), a value comparatively higher than that for PVPA (or ZIF-8) in isolation. The high value may reflect the availability in the hybrid structures of free (and partially free), amphoteric imidazole species, and their hydrogen-bonding interactions with phosphonate and/or phosphonic acid units. The persistence of ample conductivity at high temperature reflects the elimination of phosphonic acid group dehydration and dimerization-an effect that strikingly degrades the conductivity of pure PVPA under anhydrous conditions.en_US
dc.description.sponsorshipTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) 214M397 United States Department of Energy (DOE) DE-FG02-87ER13808 Northwestern Universityen_US
dc.publisherAMER CHEMICAL SOC1155 16TH ST, NW, WASHINGTON, DC 20036en_US
dc.subjectfuel cellen_US
dc.subjectproton conductivityen_US
dc.subjecthollow nanostructuresen_US
dc.titleProton Conducting Self-Assembled Metal-Organic Framework/Polyelectrolyte Hollow Hybrid Nanostructuresen_US
dc.contributor.departmentAGÜ, Mühendislik Fakültesi, Makine Mühendisliği Bölümüen_US
dc.contributor.institutionauthorSen, Unal
dc.contributor.institutionauthorErkartal, Mustafa
dc.identifier.volumeVolume 8 Issue 35 Page 23015-23021en_US
dc.relation.publicationcategoryMakale - Uluslararası - Editör Denetimli Dergien_US

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