High proton conduction behavior in 12-connected 3D porous lanthanideorganic frameworks and their polymer compositesElectronic supplementary information (ESI) available: Tables S1S3, Fig. S1S13. CCDC 1563406 (1) and 1563408 (2) contain the supplementary crystallographic data for this paper. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c8ce00476e

High proton conduction behavior in 12-connected 3D porous lanthanideorganic frameworks and their... Two novel lanthanideorganic frameworks, {[Ln3(bpydb)3(HCOO)(OH)2(DMF)]3DMFxH2O}n (Ln = Eu3+ (1) and x = 2; Tb3+ (2) and x = 1; bpydbH2 is 4,4-(4,4-bipyridine-2,6-diyl) dibenzoic acid; DMF denotes N,N-dimethylformamide), have been synthesized and structurally characterized. Topological analysis reveals that 1 and 2 are 12-connected frameworks with an fcu topology, which are based on rod-shaped {Ln6} as 12-connected nodes. AC impedance analysis shows that the proton conductivity of 1 and 2 reaches up to 1.7 104 S cm1 at 325 K and 1.1 104 S cm1 at 334 K, respectively, under 98% RH. Furthermore, the polymer composite membranes of poly(vinyl alcohol) (PVA) and 1 or 2 as fillers with different mass percentages (X%, with the composite membrane denoted as 1@PVA-X or 2@PVA-X) were fabricated. The proton conductivities of both 1@PVA-10 and 2@PVA-10 are higher than those of 1 and 2 under the same conditions, which can be interpreted that the PVA polymer can provide a continuous proton transfer pathway for 1 and 2. To the best of our knowledge, it is the first composite based on LnMOFs and a polymer as proton exchange membranes. This research may contribute to the further development of LnMOFs in the field of proton exchange membranes in fuel cells. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png CrystEngComm Royal Society of Chemistry

High proton conduction behavior in 12-connected 3D porous lanthanideorganic frameworks and their polymer compositesElectronic supplementary information (ESI) available: Tables S1S3, Fig. S1S13. CCDC 1563406 (1) and 1563408 (2) contain the supplementary crystallographic data for this paper. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c8ce00476e

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Publisher
Royal Society of Chemistry
Copyright
This journal is © The Royal Society of Chemistry
ISSN
1466-8033
D.O.I.
10.1039/c8ce00476e
Publisher site
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Abstract

Two novel lanthanideorganic frameworks, {[Ln3(bpydb)3(HCOO)(OH)2(DMF)]3DMFxH2O}n (Ln = Eu3+ (1) and x = 2; Tb3+ (2) and x = 1; bpydbH2 is 4,4-(4,4-bipyridine-2,6-diyl) dibenzoic acid; DMF denotes N,N-dimethylformamide), have been synthesized and structurally characterized. Topological analysis reveals that 1 and 2 are 12-connected frameworks with an fcu topology, which are based on rod-shaped {Ln6} as 12-connected nodes. AC impedance analysis shows that the proton conductivity of 1 and 2 reaches up to 1.7 104 S cm1 at 325 K and 1.1 104 S cm1 at 334 K, respectively, under 98% RH. Furthermore, the polymer composite membranes of poly(vinyl alcohol) (PVA) and 1 or 2 as fillers with different mass percentages (X%, with the composite membrane denoted as 1@PVA-X or 2@PVA-X) were fabricated. The proton conductivities of both 1@PVA-10 and 2@PVA-10 are higher than those of 1 and 2 under the same conditions, which can be interpreted that the PVA polymer can provide a continuous proton transfer pathway for 1 and 2. To the best of our knowledge, it is the first composite based on LnMOFs and a polymer as proton exchange membranes. This research may contribute to the further development of LnMOFs in the field of proton exchange membranes in fuel cells.

Journal

CrystEngCommRoyal Society of Chemistry

Published: May 17, 2018

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