Enhanced proton conductivity in a layered coordination polymer
authors Mendes, RF; Barbosa, P; Domingues, EM; Silva, P; Figueiredo, F; Paz, FAA
nationality International
journal CHEMICAL SCIENCE
keywords METAL-ORGANIC FRAMEWORKS; LUMINESCENT; CONDUCTORS; DESIGN; MOF
abstract [Gd(H(4)nmp)(H2O)(2)]Cl center dot 2H(2)O (1) converts into [Gd-2(H(3)nmp)(2)]center dot xH(2)O (2) (x= 1 to 4) with a notable increase in proton conductivity.1is a charged layered material counter balanced by chloride ions, with proton conductivity values of 1.23 x 10(-5)S cm(-1)at 98% relative humidity (RH) and 40 degrees C. At 98% RH and 94 degrees C the observed conductivity is 0.51 S cm(-1), being to date one of the highest values ever reported for a proton-conducting coordination polymer. This increase is observed during a structural transformation into2that occurs at high temperature and RH. While this remarkable conductivity is observed only after transformation and by maintaining high humidity conditions, as-synthesized2also shows a conductivity value of 3.79 x 10(-2)S cm(-1)at 94 degrees C and 98% RH, still ranked as one of the highest reported values. Moreover, it is shown that the key factor for high proton conduction is the unusual dynamic structural transformation with water insertion and release of chloride ions.
publisher ROYAL SOC CHEMISTRY
issn 2041-6520
year published 2020
volume 11
issue 24
beginning page 6305
ending page 6311
digital object identifier (doi) 10.1039/d0sc01762k
web of science category Chemistry, Multidisciplinary
subject category Chemistry
unique article identifier WOS:000542898000019
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 9.346
5 year journal impact factor 8.945
category normalized journal impact factor percentile 88.418
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg