English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/186265
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Water-free proton conduction in discotic pyridylpyrazolate-based Pt(II) and Pd(II) metallomesogens

AuthorsCuerva, Cristián; Campo, José A.; Cano, Mercedes; Sanz, J.; Sobrados, Isabel ; Díez-Gómez, Virginia ; Rivera-Calzada, Alberto; Schmidt, Rainer
Issue Date18-Jul-2016
PublisherAmerican Chemical Society
CitationInorganic Chemistry 55(14): 6995-7002 (2016)
AbstractIn this work we report on water-free proton conductivity in liquid-crystal pyridylpyrazolate-based Pt(II) and Pd(II) complexes [M(pz)] (pz = 3-(3,5-dialkyloxyphenyl)-5-(pyridin-2-yl)pyrazolate, R(n,n) = CH(OCH); n = 4, 12, 16, M = Pd; n = 12, M = Pt) with potential application as electrolyte materials in proton exchange membrane fuel cells. The columnar ordering of the complexes in the liquid-crystalline phase opens nanochannels, which are used for fast proton exchange as detected by impedance spectroscopy and NMR. The NMR spectra indicate that the proton conduction mechanism is associated with a novel C-H···N proton transfer, which persists above the clearing point of the material. The highest conductivity of ∼0.5 μS cm at 180 °C with an activation energy of 1.2 eV is found for the Pt(II) compound in the mesophase. The Pd(II) complexes with different chain length (n = 4, 12, and 16) show lower conductivity but smaller activation energies, in the range of 0.74-0.93 eV.
Publisher version (URL)https://doi.org/10.1021/acs.inorgchem.6b00728
URIhttp://hdl.handle.net/10261/186265
Identifiersdoi: 10.1021/acs.inorgchem.6b00728
e-issn: 1520-510X
issn: 0020-1669
Appears in Collections:(ICMM) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.