RT Journal Article
T1 Improving the mesomorphism in bispyrazolate Pd(II) metallomesogens: an efficient platform for ionic conduction
A1 Cuerva de Alaiz, Cristian
A1 Cano Esquivel, María Mercedes
A1 Schmidt, Rainer
AB The introduction of structural asymmetry in metallomesogens is an established strategy to improve their mesomorphic behaviour in terms of lower melting temperatures and higher stability ranges of the mesophase, which is particularly important for metallomesogens that have potential application as electrolytes that require wide operational temperature ranges. Here in this work, a novel series of unsymmetrical bis(isoquinolinylpyrazolate)palladium(ii) compounds bearing four alkyl side-chains with different lengths are described. Rectangular and hexagonal columnar mesophases were formed with low melting temperatures of 42-45 degrees C in most cases, whereas the clearing temperatures reached values up to 412 degrees C. The charge transport properties have been studied by complex impedance spectroscopy, showing that the mesophase favours proton conduction in the absence of water or humidity. The exceptional thermal stability of these species makes them promising candidates to act as a platform for ionic conduction via the nanochannels originated in the columnar mesophases. The results presented confirm that introducing structural asymmetry in the Pd(ii) metallomesogens studied is a valid strategy to enhance the liquid crystalline properties, which opens new ways to develop water-free electrolytes based on unsymmetrical bis(isoquinolinylpyrazolate) Pd(ii) compounds for potential applications such as proton exchange membranes (PEMs).
PB Royal Society of Chemistry
SN 1477-9226
YR 2023
FD 2023-02-07
LK https://hdl.handle.net/20.500.14352/93817
UL https://hdl.handle.net/20.500.14352/93817
LA eng
NO Cuerva, C., Cano, M., & Schmidt, R. (2023). Improving the mesomorphism in bispyrazolate Pd (II) metallomesogens: an efficient platform for ionic conduction. Dalton Transactions, 52(15), 4684-4691.
NO Ministerio de Economía y Competitividad (España)
NO Instituto de Salud Carlos III
NO Comunidad de Madrid
NO Universidad Complutense de Madrid
DS Docta Complutense
RD 22 abr 2025