Characterization of Main Phase in Kxp-Terphenyl and Its Largest Congener Kxpoly(p-phenylene): A Report of Their Magnetic and Electric Properties

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Title: Characterization of Main Phase in Kxp-Terphenyl and Its Largest Congener Kxpoly(p-phenylene): A Report of Their Magnetic and Electric Properties
Authors: Carrera, Manuel | McDonald, James L. | Untiedt, Carlos | García-Hernández, Mar | Mompean, Federico | Vergés Brotons, José Antonio | Guijarro, Albert
Research Group/s: Nuevos Materiales y Catalizadores (MATCAT) | Grupo de Nanofísica
Center, Department or Service: Universidad de Alicante. Departamento de Química Orgánica | Universidad de Alicante. Departamento de Física Aplicada | Universidad de Alicante. Instituto Universitario de Síntesis Orgánica
Keywords: Kxp-Terphenyl | Kxpoly(p-phenylene) | Magnetic and electric properties
Knowledge Area: Química Orgánica | Física de la Materia Condensada
Issue Date: 14-Feb-2019
Publisher: American Chemical Society
Citation: The Journal of Physical Chemistry C. 2019, 123(9): 5264-5272. doi:10.1021/acs.jpcc.8b12475
Abstract: The report of the Meissner effect in annealed samples of K3Tp (Tp = p-terphenyl) above 120 K has raised the interest in this deceptively simple material concerning superconductivity. We have investigated the structural integrity of the Tp framework in the annealed samples of KxTp at increasing processing time and temperature T. Our experimental studies show that both K2Tp and K3Tp mixing stoichiometries have identical Raman (solid state) and UV–vis (1,2-dimethoxyethane solution) spectra, being consistent with the molecular dianion by density functional theory and time-dependent density functional theory simulations. Magnetization vs T plots show no signs of superconductivity and neither do conductance vs T plots. Searching for potentially active minor byproducts formed during thermal processing, the role of K-doped poly(p-phenylene) has been examined, but it does not seem to explain the reported effects either. Further efforts are needed to explain the nature of this elusive phenomenon.
Sponsor: Financial support by the Spanish Ministry of Economy and Competitiveness (FIS2015-64222-C2-1-P, MAT2014-52405-C2-2-R, and MAT2016-78625-C2-1-2-P), the Generalitat Valenciana (Grant PROMETEO/2017/139), and the University of Alicante (VIGROB-285) is gratefully acknowledged. M.C. thanks the VIDI of the University of Alicante for a predoctoral grant.
ISSN: 1932-7447 (Print) | 1932-7455 (Online)
DOI: 10.1021/acs.jpcc.8b12475
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2019 American Chemical Society
Peer Review: si
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Appears in Collections:INV - MATCAT - Artículos de Revistas
INV - Grupo de Nanofísica - Artículos de Revistas

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