64407 20190709135615.0 doi 10.1016/j.carbon.2017.05.098 sideral 103385 ART-2017-103385 eng Dante, Roberto C. Nitrogen-carbon graphite-like semiconductor synthesized from uric acid 2017 Access copy available to the general public Unrestricted A new carbon-nitrogen organic semiconductor has been synthesized by pyrolysis of uric acid. This layered carbon-nitrogen material contains imidazole-, pyridine (naphthyridine)- and graphitic-like nitrogen, as evinced by infrared and X-ray photoelectron spectroscopies. Quantum chemistry calculations support that it would consist of a 2D polymeric material held together by hydrogen bonds. Layers are stacked with an interplanar distance between 3.30 and 3.36 Å, as in graphite and coke. Terahertz spectroscopy shows a behavior similar to that of amorphous carbons, such as coke, with non-interacting layers. This material features substantial differences from polymeric carbon nitride, with some characteristics closer to those of nitrogen-doped graphene, in spite of its higher nitrogen content. The direct optical band gap, dependent on the polycondensation temperature, ranges from 2.10 to 2.32 eV. Although in general the degree of crystallinity is low, in the material synthesized at 600 °C some spots with a certain degree of crystallinity can be found. info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 7.082 2017 MATERIALS SCIENCE, MULTIDISCIPLINARY 32 / 285 = 0.112 2017 Q1 T1 CHEMISTRY, PHYSICAL 25 / 146 = 0.171 2017 Q1 T1 2.226 2017 Chemistry (miscellaneous) 2017 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Chamorro-Posada, Pedro Vázquez-Cabo, José Rubiños-López, Óscar Sánchez-Árevalo, Francisco M. Huerta, Lázaro (orcid)0000-0003-2713-2786 Martín-Ramos, Pablo Universidad de Zaragoza Lartundo-Rojas, Luis Ávila-Vega, Carlos F. Rivera-Tapia, Edgar D. Fajardo-Pruna, Cristian A. Ávila-Vega, Álvaro J. Solorza-Feria, Omar 5011 500 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Area Ingeniería Agroforestal 121 (2017), 368-379 Carbon Carbon 0008-6223 1191876 http://zaguan.unizar.es/record/64407/files/texto_completo.pdf Postprint 74608 http://zaguan.unizar.es/record/64407/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:64407 articulos driver 2019-07-09-12:25:09 ARTICLE