Repositorio Institucional
Repositorio Institucional
CONICET Digital
  • Inicio
  • EXPLORAR
    • AUTORES
    • DISCIPLINAS
    • COMUNIDADES
  • Estadísticas
  • Novedades
    • Noticias
    • Boletines
  • Ayuda
    • General
    • Datos de investigación
  • Acerca de
    • CONICET Digital
    • Equipo
    • Red Federal
  • Contacto
JavaScript is disabled for your browser. Some features of this site may not work without it.
  • INFORMACIÓN GENERAL
  • RESUMEN
  • ESTADISTICAS
 
Artículo

Exchange interaction between S = 1/2 centers bridged by multiple noncovalent interactions: Contribution of the individual chemical pathways to the magnetic coupling

Pérez, Ana LauraIcon ; Neuman, Nicolás IgnacioIcon ; Baggio, Ricardo Fortunato; Ramos, Carlos Alberto; Dalosto, Sergio DanielIcon ; Rizzi, Alberto Claudio; Brondino, Carlos DanteIcon
Fecha de publicación: 02/2017
Editorial: Pergamon-Elsevier Science Ltd
Revista: Polyhedron
ISSN: 0277-5387
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

We report EPR and magnetic measurements of diaqua-(pyridine-2,6-dicarboxylato)Copper(II) together with computational calculations. This compound consists of an extended lattice of magnetically equivalent copper(II) ions in which the copper centers are linked by hydrophobic interactions such as π–π, π–metal, and Y–X…π, and hydrogen bonds involving different topologies, viz., [sbnd]Cu[sbnd]Oeq…Oeq[sbnd]Cu[sbnd], [sbnd]Cu[sbnd]Oeq…Oap[sbnd]Cu[sbnd], and [sbnd]Cu[sbnd]Oeq…O[dbnd]C[sbnd]Oeq[sbnd]Cu[sbnd]. The powder EPR spectrum shows nearly axial symmetry with non-resolved hyperfine structure with the copper nucleus, suggesting the presence of intercenter isotropic exchange interactions. Single crystal EPR experiments show a single lorentzian resonance line for all the magnetic field orientations investigated, typical of an extended exchange coupled system. Susceptibility measurements showed weakly antiferromagnetically coupled Cu(II) ions (J = −0.79 (4) cm−1). Using Anderson's exchange narrowing model for the collapse of the hyperfine structure, EPR yielded |J| = 0.6 (1) cm−1. The distinct contributions of the different chemical pathways to the experimentally determined J-value are analyzed through first principle computational calculations.
Palabras clave: Computational Calculation , Copper Complex , Epr , Noncovalent Interaction , Superexchange
Ver el registro completo
 
Archivos asociados
Thumbnail
 
Tamaño: 1.179Mb
Formato: PDF
.
Descargar
Licencia
info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/58686
DOI: https://dx.doi.org/10.1016/j.poly.2016.12.018
URL: https://www.sciencedirect.com/science/article/pii/S0277538716306696
Colecciones
Articulos(CCT - SANTA FE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - SANTA FE
Citación
Pérez, Ana Laura; Neuman, Nicolás Ignacio; Baggio, Ricardo Fortunato; Ramos, Carlos Alberto; Dalosto, Sergio Daniel; et al.; Exchange interaction between S = 1/2 centers bridged by multiple noncovalent interactions: Contribution of the individual chemical pathways to the magnetic coupling; Pergamon-Elsevier Science Ltd; Polyhedron; 123; 2-2017; 404-410
Compartir
Altmétricas
 

Enviar por e-mail
Separar cada destinatario (hasta 5) con punto y coma.
  • Facebook
  • X Conicet Digital
  • Instagram
  • YouTube
  • Sound Cloud
  • LinkedIn

Los contenidos del CONICET están licenciados bajo Creative Commons Reconocimiento 2.5 Argentina License

https://www.conicet.gov.ar/ - CONICET

Inicio

Explorar

  • Autores
  • Disciplinas
  • Comunidades

Estadísticas

Novedades

  • Noticias
  • Boletines

Ayuda

Acerca de

  • CONICET Digital
  • Equipo
  • Red Federal

Contacto

Godoy Cruz 2290 (C1425FQB) CABA – República Argentina – Tel: +5411 4899-5400 repositorio@conicet.gov.ar
TÉRMINOS Y CONDICIONES