agnetic Properties of a Polyfluorene Derivative Metallopolymer Containing Neodymium Ion

Autor(es)

Santana, Alisson J. ^[1] ; Turchetti, Denis A. ^[1] ; Zanlorenzi, Cristiano ^[1] ; dos Santos, Jose C. R. ^[2] ; de Oliveira, Adilson J. A. ^[2] ; Akcelrud, Leni ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Parana, Paulo Scarpa Polymer Lab LaPPS, POB 19081, BR-81531990 Curitiba, Parana - Brazil

^[2] Univ Fed Sao Carlos, Phys Dept, POB 676, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MACROMOLECULAR CHEMISTRY AND PHYSICS; v. 223, n. 3 DEC 2021.
• Citações Web of Science: 0

Resumo

The magnetic properties of a polyfluorene derivative, [Poly{[}9,9'-dihexylfluorene-2,7-yl)-3,8-(1,10-phenanthroline)]] and its complexes with neodymium ions are explored and discussed in the light of the macromolecular configuration and photophysical properties. The pristine noncomplexed material is a diamagnetic material, and the introduction of Nd atoms in the polymer leads to a paramagnetic behavior over the entire temperature range. The prominent role of the morphology is demonstrated by comparison of two forms, with different ligands to the metal: one with bulky beta-diketone groups and another with small chorine as ligands. The large groups hinder interchain interaction, whereas the smaller salt forms favored interchain pi-stacking, providing a better interaction of the magnetic field with the polymer backbone, resulting in enhanced magnetic properties. The form with the beta-diketone groups exhibits a paramagnetic behavior whereas the one in the salt form presents ferromagnetic behavior at room temperature. This contribution brings solid confirmation to the importance of interchain interaction in the magnetic properties of conjugated polymers, opening a new way to the obtainment of magnetic conjugated polymers. (AU)

• Processo FAPESP: 09/54082-2 - EMU: projeto para aquisição de um magnetômetro de amostra vibrante que utiliza como sensor um dispositivo supercondutor de interferência quântica acoplado (Squid-VSM) com circuito fechado de criogenia
• Beneficiário: Ernesto Chaves Pereira de Souza
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs