CORRELATIONS BETWEEN STRUCTURE AND MAGNETIC PROPERTIES OF NEODIMIUN CONTAINING POLYMERS

Sandra de Melo Cassemiro; leni campos akcelrud

Todos os Trabalhos

Trabalho

Título do Trabalho

CORRELATIONS BETWEEN STRUCTURE AND MAGNETIC PROPERTIES OF NEODIMIUN CONTAINING POLYMERS

Autores

Sandra de Melo Cassemiro
leni campos akcelrud

Modalidade

Pôster - resumo

Área temática

Dispositivos optoeletrônicos

Data de Publicação

27/05/2026

País da Publicação

Brasil

Idioma da Publicação

pt-BR

Página do Trabalho

https://www.even3.com.br/anais/workshop-do-ineo-2026/1460034-correlations-between-structure-and-magnetic-properties-of-neodimiun-containing-polymers

ISBN

978-65-272-2467-9

Palavras-Chave

rare earths, metallopolymers, neodymium, magnetic properties

Resumo

Rare earth elements (REEs) have become extremely important in various sectors, including energy, electronics, defense, and quantum technology. The unique structure of the 4f electron shell of the lanthanide elements confers exceptional magnetic, optical, and catalytic properties, making REEs indispensable for numerous applications. These elements are widely used in permanent magnets, rechargeable batteries, optical sensors, functional coatings, catalysts, and other high-performance materials. This enables the development of products such as wind turbines, electric vehicles, low-energy LED lighting, and high-resolution displays [1,2]. Considering the unique advantages of rare earth elements (REEs), this work aimed at the synthesis of metallopolymers with alternating structures. Among the synthesized materials, particular emphasis is given to Poly[9,9'-dioctyl-2,7-fluorene)-3,8-(1,10-phenanthroline)] containing neodymium ions (LaPPS59Nd³?). The structures were designed to contain different proportions of neodymium (Nd) units in the polymer chain, in order to induce or favor interactions that promote greater coupling and local organization of magnetic moments, depending on the mode of metal incorporation into the polymer matrix, consequently resulting in improved magnetic properties. The synthesis was carried out following conventional routes for obtaining conjugated polymers via Suzuki cross-coupling polycondensation, with the necessary adaptations for the desired structure. The structures of the polymers LaPPS59 and LaPPS59Nd³? were confirmed by infrared spectroscopy and ¹H and ¹³C nuclear magnetic resonance. The neodymium content in the material was estimated from the inorganic residue observed in the thermogravimetric analysis (TGA) curves, indicating successful incorporation of the metal into the polymer matrix [3]. The analysis of the photophysical properties of the synthesized compound allowed the identification of absorption and emission bands, also revealing material disaggregation after complexation. Magnetic measurements indicated that LaPPS59 (pure polymer) exhibits diamagnetic behavior. After complexation with Nd³? ions, the resulting metallopolymer (LaPPS59Nd³?) exhibited ferromagnetic behavior at room temperature. However, when complexation was performed with Nd (DBM)3, leading to the loss of interchain p–p stacking, the ferromagnetic component was suppressed, and the samples displayed paramagnetic behavior. References: [1] Liang B, Zhu P, Gu J, Zeng X, Yuan W, Hu H, Huang L, Xiao B, Advances in ion-imprinted polymer technology for rare earth element separation: A review, Journal of Rare Earths. https://doi.org/10.1016/j.jre.2025.12.004. [2] Chun-Hua Yan, Xiaowei Huang, Review on progress of rare earth science and technology in 2024, Journal of Rare Earths, 43,10, 2025. https://doi.org/10.1016/j.jre.2025.08.003. [3] Alisson J. Santana, Denis A. Turchetti, Cristiano Zanlorenzi, José C. R. dos Santos, Adilson. J. A. de Oliveira, Leni Akcelrud. Magnetic Properties of a Polyfluorene Derivative Metallopolymer Containing Neodymium Ions. Macromol. Chem. Phys. 2022, 223, 2100289. https://doi.org/10.1002/macp.202100289. Acknowledgments: This work was supported by the Brazilian National Council for Scientific and Technological Development (FAPESP - process nº 2025/27044-5 e CNPq - process: 408449/2024-1) within the program of the National Institute for Science and Technology on Organic Electronics (INEO).

Título do Evento: Workshop do INEO 2026
Cidade do Evento: Nazaré Paulista
Título dos Anais do Evento: Anais do Workshop do INEO 2026
Nome da Editora: Even3
Meio de Divulgação: Meio Digital

Como citar

CASSEMIRO, Sandra de Melo; AKCELRUD, leni campos. CORRELATIONS BETWEEN STRUCTURE AND MAGNETIC PROPERTIES OF NEODIMIUN CONTAINING POLYMERS.. In: Anais do Workshop do INEO 2026. Anais...Nazaré Paulista(SP) Hotel Estância Atibainha, 2026. Disponível em: https//www.even3.com.br/anais/workshop-do-ineo-2026/1460034-CORRELATIONS-BETWEEN-STRUCTURE-AND-MAGNETIC-PROPERTIES-OF-NEODIMIUN-CONTAINING-POLYMERS. Acesso em: 10/08/2026