Inorganic-organic hybrid materials based on the intercalation of radical cations: 2-(4-N-methylpyridinium)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl-3-N-oxide in fluoromica clay

Autor(es)

Klabunde, Sina ; Doerenkamp, Carsten ; de Oliveira, Marcos, Jr. ; Zeng, Zhaoyang ; Eckert, Hellmut

• Tipo de documento: Artigo Científico
• Fonte: ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS; v. 236, n. 6-8, p. 18-pg., 2021-10-27.

Resumo

A systematic structural study on the intercalation of the radical cation 2-(4-N-methylpyridinium)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl-3-N-oxide (p-MPYNN) into a synthetic fluoromica clay named Somasif(R) ME 100, Na2xMg3.0-xSi4O10(FyOH1-y)(2) (x = 0.33, y = 0.98), has been carried out. The guest-host interactions in these intercalation compounds have been characterized by X-ray powder diffraction and solid-state NMR of the constituent nuclei (Na-23, F-19, Al-27 and Si-29) of the Somasif lattice. The intercalation process can be quantitatively monitored using Na-23 MAS-NMR. As a function of radical ion loading, different kinds of stacking arrangements can be realized, which modify the intermolecular interactions between the electron spins of the guest species, as probed by electron spin resonance (EPR) and H-1 solid state nuclear magnetic resonance (NMR). The results are discussed in relation to previous literature data on similar systems. (AU)

• Processo FAPESP: 13/23490-3 - Técnicas de ressonância magnética empregadas no estudo da correlação estrutura/propriedades em vidros e vitrocerâmicas fotônicos
• Beneficiário: Marcos de Oliveira Junior
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado