The correlation between structure and properties as investigated by multinuclear solid state NMR in disordered materials

• Grant number: 18/24735-3
• Support type: Regular Research Grants
• Duration: March 01, 2019 - August 31, 2021
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
• Principal researcher: Silvia Helena Santagneli
• Grantee: Silvia Helena Santagneli
• Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Assoc. researchers: Hellmut Eckert

Abstract

The main objective of this proposal is to perform a deeply structural study in amorphous materials by Solid State Nuclear Magnetic Resonance (NMR) technique. The activities proposed involve the development and structural characterization of the following materials: i) Study of glasses and glass ceramic materials based on phosphate and fluorophosphate with potential application in photonics. These glasses have low phonon energy, and consequently better optical properties and low non-radiative relaxation for the samples doped with rare earth ions (RE). Interest on these glass systems is based on the understanding of their optical properties. In fact, the combination of NMR and optical spectroscopies defines a comprehensive integrated spectroscopic strategy to obtain important quantitative information in the short- and medium-range order of the glass network. ii) The second research field consists of the structural study in hybrid materials prepared from the sol gel process for the production of objects prepared by additive by manufacture (MA), known as 3D printing, and in collaboration with others partners included in this proposal. The focus of these nanostructured materials is on the study of surface properties as well as the molecular structure, dynamics and reactions of the adsorbed species. Understanding the nature of the processes responsible for the formation of organic and inorganic compounds can be monitored by NMR spectroscopy. The hydrolysis and condensation reactions can be monitored, allowing the understanding the dynamics reaction process involved, as well as the processes that involve the elimination of the organic phase. Liquid and solid state NMR will allow the study of the nature of these interactions. (AU)

Scientific publications

(5)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DE PAIVA, JULIANA MORENO; DE OLIVEIRA BARUD, HELIDA GOMES; FRANCO, DOUGLAS FAZA; MENEGUIN, ANDREIA BAGLIOTTI; RIBEIRO, ANTONIO JOSE; BARUD, HERNANE S.; NALIN, MARCELO. The impact of P/Ca molar ratio on physicochemical and release properties of calcium polyphosphate coacervates. Materials Chemistry and Physics, v. 264, MAY 1 2021. Web of Science Citations: 0.

GALLEANI, GUSTAVO; BRADTMUELLER, HENRIK; FARES, HSSEN; SANTAGNELI, SILVIA HELENA; NALIN, MARCELO; ECKERT, HELLMUT. BiF3 Incorporation in Na/Ba Mixed Network Modifier Fluoride-Phosphate Glasses: Structural Studies by Solid-State NMR and Raman Spectroscopies. Journal of Physical Chemistry C, v. 124, n. 46, p. 25578-25587, NOV 19 2020. Web of Science Citations: 0.

TAYAMA, GABRIEL TOSHIAKI; SANTAGNELI, SILVIA HELENA; ECKERT, HELLMUT; PAWSEY, SHANE; MESSADDEQ, YOUNES. Preparation and Structural Characterization of New Photopolymerizable Transparent Aluminum-Phosphate Hybrid Materials as Resins for 3D Printing. Journal of Physical Chemistry C, v. 124, n. 46, p. 25621-25631, NOV 19 2020. Web of Science Citations: 0.

FRANCO, DOUGLAS F.; FERNANDES, ROGER GOMES; SANTAGNELI, SILVIA HELENA; DE OLIVEIRA JR, MARCOS; ECKERT, HELLMUT; NALIN, MARCELO. Structural Study of the Germanium-Aluminum-Borate Glasses by Solid State NMR and Raman Spectroscopies. Journal of Physical Chemistry C, v. 124, n. 44, SI, p. 24460-24469, NOV 5 2020. Web of Science Citations: 0.

GALLEANI, GUSTAVO; DOERENKAMP, CARSTEN; SANTAGNELI, SILVIA; MAGON, CLAUDIO JOSE; DE CAMARGO, ANDREA S. S.; ECKERT, HELLMUT. Compositional Optimization of Emission Properties for Rare-Earth Doped Fluoride Phosphate Glasses: Structural Investigations via NMR, EPR, and Optical Spectroscopies. Journal of Physical Chemistry C, v. 123, n. 51, p. 31219-31231, DEC 26 2019. Web of Science Citations: 0.