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High pressure Raman spectroscopy, from aromatics amines to conducting polymers.

Grant number: 14/15107-8
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): December 01, 2014
Effective date (End): October 01, 2017
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal researcher:Marcia Laudelina Arruda Temperini
Grantee:Marcelo Medre Nobrega
Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:12/13119-3 - Vibrational spectroscopy in condensed phases, AP.TEM
Associated scholarship(s):15/09763-2 - High pressure synthesis and reactivity of aniline and polyaniline-gold composites, BE.EP.PD

Abstract

This project is based on the studies performed during the internship in the European Laboratory for Non-linear Spectroscopy. During this internship the influence of the morphology on the polyaniline (PANI) behavior under high pressure, up to 15 GPa, was studied. This project aims to systematically study the behavior of aniline under high pressure and the interaction effect of PANI nanofibers with gold nanoparticles under high pressure, up to 20 - 25 GPa. The aniline stability will be studied in liquid and solid phases (phase I and II) as a function of pressure in absence and presence of electronic excitation with laser in the visible range. This behavior will be monitored by Raman and infrared spectroscopies. Under these conditions of pressure and radiation the polymerization of aniline is expected resulting in the formation of aniline oligomers, formed through several polymerizations mechanisms of aniline, and/or polyaniline, if the head-to-tail coupling is favored. The obtained material will be characterized morphologically (scanning electron microscopy (SEM)) and spectroscopically (UV-VIS-NIR, FTIR and Raman). The behavior of the hybrid material of PANI fibers and gold nanoparticles under high pressure will be also studied. The response of the material will be followed by Raman and FTIR techniques. It is expected that the presence of the gold nanoparticles changes the behavior of the PANI nanofibers, whether in quantity or nature of the cross-linking segments formed in a high pressure condition, when compared to pure PANI. It is intended to complement the study of the stability of aniline and the behavior of composites at high pressure during a research internship abroad (BEPE) that will be submitted on due date. The development of this project will have the collaboration of Prof. Roberto Bini, University of Florence.

Scientific publications (8)
(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)
FANETTI, SAMUELE; NOBREGA, MARCELO M.; DZIUBEK, KAMIL; CITRONI, MARGHERITA; SELLA, ANDREA; MCMILLAN, PAUL F.; HANFLAND, MICHAEL; BINI, ROBERTO. Structure and reactivity of 2,4,6-tricyano-1,3,5-triazine under high-pressure conditions. CrystEngComm, v. 21, n. 30, p. 4493-4500, AUG 14 2019. Web of Science Citations: 2.
DE MATOS, CAROLINE S.; NOBREGA, MARCELO M.; TEMPERINI, MARCIA L. A.; CONSTANTINO, VERA R. L. Hybrid Ni-Al layered double hydroxide: Characterization and in situ synchrotron XRD and vibrational spectroscopic studies under high-pressure. APPLIED CLAY SCIENCE, v. 174, p. 152-158, JUN 15 2019. Web of Science Citations: 0.
FARIA, LUIZ F. O.; NOBREGA, MARCELO M.; FALSINI, NAOMI; FANETTI, SAMUELE; TEMPERINI, MARCIA L. A.; BINI, ROBERTO; RIBEIRO, MAURO C. C. Structure and Reactivity of the Ionic Liquid 1-Allyl-3-methylimidazolium Iodide under High Pressure. Journal of Physical Chemistry B, v. 123, n. 8, p. 1822-1830, FEB 28 2019. Web of Science Citations: 0.
FANETTI, SAMUELE; NOBREGA, MARCELO M.; TEIXEIRA-NETO, ERICO; TEMPERINI, MARCIA L. A.; BINI, ROBERTO. Effect of Structural Anisotropy in High-Pressure Reaction of Aniline. Journal of Physical Chemistry C, v. 122, n. 51, p. 29158-29164, DEC 27 2018. Web of Science Citations: 2.
FANETTI, SAMUELE; CITRONI, MARGHERITA; DZIUBEK, KAMIL; NOBREGA, MARCELO MEDRE; BINI, ROBERTO. The role of H-bond in the high-pressure chemistry of model molecules. JOURNAL OF PHYSICS-CONDENSED MATTER, v. 30, n. 9 MAR 7 2018. Web of Science Citations: 12.
NOBREGA, MARCELO M.; TEIXEIRA-NETO, ERICO; CAIRNS, ANDREW B.; TEMPERINI, MARCIA L. A.; BINI, ROBERTO. One-dimensional diamondoid polyaniline-like nanothreads from compressed crystal aniline. CHEMICAL SCIENCE, v. 9, n. 1, p. 254-260, JAN 7 2018. Web of Science Citations: 21.
NOBREGA, MARCELO M.; TEMPERINI, MARCIA L. A.; BINI, ROBERTO. Probing the Chemical Stability of Aniline under High Pressure. Journal of Physical Chemistry C, v. 121, n. 13, p. 7495-7501, APR 6 2017. Web of Science Citations: 8.
FARIA, LUIZ F. O.; NOBREGA, MARCELO M.; TEMPERINI, MARCIA L. A.; BINI, ROBERTO; RIBEIRO, MAURO C. C. Triggering the Chemical Instability of an Ionic Liquid under High Pressure. Journal of Physical Chemistry B, v. 120, n. 34, p. 9097-9102, SEP 1 2016. Web of Science Citations: 3.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.