Hydrogen Bonding in Ionic Liquids - Vibrational Spectroscopy and Physical Properties

• Grant number: 20/09250-3
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date until: December 01, 2020
• End date until: November 30, 2025
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Rômulo Augusto Ando
• Grantee: Beatriz Rocha de Moraes
• Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 16/21070-5 - Vibrational spectroscopy with spatial resolution, AP.TEM
• Associated scholarship(s): 23/06957-7 - Solubilization of biopolymers by ionic liquids and their mixtures: spectroscopic and thermodynamic approach, BE.EP.DR

Abstract

Ionic liquids (IL) are characterized by low melting points even being constituted exclusively by ions. Both the IL structure and their properties are governed by a subtle balance between Coulomb, London dispersion, and hydrogen bonding forces. The latter has a crucial role since it is responsible for disturbing the charge ordering induced by Coulombic interactions, fluidizing the liquid. Therefore, the IL properties can be modulated by the tuning of the ratio between Coulomb interactions and hydrogen bonding between ions. In the present project, we aim to perform a systematic investigation of such interactions, mainly the hydrogen bonding, in ionic liquids, with three distinct approaches: (i) mixtures between ionic liquids, (ii) mixtures between ionic liquids and common solvents, and (iii) insertion of probe molecules sensitive to hydrogen bonding. These systems will be investigated by different spectroscopic techniques, particularly vibrational spectroscopy (Raman and infrared) as a function of molar fraction, pressure, and temperature. The correlation between physical properties as viscosity, density and melting point of the different systems with the microscopic properties obtained by spectroscopic techniques, will contribute to a better understanding of how the hydrogen bonds rule some of the main IL characteristics, which is fundamental for the application of such solvents in several processes.

Scientific publications

(4)

(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)

RANI-BORGES, BARBARA; POMPEO, MARCELO; QUEIROZ, LUCAS GONCALVES. Are Daphnia similis Playing a Significant Role in Microplastic Biofragmentation?. WATER AIR AND SOIL POLLUTION, v. 234, n. 6, p. 11-pg., 2023-06-01. (19/10845-4, 20/09250-3)

RANI-BORGES, BARBARA; QUEIROZ, LUCAS GONCALVES; PRADD, CAIO CESAR ACHILES; DE MELO, EDUARDO CARMINE; DE MORAES, BEATRIZ ROCHA; ANDO, ROMULO AUGUSTO; DE PAIVA, TERESA CRISTINA BRAZIL; POMPEO, MARCELO. Exposure of the amphipod Hyalella azteca to microplastics. A study on subtoxic responses and particle biofragmentation. AQUATIC TOXICOLOGY, v. 258, p. 9-pg., 2023-03-31. (19/10845-4, 20/09250-3)

RANI-BORGES, BARBARA; QUEIROZ, LUCAS GONCALVES; FERREIRA, KAREN DE SOUZA; MARTINS, THAIS FABIANE GOMES; VICENTE, EDUARDO; ANDO, ROMULO AUGUSTO; POMPEO, MARCELO. Effects of ABS microplastics on microalgae Chlorella vulgaris and Raphidocelis subcapitata. INTERNATIONAL JOURNAL OF LIMNOLOGY, v. 59, p. 8-pg., 2023-06-28. (19/10845-4, 20/09250-3)

GUIMARAES, GABRIEL DOS ANJOS; DE MORAES, BEATRIZ ROCHA; ANDO, ROMULO AUGUSTO; SANT'ANNA, BRUNO SAMPAIO; PEROTTI, GUSTAVO FRIGI; HATTORI, GUSTAVO YOMAR. Microplastic contamination in the freshwater shrimp Macrobrachium amazonicum in Itacoatiara, Amazonas, Brazil. ENVIRONMENTAL MONITORING AND ASSESSMENT, v. 195, n. 3, p. 17-pg., 2023-03-01. (16/21070-5, 20/09250-3)