SOLVATOCHROMISM AND IONOCHROMISM OF THE NILE BLUE DYE A THROUGH RAMAN, INFRARED AND UVVIS SPECTROSCOPIES

Author(s)

Michele Lemos de Souza ^[1] ; Paola Corio ^[2]

Affiliation

^[1] Universidade Federal Fluminense. Departamento de Química - Brasil

^[2] Universidade de São Paulo. Departamento de Química Fundamental - Brasil

• Document type: Journal article
• Source: Química Nova; v. 42, n. 9, p. 1091-1097, 2019-12-05.

Abstract

The present work presents the systematic study of Nile Blue A (NB) dye, a cationic textile dye, through electronic and vibrational spectroscopies (Raman, resonant Raman scatter and infrared absorption) in the presence of distinct anions (chloride, bromide, perchlorate and sulfate) and protic and aprotic solvents of different polarities (water, ethanol, acetone, acetonitrile, chloroform and ethyl acetate). There were vibrational changes resulting from the formation and destruction of aggregates according to the chemical environment, besides the formation of a molecular conformation with higher energy in apolar aprotic solvents. (AU)

• FAPESP's process: 08/03636-5 - Applications of metallic nanocomposites in enhanced photochemical processes: plasmon effects in photocatalysis and photoelectrochemistry
• Grantee: Michele Lemos de Souza
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 16/21070-5 - Vibrational spectroscopy with spatial resolution
• Grantee: Mauro Carlos Costa Ribeiro
• Support Opportunities: Research Projects - Thematic Grants