Colored optical waveguides in self-assembled thiadiazole-based materials. (April 2018)

• Record Type: Journal Article
• Authors: Martín, Raúl; Prieto, Pilar; Carrillo, José R.; Torres, Iván; Strassert, Cristian A.; Soloviova, Kateryna; Rodríguez, Ana M.; Sánchez, Luis; Díaz-Ortiz, Ángel
• Is Part Of: Dyes and pigments. Volume 151(2018)
• Page Start: 327
• Page End: 334
• Publication Date: 2018-04
• Subjects: 1, 3, 4-Thiadiazole -- benzo[c][1, 2, 5]thiadiazole -- Self-assembly -- Optical waveguide; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2018.01.001
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: The photophysical features and waveguiding behavior of two series of thiadiazoles are reported. The different substitution patterns on the thiadiazole moiety (1, 3, 4- or 1, 2, 5-system) result in bent and linear molecular geometries in which the peripheral substitution plays a prominent role in their aggregation ability. Thus, only the presence of the 3, 4, 5-trimethoxyaryl moiety favors the aggregation of thiadiazoles5 and8 into crystalline supramolecular structures. The linear geometry and the aggregation of the methoxy-substituted benzo[ c ][1, 2, 5]thiadiazole8 have been corroborated by X-diffraction analysis. The photoluminescence (PL) quantum yields of the aggregated heterocycles5 and8 decreases with respect to the PL quantum yield in solution due to an aggregation-caused quenching (ACQ) effect. Despite this ACQ, the crystalline aggregates of both bent and linear thiadiazoles5 and8 exhibit waveguiding behavior with different emission colors (red, green and blue). Graphical abstract: 1, 3, 4-Thiadiazole and benzo[ c ][1, 2, 5]thiadiazole based materials are enable to assemble in crystalline aggregates which exhibit waveguiding behavior with different emission colors (red, green and blue).