Fluorescence Study of Dehydroabietic Acid-Based Bipolar Arylamine-Quinoxalines

Abstract

The absorption and fluorescence spectra, lifetimes and quantum yields of a series of triarylaminequinoxaline bipolar compounds, with and without the bulky dehydroabietic acid group, have been studied in toluene solution. This bulky group is introduced to improve solubility and thermal properties of these systems. It is shown that this does not affect their spectral or photophysical behavior. The compounds show relatively strong fluorescence, with the emission maximum strongly dependent upon the substituents present. Oxidation potentials have also been determined in acetonitrile solution, and again indicate that introduction of the resin acid moiety has no effect on these properties.

The tautomerism, solvatochromism and non-linear optical properties of fluorescent 3-hydroxyquinoxaline-2-carboxalidine-4-aminoantipyrine

“…Several quinoxaline derivatives as well as heterocycles that contain a quinoxaline moiety have p-extended frameworks and are much used as photoluminesent molecules [8e10] and electron-transport materials in multilayer OLEDs [11,12]. For use in LEDs, a knowledge of the photophysical characteristics of the charge-transporting materials is of fundamental importance in terms of the optimisation of device properties and is also valuable for the design of potential new blue-light emitters [13]. In recent years, numerous reports on the photophysical properties of quinoxalines have appeared [14e23].…”

Photodynamics of a PV Trimer in High‐Viscosity Solvents and in PMMA Films: A New Insight into Energy Transfer versus Conformational Relaxation in Conjugated Polymers

“…[4,5] Complexity results from photophysical processes, which in dilute solution include solvent and/or conformational relaxation [3,[6][7][8][9][10] and intrachain energy transfer, [11][12][13] while in concentrated solution or in films they may also involve interchain energy transfer, [2] excimer formation [14] and formation of H or J aggregates. [15][16][17] The correct interpretation of this information is important for detecting, understanding and resolving problems such as imbalance of electron and hole injection currents, [18][19][20][21][22][23] decreased luminescence yields, which result from aggregation quenching that is dependent on the polymer concentration, [15][16][17] and chemical stability of the films.…”

Picosecond Structural Relaxation of Abietic Acid Based Amine End Capped Para‐Phenylenevinylene Trimers in Solution

“…[7,8] We have recently shown the advantages of using dehydroabietic acid based amines in terms of their solution processibility, charge transport and film stability. [9,10] Herein, we report the synthesis and the photophysical properties of six new dehydroabietic acid based amine end-capped derivatives of two p-phenylenevinylene trimers (MBOPV3 and EHOPV3).…”