Study of the Photoluminescence Characteristics of 4,4′((1E,1′E)-Quinoxaline-2,3-diylbis(ethene-2,1-diyl))bis(N,N-dimethylaniline)

A comparative investigation on the photophysical properties of a quinoxaline derivative 4,4'-((1E,1'E)-quinoxaline-2,3-diylbis(ethene-2,1-diyl))bis(N,N-dimethylaniline) (QDMA2) was performed by employing many spectroscopies. Based on the pump-dump/push-probe measurement, it is found that a solvent-stabilized charge-transfer state can participate in the relaxation of excited QDMA2 with increasing solvent polarity. Meanwhile, the aggregated QDMA2 molecules were engineered into the organic light-emitting diode test, which showed a correlated color temperature value of 1875 K. With the help of a diamond anvil cell, the pressure-dependent photoluminescence of aggregated QDMA2 shows that the intermolecular interaction can affect the color and intensity of photoluminescence through adjusting the band gap and irradiative channel of the aggregated molecules. These results are important for understanding the structure-property relationships and the rational design of functional materials for optoelectronic applications.

Automated summary

A comparative investigation on the photophysical properties of a quinoxaline derivative QDMA2 was conducted using various spectroscopies. It was found that a solvent-stabilized charge-transfer state plays a role in the relaxation process of excited QDMA2, and the aggregated QDMA2 molecules exhibit a correlated color temperature value in organic light-emitting diode testing. Pressure-dependent photoluminescence of aggregated QDMA2 suggests that intermolecular interactions can impact the color and intensity of photoluminescence by adjusting the band gap and irradiative channel of the molecules.