Abstract
In this work, perylene bisimide derivatives (PBI-1 and PBI-2) with tertiary amine groups were designed and synthesized. To control the final morphologies and properties of their aggregates, seven kinds of organic acids were used to alter the self-assembly environment. The influence of organic acids on the morphology of the aggregates was investigated. Photophysical properties of the aggregates were markedly affected by the kind and concentration of the organic acid. The thermal and gas sensitivities of the PBI-1 aggregates were studied with the use of UV–visible spectroscopy and digital imaging. The shift of the UV–visible spectra varied with time, temperature, acid type and acid concentration. Furthermore, PBI-1 aggregates showed a red-to-blue color change after addition of seven organic acids, whereas the color of the PBI-2 aggregates remained red. These changes of morphologies, photophysical properties and their thermal and gas sensitivities make these aggregates potentially useful in the fields of optoelectronics or sensors.
Highlights
In recent years, many functional nanomaterials have been synthesized through the use of self-assembly
We report on the design and synthesis of PBI-1 and PBI-2 substituted with rapid solvent diffusion method
The color of the PBI-1 aggregates changed from red to blue after addition of seven organic acids, and the color of PBI-2 aggregates remained red
Summary
Many functional nanomaterials have been synthesized through the use of self-assembly. Morphologies, photophysical properties, and thermal and gas tertiary amine groups, and self-assembled in seven organic acids (namely, p-toluenesulfonic acid, sensitivities of PBI-1 aggregates were investigated by digital imaging, polarized light microscopy oxalic acid, malonic acid, citric acid, formic acid, glutaric acid and acetic acid) through the use of (POM), field emission scanning electron microscope (SEM) imaging, UV–visible (UV–vis) the rapid solvent diffusion method. Changes of the morphologies and photophysical sensitivities of PBI-1 aggregates were investigated by digital imaging, polarized light microscopy properties of PBI-1 aggregates assembled in organic acids are discussed These results provide a (POM), field emission scanning electron microscope (SEM) imaging, UV–visible (UV–vis) spectroscopy basis for subsequent design of perylene bisimide nano-optical functional materials and their and fluorescence spectroscopy. These results provide a basis for subsequent design of perylene bisimide nano-optical functional materials and their applications in sensors
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