Organic solid fluorophores regulated by subtle structure modification: color-tunable and aggregation-induced...

Area of Science:

• Materials Science
• Organic Chemistry
• Photophysics

Background:

• Organic solid fluorophores are crucial for various applications, but their design is hindered by concentration quenching.
• Developing fluorophores with tunable emission and resistance to quenching remains a significant challenge.

Purpose of the Study:

• To design and synthesize novel organic solid fluorophores with tunable emission colors.
• To investigate the impact of substituents on the photophysical properties of fluorophores.
• To explore unique optical phenomena such as aggregation-induced emission and mechanochromism.

Main Methods:

• Synthesis of two series of organic solid fluorophores based on a p-bis(2,2-dicyanovinyl)benzene core.
• Introduction of non-aromatic and aromatic substituents to tune emission color.
• Characterization of photophysical properties, including emission spectra and solid-state luminescence.

Main Results:

• Successful development of organic solid fluorophores with tunable emission colors.
• Fluorophores with non-aromatic substituents showed controlled emission.
• Fluorophores with aromatic substituents exhibited aggregation-induced emission, polymorphism-dependent emission, and reversible mechanochromic luminescence.

Conclusions:

• The p-bis(2,2-dicyanovinyl)benzene core is a versatile platform for designing organic solid fluorophores.
• Substituent engineering effectively controls emission color and overcomes concentration quenching.
• Aromatic substituents unlock advanced optical functionalities, expanding potential applications.