An Acid-Responsive Single Trichromatic Luminescent Dye That Provides Pure White-Light Emission

作者：Imamura, Keigo; Ueno, Yoshifumi; Akimoto, Seiji; Eda, Kazuo; Du, Yanqing; Eerdun, Chaolu; Wang, Meiling; Nishinaka, Kumiko; Tsuda, Akihiko^*

来源：ChemPhotoChem, 2017, 1(10): 427-431.

DOI：10.1002/cptc.201700108

• charge transfer
• chromophores
• luminescence
• protonation
• white-light emission

A novel acid-responsive single trichromatic luminescent dye capable of emitting pure white light (WL) is reported. A newly designed p-phenylene-bridged bipyrrole bearing N-alkylimino groups (1a) specifically provides WL emission upon mixing with trifluoroacetic acid (TFA) in a CH2Cl2 solution. The emission originates from the trichromatic luminescent behavior of 1a upon protonation of the imino groups. The blue-light-emitting 1a exhibits dramatic color changes in fluorescence to orange and green upon mono- and diprotonation, respectively, providing a wide emission band in the range of lambda = 400-800nm that provide WL when the compound is in a dynamic equilibrium between the three states. The sample also exhibits low self-absorption of the emitted light and a high fluorescence quantum yield upon excitation with UV light.

• 出版日期2017-10
• 单位内蒙古医科大学