An Acid‐Responsive Single Trichromatic Luminescent Dye That Provides Pure White‐Light Emission
نویسندگان
چکیده
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 (1 a) specifically provides WL emission upon mixing with trifluoroacetic acid (TFA) in a CH2Cl2 solution. The emission originates from the trichromatic luminescent behavior of 1 a upon protonation of the imino groups. The blue-light-emitting 1 a exhibits dramatic color changes in fluorescence to orange and green upon mono- and diprotonation, respectively, providing a wide emission band in the range of λ=400-800 nm 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.
منابع مشابه
Acid‐Responsive Absorption and Emission of 5‐N‐Arylaminothiazoles: Emission of White Light from a Single Fluorescent Dye and a Lewis Acid
Solutions of 5-N-arylaminothiazoles containing pyridyl groups exhibited clear halochromism and halofluorism upon addition of Brønsted and Lewis acids. The addition of triflic acid to solutions of 5-N-arylaminothiazoles in Et2O induced bathochromic shifts of the absorption and emission bands. DFT calculations suggested that the spectral changes arise from the protonation of the pyridyl group of ...
متن کاملTunable colors and white-light emission based on a microporous luminescent Zn(II)-MOF.
Metal-organic frameworks (MOFs) are a rapidly growing class of hybrid materials with many multifunctional properties. The permanent porosity plays a central role in the functional properties. In particular, the luminescent MOFs with a permanent porosity have wide applications in guest species recognition and adsorption. In this contribution, we aim to develop tunable colors and white-light lumi...
متن کاملLuminescent ion pairs with tunable emission colors for light-emitting devices and electrochromic switches.
Most recently, stimuli-responsive luminescent materials have attracted increasing interest because they can exhibit tunable emissive properties which are sensitive to external physical stimuli, such as light, temperature, force, and electric field. Among these stimuli, electric field is an important external stimulus. However, examples of electrochromic luminescent materials that exhibit emissi...
متن کاملCover Picture: Acid‐Responsive Absorption and Emission of 5‐N‐Arylaminothiazoles: Emission of White Light from a Single Fluorescent Dye and a Lewis Acid (ChemistryOpen 5/2016)
The Front Cover picture shows structures of the key compounds and the change in the fluorescence. Although electron-donating and -accepting groups of monocyclic 5-N,N-diarylaminothiazoles are not in the same plane but highly deviated, they show relatively strong fluorescence from blue to orange. In particular, the addition of Brønsted and Lewis acids to 5-N,N-diaryl-2-(4-pyridyl)thiazoles shift...
متن کاملTuning of multiple luminescence outputs and white-light emission from a single gelator molecule through an ESIPT coupled AIEE process.
A unique example of an ESIPT coupled AIEE process, associated with a single molecule (1), is utilized for generating multiple luminescent colors (blue-green-white-yellow). The J-aggregated state of 1 forms a luminescent gel in THF and this luminescent property is retained even in the solid state.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره 1 شماره
صفحات -
تاریخ انتشار 2017