Facile, Quick, and Gram‐Scale Synthesis of Ultralong‐Lifetime Room‐Temperature‐Phosphorescent Carbon Dots by Microwave Irradiation
Citations Over TimeTop 1% of 2018 papers
Abstract
Long-lifetime room-temperature phosphorescence (RTP) materials are important for many applications, but they are highly challenging materials owing to the spin-forbidden nature of triplet exciton transitions. Herein, a facile, quick and gram-scale method for the preparation of ultralong RTP (URTP) carbon dots (CDs) was developed via microwave-assisted heating of ethanolamine and phosphoric acid aqueous solution. The CDs exhibit the longest RTP lifetime, 1.46 s (more than 10 s to naked eye) for CDs-based materials to date. The doping of N and P elements is critical for the URTP which is considered to be favored by a n→π* transition facilitating intersystem crossing (ISC) for effectively populating triplet excitons. In addition, possibilities of formation of hydrogen bonds in the interior of the CDs may also play a significant role in producing RTP. Potential applications of the URTP CDs in the fields of anti-counterfeiting and information protection are proposed and demonstrated.
Related Papers
- → Synergistic Generation and Accumulation of Triplet Excitons for Efficient Ultralong Organic Phosphorescence(2022)66 cited
- → Intersystem crossing, phosphorescence, and spin-orbit coupling. Two contrasting Cu(I)-TADF dimers investigated by milli- to micro-second phosphorescence, femto-second fluorescence, and theoretical calculations(2022)52 cited
- → Emission spectra and phosphorescence lifetime of benzene solutions at 77°K, as a function of concentration and excitation wavelength(1969)21 cited
- → Spectroscopic studies on napththalene in the vapor phase. III. Phosphorescence and intersystem crossing yields of single vibronic levels(1975)48 cited
- → Luminescence of 5-Phenyltetrazole and its Derivatives. Part II. Phosphorescence(1984)1 cited