Red-light excited efficient metal-free near-infrared room-temperature phosphorescent films

Abstract

A set of red-light-excited, metal-free room-temperature phosphorescence (RTP) systems were constructed by brominated phenolsulfonephthaleine derivatives. The best metal-free RTP system has the reddest near-infrared (NIR) RTP emission (λp = 819 nm) with the highest phosphorescence quantum yield (ΦRTP = 3.0%) so far as is known. The RTP emission can be switched ON-OFF by adding acid and alkali alternatively. A logic operation with half-subtractor function and dual-channel response (visible light emission/NIR RTP emission) was also constructed based on these properties mentioned above.

A Simple, Easy Preparation and Tunable Strategy for Preparing Organic Room-Temperature Phosphorescence

“…Recently, our group has achieved a breakthrough by extending the conventional solid host to the fluid host. 16 The fluid host was constructed from β-CD and malic acid (MM) or citric acid (CM) in a molar ratio of 1:15. Three commonly used phosphors (CTO, 1-bromonaphthalene (BNa), and N-propyl-4-bromo-1,8-naphthalimide (PrBNp)) were selected as guests (Figure 3).…”

Highly Efficient TADF‐Type Organic Afterglow of Long Emission Wavelengths

“…[18,24] Among these afterglow materials with long λ em , some of them that possess low-energy absorption bands can be excited by visible lights such as commercial available and inexpensive 405, 445, 488, 532, and even 633 nm lasers to exhibit organic afterglow at room temperature. [25][26][27] The above advantages would largely widen the scope of afterglow material applications and significantly reduce the cost of these applications.…”

Halide-containing organic persistent luminescent materials for environmental sensing applications

“…The sulfonyl group is also considered to be an effective group to induce OPL emission. [79][80][81][82][83] Li and Pu et al reported the OPL properties and the imaging application of several 10-phenyl-10H-phenothiazine-5,5-dioxidebased derivatives 43-46. 51 The lone pair electrons of O and N atoms in 43-46 promote the ISC process according to the El-Sayed rules.…”