Halogen-doped phosphorescent carbon dots for grayscale patterning DOI Creative Commons
Yanfeng Liu,

Mahmoud Al-Salihi,

Yong Guo

et al.

Light Science & Applications, Journal Year: 2022, Volume and Issue: 11(1)

Published: May 30, 2022

Abstract Flexible organic materials that exhibit dynamic ultralong room temperature phosphorescence (DURTP) via photoactivation have attracted increasing research interest for their fascinating functions of reversibly writing-reading-erasing graphic information in the form a long afterglow. However, due to existence nonnegligible activation threshold initial exposure dose, display mode these has thus far been limited binary patterns. By resorting halogen element doping carbon dots (CDs) enhance intersystem crossing and reduce threshold, we were able produce, first time, transparent, flexible, fully programmable DURTP composite film with reliable grayscale capacity. Examples promising applications UV photography highly confidential steganography constructed, partially demonstrating broad future this material as platform high optical density.

Language: Английский

Nonconventional luminophores: characteristics, advancements and perspectives DOI

Saixing Tang,

Tianjia Yang, Zihao Zhao

et al.

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(22), P. 12616 - 12655

Published: Jan. 1, 2021

Mechanisms, recent advancements and perspectives concerning nonconventional luminophores free of classic conjugates but with intrinsic photoluminescence are discussed.

Language: Английский

Citations

322
Stimulus-Responsive Room Temperature Phosphorescence Materials: Internal Mechanism, Design Strategy, and Potential Application DOI Open Access
Jie Yang, Manman Fang, Zhen Li

et al.

Accounts of Materials Research, Journal Year: 2021, Volume and Issue: 2(8), P. 644 - 654

Published: July 26, 2021

ConspectusRoom temperature phosphorescence (RTP) materials, which could respond to external stimuli, such as force, heat, light, electric filed, etc., have drawn increasing attention for their broad application prospects, especially in the fields of anticounterfeiting, sensors, data storage, and so on. In comparison with traditional fluorescence ones, RTP materials show much longer emission lifetimes, can be even caught by naked eye. Thus, change lifetime under an stimulus also a potential monitoring parameter, addition color intensity. other words, number visual parameters increase from two three would greatly facilitate practical applications. Until now, been typically limited metal-containing inorganic particularly rare-earth phosphors. Their emissions are governed slow liberation trapped charge carriers isolated traps impurities, defects, or ions through thermal stimulation low luminescence efficiency. However, these suffer some intrinsic disadvantages, including high cost, toxicity, instability aqueous environments. order solve problems, purely organic should good choice. kinds really scarce ones response characteristic.To develop effect, we scientists tried lot. Luckily, progresses made. this Account, present our recent progress on stimulus-responsive room mainly focusing internal mechanism First, fundamental knowledge is described illustrate importance main principles effect. Then, typical based different mechanisms discussed. Mainly, were introduced, namely, single-component multicomponent ones. Correspondingly, dynamic property occurred distinct mechanisms. For changes molecular structure, packing, conformation, played significant role corresponding As changed oxygen concentration matrix intermolecular distance between components found more during process. Accordingly, applications explored processes. With classification mechanisms, design strategy well proposed, thus guiding further development research field.

Language: Английский

Citations

210
Achieving Tunable Organic Afterglow and UV‐Irradiation‐Responsive Ultralong Room‐Temperature Phosphorescence from Pyridine‐Substituted Triphenylamine Derivatives DOI

Shengde Xiong,

Yu Xiong, Deliang Wang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(28)

Published: April 7, 2023

Amorphous polymers with ultralong room-temperature phosphorescence (RTP) are highly promising for various applications. Particularly, polymer-based RTP materials multiple functions such as color-tunability or stimulus-response desirable multilevel anti-counterfeiting but rarely reported. Herein, a facile strategy is presented to achieve series of lifetime, multicolor afterglow, and reversible response UV irradiation by simply embedding pyridine-substituted triphenylamine derivatives into the polymer matrix poly(vinyl alcohol) (PVA) poly(methyl methacrylate) (PMMA), respectively. Notably, pyridine group capabilities promoting intersystem crossing forming hydrogen-bonding interactions essential triggering from doping PVA system, among which film TPA-2Py@PVA exhibits excellent property an lifetime 798.4 ms high quantum yield 15.2%. By further co-doping commercially available fluorescent dye, afterglow obtained via energy transfer. Meanwhile, doped PMMA system photoactivated properties under continuous irradiation. Finally, potential applications these systems in multidimensional demonstrated.

Language: Английский

Citations

137
Poly(arylene piperidine) Quaternary Ammonium Salts Promoting Stable Long‐Lived Room‐Temperature Phosphorescence in Aqueous Environment DOI
Chang Wang, Lunjun Qu, Xiaohong Chen

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(34)

Published: June 22, 2022

Room-temperature phosphorescence (RTP) materials have garnered considerable research attention owing to their excellent luminescence properties and potential application prospects in anti-counterfeiting, information storage, optoelectronics. However, several RTP systems are extremely sensitive humidity, consequently, the realization of long-lived water remains a formidable challenge. Herein, feasible effective strategy is presented achieve polymeric systems, even an aqueous environment, through doping synthesized phosphor PBHDB into poly(methyl methacrylate) (PMMA) matrix. Compared precursor polymer PBN organic molecule HDBP, more rigid microenvironment electrostatic interaction formed between PMMA matrix PBHDB, which effectively reduce nonradiative decay rate triplet excitons dramatically increase intensity. Specifically, lifetime PBHDB@PMMA film (1258.62 ms) much longer than those PBN@PMMA (674.20 HDBP@PMMA (1.06 ms). Most importantly, bright-green afterglow can be observed after soaking for month. The resistance reversible response endow these with promising dynamic encryption water.

Language: Английский

Citations

113
Dynamic organic room-temperature phosphorescent systems DOI
Qian Zhou, Chaolong Yang,

Yanli Zhao

et al.

Chem, Journal Year: 2023, Volume and Issue: 9(9), P. 2446 - 2480

Published: June 20, 2023

Language: Английский

Citations

78
Recent advances in the development of phenothiazine and its fluorescent derivatives for optoelectronic applications DOI
Faizal Khan, Rajneesh Misra

Journal of Materials Chemistry C, Journal Year: 2023, Volume and Issue: 11(8), P. 2786 - 2825

Published: Jan. 1, 2023

Phenothiazine is one of the most extensively investigated aromatic compounds owing to its unique optical and electronic properties. This review highlighted recent advances in development phenothiazine-based fluorescent materials for applications various fields.

Language: Английский

Citations

67
Ultralong Room-Temperature Phosphorescence with Second-level Lifetime in Water Based on Cyclodextrin Supramolecular Assembly DOI
Dan Li, Zhenjiang Liu, Manman Fang

et al.

ACS Nano, Journal Year: 2023, Volume and Issue: 17(13), P. 12895 - 12902

Published: June 29, 2023

Organic solid-state materials with long-lived room-temperature phosphorescence (RTP) emission have been widely developed and applied in many fields, while works developing solution-phase were rarely reported owing to the ultrafast nonradiative relaxation quenchers from liquid medium. Herein, we report an ultralong RTP system water through assembly based on a β-cyclodextrin host p-biphenylboronic acid guest lifetime of 1.03 s under ambient conditions. It is worth noting that depends host-guest inclusion as well intermolecular hydrogen bonding interactions, which suppress avoid effectively. Furthermore, addition fluorescent dyes achieved tuning afterglow color radiative energy transfer reabsorption.

Language: Английский

Citations

60
Conjugation-Modulated Excitonic Coupling Brightens Multiple Triplet Excited States DOI Creative Commons
Tao Wang, Abhishek Kumar Gupta, Sen Wu

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(3), P. 1945 - 1954

Published: Jan. 13, 2023

The design and regulation of multiple room-temperature phosphorescence (RTP) processes are formidably challenging due to the restrictions imposed by Kasha's rule. Here, we report a general principle for materials that show RTP processes, which is informed our study four compounds where there modulation linker hybridization between donor (D) acceptor (A) groups. Theoretical modeling photophysical experiments demonstrate can be achieved in sp3 C-linked D-A arrest intramolecular electronic communication two triplet states (T1H T1L) localized on or states, one delocalized across aggregated acceptors. However, sp2 counterparts, from locally excited T1 state observed because enhanced excitonic coupling molecular subunits. Single-crystal reduced density gradient analyses reveal influence packing coincident origin aggregate phosphorescence. These findings provide insights into higher-lying excited-state dynamics fundamental designing RTP.

Language: Английский

Citations

56
Lighting up metastasis process before formation of secondary tumor by phosphorescence imaging DOI Creative Commons
Kai Chang, Leyi Xiao,

Yuanyuan Fan

et al.

Science Advances, Journal Year: 2023, Volume and Issue: 9(20)

Published: May 17, 2023

Metastasis is the leading cause of cancer-related deaths; until now, detection tumor metastasis mainly located at period that secondary tumors have been formed, which usually results in poor prognosis. Thus, fast and precise positioning organs, where metastases are likely to occur its earliest stages, essential for improving patient outcomes. Here, we demonstrated a phosphorescence imaging method by organic nanoparticles detect early progress with microenvironmental changes, putting ahead formation tumors. In orthotopic simulated hematological models, changes could be recognized day 3, after implantation liver or intravenous injection cancer cells. It was far those other reported methods least 7 days later, providing sensitive convenient monitor stage.

Language: Английский

Citations

56
Solid‐State Photochemical Cascade Process Boosting Smart Ultralong Room‐Temperature Phosphorescence in Bismuth Halides DOI

Xing Chang,

Zhenhong Qi, Bo Zhou

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(21)

Published: March 11, 2024

Abstract Molecular ultralong room‐temperature phosphorescence (RTP), exhibiting multiple stimuli‐responsive characteristics, has garnered considerable attention due to its potential applications in light‐emitting devices, sensors, and information safety. This work proposes the utilization of photochemical cascade processes (PCCPs) molecular crystals design a stepwise smart RTP switch. By harnessing sequential dynamics photo‐burst movement (induced by [2+2] photocycloaddition) photochromism photogenerated radicals) bismuth (Bi)‐based metal‐organic halide (MOH), continuous photo‐responsive can be achieved. Furthermore, utilizing same Bi‐based MOH, diverse application demonstrations, such as multi‐mode anti‐counterfeiting encryption, easily implemented. thus not only serves proof‐of‐concept for development solid‐state PCCPs that integrate photosalient effect with light‐chemical‐mechanical energy conversion, but also lays groundwork designing new MOHs dynamically responsive RTP.

Language: Английский

Citations

51