Article
Chemistry, Physical
Cho Long Kim, Jae-Min Kim, HoJin Jang, Dong Ryun Lee, Jun Yeob Lee
Summary: In this study, a design methodology was developed to improve the PLQY and EQE of OLEDs by utilizing purely organic phosphorescent emitters. By incorporating a phenoselenazine core and an expanded chromophore, the designed emitter achieved high PLQY and EQE values in POPLEDs.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Applied
Wenbo Yuan, Die Hu, Mengyuan Zhu, Wei Shi, Changsheng Shi, Ning Sun, Youtian Tao
Summary: Simple peripheral tert-butyl or methoxy substitutions at the 3,6-position of carbazole can rationally tune the emission colors and energy levels of D-A type TADF emitters, resulting in enhanced performance in OLED devices.
Article
Chemistry, Inorganic & Nuclear
Hui Liu, Kun Zhang, Peng-Fu Gao, Jia-Hua Luo, Yu-Ying Jiang, Meng-Shu Zhou, Ting Li, Xue-Li Zhu, Hong-Ru Fu
Summary: Two Cd-based supramolecular coordination polymers with multiple luminescence emissions, including fluorescence and time- and temperature-dependent ultralong phosphorescence, have been successfully synthesized. One of the compounds exhibits a long-lived afterglow under ambient conditions, while the other shows nearly pure white-light emission. This is the first example of a luminescent coordination polymer with single-phase white-light emission and color-evolution RTP.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Applied
Rodrigo Plaza-Pedroche, Dimitris Georgiou, Mihalis Fakis, Arnaud Fihey, Claudine Katan, Francoise Robin-le Guen, Sylvain Achelle, Julian Rodriguez-Lopez
Summary: White-light emission can be achieved by combining neutral and protonated forms of push-pull 4-substituted and 4,7-disubstituted quinazolines in the appropriate ratio. These compounds, prepared by straightforward Suzuki-Miyaura cross-coupling reactions, demonstrate remarkable emission solvatochromism and the ability to exhibit multicolor photoluminescence, including white light, through controlled protonation of the electron-deficient quinazoline ring.
Article
Chemistry, Multidisciplinary
Mengke Li, Wentao Xie, Xinyi Cai, Xiaomei Peng, Kunkun Liu, Qing Gu, Jiadong Zhou, Weidong Qiu, Zijian Chen, Yiyang Gan, Shi-Jian Su
Summary: By introducing sulfur atoms into isomeric pentaphene and pentacene framework, we have designed a series of polycyclic luminophores with efficient TADF and RTP characteristics, which can expand the application field of organic light-emitting diodes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Haodong Sun, Xiaoyu Wei, Yunfei He, Yuxin Xiao, Yazhang Wu, Zongliang Xie, Tao Yu
Summary: In this study, two phosphorescent emitters (CzPN and CzBN) were synthesized and doped into PMMA and PVA matrices. It was found that all four polymer films exhibited ultralong afterglow. Furthermore, CzBN and CzPN showed intense afterglow in the PVA matrix without UV pre-excitation, lasting up to 10 s and 6 s, respectively. This research provides guidance for tuning the photo-active process of phosphorescent materials and paves the way for the future development of more functionally diverse polymer-based afterglow materials.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Review
Chemistry, Multidisciplinary
Xiaoyong Jia, Liangliang Zhu
Summary: Photodriven self-assembly is a crucial strategy to regulate the molecular orderliness and structure. While traditional photochemical self-assembly has disadvantages, physical processes based on photoexcitation can fully utilize photons to avoid drawbacks. These processes drive molecular movement and aggregation, promoting the assembly of materials. The exploration of photoexcitation-induced assembly can lead to the development of unprecedented optoelectronic materials.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Yaxun Wu, Fan Ni, Zhanxiang Chen, Wei Yang, Yepeng Xiang, Shaolong Gong, Xiaosong Cao, Chuluo Yang
Summary: In this study, two donor-acceptor-type TADF emitters with highly twisted conformation are synthesized. Through various experiments and analysis, it is discovered that X-aggregation supports aggregation-induced emission behavior, while H-aggregation leads to aggregation-caused quenching.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Cihan Demir, Ayhan Ungordu
Summary: The optoelectronic and electronic properties of coronene and its derivatives were predicted using computational chemistry programs. The results showed that certain compounds can be used as electron or hole transfer materials, blocking materials, and injection materials. In addition, specific structures were identified as suitable candidates for near infrared organic emitting diodes.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Aurica Farcas, Madalin Damoc, Mihai Asandulesa, Pierre-Henri Aubert, Radu Ionut Tigoianu, Elena Laura Ursu
Summary: In this study, poly(3,4-ethylenedioxythiophene) (PEDOT) was made water-soluble through encapsulation of 3,4-ethylenedioxythiophene units by cucurbit[7]uril (CB7). The resulting polymers, PEDOT center dot CB7 PS and PEDOT center dot CB7 PR, showed stable dispersions in water and exhibited fluorescence and phosphorescence in acetonitrile. The introduction of pyrene end-capping moiety increased the conductivity and prolonged the emission lifetimes.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Andrew T. Turley, Promeet K. Saha, Andrew Danos, Aisha N. Bismillah, Andrew P. Monkman, Dmitry S. Yufit, Basile F. E. Curchod, Marc K. Etherington, Paul R. McGonigal
Summary: This study investigates the relationship between solid-state luminescence and photocyclization of oligoaryl alkene chromophores by modulating the conjugation length. It is found that the emission of heptaaryl cycloheptatriene is turned off upon breaking the conjugation, but extended polycyclic frameworks can be formed. This method can be used to manipulate emission properties and selectively cyclize aromatic compounds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Wenhao Shao, Jie Hao, Hanjie Jiang, Paul M. Zimmerman, Jinsang Kim
Summary: Metal-free organic triplet emitters, with tunable emission and responsive to environmental stimuli, have great potential in solid-state lighting, sensors, and anti-counterfeiting systems. A novel excited-state intramolecular proton transfer system is proposed, showing simultaneous activation of thermally activated delayed fluorescence and room-temperature phosphorescence from both keto and enol tautomers.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Hao Liu, Naoki Ando, Shigehiro Yamaguchi, Pance Naumov, Hongyu Zhang
Summary: This study proposed the concept of excited-state conformation capture for the construction of triplet-involved materials, which provided clear evidence for the emission mechanisms of TADF and RTP. It was found that TADF may originate from aggregate effect while RTP may derive from monomers. Additionally, heavy-atom free RTP and ultra RTP were achieved by eliminating aggregate effect.
CHINESE CHEMICAL LETTERS
(2021)
Article
Multidisciplinary Sciences
Usman Ali, Guangchao Han, Yuanping Yi
Summary: The impact of connection modes between donor and acceptor on the luminescence properties of organic emitters based on TPA and PAQ is revealed. Single bond connection leads to thermally activated delayed fluorescence, while a benzene ring connection enhances room temperature phosphorescence. Furthermore, changing the connection position can facilitate both thermally activated delayed fluorescence and room temperature phosphorescence.
ADVANCED THEORY AND SIMULATIONS
(2023)
Article
Chemistry, Multidisciplinary
Tao Wang, Abhishek Kumar Gupta, Sen Wu, Alexandra M. Z. Slawin, Eli Zysman-Colman
Summary: We discovered a general design principle for materials that exhibit multiple room-temperature phosphorescence (RTP) processes. By modulating the hybridization between donor and acceptor groups, we achieved multiple RTP processes in sp3 C-linked donor-acceptor compounds. However, in sp2 C-linked counterparts, only one locally excited triplet state phosphorescence was observed due to enhanced excitonic coupling. Our findings provide insights into the dynamics of higher-lying triplet excited states and offer a fundamental design principle for compounds with multiple RTP.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Engineering, Environmental
Xing Wu, Jiajie Zeng, Xiaoluo Peng, Huijun Liu, Ben Zhong Tang, Zujin Zhao
Summary: In this study, two sky-blue luminescent materials, mCP-BP-DMAC and DCB-BP-DMAC, were synthesized and characterized. They showed excellent thermal and electrochemical stabilities, strong aggregation-induced delayed fluorescence, and high efficiency in OLEDs. These materials have great potential for applications in display and lighting devices.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Yanhong Duo, Guanghong Luo, Wentao Zhang, Renzhi Wang, Gary Guishan Xiao, Zihuang Li, Xianming Li, Meili Chen, Juyoung Yoon, Ben Zhong Tang
Summary: Noncancerous diseases are a significant cause of mortality worldwide and pose many unanswered questions and challenges in clinical research. The evolution of bio-nanomedicine, particularly aggregation-induced emission luminogens (AIEgens), has led to advancements in biosensing, diagnosis, bioimaging, and therapeutics for these diseases. AIEgens exhibit strong emission after aggregation, overcoming the quenching effect seen in traditional methods, and have unique properties that make them an excellent multimodal theranostic platform. This review summarizes the progress and potential applications of AIEgen-based nanoplatforms in detecting, diagnosing, and treating noncancerous diseases, hoping to stimulate further interest in this field.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Junyao Xie, Niu Niu, Xinyao Fu, Xiang Su, Dong Wang, Anjun Qin, Ting Han, Ben Zhong Tang
Summary: The development of facile polymerizations is important for the synthesis of functional heterocyclic polymers. In this study, a catalyst-free multicomponent polymerization method was used to synthesize functional polyoxadiazoles (PODs) with well-defined and diversified topological structures. The obtained PODs possess good solubility, high thermal and morphological stability, and excellent film-forming ability. The introduction of aggregation-induced emission (AIE) moieties enables these polymers to be used as promising lysosome-specific fluorescent probes in biological imaging.
Article
Chemistry, Multidisciplinary
Jiabao Zhuang, Bing Wang, Huan Chen, Keyi Zhang, Na Zhao, Nan Li, Ben Zhong Tang
Summary: This article describes an organic near-infrared II photosensitizer (TPEQM-DMA) with potential to overcome the hypoxia obstacle in photodynamic therapy. TPEQM-DMA can produce superoxide anion and hydroxyl radical through a low-O2-dependent type-I photochemical process, leading to disruption of cellular redox homeostasis, mitochondrial dysfunction, and increased peroxidized lipids, inducing cellular apoptosis and ferroptosis. TPEQM-DMA nanoparticles were prepared to improve its pharmacological properties and showed promising NIR-II fluorescence imaging-guided photodynamic therapy effect in vivo for tumors.
Article
Chemistry, Multidisciplinary
Shengde Xiong, Yu Xiong, Deliang Wang, Yiwen Pan, Keyao Chen, Zheng Zhao, Dong Wang, Ben Zhong Tang
Summary: A facile strategy is presented to achieve polymer-based materials with ultralong room-temperature phosphorescence (RTP), multicolor afterglow, and reversible response to UV irradiation. Pyridine-substituted triphenylamine derivatives are embedded into the polymer matrix of poly(vinyl alcohol) (PVA) and poly(methyl methacrylate) (PMMA). The doped PVA system exhibits excellent RTP properties with an ultralong lifetime of 798.4 ms and a high quantum yield of 15.2%, while the doped PMMA system shows reversible photoactivated ultralong RTP properties.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jie Cui, Fei Zhang, Dingyuan Yan, Ting Han, Lei Wang, Dong Wang, Ben Zhong Tang
Summary: This study successfully developed a versatile molecule DHTDP with aggregation-induced emission, which can simultaneously exhibit second near-infrared (NIR-II) fluorescence emission and efficient photothermal conversion. By camouflaging DHTDP nanoparticles with cancer cell membrane, the resultant biomimetic nanoparticles not only have facilitated delivery efficiency and homologous targeting capability, but also provide precise imaging guidance through NIR-II fluorescence imaging, photoacoustic imaging, and photothermal imaging. This study presents a new approach to explore superior phototheranostics for practical cancer theranostics using biomimetic multimodal phototheranostics loaded by homogeneity-targeting cell membrane.
ADVANCED MATERIALS
(2023)
Review
Polymer Science
Yunfei Zuo, Ryan T. K. Kwok, Jianwei Sun, Jacky W. Y. Lam, Ben Zhong Tang
Summary: Recent advancements in aggregation-induced emission (AIE) macromolecular materials have received attention as potential antibacterial solutions, providing new approaches for treating multidrug-resistant infections and biofilms, as well as real-time monitoring and specific targeting of bacteria. This review discusses the three main categories of AIE macromolecular materials with antibacterial properties and their mechanisms and applications in antibacterial treatment, wound care, and protective equipment. It also highlights the potential for future developments and application directions of AIE-based antimicrobial materials.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Review
Multidisciplinary Sciences
Changhuo Xu, Hanchen Shen, Tzu-Ming Liu, Ryan T. K. Kwok, Jacky W. Y. Lam, Ben Zhong Tang
Summary: In the late 19th century, scientists discovered the phenomena of aggregation-caused quenching and aggregation-induced emission (AIE) while studying the photophysical differences between chromophores in solution and aggregate states. The concept of AIE has led to the innovation of luminogenic materials with high emission in the aggregate state based on the restriction of intramolecular motion. This review explores recent advances in molecular engineering techniques for highly emissive AIE dots, such as nanoscale crystallization and matrix-assisted rigidification, with the goal of improving their brightness and inspiring the rational design of functional aggregates.
Article
Chemistry, Multidisciplinary
Yulu Li, Di Zhang, Yuewen Yu, Le Zhang, Ling Li, Leilei Shi, Guangxue Feng, Ben Zhong Tang
Summary: This study presents a cascade strategy using an aggregation-induced emission (AIE) photosensitizer-albumin complex to enhance the generation of type I reactive oxygen species (ROS), particularly hydroxyl radicals (OH·), for hypoxia-tolerant photodynamic therapy (PDT). The complex contains three important moieties that cooperatively enhance free radical generation. By inserting the complex into the hydrophobic domain of bovine serum albumin nanoparticles (BSA NPs), triplet exciton generation is increased, leading to OH· generation in the electron-rich microenvironment. Experimental and theoretical results confirm the effectiveness of this cascade strategy. In vitro and in vivo experiments validate the superior antitumor PDT performance of BSA NPs compared to conventional approaches.
Article
Chemistry, Multidisciplinary
Dan Li, Zhenjiang Liu, Manman Fang, Jie Yang, Ben Zhong Tang, Zhen Li
Summary: In this study, an ultralong room-temperature phosphorescence (RTP) system in water was achieved through assembly based on a β-cyclodextrin host and p-biphenylboronic acid guest. The long-lived phosphorescence depends on the host-guest inclusion as well as intermolecular hydrogen bonding interactions, suppressing nonradiative relaxation and avoiding quenching effectively. Additionally, the addition of fluorescent dyes allows for tuning the afterglow color through radiative energy transfer of reabsorption.
Article
Chemistry, Multidisciplinary
Michelle M. S. Lee, Eric Y. Y. Yu, Dingyuan Yan, Joe H. C. Chau, Qian Wu, Jacky W. Y. Lam, Dan Ding, Ryan T. K. Kwok, Dong Wang, Ben Zhong Tang
Summary: The aggregation-induced emission photosensitizer (AIEPS) has emerged as a promising option for bacterial theranostics. With the use of cationic AIEPS, it has been possible to discriminate and eliminate bacteria effectively. This study investigates the relationship between hydrophobicity variation of cationic amphiphilic AIEPS and bacterial targeting outcomes, providing insights into the design strategies for better development in bacterial theranostics.
Article
Chemistry, Multidisciplinary
Yue Tan, Di Huang, Caiming Luo, Jiahao Tang, Ryan T. K. Kwok, Jacky W. Y. Lam, Jianwei Sun, Jinbin Liu, Ben Zhong Tang
Summary: In this study, clearable mercaptosuccinic acid (MSA) coated Au-Ag bimetallic nanoparticles (NPs) were designed to enhance reactive oxygen species (ROS) production. The strong COO-Ag coordination bonds between MSA and Ag atoms on the NPs restricted intrananoparticle motions, leading to enhanced ROS generation. The bimetallic NPs also exhibited pH-responsive self-assembly capability, further boosting ROS production and showing high tumor targeting efficiency and effective cancer cell destruction.
Article
Materials Science, Biomaterials
Yuanyuan Li, Mubin He, Zeming Liu, Clarence Chuah, Youhong Tang, Yanhong Duo, Ben Zhong Tang
Summary: In this study, a simple strategy was developed to enable molecules with near-infrared II (NIR-II) imaging and photothermal therapy (PTT)/photodynamic therapy (PDT) abilities by equipping NIR-II aggregation-induced emission luminogens (AIEgens) with the cationic trimethylammonium unit, named as TDTN+. The resulting TDTN+ species could self-assemble into nanoparticles, exhibiting a maximum emission at approximately 1052 nm, high photothermal conversion efficiency (66.7%), type I and type II ROS generation, and mitochondria-targeting ability. TDTN+ enabled bright fluorescence brain imaging and effective tumor killing. Overall, this work presents an innovative design strategy for developing multimodality phototheranostic agents.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Materials Science, Multidisciplinary
Xing Wu, Xiaoluo Peng, Letian Chen, Zujin Zhao, Ben Zhong Tang
Summary: A novel through-space conjugated molecule (2,3-PICz-XT) with dual delayed fluorescence and room-temperature phosphorescence is developed, which exhibits short phosphorescence lifetimes and high photoluminescence quantum yields. 2,3-PICz-XT functions as an efficient emitter and sensitizer in OLEDs, achieving high external quantum efficiencies and improved EL performances.
ACS MATERIALS LETTERS
(2023)
Review
Chemistry, Physical
Peiying Liu, Danxia Li, Miaomiao Kang, Yinzhen Pan, Ziyao Wen, Zhijun Zhang, Dong Wang, Ben Zhong Tang
Summary: The continuous threat of antibiotic-resistant bacterial biofilms due to the complex microenvironment has posed a challenge to public health. The exploration of high-performance antibiofilm systems fueled by the urgent demand for effective biofilm combating has drawn attention to aggregation-induced emission luminogens (AIEgens). This review summarizes the current progress of AIEgens in bacterial biofilm imaging and antibiofilm theranostics, highlighting their potential in fluorescence imaging, enzyme-responsive biofilm imaging, and eradication of preexisting biofilms.