Article
Engineering, Environmental
Liuqi Kong, Yan Zhu, Shaochen Sun, Hongye Li, Shuo Dong, Fei Li, Farong Tao, Liping Wang, Guang Li
Summary: Polymer-based room temperature phosphorescence (RTP) materials have been developed with persistent multicolor and near-infrared (NIR) emission. These materials showed tunable multicolor afterglow and persistent luminescence in the NIR region, making them suitable for applications in multiple information encryption and multicolor displays.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Zixuan Li, Qing Pei, Yonghui Zheng, Zhigang Xie, Min Zheng
Summary: This study successfully synthesized fluorescent carbon dots (CDs) with excellent biosafety, stability, dispersibility, and photodynamic activity. The CDs emitted long-lasting near-infrared (NIR) fluorescence, enabling high penetration and long-term in vivo luminescent imaging of deep tissues. Moreover, the CDs generated abundant reactive oxygen species, effectively inhibiting tumor growth. This work demonstrates the enormous potential of CDs as multifunctional nanoplatforms for biomedical applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Zhishan Zhou, Zhijian Song, Jinkun Liu, Bingfu Lei, Jianle Zhuang, Xuejie Zhang, Yingliang Liu, Chaofan Hu
Summary: Energy transfer is used to enhance room temperature phosphorescence in carbon dots by embedding pure phosphorescent CDs into afterglow matrixes. This strategy significantly prolongs emission intensity, phosphorescence lifetime, and emission time of CDs, providing a new design route for CD-based materials with long phosphorescence emission and high emission intensity.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Ru Liang, Lijun Huo, Ao Yu, Jinjing Wang, Chunman Jia, Jianwei Li
Summary: Researchers reported a microwave approach to prepare room temperature phosphorescent carbon dots (CDs) in a short time. The formation of carbon and boron bonds through microwave irradiation resulted in long afterglow properties. The materials showed significant phosphorescence under UV light and had a long phosphorescence lifetime. The glass state of the material contributed to the stabilization of its characteristics.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Keyao Chen, Yu Xiong, Deliang Wang, Yiwen Pan, Zheng Zhao, Dong Wang, Ben Zhong Tang
Summary: In this study, polymer-based room-temperature phosphorescence (RTP) materials were developed with ultralong lifetime, wide color-tunability, and persistent near-infrared (NIR) luminescence through non-traditional phosphorescence resonance energy transfer (PRET) and two-step sequential resonance energy transfer systems. These water-soluble polymeric afterglow materials show great potential applications in advanced anti-counterfeiting and information security technologies.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
Siyu Sun, Liangwei Ma, Jie Wang, Xiang Ma, He Tian
Summary: A set of metal-free room-temperature phosphorescence (RTP) systems were developed using brominated phenolsulfonephthaleine derivatives, which exhibited red light excitation and the highest phosphorescence quantum yield reported so far. The RTP emission could be controlled by adding acid and alkali alternately, and a logic operation with half-subtractor function and dual-channel response was constructed based on these properties.
NATIONAL SCIENCE REVIEW
(2022)
Article
Chemistry, Analytical
Lin Chen, Shaoban Zhao, Yan Wang, Shiping Yu, Yongzhen Yang, Xuguang Liu
Summary: This study developed a heteroatom doping strategy to synthesize long-lived matrix-free phosphorescent B, N, P co-doped CDs (B, N, P-CDs) with cross-linked structure and rich hydrogen bonding network. By coating the surfaces of B, N, P-CDs with silica, the complex of B, N, P co-doped CDs and silica (B, N, P-CDs@SiO2) showed excellent RTP properties in aqueous solution and good biocompatibility, making it a potential phosphorescent bioimaging probe.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Alexander C. Brannan, Nguyen Le Phuoc, Mikko Linnolahti, Alexander S. Romanov
Summary: The molecular design and crystal lattice structure of halobenzonitrile-carbazoles have been investigated to achieve persistent room-temperature phosphorescence (pRTP). The commercially available carbazole derivatives exhibit efficient organic phosphors with high quantum yield and long excited state lifetime. Meanwhile, the laboratory-synthesized carbazole derivatives demonstrate thermally activated delayed fluorescence. In-depth photophysical studies reveal that luminescence originates from the mixed locally excited state/charge transfer state.
FRONTIERS IN CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jinyang Zhu, Junhua Hu, Qiang Hu, Xiaoyu Zhang, Elena Ushakova, Kaikai Liu, Shixun Wang, Xu Chen, Chongxin Shan, Andrey L. Rogach, Xue Bai
Summary: This study demonstrates the realization of white-light room-temperature long-lived afterglow emission from CD powder, with a synergy between the phosphorescence of the carbon core and the delayed fluorescence associated with surface C(sic)N moieties. By matching the singlet state of the surface groups of CDs with the long-lived triplet state of the carbon core, an efficient energy transfer is achieved.
Article
Chemistry, Physical
Bin Xu, Zifei Wang, Jian Shen, Jie Li, Yuehan Jia, Tianlong Jiang, Zhenhua Gao, Xue Wang, Xiangeng Meng
Summary: This study reports on the development of phosphorescent materials based on carbon dots (CDs) that can exhibit full-color and wide-range lifetime-tunable properties. These materials, activated by a metal-organic framework, show tunable emission wavelength and lifetime, making them potential candidates for encryption and information security applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Zetong Ma, Zhiqiang Yang, Lan Mu, Lisong Deng, Liangjian Chen, Bohan Wang, Xianfeng Qiao, Dehua Hu, Bing Yang, Dongge Ma, Junbiao Peng, Yuguang Ma
Summary: By manipulating the molecular orbital properties of excited states and relaxation processes, the emission behaviors of luminophores can be greatly altered. For example, by facile substituent effect on a rigid benzothiazino phenothiazine tetraoxide (BTPO) core, luminescence conversion from thermally activated delayed fluorescence (TADF) to ultralong room-temperature phosphorescence (URTP) can be achieved. Dispersed in a polymer matrix, the BTPO derivatives exhibit a persistent bright green afterglow with long lifetimes of up to 822 ms and decent quantum yields of up to 11.6%.
Article
Chemistry, Physical
Zong Yu Wu, Yan Yu Chen, Li-Jyuan Lin, Hsu-Cheng Hsu
Summary: This study demonstrates a lead-free gamma-CsSnI3 perovskite random lasing operated at room temperature, with high-purity gamma-CsSnI3 films grown by chemical vapor deposition showing prolonged stability and achieving a random laser with a high Q-factor (approximately 3000) at excitation energy above 18 mJ/cm(2).
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Engineering, Environmental
Wen-Bo Zhao, Dan-Dan Chen, Kai-Kai Liu, Yong Wang, Rui Zhou, Shi-Yu Song, Fu-Kui Li, Lai-Zhi Sui, Qing Lou, Lin Hou, Chong-Xin Shan
Summary: In this work, carbon dots (CDs) with near-infrared-I (NIR-I) emission and near-infrared-II (NIR-II) absorption properties were successfully developed. The CDs exhibited NIR fluorescence and photothermal effect under NIR light illumination. The D-p-A charge-transfer state of the CDs resulted in NIR-II absorption with a maximum peak at 1033 nm, while the large conjugated sp2 domain led to NIR-I emission at 670 nm. Multiphoton-induced NIR-I emission with a quantum yield of 29% and NIR-II induced heat with a photothermal conversion efficiency of 41.19% were achieved. The research also demonstrated the potential application of the CDs in multiphoton bioimaging and photothermal therapy of cancers.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Jingran Gao, Xiulan Wu, Xin Jiang, Ming Li, Rongxing He, Wei Shen
Summary: This study successfully obtained carbon dots composites with long-lived afterglow and ultra-high afterglow quantum yields by embedding the luminescent centers of ciprofloxacin into a formed rigid boric acid matrix. The carbon dots composites exhibited dual-mode afterglow features at room temperature, as well as distinctive temperature-responsive color-tunable properties. Furthermore, the composites achieved ultra-long phosphorescence with a lifetime of up to 1.11 s at low temperatures and an afterglow quantum yield of 40.97% in CB-VII, demonstrating great potential for advanced information encryption and anti-counterfeiting applications.
Review
Chemistry, Multidisciplinary
Huixian Shi, Yang Wu, Jiahui Xu, Huifang Shi, Zhongfu An
Summary: Carbon dots (CDs) have emerged as a new generation of nano-luminescent materials and attracted extensive attention due to their excellent optical properties, wide source of raw materials, low toxicity, and good biocompatibility. However, systematic summaries on CDs with persistent luminescence are rare. This article provides a summary of recent progress on persistent luminescent CDs, including luminous mechanism, synthetic strategies, property regulation, and potential applications.
Article
Chemistry, Multidisciplinary
Biquan Xiong, Lulu Si, Longzhi Zhu, Rong Wu, Yu Liu, Weifeng Xu, Fan Zhang, Ke-Wen Tang, Wai-Yeung Wong
Summary: A mild and efficient Zn(II)-catalyzed regioselective 1,6-hydroarylation of para-quinone methides (p-QMs) with electron-rich arenes protocol is reported. A variety of electron-rich arenes and para-quinone methides are well tolerated under mild conditions, delivering a broad range of triarylmethanes in good to excellent yields. The present method also works well for the hydroarylation of p-QMs with other nucleophiles, such as aniline, indole and phenol derivatives, offering the corresponding triarylmethanes with good yields under the standard conditions. The possible mechanism for the formation of C(sp(3))-C(sp(2)) bonds in hydroarylation reactions has been explored by step-by-step control experiments, and the reaction may follow a second-order manner in a chemical kinetic study.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Wai-Hong Yu, Sze-Chun Yiu, Mei-Tung Lau, Po-Yu Ho, Pik-Ling Lam, Chung-Hin Chui, Wai-Yeung Wong
Summary: In this study, a series of neutral cyclometalated platinum(II) complexes were synthesized and their structural, photophysical, electrochemical, and aggregation induced emission (AIE) properties were systematically studied. One of the complexes showed bactericidal activity against Staphylococcus aureus (S. aureus) and methicillin-resistant S. aureus (MRSA) without noticeable cytotoxicity to human skin cells, suggesting its potential use for antibacterial therapy against S. aureus and MRSA-infected skin diseases.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Peng Tao, Zhuang Lv, Fang-Qing Zhao, Xiao-Kang Zheng, He Jiang, Wentao Li, Yongjing Deng, Shujuan Liu, Guohua Xie, Wai-Yeung Wong, Qiang Zhao
Summary: The excited-state manipulation of phosphorescent iridium(III) complexes is important for their photofunctional applications. A new molecular design strategy called random cyclometalation is proposed for the effective excited-state manipulation of these complexes. By using this strategy, two series of new and separable methoxyl-functionalized isomeric iridium(III) complexes are synthesized, resulting in a dramatic tuning of their phosphorescence properties. These complexes exhibit intense phosphorescence ranging from yellow to deep-red colors and high photoluminescence quantum yields.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Erfeng Kou, Wei Li, Junjie Lin, Haoran Zhang, Xuejie Zhang, Yingliang Liu, Bingfu Lei
Summary: This study reported a new type of self-assembled photosensitive carbon nanocrystals (SPCNs), which were synthesized from o-phenylenediamine and l-cysteine. The macromolecules aggregated through carbonization to form carbon dots and then formed stable spiral nanorings through pi-pi stacking and disulfide bonds. Intriguingly, these nanorings further assembled into tetragonal SPCNs through hydrogen bonding. SPCNs showed potent and broad-spectrum antibacterial bioactivity and could effectively inhibit the bioactivity of R. solanacearum by disrupting membrane structure, redox, histidine, and chemotaxis metabolism pathway, as revealed by transcriptome analysis.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Tao Li, Chuang Feng, Biquan Xiong, Xuhui Zhu, Zhicai He, Wai-Yeung Wong
Summary: In this study, we demonstrate a charge transfer photosystem driven by an electric dipole moment using amine-containing polyfluorene polyelectrolyte (PFN) and inorganic semiconductor matrices (WO3) as building blocks. The interfacial dipoles formed between PFN and WO3 promote a nonuniform charge distribution and enhance the efficiency of photoactivity, providing insights into the design of advanced heterojunction photocatalysts.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Xiaoman Huang, Junjie Lin, Jiarong Liang, Erfeng Kou, Wenxiao Cai, Yinjian Zheng, Haoran Zhang, Xuejie Zhang, Yingliang Liu, Wei Li, Bingfu Lei
Summary: Carbon dots doped with pyridinic nitrogen (Lev-CDs) were synthesized by the one-pot hydrothermal method, and the structure-function relationship between functional groups on Lev-CDs and photosynthesis of Chlorella pyrenoidosa was proposed. Pyridinic nitrogen plays a key role in the positive effect on photosynthesis caused by Lev-CDs. Lev-CDs act as electron donors and supply photo-induced electrons to the photosynthetic electron transport chain, enhancing the electron transfer rate, the activity of photosystem II, and the Calvin cycle.
Review
Chemistry, Physical
Huilin Hou, Gang Shao, Yang Wang, Wai-Yeung Wong, Weiyou Yang
Summary: Conversion of solar energy into H-2 by photoelectrochemical water splitting is an ideal solution to address the energy crisis and environmental issues. The construction of photoanodes on rational designed substrates is crucial for the high efficiency and stability of PEC reactions. This review provides an overview of representative strategies for controlled fabrication of photoanodes on substrates, including conductive glass, metal, sapphire, silicon, silicon carbide, and flexible substrates. Finally, future challenges and research directions in this area are proposed.
Review
Chemistry, Multidisciplinary
He Jiang, Jibiao Jin, Wai-Yeung Wong
Summary: Multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters have received significant attention for their high emission efficiency and narrow emission profile, making them a hot topic in organic electroluminescence (EL) research. However, the slow reverse intersystem crossing (RISC) rate of MR-TADF emitters due to the large energy gap (ΔE-ST) and small spin-orbit coupling (SOC) matrix elements between singlet and triplet excited states hinders their further development in organic EL devices. Innovative molecular design strategies, including heavy atom integration, π-extended MR frameworks, and metal perturbation, have been developed to enhance the RISC process of MR-TADF emitters for high-performance EL devices. This article provides an overview of the recent progress in MR-TADF emitters with fast RISC rates (> 10(-5) s(-1)), focusing on molecular design, optoelectronic properties, and device performance of organic light-emitting diodes (OLEDs), with the aim of systematizing knowledge in this field for the thriving development of highly efficient MR-TADF emitters. Finally, the challenges and future prospects of MR-TADF materials are comprehensively discussed.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Shujie Liang, Xiaohui Zhong, Zuqi Zhong, Hong Deng, Wai-Yeung Wong
Summary: Photoconversion of CO2 into value-added fuels has attracted significant attention, but is hindered by inefficient thermodynamics and reaction dynamics in diluted CO2. In this study, a bipyridine-based polyimide polymer was designed to anchor a single Ni site for diluted CO2 photoreduction. The resulting Ni single atomic catalysts exhibited superior activity and selectivity, achieving high generation activity and CO selectivity over water splitting. Mechanistic analyses revealed the role of highly dispersed Ni atoms in effective CO2 binding and activation, leading to efficient solar-driven CO2 reduction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
He Jiang, Hanlin Li, Jiahao Qiu, Jibiao Jin, Chunying Xi, Peng Tao, Baohua Zhang, Dongge Ma, Wai-Yeung Wong
Summary: A molecular design strategy of excited state manipulation from charge-transfer (CT) to hybridized local and charge-transfer (HLCT) was proposed by adjusting the cyano position on the pyridine acceptor. The HLCT material exhibited high-efficiency blue electroluminescence with external quantum efficiency (EQE) up to 6.49% in vacuum-evaporated OLEDs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Peng Tao, Xiao-Kang Zheng, He Jiang, Xinghao Sheng, Yongjing Deng, Yuk Yin Ian Chan, Qiang Zhao, Wai-Yeung Wong
Summary: A pair of high-efficiency deep-red emissive ionic iridophosphors (Ira and Irb) with high photoluminescence quantum yields (PLQYs) are designed by using 1-(thiophen-2-yl)isoquinoline as the cyclometalating ligand. Tetraarylborate anions are selected to improve their PLQYs in both solution and aggregated states, enabling efficient electroluminescence via a solution-processed approach. The iridophosphors emit intense deep-red room-temperature phosphorescence, exhibit high PLQYs in solution and neat films, and show potential for high-performance electroluminescence.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Multidisciplinary
He Jiang, Hanlin Li, Jibiao Jin, Govardhana Babu Bodedla, Peng Tao, Dongge Ma, Wai-Yeung Wong
Summary: We designed and synthesized two novel deep-blue emitters based on anthracene and pyrene moieties for highly efficient TTA-based OLEDs. The twisted conformation of the molecules effectively interrupted p-conjugation, resulting in intense deep-blue emission with high photoluminescence quantum yields. The deep-blue OLEDs using these emitters achieved maximum external quantum efficiencies of 4.78% and 5.48% with excellent color purity.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Yingying Qin, Linli Xu, Zhi Zhu, Wai-Yeung Wong
Summary: By coating polydopamine (pDA) shell on the surface of CdS nanorods, the absorption capacity of visible light is improved and the charge transfer dynamics is enhanced. The Schottky junction facilitates the electron transfer from CdS to NiS, while suppressing electron backflow. The optimized CdS@pDA/NiS composite demonstrates an apparent quantum efficiency (AQE) of 25.7% and a photocatalytic H-2 evolution rate of 9.31 mmol h(-1) g(-1), which is significantly higher than pristine CdS and CdS@pDA. This work provides a valid case for producing clean energy.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Xianhong Chen, Xiaodong Shi, Pengchao Ruan, Yan Tang, Yanyan Sun, Wai-Yeung Wong, Bingan Lu, Jiang Zhou
Summary: An in situ etching strategy is proposed to construct an interfacial layer with porous structure on the surface of zinc foil, which can improve the utilization efficiency and service life of zinc-metal anodes in aqueous zinc-ion batteries.
Review
Chemistry, Multidisciplinary
Xiaoyan He, Yihao Zheng, Chaofan Hu, Bingfu Lei, Xingcai Zhang, Yingliang Liu, Jianle Zhuang
Summary: This article provides a detailed review of the recent advances in the application of carbon dots (CDs) embedded in various inorganic matrices (IMs), as well as a summary of the interaction and luminescence mechanisms between CDs and IMs. The synthetic strategies of constructing composites and the roles of IMs in facilitating the applications of CDs are emphasized. The article also proposes future research directions and challenges in this field.
MATERIALS HORIZONS
(2024)
