Review
Chemistry, Inorganic & Nuclear
Chong-Yang Shi, Long Li, Wei Kang, Yan-Xin Zheng, Long-Wu Ye
Summary: The efficient and selective construction of carbon-carbon bond in an atom-economic and mild way remains a core aspect of modern organic synthesis. The strategy of Claisen rearrangement triggered by catalytic alkyne alkoxylation has unique advantages and has attracted widespread attention in the past two decades. Both intramolecular and intermolecular protocols provide practical and facile approaches for the synthesis of complex compounds with valuable core skeletons.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Shen Shen, Glib V. Baryshnikov, Qishan Xie, Bin Wu, Meng Lv, Hao Sun, Zhongyu Li, Hans agren, Jinquan Chen, Liangliang Zhu
Summary: This research develops a host-guest energy transfer relay strategy to improve the phosphorescence lifetime of multi-twisted luminophores, achieving persistent room-temperature phosphorescence (pRTP) that is visible to the naked eye. Additionally, photoexcitation-induced molecular rearrangement is used to further prolong the phosphorescence lifetime. This work is significant in advancing our understanding of molecular photophysical mechanisms and guiding the study of molecular systems that are difficult to achieve pRTP.
Article
Chemistry, Multidisciplinary
Jiayu Zhang, Mengna Zhu, Yunxiang Lu, Xinghong Zhang, Shuzhang Xiao, Haichuang Lan, Tao Yi
Summary: This study presents a rational design strategy for the development of high-contrast stimulus-responsive phenothiazine derivatives with dual emissions and mechanochromism. The designed derivatives exhibit significant emission differences under mechanical force and also demonstrate aggregation-induced emission. These materials show promise for applications in encryption and anti-counterfeiting.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Xing Zhang, Shou-Ting Wu, Xian-Jiong Yang, Ling-Yi Shen, Ya-Li Huang, Hong Xu, Qi-Long Zhang, Tao Sun, Carl Redshaw, Xing Feng
Summary: This article investigates the formation of metal coordination between a triphenylamine-functionalized salicylaldehyde Schiff base and a copper(II) ion, revealing the dynamic and stable nature of the coordination process. The probe exhibits high sensitivity and specificity towards copper(II) ions, making it a promising fluorescence probe for detection applications.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Alessia Colombo, Giulia De Soricellis, Francesco Fagnani, Claudia Dragonetti, Massimo Cocchi, Bertrand Carboni, Veronique Guerchais, Daniele Marinotto
Summary: The preparation and characterization of three new complexes with high luminescence are reported. Among them, the complex [(PtLCl)-Cl-1] shows the longest lifetime and intense NIR emission, allowing the fabrication of high performing OLEDs.
DALTON TRANSACTIONS
(2022)
Article
Multidisciplinary Sciences
Waygen Thor, Yue Wu, Lei Wang, Yonghong Zhang, Peter A. Tanner, Ka-Leung Wong
Summary: The authors report a lanthanide-based compound that exhibits long-lived phosphorescence at low temperatures, showing potential applications in fields such as anti-counterfeiting and switches. Organolanthanide compounds typically have triplet state lifetimes up to tens of milliseconds, while this compound exhibits phosphorescence observable by the naked eye for up to 30 s at 77 K, providing insights into important photophysical processes.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Feng He, Chengyu Xing, Yurui Xue
Summary: Graphdiyne-based metal-free catalysts, such as 1,2,4-triamino-graphdiyne (TAGDY), exhibit excellent electrocatalytic performances for hydrogen evolution in acidic conditions due to their unique nanostructure facilitating fast proton-electron transfer. Experimental studies and theoretical calculations reveal that TAGDY enhances catalytic activities by inducing transition between certain carbon sites, presenting a new level of understanding for the catalytic mechanism of metal-free catalysts.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Zungui Zhao, Furen Zhang, Dongyang Wang, Liang Deng
Summary: Hydrogermylation of alkenes and alkynes is a straightforward method for synthesizing organogermanium compounds, which have applications in organic synthesis, medicinal chemistry, and material science. This paper reviews the advances in transition-metal-catalyzed hydrogermylation of unsaturated carbon-carbon bonds, including alkenes, alkynes, dienes, and allenes, and aims to provide readers with an overview of the current status in this field. The progress, problems, and future perspectives are discussed.
CHINESE JOURNAL OF CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Ashish Chanana, Hugo Larocque, Renan Moreira, Jacques Carolan, Biswarup Guha, Emerson G. Melo, Vikas Anant, Jindong Song, Dirk Englund, Daniel J. Blumenthal, Kartik Srinivasan, Marcelo Davanco
Summary: Researchers have successfully integrated a quantum emitter single-photon source with an ultra-low loss silicon nitride photonic circuit, demonstrating triggered and pure single-photon emission. This advancement is a step forward in the development of scaled chip-integrated photonic quantum information systems.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Physical
Javier Corpas, Pablo Mauleon, Ramon Gomez Arrayas, Juan C. Carretero
Summary: This paper discusses the importance of the catalytic functionalization of alkynes with organoboron reagents in synthesis and the latest research progress, including innovations in asymmetric internal alkynes, stereochemistry, and metal migration. It focuses on the practicality, limitations, and challenges for future research of the mechanisms and synthetic methods.
Article
Chemistry, Physical
Hao Zhang, Xian He, Xiang-Ai Yuan, Shouyun Yu
Summary: Expanding the discovery of biologically or pharmacologically active molecules can be achieved by transforming chemical space into three-dimensional space through stereospecific reactions. This study focuses on alkene subunits as ubiquitous structural motifs and inexpensive starting points for this purpose. A kinetic resolution method enabled by photoexcited chiral copper complex-mediated alkene E -* Z isomerization was disclosed, which allowed for the enantiodivergent synthesis of 2-cinnamylpyrrolines. Mechanistic experiments and DFT calculations revealed the reasons for the observed kinetic resolution efficiency, which is due to the different association abilities between two enantiomers and the chiral copper complex in the ground state (thermodynamics) and the different overall sensitization rates of the substrate-catalyst complex in the excited state (kinetics). This revitalized protocol of kinetic resolution shows wide functional group compatibility and enables the exploration of three-dimensional chemical space, thereby providing an advanced and complementary method for stereochemistry control in triplet-state photoreactions.
Article
Chemistry, Multidisciplinary
Lian Liu, Jie Ma, Jiamin Pan, Denghui Li, Huiling Wang, Honggao Yang
Summary: The TPA-ME fluorescent probe, designed based on the triphenylamine derivative TPA-CHO, shows excellent selectivity and anti-interference properties towards Hg2+ under aggregation-induced emission (AIE) effects. The fluorescence intensity of TPA-ME exhibits a red-shift from blue to green with increasing Hg2+ concentration, and it has a linear response with a low limit of detection (LOD). The theoretical calculation and experimental results are in good agreement, and Hg2+ can be easily detected using a conveniently prepared test paper.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Weidong Qiu, Xinyi Cai, Zijian Chen, Xiaofan Wei, Mengke Li, Qing Gu, Xiaomei Peng, Wentao Xie, Yihang Jiao, Yiyang Gan, Weimin Liu, Shi-Jian Su
Summary: This study discovered a strong spin-orbital coupling effect in a purely organic compound, achieving a high phosphorescence rate and intersystem crossing process. The flexible molecule skeleton and heavy atom sulfur and nitrogen atoms providing n-pi* transition character contribute to efficient spin-orbital coupling, leading to the fabrication of a high-efficiency purely organic phosphorescence light-emitting diode.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
O. N. Tchaikovskaya, N. G. Dmitrieva, E. N. Bocharnikova, V. S. Chaidonova, P. V. Avramov
Summary: The study found that in the migration of excitation energy of psoralen compounds, singlet-triplet transition plays a major role, and substances with an OCH3-group in the structure have the strongest effect on the spectral-luminescent characteristics.
FRONTIERS IN CHEMISTRY
(2021)
Article
Meteorology & Atmospheric Sciences
Shenbo Wang, Xiangge Fan, Yifei Xu, Ruiqin Zhang, Baozeng Ren
Summary: The non-linear relationship between particle sulfate and SO2 is still unclear. Continuous observations in a typical city in Northern China from 2017 to 2020 showed a decrease in SO2 concentration but an increase in SO42- concentration and sulfur oxidation ratio in 2018-2019. This could be due to variations in sulfate formation, particularly the O-2 + TMI oxidation. Factors such as particle pH, SO2, and Mn concentration influenced the reaction rate. The decrease in particle pH had a larger impact on the reaction rate compared to the decrease in SO2 or Mn concentration.
ATMOSPHERIC RESEARCH
(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
Polymer Science
Mei-Tung Lau, Zikang Li, Wai-Yeung Wong
Summary: Radical-containing metallopolymers (RCMPs) are synthesized and investigated for their thermoelectric properties. The composites of RCMPs and single-walled carbon nanotubes (SWCNTs) are studied, and it is found that the composite R3/SWCNT exhibits the highest electrical conductivity and power factor compared to R1 and R2. Incorporation of the ferrocenyl unit into the polymer backbone leads to better thermoelectric performance than having the unit at the periphery.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Jibiao Jin, Chunbo Duan, He Jiang, Peng Tao, Hui Xu, Wai-Yeung Wong
Summary: Developing deep-blue TADF emitters with high efficiency and color purity is challenging. A design strategy integrating asymmetric O-B-N MR unit into traditional N-B-N MR molecules was proposed. Three deep-blue MR-TADF emitters with different MR units were synthesized, and the proof-of-concept emitter ODBN showed respectable deep-blue emission. The OLED using ODBN as emitter achieved a high external quantum efficiency of 24.15% with deep-blue emission.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Xiaokun Fan, Zhen Mu, Zhao Chen, Yunfeng Zhan, Fanyuan Meng, Yang Li, Guichuan Xing, Wai-Yeung Wong
Summary: An alloyed quantum dot with a core/shell structure of Cd0.194Zn0.806Se0.406S0.594/ZnS was synthesized, which exhibited efficient green emission with high photoluminescence quantum yield (PL QY) and ultra-fast radiative transition rate. The quantum dot also showed potential for applications in light-emitting diodes (LEDs).
CHEMICAL ENGINEERING JOURNAL
(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)
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, Physical
Xinghao Sheng, Mingpan Yan, Bo Zhang, Wai-Yeung Wong, Nobuaki Kambe, Renhua Qiu
Summary: In this study, a mild and versatile nickel-catalyzed method for selectively functionalizing the C3 position of quinolines with various electrophiles was developed. Unactivated quinolines can be directly modified without the need for directing groups at room temperature. The reaction mechanism involves 1,4-addition of quinolines with nickel hydride species generated from β-H elimination of alkyl nickel intermediates, followed by subsequent nucleophilic attack and oxidative aromatization.
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.
Article
Materials Science, Multidisciplinary
Shuxin Wang, Hanlin Li, Zhen Song, He Jiang, Xiandi Zhang, Chui-Shan Tsang, Quanlin Liu, Lawrence Yoon Suk Lee, Dongge Ma, Wai-Yeung Wong
Summary: By constructing D-pi-A molecules and introducing pi-conjugated anthracene unit as part of an appropriate donor-acceptor structure, efficient HLCT emitters can be finely regulated and versatilely constructed. The blue OLEDs using TAP1 and TAP2 as emitters exhibit good color purity, high efficiency, and extremely low efficiency roll-offs. This study provides inspiration for the rational design of promising materials for high-performance blue OLEDs.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)