ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Ya Chu,Weiqiang Zhang,Baoye Hu,Jinghong Wen,Mengmei Qin,Guangjiu Zhao
Regulation of surface ligands in hybrid organic–inorganic perovskite quantum dots (HOIP QDs) is key to enhancing their optoelectronic properties. However, achieving both high photoluminescence (PL) and long-term stability in chiral HOIP QDs remains challenging. Here, we report the use of chiral anthraquinone derivatives (AQ) as surface ligands, replacing conventional long-chain alkyl ligands, to construct two potassium-doped chiral QDs, (R)AQ-QDs and (S)AQ-QDs. These QDs exhibit high photoluminescence quantum yields (PLQYs) of 98.74 and 97.68%, respectively, along with notable stability. Optical characterization indicates an efficient chirality transfer from the organic ligands to the K0.23MA0.77PbBr3 lattice. Furthermore, density functional theory (DFT) calculations and femtosecond transient absorption (fs-TA) spectroscopy reveal reduced surface trap states, as evidenced by stronger ligand binding and prolonged carrier lifetimes. A white-light-emitting diode (LED) fabricated using the AQ-QDs shows a color rendering index (CRI) of 65.1 and a correlated color temperature (CCT) of 6169 K. The reported work highlights the potential of chiral ligand engineering in improving PL efficiency and stability in perovskite QDs.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Chenbin Tang,Bangshuai Wei,Wu Tang,Yan Hong,Meichen Guo,Xuesong He,Jiahui Hu,Shan Jia,Cong Fan
A novel small organic molecule namely N,N’-bis(2-anthraquinone)-dihydrophenazine (DAQ-DPZ, 270 mAh/g) with n-p-n molecular heterojunction configuration is designed as the bipolar electrode material for Li-dual-ion batteries. To delay the dissolution for small-molecule organic electrodes, DAQ-DPZ is further coated by a protective carbon layer (DAQ-DPZ@C) through the process called surface self-carbonization. As expected, the resulting DAQ-DPZ@C can show the peak discharge capacity of 269 mAh/g and high median potential of 2.62 V in 1.6–4.4 V (vs. Li + /Li), corresponding to the peak energy density of 704 Wh kg −1 in Li-dual-ion half cells. Furthermore, DAQ-DPZ@C in the symmetric Li-dual-ion batteries can deliver the peak discharge capacity of 88 mAh/g cathode and the peak energy density of 113 Wh kg -1 cathode , stably running for over 5000 cycles. To the best of our knowledge, these results are the top ones for small-molecule organic bipolar electrodes in the symmetric Li-dual-ion batteries.
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Molecular Catalysis
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2023
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IF 4.6
Ming Zhan,Yue Wang,Huai Liu,Rui Zhang,Lincai Peng,Junhua Zhang
Visible-light-driven upgrading of biomass and its derivatives into value-added chemicals under mild reaction conditions is an economical and sustainable strategy for biomass valorization. In this contribution, industrially-accessible anthraquinone and its derivatives (AQs) have been developed as efficient metal-free photocatalysts for the photo-oxidation of 5-hydroxymethylfurfural (HMF). Especially, a quantitative furans selectivity containing 86.0 % of 2,5-diformylfuran (DFF) and 13.6 % of 5-formyl-2-furancarboxylic acid (FFCA) was implemented at HMF conversion of 88.8 % over 2,6-dibromoanthraquinone (2,6-DB-AQ) catalyst under visible light illumination. In addition, the homogeneous 2,6-DB-AQ catalyst can be readily separated and recycled from the reaction mixture by a “water-assisted” precipitate method. Photophysical characterizations indicated that the introduction of bromine substituents on AQ enhances its visible light absorption ability, decrease its band gap energy and enables the catalyst with a more stable photoexcitation state. It has also been demonstrated that the lower photoexcitation energy of O 2 over 2,6-DB-AQ endowed the catalyst with better capacity for the activation of O 2 than that of AQ. These contributions should be in charge of the excellent catalytic activity of 2,6-DB-AQ for the photo-oxidation of HMF. This work demonstrates an efficient and recyclable organo-photocatalyst for the visible-light-mediated valorization of biomass-derived alcohols and aldehydes to value-added chemicals.
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JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Chen Zhao,Ayesha Aziz,Wenjing Lu,Hongmei Xu,Muhammad Asif,Shaomin Shuang,Chuan Dong
Mercury ion (Hg 2+ ) is considered a harmful neurotoxin, and real-time monitoring of Hg 2+ concentrations in environmental and biological samples is critical. Fluorescent probes are a rapidly emerging visualization tool owing to their simple design and good selectivity. Herein, a novel fluorescence (FL) probe 2-(4-((6-((quinolin-8-yloxy)methyl)pyridin-2-yl)methyl)piperazin-1-yl)anthracene-9,10-dione ( QPPA ) is designed using piperazine as a linker between the anthraquinone group, which serves as a fluorophore, and N 4 O as the Hg 2+ ligand. The probe exhibits FL “turn-on” sensing of Hg 2+ because the complex inhibits the photo-induced electron transfer (PET) process. Moreover, QPPA can overcome the invasion by other possible cations, resulting in a clear color change from orange to colorless with the addition Hg 2+ . The chelation of QPPA with Hg 2+ in a 1:1 ratio. Subsequently, the theoretically determined binding sites of the ligand to Hg 2+ are validated through 1 H NMR titration. The in situ QPPA –Hg 2+ complex can be subjected to Hg 2+ extraction following the introduction of S 2− owing to its robust binding capacity. The exceptional limit of detection values for Hg 2+ and S 2− are obtained as 63.0 and 79.1 nM (S/N = 3), respectively. Moreover, QPPA can display bright red FL in the presence of Hg 2+ in different biological specimens such as HeLa cells, zebrafish, onion root tip tissues, and water flea Daphnia carinata , further providing an effective strategy for environmental monitoring and bioimaging of Hg 2+ in living organisms.
研究领域:
分析化学
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环境科学
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生物医学
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PubMed
高影响因子
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