NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 9
·3654-3663
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IF 3.288
Dong-Mei Ma,Jing Wang,Hao Guo,Dong-Jin Qian
Thioxanthones (TXs) and viologens (VIOs) are important photo-sensitizers and electron mediators with interesting opto-electrochemical properties and potential applications for novel opto-electrical devices, displays, switches and sensors. Here, we reported the photophysical and electrochemical properties of newly synthesized TX–VIO binary derivatives, and their photo-/electrochromic displays in the ionic liquids and polymer gels. The precursor of TXBr (without the VIO substituent) gave off a blue light emission centered at about 437 nm with a quantum efficiency (QE) of approximately 0.2. For TX-VIOs, their QE was below 0.01; this significant luminescent quenching was attributed to an intramolecular energy transfer from the excited singlet state of TX to electroactive VIO. Thus, these TX–VIOs displayed good photochromic behaviors under ultraviolet and/or visible light radiation. Cyclic voltammograms of TX–VIOs showed two couples of chemically reversible waves centered at approximately −0.43 and −0.90 V (vs. Hg/Hg2Cl2). The former one was attributed to the electron transfer process of TX–VIO2+ ↔ TX–VIO+˙, and the latter one to that of TX–VIO+˙ ↔ TX–VIO0 together with that of TX(red)–VIO2+ ↔ TX(ox)–VIO2+. Finally, sandwiched types of transparent and flexible photo- and electrochromic devices were constructed with the use of TX–VIOs in the ionic liquids and polymeric gels as the light-sensitizer and color display layer. These devices displayed a good transmittance and good reversible color (pink, blue and colorless) change behavior under visible light radiation or an applied bias of −2.4 V.
研究领域:
化学
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材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yujie Feng,Yahui Liu,Andong Zhang,Changdong Zhang,Zhishan Bo
The application of photosensitizers has long been hindered by complex synthesis routes and poor water solubility. In this study, we report novel benzothioxene-based photosensitizers with significant improvements in both solubility and photodynamic efficiency. Among them, the amphiphilic molecule QA-BTXI stands out, offering exceptional water solubility and pronounced aggregation-induced enhancement of reactive oxygen species generation. At a low concentration of 25 μM, QA-BTXI exhibits potent antibacterial activity against Escherichia coli and Staphylococcus aureus. Additionally, QA-BTXI is synthesized in a cost-effective manner with 82% yield and a straightforward purification process. These findings present a promising approach to developing next-generation photosensitizers with broad potential for large-scale production and practical applications.
研究领域:
光动力疗法
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有机化学
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生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PEST MANAGEMENT SCIENCE
·
2024
·
IF 3.8
Wenjing Liu,Yong Li,Jun Liang,Yi Li,Gaofeng Zhu,Jianta Wang,Wenzhang Chen,Lei Tang,Lingling Fan
BACKGROUND Plant diseases infected by pathogenic fungi have a devastating effect on global agricultural and food industry yields. The development of novel, environmentally friendly, and efficient fungicides is an important technique for preventing and combatting phytopathogenic fungi. RESULTS Herein, 99 thiochroman-based derivatives containing hydroxyl, sulfoxide, sulfone, carbonyl, double bond, amino, imine, oxime, oxime ester, and amide moieties were synthesized. The antifungal activities of the target compounds against ten typical phytopathogenic fungi were also investigated. The bioassay results illustrated that most of the target compounds exhibited moderate to excellent antifungal effects against the tested fungi in vitro . Among these, thiochroman-oxime derivatives (12a–12m) exerted a promising inhibition effect, especially against Fusarium solani , Fusarium graminearum , Valsa mali , and Botrytis cinerea strains. Furthermore, the compounds 12f and 12g markedly suppressed the spore germination germ and tube growth. At the same time, they exerted excellent protective effects against potatoes infected by F. solani , making them superior to commercial fungicides Hymexazol and Chlorothalonil. Notably, the compounds 12d and 12f also showed excellent protective effects against cherry tomatoes infected by B. cinerea. Further mechanistic studies revealed that compound 12f exerted an antifungal effect by overtly altering the mycelium structure and remarkably increasing cell membrane permeability. Fortunately, the excellent bioactive compounds showed good safety against human hepatic cell lines (WRL-68). The preliminary structure–activity relationship analysis revealed that the introduction of hydroxyl or oxime fragments at the thiopyran ring might be significantly beneficial to antifungal activity. CONCLUSION This study provides thiochroman compounds that can be used in the development of novel botanical fungicides for the management of phytopathogenic fungi. © 2024 Society of Chemical Industry.
研究领域:
植物保护学
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农药化学
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分子生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Wen-Yuan Zhang,Yu-Xia Li,Wen-Le Zhang,Bo Wang,Xue-Qin Sun,Yu-Kui Hu,Jia-Cheng Liu
Porphyrin sensitizers were extensively studied due to their exceptional performance in dye-sensitized solar cells (DSSCs). In this study, three sensitizers (ZnP1, ZnP2, and ZnP3) with D-π-A structures containing heteroatom functional groups, such as triphenylamine, thianthrene and dibenzothiophene as electron donors, were designed and synthesized. The benzoic acid group, which functioned as an electron acceptor, and the strategically incorporated acetylene group enhance the light-harvesting abilities of the three sensitizers. Compared to ZnP2′s thianthrene and ZnP3′s dibenzothiophene, the incorporation of the triphenylamine electron donor in ZnP1 significantly improved electron transfer efficiency, short-circuit current density, and conversion efficiency. It also increased electron recombination resistance and prolonged electron lifetime, resulting in the best performance. Density functional theory (DFT) calculations confirmed these experimental findings.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
·
IF 3.99
Dong-Mei Ma,Xian Yu,Aishun Ding,Hao Guo,Dong-Jin Qian
Selective oxidation of organic sulfide under mild conditions has attracted growing attention because of its potential applications for the chemical transformation and degradation of toxic organics. Thioxanthones (TXs) are important photosensitizers for the photocatalytic oxidation of organic sulfides. This paper reports the fabrication of TX-functionalized silica nanocomposites, using a bottom-up self-assembling technique, and their application as heterogeneous photocatalysts for the selective oxidation of sulfides into sulfoxides. Two types of TXs, 3-hydroxy- 9H -thioxanthen-9-one (TXOH) and 9-oxo- 9H -thioxanthene-2,7-dicarboxylic acid (TXCOOH), were synthesized, and their monolayers were anchored covalently on the surface of silica nanoparticles (nanoSiO 2 ) via surface silanization and substitution reactions. The produced nanoSiO 2 TX and nanoSiO 2 TXCOOH composites emitted blue luminescence with an emission wavelength at approximately 430−434 nm; they exhibited a ∼10 nm red shift compared to TXOH and TXCOOH. Both nanocomposites acted as heterogeneous photocatalysts for the selective oxidation of aromatic thioethers into sulfoxides under mild conditions (radiation, air atmosphere, and room temperature). Good conversion efficiency and selectivity were obtained, particularly for those aromatic thioethers with benzyl- and electron-donating substituents. Since the TX monolayer was anchored covalently on the surface of nanoSiO 2 particles, the nanocomposites displayed good reusability and recyclability, in addition to facile separation of the reagents and photocatalysts from the reaction system.
研究领域:
纳米技术
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材料科学
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光催化
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有机化学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2025
·
IF 20.2
Rongfeng Yang,Fan Wang,Wan-er Cui,Wei Chen,Tianyu Lei,Dongjiang Chen,Dongxu Chen,Li Xia,Chi Zhang,Kaijun Cheng,Runyi Dai,Yichao Yan,Xiaobin Niu,Yin Hu
Lithium sulfur batteries are persistently investigated by the research community due to their high energy density property. However, in order to get such performance, based on the current pouch cell strategy, less electrolyte and more stacking electrodes need be applied, leading to the aggravated dendrite growth, dead lithium accumulation and electrolyte depletion. In this context, we report a regenerative redox mediator strategy, targeting the operation window of the lithium sulfur batteries. The redox mediator can spontaneously consume the dead lithium on the anode, then be re-oxidized on the cathode through electrochemical process. Based on this design, the lithium sulfur pouch cell can be fully charged at 1C for more than 140 cycles. Moreover, the regeneration mechanism is studied by in situ UV–vis spectroscopy. This work not only validates the effectiveness of redox mediator for improving the high rate charging and cycling of lithium sulfur pouch cells, but also excludes the invalid mediator type and provides the design concept, guiding the future development of high rate charging strategy for lithium sulfur batteries.
研究领域:
储能
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电化学
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材料科学
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）