RESEARCH IN MICROBIOLOGY
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2022
·
IF 3.946
Yuanyuan Song,Ziqi Wang,Yijing Long,Yang Mao,Feng Jiang,Yuanyuan Lu
Candida albicans can form biofilm on biotic and abiotic surfaces of medical implants to cause superficial and systemic infections under specific condition. The formation of hyphae and matrix of C. albicans are considered as probable virulence factors . We assessed the inhibitory activities of 26 anthraquinones against C. albicans biofilm formation, which were substituted by different functional groups including hydroxyl groups, amino groups, carboxyl groups, alkyl groups, and glycoside groups at C1- or C2-position. Among them, anthraquinones without substituents at other positions but only an alkyl group attached to C2-position, namely 2-alkyl-anthraquinones were determined to have significant anti-biofilm activities. Furthermore, 2-ethylanthraquinone can significantly affect genes related to extracellular matrix ( PMT6 and IFD6 ), and hyphal formation ( HWP1 , ECE1 and EFG1 ), leading to the disrupted formation of biofilm, by detail transcriptomics analysis. We believed that 2-ethylanthraquinone could inspire more discoveries of anti-biofilm agents against C. albicans .
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SENSORS AND ACTUATORS B-CHEMICAL
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2022
·
IF 9.221
Yujuan Qin,Pengcheng Huang,Fang-Ying Wu
With food safety problems abounding, it is essential to explore some efficient and effective methods for monitoring food quality. To this end, we have developed a histamine-responsive carbon dots (CDs)-based sensing system for visual monitoring of food spoilage. In this system, the aldehyde group on the surface of CDs serves as the recognition sites to combine with the amino group on histamine to form a Schiff base that effectively enhances the fluorescence. On the other hand, 1-aminoanthraquinone (ANQ) was introduced as a reference signal to endow the fluorescent probe with self-calibrating capacity. As the histamine concentration increases, linear ratiometric response was obtained accompanied with a distinguishable fluorescence color change from red to blue. Besides, test strips-based smartphone visual assays were successfully used to evaluate and monitor the histamine levels in fish samples. Our proposed sensing strategy has been demonstrated to be efficient and robust along with great potential for real-time visual monitoring of food spoilage.
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ChemSusChem
·
2022
·Vol. 15
·期 16
·e202200741
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IF 9.14
Ziyuan Xiu,Ming Zheng,Jiadong Li,Feng Wei,Changchang Dong,Mingrui Zhang,Xin Zhou,Xiaojun Han
Graphical Nitrogen reduction : A bionic nitrogen fixation system composed of Fe-VS 2 nanosheets and 1-aminoanthraquinone-functionalized polymethacrylic acid (1-AAQ-PA) matrix is fabricated with 1-AAQ-PA as the electron medium to achieved high NH 3 yield rate of 31.6 μg h −1 mg −1 and faradaic efficiency to NH 3 of 23.1 % in 0.05 m Li 2 SO 4 electrolyte at −0.35 V vs. reversible hydrogen electrode. This work provides inspiration and insights for the development of effective catalyst systems for nitrogen reduction. Electrochemical N 2 fixation is considered to be a promising alternative to Haber–Bosch technology. Inspired by the composition and structure of natural nitrogenase, Fe-doped VS 2 nanosheets were prepared via one-step solvothermal method. The electron transfer system mediated by organic conductive polymer (1-AAQ-PA) was constructed to promote the electron transfer between Fe-VS 2 nanosheets and the electrode in electrocatalytic N 2 reduction reaction (NRR). The obtained 1-AAQ-PA−Fe-VS 2 electrode converted N 2 to NH 3 with a yield of 31.6 μg h −1 mg −1 at −0.35 V vs. reversible hydrogen electrode and high faradaic efficiency of 23.5 %. The introduction of Fe dopants favored N 2 adsorption and activation, while the Li−S bond between Fe-VS 2 and Li 2 SO 4 effectively inhibited hydrogen evolution. The highly efficient electron utilization in the electrocatalytic NRR process was realized using the 1-AAQ-PA as the electron transfer medium. Density functional theory calculations showed that N 2 was preferentially adsorbed on Fe and reduced to NH 3 via both distal and alternating mechanism.
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POLYMER
·
2021
·
IF 4.43
Xiaojiao Li,Hong-bin Sun,Xudong Sun
Polymeric membranes obtained much attention for decades owing to low cost, ease of process, and operation for battery separators, water purification , medical, etc., especially for the preparation of portable device materials. In this paper, we designed a membrane with polysulfone (PSF) grafted anthraquinone-hydroanthraquinone, namely the PSFAQ membrane. Various characterization (such as field emission scanning electron microscopy , transmission electron microscopy , etc.) and battery performance (such as galvanostatic charge/discharge test, cyclic voltammetry , etc.) indicated that the PSFAQ polymer membrane as an electrode can improve its electrochemical performance through pores and exposed anthraquinone-hydroanthraquinone redox couple. Zinc ion battery (ZIB) was assembled with PSFAQ membrane and metallic zinc as the electrode pair. This research proposes a new, safe, and inexpensive material that can be used for water system energy storage.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Yao Tian,Zhipeng Zhang,Nan Gao,Pengcheng Huang,Fang–Ying Wu
In this work, a label-free, selective, and sensitive luminescent sensing platform was established for tyrosinase (TYR) activity monitoring and its inhibitor screening using one kind of lanthanide coordination polymer nanoparticles AMP–Tb/Ag + . By taking advantage of the specific binding and redox properties of Ag + incorporated into the AMP–Tb network and dopamine (DA) as the product of the model substrate tyramine , the enzymatic reaction and the signal change of the sensing platform was effectively linked. The cooperative effect of a weakened energy transfer from AMP to Tb 3+ by altering the electronic structure of Ag + and an efficient photoinduced election transfer (PET) process caused by dopaquinone facilitated the luminescence quenching of Tb 3+ . Thus, this luminescent sensing platform could be employed for quantitative evaluation of TYR activity. There was a good linear range for TYR activity from 0.08 to 0.20 U mL − 1 with a low detection limit of 0.004 U mL − 1 . Furthermore, this assay was successfully applied to accurate determination of TYR activity in human serum samples and efficient screening of TYR inhibitors. Considering unique spectral characteristics of lanthanides along with operation simplicity and superior analytical performance, this sensing platform is very promising in clinical diagnosis and drugs screening for TYR–associated diseases.
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FIBERS AND POLYMERS
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2018
·Vol. 19
·期 10
·2134-2138
·
IF 1.353
Wang Zongqian,Li Changlong,Zhang Hulin,Liu Zhi
Chromophore incorporated into the protein chains through residue modification on silk fibroin will be an important way to get new dyeing technology with improved color fastness. Herein, 1-aminoanthraquinone diazonium salt was prepared and used for the modified dyeing on tyrosine of silk fibroin. The silk after modified dyeing was measured by UV-Vis, FTIR, MS, 1 H-NMR, Data color, and other testing techniques. Interestingly, the resulting silk showed excellent rub and wash fastness. The enhanced color fastness is contributed by an electrophilic substitution reaction between 1- aminoanthraquinone diazonium salt and the ortho position of phenolic hydroxyl in tyrosine molecular. Moreover, the mechanical property of silk was protected effectively by the mild coupling modified dyeing, better than the traditional acid dyeing under high temperature for a long time. This facile strategy provides an alternative approach to silk dyeing and benefits the silk applications.
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IONICS
·
2017
·Vol. 24
·期 2
·549-561
·
IF 2.062
Ma Guofu,Hua Fengting,Sun Kanjun,Feng Enke,Zhang Zhiguo,Peng Hui,Lei Ziqiang
The design of composited porous carbon-based electrode materials is keyed to improve the electrochemical performance for supercapacitors. Here, the natural carrot is used as a precursor to prepare porous carbon skeletons (CCs). Three different anthraquinones: anthraquinone (AQ), amino-anthraquinone (1-AAQ), and 2-aminoanthraquinone (2-AAQ) are used to modify the carbon skeletons with absorption. The maximum capacitance is obtained from material modified with 1-AAQ; it (1-AAQ-CC2) exhibits a noticeable pseudocapacitive performance with a brilliant capacitance of 328 F g −1 at 0.5 A g −1 and excellent cyclic stability (95% capacitance retention after 5000 cycles at 3 A g −1 ) in 2 mol L −1 KOH aqueous electrolyte. Moreover, the assembled 1-AAQ-CC2/1-AAQ-CC2 symmetric supercapacitor exhibits a high energy density of 14.8 Wh kg −1 at a power density of 240 W kg −1 operated at the voltage range of 0 to 1.8 V in 0.5 mol L −1 Na 2 SO 4 aqueous electrolyte. These results exhibit eco-friendly and low-cost design of organic and inorganic composite electrode materials for high-performance supercapacitors.
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JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Zuo Pengli,Peng Jun,Yao Yuyang,Tan Wei,Cheng Lan,Zhang Jinyu,Lu Xiuhua
Due to the unique chemical and biomedical properties of carbon dots (CDs), they have increasingly obtained the attention in many research fields, for example, bioimaging, fluorescence sensing, and drug delivery, etc. Recently, it was found that, under light excitation, CDs can also be exploited as a novel photosensitizer to prepare reactive oxygen species (ROS), which expand their applications in the field of photodynamic therapy for cancer treatment. Nevertheless, the high cost and complex fabrication approach of CDs significantly limit their applications. To address this issue, bottom-up routes usually utilize sustainable and inexpensive carbon precursor as starting materials, employed N,N-dimethylformamide (DMF) or ethanol as an environmental-friendly solvent. Bottom-up approach was energy efficient, and the purification process was relatively simple by dialysis. Therefore, carbon dots (CDs) were facilely fabricated in a one-pot solvothermal process using 1-aminoanthraquinone as a precursor, and their application as photosensitizers for in vitro antitumor cells, especially photodynamic therapy (PDT) was established. Then the photophysical and nanoscale dimensions properties of the fabricated CDs were characterized via TEM, UV–visible, fluorescence, and FT-IR spectroscopy. The synthesized N-doped CDs can easily dissolve in water, possess very low biotoxicity, yellow-light emission (maximum peak at 587 nm). More importantly, PDT studies demonstrated that the obtained CDs possess a high singlet oxygen yield of 35%, and exhibit significant phototoxicity to cancer cells upon 635 nm laser irradiation. These studies highlight that N-doped CDs can be facilely synthesized from only one precursor, and are a potentially novel theranostic agent for in vivo PDT.
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JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Johar Zeb,Shuai Zhang,Muhammad Bilal Ahmed Qureshi,Manas Kumar Mandal,Qunhui Yuan,Wei Gan
Photoinduced intra and intermolecular charge transfer processes are vital in the solar energy conversion system. This research compared the photoinduced charge transfer processes of 1-aminoanthraquinone (AAQ) and 1,5-diaminoanthraquinone (DAAQ) molecules in ethanol using steady-state and transient absorption spectroscopic techniques, along with density functional theory (DFT) methods. The results revealed that AAQ shows greater intramolecular charge transfer (ICT) than the intermolecular charge transfer process. On the other hand, DAAQ, which has a lower solubility in ethanol and exhibits strong π-π stacking, displays higher intermolecular charge transfer processes than AAQ alongside its ICT process. The lifetimes for ICT and intersystem crossing (ISC) are shorter for DAAQ than AAQ molecules, representing their fast ICT and ISC processes. This work provides a comprehensive insight into the photoinduced intra- and intermolecular charge transfer processes of these two molecules, explaining their respective suitability as additives in photovoltaics and other optoelectronic devices due to their photoinduced charge transfer processes and structural planarity.
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