JOURNAL OF MEDICAL ENTOMOLOGY
·
2015
·Vol. 52
·期 3
·437-441
·
IF 1.953
Liu Xin Chao,Zhou Ligang,Liu Qiyong,Liu Zhi Long
The aim of this research was to evaluate larvicidal activity of the essential oil of Allium tuberosum Rottler ex Sprengle roots and its constituents against larval mosquitoes (Aedes albopictus Skuse). Essential oil of A. tuberosum was obtained by hydrodistillation and analyzed by gas chromatography and gas chromatography–mass spectrometry. The major constituents of the oil were found to be sulfur-containing compounds, including allyl methyl trisulfide (35.19%), diallyl disulfide (28.31%), diallyl trisulfide (20.91%), and dimethyl trisulfide (12.33%). The essential oil of A. tuberosum exhibited larvicidal activity against the fourth-instar larvae of Ae. albopictus, with an LC50 value of 18 μg/ml. The constituents compounds—diallyl trisulfide (LC50 = 4 μg/ml) and diallyl disulfide (LC50 = 6 μg/ml)—possessed stronger larvicidal activity than allyl methyl trisulfide (LC50 = 27 μg/ml) and dimethyl trisulfide (LC50 = 35 μg/ml) against the fourth-instar larvae of Ae. albopictus. The results indicated that the essential oil of A. tuberosum and its major constituents have good potential as a source for natural larvicides.
研究领域:
昆虫学
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植物化学
·
公共卫生
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TETRAHEDRON
·
2015
·
IF 2.641
Bo Liu,Ning Zhu,Hailong Hong,Limin Han
A novel methodology for the preparation of benzothiazole derivatives via the reaction of ortho -anilino disulfides with aryl and heteroaryl aldehydes catalyzed by Na 2 S·9H 2 O has been developed. The reaction mechanism was investigated by LC–MS and 1 H NMR. The disulfide was cleaved firstly by the interchange reaction of the disulfide and metal sulfide , and the resulting thiol reacted in situ with the aldehyde to form the corresponding benzothiazoline. Subsequently, the intermediate benzothiazoline reduced the disulfide to thiol and it was oxidized to benzothiazole. The excess benzothiazoline was oxidized by air and both halves of the disulfide were ultimately converted to the desired benzothiazole.
研究领域:
有机化学
·
药物化学
✓ 已验证
DOI
高影响因子
Science China-Technological Sciences
·
2021
·Vol. 64
·期 9
·2023-2032
·
IF 3.572
Pang Long,Zhong Wei,Wang QiuBo,Feng HaoHui,Dong HaoNan,Wang Song,Cong HaiLin,Shen YouQing,Yu Bing
Disulfide (DSF) has been proved good anti-tumor effect and even better with coadministration of Cu 2+ . In this work, we report the use of hyaluronic acid (HA) based materials to construct vectors for the delivery of both DSF and Cu 2+ . HA was firstly modified with polyethylene glycol monomethyl ether (mPEG) and polycaprolactone (PCL) to synthesize an amphiphilic polymer (HA-PEG-PCL). DSF could be loaded in the hydrophobic core and Cu 2+ could be cooperated to the negative hydrophilic segment. The Cu 2+ also played a role as crosslinking agent, which prevented DSF leakage prematurely, avoiding the bad side effects to normal tissues. The interaction between HA and CD44 improved the distribution of nanodrugs in tumor cells. When the nanodrugs were delivered to the cancer cell, the acidic micro-environment would separate the Cu 2+ from the surface, leading to the disintegration of the micelles, promoting the release of DSF from the micelle core. The results of in vitro and in vivo experiments showed that the DSF and Cu 2+ co-delivery vector constructed in this work could enhance the antitumor effect and have low biological toxicity.
研究领域:
生物材料学
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药剂学
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC COMMUNICATIONS
·
2024
·
IF 1.8
Haiyan Xu,Yuanyuan Huang,Yinchun Liang,Nan Wang,Dejun Dong,Mengke Wang,Weichun Huang,You Zi,Zhanping Yang
Herein, we present an efficient synthesis method utilizing Bi quantum dots (QDs) as catalysts for the photochemical oxidative coupling of thiols to disulfides under mild conditions. The protocol offers low catalyst loading, simplicity in reaction setup as well as high efficiency. Aromatic thiols and aliphatic thiols are successfully transformed into disulfides with good to quantitative yields, demonstrating tolerance to various substituents and heterocycles. Additionally, the protocol extends to the synthesis of asymmetric disulfides and allows for gram-scale synthesis.
研究领域:
催化
·
有机化学
·
纳米技术
✓ 已验证
DOI
高影响因子
Small
·
2021
·Vol. 17
·期 35
·2102224
·
IF 13.281
Yanfang Niu,Sen Li,Junning Zhang,Wang Wan,Zhenzhu He,Jun Liu,Keliang Liu,Sainan Ren,Liqin Ge,Xin Du,Zhongze Gu
Dynamic fluorescence patterns with variable output in response to external stimulus can make the current information storage technologies more flexible and intelligent. Yet it remains a great challenge to create such dynamic patterns because of the complicated synthesis process, high cost, limited stability, and biocompatibility of the functional fluorophores. Herein, a facile approach is presented for creating dynamic fluorescence patterns using the photodynamic surface chemistry based on disulfide bonds. By this method, high-resolution ( ≈ 20 µ m) multicolor dynamic fluorescence patterns that are low-cost and dynamically rewritable can be easily fabricated using classical fluorophores such as fluorescein, rhodamine, and dansyl acid. Owing to the spatio-temporal controllability of light, the fluorescence patterns can be partly or entirely erased/rewritten on demand, and complex gray-level fluorescence images with increased information capacity can be easily generated. The obtained fluorescence patterns exhibit little changes after storing in air and solvent environments for 100 days, demonstrating their high stability. In addition, static patterns can also be created on the same disulfide surface using irreversible disulfide–ene chemistry, to selectively control the dynamicity of the generated fluorescence patterns. The authors show the successful application of this strategy on information protection and transformation.
研究领域:
材料科学
·
化学
·
光学
·
信息技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Enci Wu,Jun Zhang,Mengdie Cai,Jia-qi Bai,Jiawei Xue,Yong Jiang,Jingshuai Chen,Chang-Jie Mao,Song Sun
Efficient transfer and maximal utilization of photogenerated electrons and holes in photocatalytic processes, along with the simultaneous production of hydrogen and high-value chemicals, represent a promising approach for effective solar energy utilization. Herein, polyaniline (PANI) was employed as a charge conductor to enhance the heterojunction structure between g-C 3 N 4 and CdS, thereby facilitating the efficient interfacial transfer of photogenerated carriers. The obtained composite has demonstrated outstanding photocatalytic performance in both water splitting for hydrogen production and the dehydrogenation coupling of thiols. The hydrogen evolution efficiency of g-C 3 N 4 -PANI-CdS composite in water splitting is 41.67 times higher than that of the original g-C 3 N 4 . Additionally, the sample exhibits efficient splitting and re-polymerization capabilities for 4-methoxythiophenol (4-MTP), achieving the efficient hydrogen production and bis (4-methoxyphenyl) disulfide (4-MPD) synthesis concurrently. Comprehensive characterization methods confirm that PANI acts as a highly conductive layer, accelerating rapid charge transfer and separation at the interface between g-C 3 N 4 and CdS, significantly improving the utilization of surface active sites. This study provides valuable insights for the future advancements in photocatalytic hydrogen generation and disulfides synthesis.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jinbiao Yang,Lidong Gao,Yuede Pan,Yeliang Jiao,Zhewei Yang,Gang Li,Kaiying Wang
Tin disulfide (SnS 2 ) is a promising anode material for sodium ion storage. In this study, we present a SnS 2 /4S composite with a molar ratio of 1:4 between SnS 2 and S, which was prepared through a simple melt-diffusion method, showing excellent sodium ion storage performance. The elemental sulfur in the composite provides additional capacity with its high specific capacity (1675 mAh g −1 ) and facilitates the interfacial charge transfer between the electrode and the electrolyte because soluble polysulfide anions can be formed during charge and discharge. Thus, the specific capacity of SnS 2 /4S has been maintained at 540.2 mAh g −1 after 150 cycles at a high current density of 5 A g −1 . In addition, the initial discharge capacity of the full cell SnS 2 /4S||Na 3 V 2 (PO 4 ) 3 is 555.1 mAh g −1 with a capacity retention of 95.7 % during 50 cycles. Our work provides a new composite engineering approach for the sodium ion storage study of SnS 2 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2016
·Vol. 9
·期 11
·3346-3354
·
IF 8.893
Yang Na,Tang Chun,Wang Kunyang,Du Gu,Asiri Abdullah M.,Sun Xuping
Developing efficient water-splitting electrocatalysts, particularly for the anodic oxygen evolution reaction (OER), is an important challenge in energy conversion technologies. In this study, we report the development of iron-doped nickel disulfide nanoarray on Ti mesh (Fe 0.1 -NiS 2 NA/Ti) via the sulfidation of its nickel–iron-layered double hydroxide precursor (NiFe-LDH NA/Ti). As a three-dimensional OER anode, Fe 0.1 -NiS 2 NA/Ti exhibits remarkable activity and stability in 1.0 M KOH, with the requirement of a low overpotential of 231 mV to achieve 100 mA·cm −2 . In addition, it exhibits excellent activity and durability in 30 wt.% KOH. Notably, this electrode is also efficient for the cathodic hydrogen evolution reaction under alkaline conditions.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Parasites & Vectors
·
2014
·Vol. 7
·期 1
·1-5
·
IF 3.251
Liu Xin Chao,Liu Qiyong,Zhou Ligang,Liu Zhi Long
Background During the screening programme for new agrochemicals from Chinese medicinal herbs and local wild plants, the essential oil of dried bulbs of Allium macrostemon Bunge (Liliaceae) was found to possess larvicidal activity against mosquitoes. The aim of this research was to determine the larvicidal activity of the essential oil and its major constituent compounds against the larvae of the Culicidae mosquito, Aedes albopictus.Methods Essential oil of A. macrostemon was obtained by hydrodistillation and analyzed by gas chromatography (GC) and gas chromaotography-mass spectrometry (GC-MS). The activity of the essential oil and its two major constituents were evaluated, using World Health Organization (WHO) procedures, against the fourth instar larvae of Ae. albopictus for 24 h and larval mortalities were recorded at various essential oil/compound concentrations ranging from 9.0 - 150 μg/ml.Results The essential oil of A. macrostemon exhibited larvicidal activity against the early fourth instar larvae of Ae. albopictus with an LC50 value of 72.86 μg/ml. The two constituent compounds, dimethyl trisulfide and methyl propyl disulfide possessed strong larvicidal activity against the early fourth instar larvae of Ae. albopictus with LC50 values of 36.36 μg/ml and 86.16 μg/ml, respectively.Conclusion The results indicated that the essential oil of A. macrostemon and its major constituents have good potential as a source for natural larvicides.
研究领域:
昆虫学
·
植物化学
·
公共卫生
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FLUORINE CHEMISTRY
·
2024
·
IF 1.7
Ye-lin Liu,Xiao-Yu Geng,Min Jiang,Jin-Tao Liu
The perfluoroalkylthiolation reactions of thiols with perfluoroalkanesulfenic acids were achieved without adding any additives, giving a series of unsymmetric disulfides in good to excellent yields. After simple removal of solvent from reaction system under reduced pressure, most products could be obtained with high purity. The reaction tolerates both aryl and alkyl thiols and has advantages such as easy-to-handle, additive-free and simple separation procedure.
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Qing Zhang,Cui Ye,Xiao Lin Li,Yang Hui Deng,Bai Xiang Tao,Wei Xiao,Ling Jie Li,Nian Bing Li,Hong Qun Luo
Electrochemical splitting of water has been viewed as a highly efficient technique to produce clean hydrogen and oxygen energy. However, designing inexpensive multifunctional electrocatalysts with high performance is a great challenge. Here, a unique three-dimensional catalyst of self-interconnected porous Ni–Co disulfide networks grown on carbon cloth [(Ni0.33Co0.67)S2 nanowires (NWs)/CC] was prepared by a facile hydrothermal method coupled with further low-temperature sulfuration strategy. As a bifunctional electrocatalyst, (Ni0.33Co0.67)S2 NWs/CC exhibits a remarkable activity to catalyze both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). To drive a current density of 100 mA cm–2, (Ni0.33Co0.67)S2 NWs/CC needs the overpotentials of 156 mV in 0.5 M H2SO4 solution and 334 mV in 1.0 M KOH solution for HER, respectively. Moreover, when used as a catalyst of OER, (Ni0.33Co0.67)S2 NWs/CC needs an overpotential of 295 mV to produce a current density of 100 mA cm–2. The excellent electrochemical properties are mainly attributed to the synergetic catalysis of a Ni–Co-based bimetallic disulfide, the porous network structure, and the high conduction of CC. Moreover, the two-electrode alkaline water-splitting system constructed by (Ni0.33Co0.67)S2 NWs/CC only needs a low cell voltage of 1.57 V to approach 10 mA cm–2. This work offers more new insights for the design and preparation of the non-noble metal catalysts based on transition metal sulfides with excellent electrocatalytic performance in overall water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2022
·Vol. 11
·期 3
·2202087
·
IF 10.05
Zhe Liu,Xiyu Jia,Weishuai Duan,Xinfa Zhu,Biao He,Chun Sun,Mengjun Wang,Erping Li,Chao Fan
Tin disulfide (SnS 2 ) is an emerging 2D-layered metal dichalcogenide with promising application potential for highly sensitive and fast-response-speed photodetectors. However, SnS 2 -based photodetectors still have drawbacks that limit their practical and commercial applications. Herein, an effective route is proposed for constructing SnS 2 /indium-doped SnS 2 homostructures to improve photodetector performance. Vertical SnS 2 /Sn 0.991 In 0.009 S 2 homostructures and photodetectors based on these homostructures were fabricated via a polydimethylsiloxane-assisted dry-transfer method. The photodetectors exhibit excellent performance, including a high photoresponsivity of up to 271.7 A W −1 , high normalized detectivity of up to 2.13 × 10 12 cm Hz 1/2 W −1 , and fast response time of ≈10 ms. The pseudo-built-in electrical field of the SnS 2 /Sn 0.991 In 0.009 S 2 homostructure results in the superior performance of the photodetectors based on this material compared to that based on individual SnS 2 and Sn 0.991 In 0.009 S 2 thin layers, most 2D materials, and commercial photodetectors (e.g., THORLABS FD11A Si, and FGA01 InGaAs). This study provides a facile and effective approach to enhance the performance of SnS 2 -based photodetectors and paves the way for future applications of photodetectors based on SnS 2 and other 2D materials.
研究领域:
材料科学
·
光电探测器技术
✓ 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）