Analytical Methods
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2012
·Vol. 4
·期 12
·3981-3986
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IF 1.547
Haichao Su,Bing Sun,Lijian Chen,Zhenning Xu,Shiyun Ai
A facile, economic and eco-friendly colorimetric detection method for dopamine has been well-established in this paper. It is based on the interaction between Cu2+ ions with amino group and hydroxyl groups of the dopamine adsorbed on the surface of gold nanoparticles (GNPs). Cu2+ ions serve as the selective “discriminator and linker” for dopamine detection. At high ionic strength, introduction of Cu2+ ions to GNPs solution including dopamine arouses the aggregation of GNPs, the color of the solution changes from wine red to blue, and the red shift of ultraviolet absorption peaks. The concentration of dopamine can be determined by monitoring with the naked eye or a UV-vis spectrometer. The calibration curve showed that the absorption ratio value at 650 and 525 nm (A650/A525) increased linearly over the dopamine concentration range of 5 × 10−7 M to 1 × 10−5 M with a limit of detection of 2 × 10−7 M (3σ). This method exhibits excellent selectivity for dopamine over other α-amino acids, glutathione, glucose, uric acid and ascorbic acid, and the process of the experiment, including the preparation of GNPs, detection of dopamine, pretreatment of sample, is finished within 30 min at room temperature. On the other hand, this probe was successfully applied to detect dopamine in human serum with high sensitivity, and this strategy may provide a selective sensing approach for measuring dopamine under physiological conditions.
研究领域:
分析化学
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生物医学工程
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纳米技术
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DOI
高影响因子
RSC Advances
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2015
·Vol. 5
·期 112
·92762-92768
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IF 3.84
Daquan Wang,Ying Hu,Lingjie Meng,Xiaochi Wang,Qinghua Lu
Highly cross-linked and monodisperse polyphosphazene (PZS) nanoparticles exhibiting strong fluorescence were prepared by the facile one-pot polycondensation of hexachlorocyclotriphosphazene and 4′,5′-dibromofluorescein (DBF). Fluorescent DBF units were ‘immobilized’ and ‘isolated’ in the cross-linked structures to effectively overcome their concentration-quenching effect and improve their photobleaching properties. The resulting DBF–PZS nanoparticles emitted bright yellow fluorescence at all concentrations and exhibited excellent resistance to photobleaching as well as interference from bio-molecules such as proteins, ascorbic acid and uric acid. Intriguingly, the fluorescence of the DBF–PZS nanoparticles was linearly quenched by DA in the range of 0.5 to 15 μg mL−1 DA concentration via photoinduced charge transfer. Therefore, the use of DBF–PZS nanoparticles represents a simple but effective, highly sensitive and selective detection method with a direct read out for DA in biological fluids.
研究领域:
材料科学
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分析化学
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生物医学
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DOI
高影响因子
INTEGRATED FERROELECTRICS
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2016
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IF 0.375
Dong-Wei Han,Xiu-Lan Zhang,Bing Yu,Hai-Lin Cong,Chun-Bo Mu,Hua Yuan
Three kinds of carboxyfullerenes, La@C82-COOH, C60-COOH and C70-COOH, were used to modify gold electrodes. The electrochemical behavior of dopamine (DA) at the carboxyfullerenes modified electrodes was studied using the cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. The C70-COOH modified electrodes performed the best among them. Under the optimal conditions, linear CV and DPV responses to DA concentration from 1 μmol/L to 13 μmol/L were observed, and the detection limit of DA was 1×10−2 μmol/L in the presence of 10 μmol/L uric acid (UA). The practical analytical utilities of the C70-COOH modified electrodes were demonstrated by the determination of DA HCl in the real samples of dopamine hydrochloride injection (DHI). Moreover, the modified electrodes exhibited good reproducibility and sensitivity, demonstrating its feasibility for analytical purpose.
研究领域:
分析化学
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神经科学
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药物分析
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Yu-Hui Jiang,Yu-Qing Zhang,Zhan-Hua Wang,Qing-Da An,Zuo-Yi Xiao,Ling-Ping Xiao,Shang-Ru Zhai
Superhydrophobic oil-water separation substrates with low cost, high quality and highly efficient performance are desirable in practical fields; however, utilizing the synergistic chemistry of intrinsic molecular characters of lignin (HTL) and dopamine (DA) was rarely reported, even both of which extensively studied for fabricating varied functional materials. Here, inspired by mussel chemistry, superhydrophobic melamine foam (MF) composites with stable micro-islands projections were constructed (HTL@MF-SC) by free radical addition of dopamine (DA) and hydrothermal extraction of β-O-4 bond-rich lignin (HTL) as a primer and installation of an auxiliary coating silicon coating (SC). In a certain area, MF formed porous network channels supplying space for oil absorption, while the slender MF fiber acted as a "temporary antenna" to adsorb the wee oil droplets in oily wastewater, ensuring efficient oil/water separation for oil/water mixture (98% after 10 cycles) and achieving strong adsorption capacity (57.48–147.33 g/g). Several technology-model-supported experiments presented that the HTL@MF-SC-based superhydrophobic material with micro-island projections maintained greatly mechanical stability and apparent contact angle considerable to withstand 10 friction and tape stripping cycles. Even being treated by different pH environments, as-designed superhydrophobic surface still maintained a water contact angle beyond 150°, favorably confirming its acid and alkali resistance under testing conditions.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Hao Guo,Bingqing Liu,Zhilan Pan,Lei Sun,Liping Peng,Yuan Chen,Ning Wu,Mingyue Wang,Wu Yang
s Covalent organic frameworks (COFs) have received tremendous interest due to their structural diversity and versatility. These unique physicochemical properties make them exhibit great application potential in the field of electrochemical sensor. In this study, an imine bond-linked COF with porosity and large specific surface area was fabricated by a dehydration condensation reaction between 1, 3, 5-tris(4-formylphenyl)benzene (TFPB) and 1, 3, 5-tris(4-aminophenyl) benzene (TAPB) and combined with high electrical conductivity of oxidized multi-walled carbon nanotube (Ox-MWCNT). The structure of the COF and the resulted composite material were confirmed through a series of characterization techniques, including Fourier-transform infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy and thermogravimetric analysis , then a co-modified glassy carbon electrode was constructed for simple, sensitive and selective electrochemical recognition of dopamine (DA) and uric acid (UA). The fabricated electrochemical sensor displayed a strong current response to both DA and UA in the phosphate buffer solution (PBS) at pH = 6.5. The synergistic effect between COFs and Ox-MWCNT effectively improved the analytical sensitivity for the target analytes. Under optimized experimental conditions, the method showed good performance for DA and UA in the concentration range of 0.6–250.0 μM with low detection limits of 0.073 μM and 0.063 μM (S/N = 3), respectively. Moreover, the proposed sensor exhibited high selectivity , longtime stability, desirable repeatability and acceptable reproducibility and can be used to analyze simultaneously DA and UA in biological and medicine samples with satisfactory results. Our work not only provides a simple way to detect DA and UA quantitatively in real samples, but also offers a new platform for COF-based composite application in electrochemical sensing .
研究领域:
分析化学
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材料科学
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DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Shao-zhong Hu,Yu-fan Deng,Liang Li,Nan Zhang,Ting Huang,Yan-zhou Lei,Yong Wang
The rapid growth of industrialization has resulted in the release of large quantities of pollutants into the environment, especially dyes and heavy metals, which are environmentally hazardous for humans and animals. It is considered as the most promising and environmentally friendly route to develop green materials by using the green modification method, which has no negative impact on the environment. In this work, the green material of polylactic acid (PLA) was used as the substrate material, and a novel modification method of polydopamine (PDA)-assisted polyethyleneimine (PEI) grafting was developed. The electrospun PLA fibers are mainly composed of stereocomplex crystallites, which were achieved via the electrospinning of poly(l-lactic acid) and poly(d-lactic acid). The water-soluble PEI was grafted onto the PDA-modified PLA fibers through the glutaraldehyde-assisted cross-linking reaction. The prepared composite fibers can be degraded, which is environmentally friendly and meets the requirements of sustainable development. The potential application of such PLA composite fibers in wastewater treatment was intensively evaluated. The results show that at appropriate fabrication conditions (PDA concentration of 3 g·L–1 and a PEI molecular weight of 70,000 g·mol–1), the composite fibers exhibit the maximum adsorption capacities of 612 and 398.41 mg·g–1 for methyl orange (MO) and hexavalent chromium [Cr(VI)], respectively. Simultaneously, about 64.79% of Cr(VI) adsorbed on the composite fibers was reduced to Cr(III). The above results show that the PLA composite fibers have a good development prospect in the field of wastewater treatment.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2023
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IF 5.2
Mingwei Zhang,Linlin Liu,Wenjun Zhang,Li Wang,Xiangwen Zhang,Guozhu Li
ZSM-48 is widely used to support Pt nanoparticles (Pt/ZSM-48) for hydroisomerization of long-chain n -paraffin due to its 10-member-ring one-dimensional pore structure . But the yield of target isomers on Pt/ZSM-48 is difficult to be improved due to easily bundled crystal bars and relatively excessive acid sites of ZSM-48, which restricts reactant diffusion and causes cracking. In this study, different types of zeolite growth modifiers (ZGMs) are screened for regulating the physicochemical property of ZSM-48, in which phenolic hydroxyl was found to be the most effective functional group. Quantitative correlations between ZGM structure and the properties of corresponding ZSM-48 crystal are achieved based on appropriate descriptors and multi-parameter regression. Then, the mechanism of ZSM-48 regulation by phenolic ZGMs is revealed. The models predict that polydopamine (PDA) is a superior ZGM for hydroisomerization, which is verified by textural characterization and reaction evaluation. Compared with the conventional catalyst, the isomer selectivity was improved effectively from 92% to over 97% when the feed conversion was lower than 80%, and the maximum yield of isomers was 89.0% as catalyzed by the PDA-regulated catalyst. The as-built models can also be used to design preferred phenolic ZGMs for preparing tailored ZSM-48 in other applications.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Shang-yu Chen,Yu-fan Deng,Ting Huang,Nan Zhang,Yong Wang
As an eco-friendly material, the wide application of polylactide (PLA) in wastewater treatment is favorable for eliminating the possible second-pollution induced by the common membrane materials. However, the application of PLA is also greatly restricted by the hydrophobicity and inert surface of PLA-based materials. In this work, the electrospun PLA fiber film with stereocomplex crystallites (SC-PLA) was prepared through electrospinning, then the successive decorations of self-polymerization of polydopamine (PDA) and PDA-assisted MXene deposition were carried out. The physicochemical performances such as wettability, mechanical properties, and photothermal conversion ability were intensively researched. Then, the oil/water separation ability and the organic pollutants removal effect of the composite membranes were systematically researched. The results show that the composite membrane is amphiphilic, which results in the membrane exhibiting high fluxes and excellent oil/water separation performance in the separation process of different types of emulsions, and oil/water separation efficiency can be further enhanced under light irradiation. Specifically, the maximum adsorption capacity of the composite membrane for methylene blue (MB) reached 434.8 mg/g, and the composite membrane can also simultaneously remove oil and MB from the emulsified solution in the one-time separation process. This work demonstrates that the PLA-based composite membranes have potential application in sewage purification and can be the alternative for the next generation membrane separation material.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Jiawei Zhou,Yuee Zhong,Yu Xie,Jiao Yu,Xiaohua Zhu,Shu Huang,Meiling Liu,Xiaoying Liu,Youyu Zhang
Photoelectrochemical (PEC)-based dual-mode sensing and photocurrent polarity switchable PEC are highly promising analytical strategies for increasing sensitivity and accuracy. However, the construction of a sensing platform integrating both mechanisms faces challenges. Herein, a novel PEC-fluorescence (FL) dual-mode triple-signal sensing platform is proposed for dopamine (DA) detection based on the polydopamine (PDA) and phosphate-induced FL quenching and photocurrent polarity reversal dual mechanism. Silver sulfide quantum dots (Ag 2 S QDs), acting as both FL probe and PEC enhancer for the SnO 2 and sulfur-doped BiOCl (SnO 2 /SBOC). In the presence of DA, PDA forms and adheres onto the surface of Ag 2 S QDs in alkaline conditions, effectively quenching the FL of Ag 2 S QDs. The resulting PDA@Ag 2 S droplets on the SnO 2 /SBOC and creates a multi-heterojunction structure that significantly enhances the PEC response. PO 4 3− facilitates the substitution of sulfur and chlorine atoms in the SBOC, creating a shielding effect that impedes electron conduction and induces photocurrent polarity reversal of the sensing platform. The detection of DA is achieved with an ultralow detection limit of 1.2 × 10 −8 M and wide linear detection range of 0.20–225 μM. The designed dual-mode, three-signal sensing strategy greatly improves the sensitivity and reliability, enabling self-calibration of the detection results. PDA and phosphate-induced polarity conversion presents a pioneering perspective for advanced biosensing, highlighting its potential for future applications.
研究领域:
生物分析化学
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分子诊断学
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纳米生物技术
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光电化学传感
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转化医学
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神经递质检测
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生物传感器
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANIMAL ECOLOGY
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2024
·Vol. 94
·期 1
·112-124
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IF 3.5
Gaoying Gu,Ziqi Wang,Tao Lin,Sainan Wang,Jianjun Li,Shihao Dong,James C. Nieh,Ken Tan
en This link goes to a English section zh This link goes to a Chinese section Predatory threats, even when they do not involve direct consumption (non-consumptive effects, NCEs), can profoundly influence the physiology and behaviour of prey. For example, honeybees that encounter hornet predators show responses similar to fear. However, the physiological mechanisms that are connected with this fear-like response and their effects on bee cognition and olfaction remain largely unknown. We show that bees decreased time spent near the hornet, demonstrated fearful behaviour and moved with greater velocity to escape. After a prolonged 24-h exposure, bees adopted defensive clustering, displayed greater predator avoidance, and experienced a decline in brain dopamine levels. Prolonged predator exposure also diminished bee olfactory sensitivity to odours and their mechanical sensitivity to air currents, contributing to impaired olfactory learning. However, boosting brain dopamine reversed one fear-like behaviour (average bee velocity in the presence of a hornet) and rescued olfactory sensitivity and learning. We therefore provide evidence linking dopamine to sensory and cognitive declines associated with fear in an insect. 摘要 en This link goes to a English section zh This link goes to a Chinese section 即便对猎物不构成直接捕杀(非消耗性捕食效应)，捕食者也可以对猎物的生理和行为造成严重的影响。例如，遭遇胡蜂捕食者时，蜜蜂会产生类似恐惧的反应。 然而，该类似恐惧反应相关的生理机制还没有详细研究，该类似恐惧反应对蜜蜂的认知嗅觉的影响也没有报道。 我们的实验结果表明，蜜蜂在遭遇胡蜂时表现出惧怕行为，表现为减少了在胡蜂附近的停留时间，并以更快的速度逃离。但在24小时的胡蜂胁迫后，蜜蜂表现出防御性集群行为，大脑多巴胺水平下降。长时间的捕食者暴露还降低了蜜蜂对气味的嗅觉敏感度以及气流的机械敏感性，导致嗅觉联想学习能力受损。 然而，人为提高蜜蜂大脑多巴胺水平缓解了它们对胡蜂的恐惧，并在一定程度上恢复了蜜蜂的嗅觉敏感度和学习能力。 因此，我们的研究表明多巴胺参与昆虫恐惧行为的调控，与嗅觉和认知下降密切相关。
研究领域:
昆虫学
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神经生物学
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行为生态学
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DOI
高影响因子
Surfaces and Interfaces
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2024
·
IF 5.7
Xiaojia Zhao,Junjie Fu,Fangqian Yin,Chaoqun Li,Yuyang Xu,Guirong Peng
A one-step co-deposition method based on dopamine and hydrophilic hydroxyethyl methacrylate (HEMA) was proposed for the modification of polyvinylidene fluoride (PVDF) membrane, which could ameliorate its oil-water separation performances and hydrophilicity. A range of modified membranes were prepared by adding different content of HEMA in the reaction solution. For the improved membrane, the minimum water contact angle can reach 13.63°, and the maximum underwater oil contact angle can reach about 150°. The pure water flux for the improved membrane reaches 9668 L·m -2 ·h -1 ·bar -1 , showing excellent hydrophilicity. In addition, the separation efficiency of the improved membrane for a variety of oil-water emulsions exceeds 98%, indicating good permeability and circulating oil resistance. At the same time, this approach is also applicable to other membranes on account of the extensive availability of dopamine.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
MOLECULES
·
2021
·Vol. 26
·期 9
·2738
·
IF 4.412
Xiang Lai,Yu Han,Jie Zhang,Jinyu Zhang,Weifeng Lin,Zhiwei Liu,Longgang Wang
The sensitive and selective detection of dopamine (DA) is very important for the early diagnosis of DA-related diseases. In this study, we reported the colorimetric detection of DA usingGanoderma lucidumpolysaccharide (GLP) stabilized platinum nanoclusters (Ptn-GLP NCs). When Pt600-GLP NCs was added, 3,3’,5,5’-tetramethylbenzidine (TMB) was rapidly catalyzed and oxidized to blue oxTMB, indicating the peroxidase-like activity of Pt600-GLP NCs. The catalytic reaction on the substrate TMB followed the Michaelis-Menton kinetics with the ping-pong mechanism. The mechanism of the colorimetric reaction was mainly due to the formation of hydroxyl radical (•OH). Furthermore, the catalytic reaction of Pt600-GLP NCs was used in the colorimetric detection of DA. The linear range for DA was 1–100 μM and the detection limit was 0.66 μM. The sensitive detection of DA using Pt-GLP NCs with peroxidase-like activity offers a simple and practical method that may have great potential applications in the biotechnology field.Keywords:dopamine;detection;platinum;colorimetric;Ganoderma lucidumpolysaccharide
研究领域:
生物技术
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医学诊断
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）