TALANTA
·
2014
·
IF 3.511
Shan Zhang,Tao Yu,Mingtai Sun,Huan Yu,Zhongping Zhang,Suhua Wang,Hui Jiang
A fluorescent probe was synthesized and demonstrated to be highly selective and sensitive in the reaction with copper (II) ion, generating a large variation of the fluorescence intensity in a dose–response manner. The probe contains a dansyl moiety as fluorophore and a multidentate ligand for copper (II) ion recognition. The reaction of the molecular probe with copper (II) ion proceeds rapidly and irreversibly in a 1 to 1 stoichiometric way, leading to the production of stable copper (II) complex, which subsequently results in the quenching of fluorescence. The detection limit for copper (II) ion was measured to be about 2 ppb. It was also shown that the probe has high selectivity for copper (II) ion and good anti-interference ability against other transition metal ions . The herein reported very simple and reliable fluorescence probe could be employed for copper (II) ion detection in many aspects.
研究领域:
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2014
·Vol. 97
·期 9
·2897-2902
·
IF 2.428
Tianshuai Lv,Xuhui Xu,Xue Yu,Hongling Yu,Dacheng Zhou,Jianbei Qiu
A series of copper species, Tb 3+ , Mn 2+ single- and co-doped oxyfluoride glasses were synthesized by a melt-quenching method. The photoluminescence properties of the glasses containing copper species were demonstrated. Results indicate that the blue-green emission band peaking at 440 nm was observed, which was ascribed to the photoluminescence of Cu + ions rather than the emissions of Cu 2+ cations or Cu nano-particles (Cu NPs) induced by local field effect (LFE) enhancement through surface plasmon resonance (SPR). The interaction mechanisms between Cu + and Tb 3+ /Mn 2+ have been systematically investigated, and significant enhancement of Cu + emission and the energy-transfer (ET) efficiencies of Cu + →Tb 3+ and Cu + →Mn 2+ were observed in glasses doped with SnO reducing agent. Furthermore, a wide-range-tunable emission and ideal white-light fluorescence were realized in Cu + /Tb 3+ /Mn 2+ -coactivated glasses by utilization of Cu + cations as dual ET contributors from deep-UV-source to multiactivators. Our research further extends the understanding of the interactions between Cu + and Tb 3+ /Mn 2+ in amorphous materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Deqiang Chen,Xiang Liu,Huali Nie
A novel, three-dimensional (3D), self-supporting material—the crumpled graphene ball—was developed using an aerosol capillary approach. The resultant crumpled-graphene-ball architecture showed a self-supporting, 3D network microstructure with plenty of ridges and wrinkles. Due to their unique structural characteristics, the 3D balls exhibited a rapid adsorption rate and superior adsorption capacity toward the copper ion (Cu 2+ ). It was noted that the adsorption capacity for Cu 2+ reached about 224.56 mg/g within 2 min. A high adsorption capacity, fast adsorption kinetics , excellent regeneration and reusability characteristics, and the ease of materials processing make these crumpled graphene balls ideal candidates for heavy metal ion decontamination in practical application.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Yong Feng,Po-Heng Lee,Deli Wu,Zhengyuan Zhou,Hangkong Li,Kaimin Shih
Copper ions (Cu 2+ and Cu + ) have shown potential as Fenton-like activators for the circumneutral removal of organic contaminants from aqueous solutions. However, the major active species (cupryl species (Cu 3+ ) versus hydroxyl radical ( OH)) produced during the activation of hydrogen peroxide by Cu + remain unclear. In this study, Cu + -O 2 oxidation, in which hydrogen peroxide is produced via the activated decomposition of dissolved molecular oxygen, was used to degrade sulfadiazine, methylene blue, and benzoic acid. The results showed that both sulfadiazine and methylene blue could be efficiently degraded by Cu + -O 2 oxidation in a wide effective pH range from 2.0 to 10.0. Quenching experiments with different alcohols and the effect of Br − suggested that Cu 3+ rather than OH was the major active species. Electron paramagnetic resonance detected 5,5-dimethyl-2-hydroxypyrrolidine-N-oxyl (DMPO-OH), which was probably produced by the oxidation of DMPO by Cu 3+ or OH formed as a product of Cu 3+ decomposition. 4-hydroxybenzoic acid was produced during the degradation of benzoic acid by Cu 3+ . The findings of this study may help to explain the inconsistency regarding the dominant active species produced by the interaction of Cu + and hydrogen peroxide.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Shiyu Xu,Ying Wang,Ying Sun,Guiye Shan,Yanwei Chen,Yichun Liu
The cysteine (CYS)-stimulated aggregation of Au nanorods (NRs) is used as an auxiliary reporting system for the optical detection of copper ions. CYS-Au NRs show end-to-end and side-by-side assembly at strong acidic and basic condition, and corresponding LSPR peaks shift to red or blue. However, Cu 2+ can readily induce the end-to-end assembly of CYS-Au NRs based on the coordination between Cu 2+ and CYS at weak acidic condition (pH 5). The assembly of Cu 2+ -CYS-Au make the decrease of LSPR peak at 800 nm and appear a new peak at 1050 nm, which reduce their photothermal conversion efficiency under 808 nm laser irradiation. The different photothermal conversion efficiency has relation with the temperature change of Au NRs solution. So, a new nanosensor for detecting Cu 2+ is developed based on the varied photothermal effect. Different from colorimetric detection for Cu 2+ , the sensor of photothermal effect is more sensitive to low concentration of Cu 2+ . It shows high sensitivity and selectivity. Here, the detection limit for Cu 2+ is 5 nM.
研究领域:
分析化学
·
纳米生物学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Qin Tan,Xuanxuan An,Shuang Pan,Shujun Zhen,Yongmei Hu,Xiaoli Hu
Clioquinol (CQ) is not only used to treat skin diseases, but also CQ is a potential pharmaceutical for the treatment of neurodegenerative diseases. However, only a few researches report the detection of CQ. Thus, it is of great significance to accurately quantify CQ. Herein, we developed a CQ fluorescent sensor by Cu 2+ and carbon dots (CDs). Cu 2+ adsorbed on the surface of CDs preventing the non-radiative recombination of the holes in the valence band and the excited electrons in the CDs conduction band , which brings about an increase in the fluorescence intensity of CDs. However, a complex is formed owing to the strong affinity with Cu 2+ and CQ causing that Cu 2+ is disrobed from the CDs surface and then it quenched the fluorescence of CDs through inner filter effect (IFE). The CDs + Cu 2+ system displays preferable sensitivity and high selectivity toward CQ in a range of 40.0–400.0 μmol L −1 with a detection limit of 4.7 μmol L −1 . In addition, the strategy is employed for the quantification of CQ in clioquinol cream with satisfactory results.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Wenjun Zhou,Qiang Gao,Darui Liu,Chen Li,Shu Liu,Kaisheng Xia,Bo Han,Chenggang Zhou
A novel salicylaldehyde bis-Schiff-base probe decorated with imidazolium ionic liquid moieties at both ends (SAS-IMIs) was designed and facilely synthesized as a colorimetric/ratiometric sensor to visually detect Cu 2+ and Pd 2+ in pure aqueous media. Due to the positively charged characters of its head and tail, the SAS-IMIs exhibited high water solubility with a potential advantage in minimizing the self-aggregation. More importantly, simply by varying the solution pH, colorimetric/ratiometric sensing detection of individual metal ion (Cu 2+ or Pd 2+ ) was realized without any mutual interference. Subsequently, sensitive, selective, and differential detections for Cu 2+ (LOD: 0.080 μM) and Pd 2+ (LOD: 0.076 μM) in 100% aqueous solutions were achieved, which proved to be applicable for real water samples. Results from density functional theory (DFT) calculations unveiled the Cu 2+ /Pd 2+ -binding properties of SAS-IMIs, which were in accordance with the experimental observations. Furthermore, a SAS-IMIs-based solid phase sensor was fabricated, which manifested satisfactory detection abilities for Cu 2+ and Pd 2+ .
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2022
·
IF 18.027
Gong Zhang,Yaoyu Liang,Yuefei Wang,Qing Li,Wei Qi,Wei Zhang,Rongxin Su,Zhimin He
Chiral regulation to prepare functional materials has aroused considerable interest in recent years. However, little is known on the effect of chirality of ligands in the metal–organic coordination assembly process. We report the self-assembly of diphenylalanine peptide (Phe-Phe, FF), the core fragment of Aβ protein, with metal copper ion (Cu2+) into metal–organic assemblies with chirality-encoded structures and properties. The chirality-dependent metal–dipeptide assembles with different morphologies and supramolecular chirality were obtained by facile changing of the FF chirality. Single-crystal results indicate that (L)-FF coordinated with Cu2+ into a cross-chain structure with a five-coordinated style, while the racemates of (L+D)-FF with Cu2+ crystallized into an (L)-Cu2+-(D)-Cu2+ alternated four-coordinating structure, enabling a higher mechanical and catalytic performance. The Young’s modulus of (L+D)-FF-Cu is as high as 34.36 GPa, which is 2.45 times higher than that of (L)-FF-Cu. Furthermore, both of them follow the characteristic enzyme kinetics and show higher catalytic activity than natural laccase at the same mass concentration. Specifically, the calculated catalytic efficiency (kcat/KM) of (L+D)-FF-Cu is 1.14 times higher than that of (L)-FF-Cu, and the (L+D)-FF-Cu shows significantly enhanced stability and reusability compared with (L)-FF-Cu. The results reveal that highly functional materials could be constructed by encoding the chirality of molecular building blocks.
研究领域:
材料科学
·
生物化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Haoran Song,Shiting Pan,Yuwei Wang,Yang Cai,Wei Zhang,Yongming Shen,Changping Li
There exists an obvious contradiction between Cu(III) generation and Cu(I) contribution in reductants enhanced Cu(II)/peroxymonosulfate (PMS) process because the involved electron transfer pathways were always ignored in previous studies. This study investigated the MXene-mediated electron transfer mechanism in Cu(II)/PMS for the first time. The introduction of MXene significantly promoted atrazine degradation under acidic condition because the in-situ generation of Cu(I) was an excellent activator for PMS. Under alkaline condition, although addition of MXene generated a large amount of Cu(I), the degradation of atrazine was inhibited due to that the conversion of Cu(I) to Cu(III) was interrupted. The strong metal-support interaction (SMSI) altered the reactive intermediate species from Cu(III) (two-electron transfer) to hydroxyl radical (HO • ) and sulfate radical (SO 4 •- ) (one-electron transfer) under alkaline condition. This work proposed a novel MXene-mediated electron transfer mechanism and improved the understanding of Cu(III)/Cu(I) transformation pathway.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Nutrition
·
2022
·
IF 6.59
Leng Xin,She Mengyao,Jin Xilang,Chen Jiao,Ma Xuehao,Chen Fulin,Li Jianli,Yang Bingqin
Copper is a vital trace metal in human body, which plays the significant roles in amounts of physiological and pathological processes. The application of copper-selective probe has attracted great interests from environmental tests to life process research, yet a few of sensitive Cu2+ tests based on on-site analysis have been reported. In this paper, a novel fluorescein-based fluorescent probe N4 was designed, synthesized, and characterized, which exhibited high selectivity and sensitivity to Cu2+ comparing with other metal ions in ethanol–water (1/1, v/v) solution. The probe N4 bonded with Cu2+ to facilitate the ring-opening, and an obvious new band at 525 nm in the fluorescence spectroscopy appeared, which could be used for naked-eye detection of Cu2+ within a broad pH range of 6–9. Meanwhile, a good linearity between the fluorescence intensity and the concentrations of Cu2+ ranged 0.1–1.5 eq. was observed, and the limit of detection of N4 to Cu2+ was calculated to be as low as 1.20 μm. In addition, the interaction mode between N4 and Cu2+ was found to be 1:1 by the Job's plot and mass experiment. Biological experiments showed that the probe N4 exhibited low biological toxicity and could be applied for Cu2+ imaging in living cells. The significant color shift associated with the production of the N4-Cu2+ complex at low micromolar concentrations under UV light endows N4 with a promising probe for field testing of trace Cu2+ ions.
研究领域:
分析化学
·
生物医学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Jing Ying Yang,Wen Ying Gao,Jian Hua Wang,Zhen Ming Dong,Yu Wang,Shao Min Shuang
Herein we present a new colorimetric and fluorescent probe , AH, derived from the Schiff base condensation between 4-(2-aminophenylimino)-7-nitrobenzofurazan and 2-hydroxy-1-naphthaldehyde for optical sensing of Cu 2+ ions. In aqueous CH 3 CN solution (CH 3 CN/H 2 O, 1:1, v/v , pH7.4), AH effectively complexed with Cu 2+ at a stoichiometric ratio of 1:1, producing nearly 25-fold fluorescence enhancement at 540 nm along with a significant color change from orange to grey blue. The sensing system exhibits high specificity for the detection of Cu 2+ . The detection limit is as low as 42.2 nM. The observed switching on fluorescence emission can be attributed to the suppression of photo-induced electron transfer (PET) as well as chelation enhanced fluorescence (CHEF) effect after coordination of AH with Cu 2+ ion via the unshared electron pair on the phenyl amine. A test strip with AH has been fabricated for identifying Cu 2+ . Fluorescence imaging study reveals that probe AH is capable to sense Cu 2+ in living HeLa cells, Malpighian tubules of locust and zebrafish.
研究领域:
分析化学
·
生物医学
·
光学传感
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Hui Li,Tiantian Xu,Zhe Zhang,Jiao Chen,Mengyao She,Yali Ji,Boyue Zheng,Zheng Yang,Shengyong Zhang,Jianli Li
The ability to manipulate carbon quantum dots (CQDs) fluorescence with specific substances has been of primary importance for applications in advanced dynamic information encryption. The development of CQDs with specific functionalization, high selectivity and excellent fluorescence stability for information security and sensing remains a challenge. In this paper, we present an N -doped and tryptophan functionalized CQDs that can be applied not only as a fluorescent ink for multiple message encryption but also for fluorescent sensitive and selective recognition of Cu 2+ and cysteine (Cys) by multi-method, including aqueous solutions, filter paper, hydrogels and in human DU-145 Prostate cancer cells. Theoretical calculations and mechanistic studies suggested that this on–off-on mechanism was attributed to the transfer of electrons between Cu 2+ and functionalized groups on the surface of CQDs and stronger coordination capability with Cys. The above results showed that these newly designed CQDs will greatly enrich the fundamental understanding of CQDs by explaining the recognition mechanism between Cu 2+ and Cys, and provide an opportunity for anti-counterfeiting, solid-state fluorescent materials, cellular imaging and environmental.
研究领域:
材料科学
·
生物传感
·
化学
✓ 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）