PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2017
·Vol. 19
·期 35
·23898-23904
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IF 4.123
Congdi Shang,Li Wang,Yanqin An,Ping Chen,Xingmao Chang,Yanyu Qi,Rui Kang,Yu Fang
Fast, sensitive and selective detection of diamines in the vapor phase is of pivotal importance for air and food quality monitoring. In this work, an electron-poor fluorophore, perylene bisimide (PBI), was modified with hydrophilic residues at its bay positions, resulting in an amphiphilic derivative, PEBBO. Photophysical studies revealed that the compound shows a strong aggregation tendency in various solvents, but the aggregates could be highly fluorescent provided suitable solvents are used. Accordingly, a fluorescent film was constructed via utilization of the well-known Langmuir–Blodgett technique. Sensing performance studies revealed that the film as prepared is sensitive and selective to the presence of diamines in air. Specifically, (1) the experimental detection limit is lower than 0.016 g m−3 and the linear range of the analysis extends from 0.33 g m−3 to 8.20 g m−3 when ethylenediamine was adopted as an example analyte; (2) the presence of other amines and solvents shows little effect upon detection; (3) the response time is less than 5 s. Considering the importance of diamine sensing, the convenience of fluorescence techniques and the superiorities of the film and method as developed, it is believed that the present work is of great importance for promoting technical progress in diamine sensing.
研究领域:
化学
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环境科学
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材料科学
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DOI
PubMed
高影响因子
ANALYST
·
2011
·Vol. 137
·期 4
·953-958
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IF 3.913
Li Jiao Liang,Xi Juan Zhao,Cheng Zhi Huang
Pyrophosphate ion (PPi) is crucial in varieties of biological processes and industrial applications, and thus it is very important how to recognize it with high selectivity. In this contribution, one terpyridine (tpy)-based fluorescent molecule, 4-(methylphenyl)-2,2′:6′,2′′-terpyridine (mptpy), has been reported to display a highly selective recognition for PPi in the presence of Zn(II). After exposure toward the Zn(II) ion, the characteristic emission of mptpy at 376 nm red-shifted to 406 nm with a strong enhancement upon an excitation at 280 nm, and then blue-shifted to 388 nm with the further addition of PPi. Absorption and fluorescence measurements showed that other phosphates including phosphate (Pi) as well as nucleotide triphosphates could not induce the spectral changes similar to PPi, demonstrating the unique binding effect between mptpy-Zn(II) and PPi. This process could also discriminate PPi from other inorganic anions. Therefore, a tpy-based fluorescence method for the highly selective recognition of PPi could be developed.
研究领域:
生物化学
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分析化学
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DOI
PubMed
高影响因子
ANALYTICAL SCIENCES
·
2013
·Vol. 29
·期 12
·1165-1169
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IF 1.569
Rao Tongde,Liang Lijiao,Zhang Liying
Diphosphate (pyrophosphate, PPi) is vital for organisms, and therefore its detection is of special importance. In this paper, one cadmium complex of terpyridine (tpy) derivative, 4′-(aminomethylphenyl)-2,2′:6′,2″-terpyridine (aptpy), has been reported for the ratiometric fluorescence recognition of PPi. When added with cadmium, the emission of aptpy at 358 nm was greatly enhanced and red shifted to 397 nm due to the complexation-induced ICT process, which then blue shifted to 349 nm upon the further addition of PPi. Based on the different response of dual fluorescence emissions at 349 and 397 nm, a ratiometric fluorescence method could be successfully established for the fluorescence recognition of PPi. With that, PPi could be successfully discriminated from other structurally similar anions, including nucleotide triphosphates.
研究领域:
生物化学
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分析化学
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DOI
PubMed
高影响因子
ORGANIC & BIOMOLECULAR CHEMISTRY
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2017
·Vol. 15
·期 22
·4859-4866
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IF 3.564
Keyuan Liu,Ganhong Du,Mengna Zhao,Long Ye,Huifang Shen,Liming Jiang
A novel optically active methacrylic polymer with an amide-linked acrylate appendage as a chemosensor was synthesized by atom transfer radical polymerization (ATRP) followed by post-modification through a bottom-up design. The sensing behavior of the polymeric probe to various α-amino acids has been investigated through fluorescence, absorption, circular dichroism (CD), and visual color changes at physiological pH. It was found that the sensor exhibits specificity for the fluorescent recognition of cysteine against other amino acids and thiols in a turn-on mode, being significantly more effective than the corresponding small molecule counterpart. The detection limit was estimated to be in the micromolar range. In addition, the use of this chiral polymer allows the selective discrimination of cysteine enantiomers based on either fluorescence or CD spectral responses. Interestingly, the cysteine assay could also be visualized by the naked eye in the presence of small amounts of ferric ions.
研究领域:
生物化学
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材料科学
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分析化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiaqi Zhang,Haohao Li,Yanrong Li,Shanshan Li,Yang Xu,Huanrong Li
Microplastics (MPs) pollution is considered as one of the most serious threatens to environment and human health. How to identify and trace MPs rapidly is still a challenge. Here, we proposed a simple method to prepare boron-doped carbon nanoparticles (BCNPs) through solvothermal reaction between nitrated pyrene and boric acid for identifying and tracing MPs. These BCNPs exhibited a hydrophobic affinity to plastics and endow plastics with fluorescence emission. Interestingly, we can distinguish polypropylene (PP, strong yellow emission); polyethylene (PE, weak yellow emission); polyvinyl chloride (PVC, strong magenta emission); and polystyrene (PS, weak pink emission) according to fluorescence emission color and intensity upon 365 nm excitation, using these BCNPs via simple adsorption process. Discrepant color emissions were observed in different types of MPs due to plastics medium influence on the surrounding environment of BCNPs. As a result of no fluorescence from single BCNPs, BCNPs can be used as MPs tracing probe in a “turn-on” fluorescence mode caused by combination of BCNPs and MPs. The practical ability of BCNPs for MPs was validated in soil and aqueous models, and semi-quantification was performed using ImageJ software. The described tracing method can be carried out using UV light without any complex instruments, provide an important step toward tracing MPs rapidly in natural conditions.
研究领域:
环境科学
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材料科学
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分析化学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2017
·
IF 2.536
Ying-Peng Zhang,Yu-Ying Dong,Yun-Shang Yang,Hui-Chen Guo,Bi-xia Cao,Shi-Qi Sun
A new pyrazoline-based probe D was designed and synthesized, which can be used as a highly sensitive, selective and reversible recognizing fluorescent to detect Cu 2 + . The recognition properties of this compound was investigated by UV–vis absorption and fluorescence spectrophotometry. The results showed that the probe D forms a 1:1 complex with Cu 2 + and displayed a linear fluorescence response to Cu 2 + with a detection limit of 1.94 × 10 − 7 M. In addition, the probe have a good biocompatibility in living cells.
研究领域:
化学
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生物学
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医学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2014
·Vol. 2
·期 15
·2684-2691
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IF 0
Gang Liu,Mingdi Yang,Lianke Wang,Jun Zheng,Hongping Zhou,Jieying Wu,Yupeng Tian
Three new Schiff base derivatives possessing vagarious blue aggregation-induced emission (AIE) characteristics in tetrahydrofuran (THF)–water were synthesized. Their photophysical properties in solution, aqueous suspension, film and crystalline states, along with their relationships, were comparatively investigated. The crystallographic data for dye 1 and dye 3 indicated that the existence of multiple intermolecular hydrogen bonding interactions restricted intramolecular vibration and rotation. Moreover, the sizes and growth processes of particles with different water fractions were studied using a scanning electron microscope (SEM) and dynamic light scattering (DLS). The results showed that the small homogeneous particles, assembled in an ordered fashion with appropriate water contents, exhibited distinct AIE behavior. Moreover, in a THF–H2O (4 : 1, v/v) solution of HEPES (20 mM) buffer, dye 2 showed fluorescence turn-on sensing towards Cr3+ and Al3+via chelation enhanced fluorescence (CHEF). The 2 : 1 stoichiometries of the sensor complexes (dye 2–Cr3+ and dye 2–Al3+) were calculated from Job plots based on fluorescence titrations.
研究领域:
有机化学
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材料科学
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分析化学
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产品关联
DOI
ANALYTICA CHIMICA ACTA
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2019
·
IF 5.256
Junji Xuan,Jintao Tian
A spiropyran derivative containing an ethyl group ( SPEt ) was applied for fluorescent recognition of Cu 2+ . With Cu 2+ addition, the SPEt -contained solution using a mixed solvent of DMF/H 2 O (9/1, v/v) showed a very strong characteristic emission peak with high quantum yield which is 4.3 times that of the pure SPEt solution. As a result, Cu 2+ was successfully picked out from totally 17 kinds of common metal ions and a detection limit as low as 14.9 fM had been achieved in using this assay system. Particularly, the recognition process was temperature- and time-dependent and could be effectively promoted by heating. In addition, SPEt had been used to image and detect Cu 2+ in mussels. Thus, our results in this study provided an exclusive Cu 2+ recognition via fluorometry in wide temperature, time, and dynamic ranges of assay, enabled a femtomolar scale detection of Cu 2+ by spiropyran derivative, and showed a promising imaging ability of Cu 2+ in marine living organisms.
研究领域:
分析化学
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生物医学
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环境科学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2024
·
IF 4
Yan Fan,Bo Hou,Dongcheng Hu
In this work, a novel Zn(II) coordination polymer (denoted as Zn-CP) was constructed by the mixed ligands of 6-(3′,4′-Dicarboxy phenoxy)isophthalic acid (H 4 L) and 4,4′-bis(imidazolyl)biphenyl (bib) under solvothermal method. And based on the Zn-CP, the surfactant agent sodium dodecyl sulfate (SDS) was further introduced into the structure, thus obtaining the Zn-CP(S) which possessed the same phase but a smaller size compared with the Zn-CP. Interestingly, the Zn-CP(S) presented a significantly ameliorated fluorescent intensity, about 4.36 times higher than that of the Zn-CP prepared in the absence of SDS. Taking advantage of the improved fluorescence trait of the Zn-CP(S), a fluorescence recognition towards hazardous matters was further carried out. The results showed that Zn-CP(S) could simultaneously recognized for Hg 2+ , Cr 2 O 7 2− and a broad range of hazard nitroaromatic explosives with the satisfactory limits of detection (LODs). In addition, Zn-CP could also be used as a recyclable adsorbent to remove methyl orange (MO) in aqueous medium. The maximum equilibrium adsorption capacity of Zn-CP for MO was 61.01 mg/g, and the adsorption mechanism could be attributed to the weak inter-molecular interaction involved π-π stacking and hydrogen bonding between Zn-CP and the MO molecule. Therefore, the bifunctional material has potential application prospects in fluorescence recognition and adsorption.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
ANALYST
·
2016
·Vol. 141
·期 20
·5829-5834
·
IF 4.033
Xiangmin Miao,Zongbing Li,Liansheng Ling
An ultrasensitive fluorescent platform for sequence-specific recognition of double-stranded DNA (dsDNA) based on the quenching of gold nanoparticles (AuNPs) to a fluorophore labeled DNA probe was developed. The target dsDNA could hybridize with the loop portion of the molecular beacon (MB) to form a triplex DNA structure and opened the “stem–loop” structure of the MB; such triplex DNA was used as an assistant probe (AP). Meanwhile, a fluorophore labeled DNA-AuNP probe that contained a specific enzyme cleavage site was introduced and its fluorescence signal was efficiently quenched due to the vicinity of the fluorophore to the AuNP surface. Such a DNA-AuNP probe could hybridize with the 5′ stem portion of the MB in the AP to form duplex DNA strands that contained a specific enzyme cleavage site for the nicking enzyme assisted cleavage reaction, and resulted in the release of the fluorophore from the AuNP surface and the recovery of the fluorescence signal. Because the AP remains intact during such a cleavage process, it could be reused to hybridize with the next DNA-AuNP probe and trigger the nicking nuclease assisted signal amplification. Under optimal conditions, a low detection limit of 3.8 pM was obtained for dsDNA detection, and the assay has high sequence specificity for dsDNA detection.
研究领域:
生物化学
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纳米生物学
·
分子诊断
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DOI
PubMed
高影响因子
POLYMER INTERNATIONAL
·
2021
·Vol. 70
·期 11
·1612-1620
·
IF 2.99
Kuan Liu,Yuhan Wei,Jinyao Xu,Lingfei Qiu,Shaping Hu,Jiayi Wan,Juhua Feng
A novel conjugated polymer PFCZ-IM containing 2-(thiophen-2-yl)-1H-benzo[d]imidazole units was synthesized and characterized. The basic photophysical properties of the polymer and its fluorescence recognition behaviors toward metal ions and amino acids were investigated. In the study of the response of metal ions, PFCZ-IM had high sensitivity to Fe 3+ , Ag + and Cu 2+ , which significantly quenched the fluorescence of the polymer. The binding of the 2-(thiophen-2-yl)-1H-benzo[d]imidazole moiety to Cu 2+ was investigated by density functional theory calculation. Interestingly, [PFCZ-IM-Cu 2+ ] also exhibited outstanding characteristics of fluorescence ‘turn on’ in the presence of cysteine (Cys), as the interaction between Cu 2+ and Cys caused the polymer to dissociate from the complex. In particular, addition of 30 μmol L –1 of Cys can increase the Cu 2+ -quenching fluorescence of PFCZ-IM by 34.8 times with short response time, demonstrating that [PFCZ-IM-Cu 2+ ] has tremendous potential in the actual detection of Cys. This polymer is expected to be utilized for dual fluorescence detection of specific metal ions and Cys. © 2021 Society of Industrial Chemistry.
研究领域:
材料科学
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分析化学
·
生物化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiao He,Siyuan Zhang,Xinjian Cheng
Dendritic fiber nanosilica (DFNS) possesses a unique porous structure, and its potential application for adsorption and separation, particularly of heavy metals, should be explored. This study, to our knowledge, is the first time to introduce fluorescence recognition ability to DFNS and to combine it with polymer materials. Firstly, the fluorescent DFNS (FL-DFNS) was prepared by a Schiff base formation reaction between the naphthalamide fluorophore and the modified DFNS. Then, a two-step approach was employed to fabricate FL-DFNS/polyurethane (FL-DFNS/CSPU-02) nanocomposite materials. FL-DFNS functions as a “turn off” sensor for Hg 2+ /Hg + ions, exhibiting fluorescence quenching of up to 81.1 %/75.9 %. It also has an excellent adsorption capacity to mercury. Specifically, FL-DFNS/CSPU-02 membrane enabled portable detection of Hg 2+ /Hg + ions. Importantly, it exhibited superior performance in the adsorption and separation of Hg 2+ /Hg + ions, achieving a removal efficiency of 97.7 % and 98.0 %, with an absorption capacity of 382.4/373.5 µg/cm 2 . And it can be recycled for at least nine times. Overall, this study confirms the practical application value of FL-DFNS and FL-DFNS/CSPU-02 membrane in the recognition and removal of Hg 2+ /Hg + ions, it will achieve the real application in environmental science and engineering.
研究领域:
环境科学
·
材料科学
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化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）