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Xiao H, Zhang Z. Sensitive and selective detection of p-nitroaniline with the assistance of a fluorescence capillary imprinted sensor. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:3940-3947. [PMID: 37519198 DOI: 10.1039/d3ay00799e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
A fluorescence capillary imprinted sensor was first prepared with high selectivity and sensitivity for the detection of p-nitroaniline. The fluorescence imprinted polymer prepared by the sol-gel method using blue CdTe quantum dots as the fluorescence source was self-sucked into an activated capillary to form the fluorescence imprinted capillary (CdTe@FMIP-CA) sensor. The specificity and selectivity tests showed that the CdTe@FMIP-CA sensor has a high selective recognition ability toward p-nitroaniline. The CdTe@FMIP-CA sensor can quickly and specifically recognize p-nitroaniline within 2 min with a high specific fluorescence response efficiency. The fluorescence intensity of the CdTe@FMIP-CA sensor remained stable within 60 min. A good linear relationship was established between the fluorescence quenching efficiency of the CdTe@FMIP-CA sensor with a p-nitroaniline concentration range of 0.2-100 μmol L-1 with the detection limit of 4.6 nmol L-1 and the quantitation limit of 0.2 μmol L-1. The imprinting factor was calculated as 3.88. The method has been successfully applied for the determination of trace p-nitroaniline in lake water, tap water, urine, and serum samples. The CdTe@FMIP-CA sensor realized the sensitive and selective detection of p-nitroaniline with the lower consumption of microvolume reagent (18 μL per time), which provided a novel strategy for highly sensitive analysis of microvolume trace pollutants.
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Affiliation(s)
- Huiwen Xiao
- College of Chemistry and Chemical Engineering, Jishou University, Hunan 416000, PR China.
| | - Zhaohui Zhang
- College of Chemistry and Chemical Engineering, Jishou University, Hunan 416000, PR China.
- College of Biological and Chemical Engineering, Changsha University, Changsha, 410022, PR China
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Yuan R, Zhang M, Sun H. Design and Construction of an Azo-Functionalized POP for Reversibly Stimuli-Responsive CO2 Adsorption. Polymers (Basel) 2023; 15:polym15071709. [PMID: 37050323 PMCID: PMC10097301 DOI: 10.3390/polym15071709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 03/27/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023] Open
Abstract
A porous azo-functionalized organic polymer (JJU-2) was designed and prepared via oxidative coupling polymerization promoted by FeCl3. JJU-2 exhibited reversibly stimuli-responsive CO2 adsorption properties as a result of the trans/cis isomerization of the polymer’s azo-functionalized skeleton. Under UV irradiation and heat treatment, this porous material displayed various porous structures and CO2 adsorption properties. The initial Brunauer-Emmett-Teller (BET) surface area of JJU-1 is 888 m2 g−1. After UV irradiation, the BET surface area decreases to 864 m2 g−1, along with the decrease of micropores around 0.50 nm and 1.27 nm during the trans-to-cis isomerization process. In addition, CO2 sorption isotherms demonstrate an 8%t decrease, and the calculated Qst of CO2 has decreased from 29.0 kJ mol−1 to 26.5 kJ mol−1 due to the trans to cis conversion of the azobenzene side group. It is noteworthy that JJU-2′s CO2 uptakes are nearly constant over three cycles of alternating external stimuli. Therefore, this azo-functionalized porous material was a potential carbon capture material that was responsive to stimuli.
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Cui ML, Zhang GS, Kang ZW, Zhang XY, Xie QF, Huang ML, Wang BQ, Yang DP. Iridium nanoclusters for highly efficient p-nitroaniline fluorescence sensor. Microchem J 2023. [DOI: 10.1016/j.microc.2023.108520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Luminescent Cd coordination polymer based on thiazole as a dual-responsive chemosensor for 4-nitroaniline and CrO 42- in water. Sci Rep 2023; 13:269. [PMID: 36609481 PMCID: PMC9822996 DOI: 10.1038/s41598-023-27466-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 01/02/2023] [Indexed: 01/07/2023] Open
Abstract
A novel highly fluorescent cadmium metal-organic framework, [Cd (DPTTZ) (OBA)] (IUST-3), synthesized by using two linkers 2, 5-di (pyridine-4-yl) thiazolo [5, 4-d] thiazole (DPTTZ) and 4, 4'-oxybis (benzoic acid) (OBA) simultaneously, which exhibits a two-dimensional framework. The characteristics of this Cd-MOF were investigated by single-crystal X-ray diffraction, Fourier transform infrared spectroscopy, elemental analysis, powder X-ray diffraction, and thermogravimetry analysis. The IUST-3 exhibits excellent luminescence property and good stability in water. Luminescent experiments indicate that the IUST-3 has remarkable sensitivity and selectivity for the detection of 4-nitroaniline (4-NA), and CrO42- anion with KSV = 1.03 × 105 M-1 (4-NA) and KSV = 2.93 × 104 M-1 (CrO42-) and low limit of detection 0.52 µM (4-NA) and 1.37 µM (CrO42-). In addition, the possible fluorescence quenching mechanism was explored in this paper.
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Yuan R, Sun H, He H. Rational Construction of a Responsive Azo-Functionalized Porous Organic Framework for CO 2 Sorption. Molecules 2021; 26:4993. [PMID: 34443581 PMCID: PMC8398054 DOI: 10.3390/molecules26164993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/08/2021] [Accepted: 08/12/2021] [Indexed: 11/16/2022] Open
Abstract
An azo-functionalized porous organic framework (denoted as JJU-1) was synthesized via FeCl3-promoted oxidative coupling polymerization. By virtue of a porous skeleton and a light/heat responsive azo functional group, this task-specific JJU-1 displays a reversible stimuli-responsive adsorption property triggered by UV irradiation and heat treatment. The initial Brunauer-Emmet-Teller (BET) surface area of this porous material is 467 m2 g-1. The CO2 sorption isotherms exhibit a slight decrease after UV irradiation because of the trans to cis conversion of the azo functional skeleton. It is worth mentioning that the responsive CO2 adsorption performance can be recycled for three cycles via alternating external stimuli, confirming the excellently reversible switchability of trans-to-cis isomerization and controllable CO2 adsorption.
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Affiliation(s)
- Rongrong Yuan
- Department of Materials Science and Engineering, Jilin Jianzhu University, Changchun 130118, China; (R.Y.); (H.S.)
| | - Hao Sun
- Department of Materials Science and Engineering, Jilin Jianzhu University, Changchun 130118, China; (R.Y.); (H.S.)
| | - Hongming He
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
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Bagherian G, Mosayebi F, Arab Chamjangali M, Ashrafi M, Amin AH. A comparative study of novel spectrophotometric methods for simultaneous determination of nitroaniline isomers in their binary mixtures with highly severe overlapping spectra. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 249:119278. [PMID: 33338936 DOI: 10.1016/j.saa.2020.119278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 11/10/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
In the present work, four simple and economic spectrophotometric methods, namely constant center (CC), ratio difference (RD), H-point standard addition method (HPSAM), and ratio H-point standard addition method (RHPSAM) were employed for the simultaneous determination of meta and para-nitroaniline with severely overlapping spectra without unitizing the preliminary physical separation techniques. In each method, the parameters affecting the resolution of the spectra were optimized to determine the cited isomers in a binary mixture with a high accuracy. Under the optimized conditions, the results obtained showed that from cited methods used, the CC and RD methods have the least errors in determination of the concentration of highly spectral overlapping species. The mean percentage recovery values for the binary mixture of meta- and para-nitroaniline were found to be 95.98 and 98.78 using the RD method, and 101.85 and 100.23 using the CC method, respectively. For comparison of the powerful multivariate methods including the principal component regression (PCR) and partial least squares (PLS) were also applied. The mean percentage recovery values for the binary mixtures of the cited isomers were found to be 101.62 and 101.47 using the PCR method, and 101.00 and 101.36 using the PLS method, respectively. A statistical comparison of the methods demonstrated that there was no significant difference between the RD, CC, PCR, and PLS methods and the reported HPLC method regarding both accuracy and precision. The proposed methods have an admissible precision and accuracy for determination of the two isomers in their binary mixtures in tap water as a real sample.
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Affiliation(s)
- Ghadamali Bagherian
- College of Chemistry, Shahrood University of Technology, Shahrood P.O. Box 36155-316, Iran.
| | - Fatemeh Mosayebi
- College of Chemistry, Shahrood University of Technology, Shahrood P.O. Box 36155-316, Iran
| | | | - Motahare Ashrafi
- College of Chemistry, Shahrood University of Technology, Shahrood P.O. Box 36155-316, Iran
| | - Amir Hossein Amin
- College of Chemistry, Shahrood University of Technology, Shahrood P.O. Box 36155-316, Iran
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Xie W, Zhang J, Zeng Y, Wang H, Yang Y, Zhai Y, Miao D, Li L. Highly sensitive and selective detection of 4-nitroaniline in water by a novel fluorescent sensor based on molecularly imprinted poly(ionic liquid). Anal Bioanal Chem 2020; 412:5653-5661. [PMID: 32621093 DOI: 10.1007/s00216-020-02785-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 06/12/2020] [Accepted: 06/22/2020] [Indexed: 12/15/2022]
Abstract
A novel molecularly imprinted fluorescent sensor for the determination of 4-nitroaniline (4-NA) was synthesized via free radical polymerization with 3-[(7-methoxy-2-oxo-2H-chromen-4-yl)methyl]-1-vinyl-1H-imidazol-3-ium bromide as the fluorescence functional monomer, 4-NA as the template molecule, ethylene glycol dimethacrylate as the cross-linker, and 2,2'-azo(bisisobutyronitrile) as the initiator. The obtained fluorescent poly(ionic liquid) was characterized through Fourier transform infrared, scanning electron microscopy, Brunauer-Emmett-Teller analysis, and fluorescence spectrophotometry. The fluorescent sensor had high fluorescence intensity, short detection time (0.5 min), good selectivity, and excellent sensitivity (limit of detection = 0.8 nM) for 4-NA, with good linear relationships of 2.67-10,000 nM. The practical applicability of the fluorescence sensor in detecting 4-NA in industrial wastewater and spiked environmental water was demonstrated, and a satisfactory result was obtained. Graphical abstract Highly sensitive and selective detection of 4-nitroaniline in water by a novel fluorescent sensor based on molecularly imprinted poly(ionic liquid).
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Affiliation(s)
- Wei Xie
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213016, Jiangsu, China.,College of Biological, Chemical Sciences and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing, 314001, Zhejiang, China
| | - Jian Zhang
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing, 314001, Zhejiang, China
| | - Yanbo Zeng
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing, 314001, Zhejiang, China
| | - Hailong Wang
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing, 314001, Zhejiang, China
| | - Yiwen Yang
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing, 314001, Zhejiang, China.
| | - Yunyun Zhai
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing, 314001, Zhejiang, China
| | - Dongwei Miao
- School of Petrochemical Engineering, Changzhou University, Changzhou, 213016, Jiangsu, China
| | - Lei Li
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing, 314001, Zhejiang, China.
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