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Yan Z, Liu J, Miao C, Su P, Zheng G, Cui B, Geng T, Fan J, Yu Z, Bu N, Yuan Y, Xia L. Pyrene-Based Fluorescent Porous Organic Polymers for Recognition and Detection of Pesticides. Molecules 2021; 27:126. [PMID: 35011357 PMCID: PMC8746865 DOI: 10.3390/molecules27010126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 12/10/2021] [Accepted: 12/22/2021] [Indexed: 12/12/2022] Open
Abstract
Eating vegetables with pesticide residues over a long period of time causes serious adverse effects on the human body, such as acute poisoning, chronic poisoning, and endocrine system interference. To achieve the goal of a healthy society, it is an urgent issue to find a simple and effective method to detect organic pesticides. In this work, two fluorescent porous organic polymers, LNU-45 and LNU-47 (abbreviation for Liaoning University), were prepared using π-conjugated dibromopyrene monomer and boronic acid compounds as building units through a Suzuki coupling reaction. Due to the large π-electron delocalization effect, the resulting polymers revealed enhanced fluorescence performance. Significantly, in sharp contrast with the planar π-conjugated polymer framework (LNU-47), the distorted conjugated structure (LNU-45) shows a higher specific surface area and provides a broad interface for analyte interaction, which is helpful to achieve rapid response and detection sensitivity. LNU-45 exhibits strong fluorescence emission at 469 nm after excitation at 365 nm in THF solution, providing strong evidence for its suitability as a luminescent chemosensor for organic pesticides. The fluorescence quenching coefficients of LNU-45 for trifluralin and dicloran were 5710 and 12,000 (LNU-47 sample by ca. 1.98 and 3.38 times), respectively. Therefore, LNU-45 serves as an effective "real-time" sensor for the detection of trifluralin and dicloran with high sensitivity and selectivity.
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Affiliation(s)
- Zhuojun Yan
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (J.L.); (G.Z.); (B.C.); (T.G.); (J.F.); (Z.Y.)
| | - Jinni Liu
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (J.L.); (G.Z.); (B.C.); (T.G.); (J.F.); (Z.Y.)
| | - Congke Miao
- School of Environmental Science, Liaoning University, Shenyang 110036, China; (C.M.); (P.S.)
| | - Pinjie Su
- School of Environmental Science, Liaoning University, Shenyang 110036, China; (C.M.); (P.S.)
| | - Guiyue Zheng
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (J.L.); (G.Z.); (B.C.); (T.G.); (J.F.); (Z.Y.)
| | - Bo Cui
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (J.L.); (G.Z.); (B.C.); (T.G.); (J.F.); (Z.Y.)
| | - Tongfei Geng
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (J.L.); (G.Z.); (B.C.); (T.G.); (J.F.); (Z.Y.)
| | - Jiating Fan
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (J.L.); (G.Z.); (B.C.); (T.G.); (J.F.); (Z.Y.)
| | - Zhiyi Yu
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (J.L.); (G.Z.); (B.C.); (T.G.); (J.F.); (Z.Y.)
| | - Naishun Bu
- School of Environmental Science, Liaoning University, Shenyang 110036, China; (C.M.); (P.S.)
| | - Ye Yuan
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Lixin Xia
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (J.L.); (G.Z.); (B.C.); (T.G.); (J.F.); (Z.Y.)
- Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, Yingkou Institute of Technology, Yingkou 115014, China
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Long R, Zhao C, Zhang Y, Wang Y, Wang Y. Effect of vein-bionic surface textures on the tribological behavior of cylindrical roller thrust bearing under starved lubrication. Sci Rep 2021; 11:21238. [PMID: 34711903 PMCID: PMC8553736 DOI: 10.1038/s41598-021-00800-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 10/12/2021] [Indexed: 11/26/2022] Open
Abstract
To reveal the effect of vein-bionic surface textures on the tribological behavior of cylindrical roller thrust bearings (CRTBs) under starved lubrication, six kinds of leaves (Forsythia, Clausena lansiu, Ash, Purple leaf plum, Pipal and Apricot) were chose and their simplified patterns were fabricated on the shaft washers of CRTBs using laser surface texturing. The coefficients of friction (COFs) of vein-bionic textured bearings were measured using a vertical universal wear test rig. Their mass losses and worn surfaces were also characterized. The results show that: There is important influence of the symmetry of vein-bionic textures and the number of secondary veins on the friction and wear properties of vein-bionic textured CRTBs under starved lubrication. Compared to the smooth group, the COFs and mass losses of vein-bionic textured bearings are all reduced. Among all groups, the tribological performance of bearings with a pattern inspired from Ash is the best. Its wear loss is reduced by 16.23% and its COF is reduced by 15.79%. This work would provide a valuable reference for the raceway design and optimization of roller rolling element bearings.
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Affiliation(s)
- Risheng Long
- Equipment Reliability Institute, Shenyang University of Chemical Technology, Shenyang, 110142, China.
| | - Chao Zhao
- Equipment Reliability Institute, Shenyang University of Chemical Technology, Shenyang, 110142, China
| | - Yimin Zhang
- Equipment Reliability Institute, Shenyang University of Chemical Technology, Shenyang, 110142, China
| | - Yibing Wang
- Equipment Reliability Institute, Shenyang University of Chemical Technology, Shenyang, 110142, China
- School of Mechanical Engineering, Shenyang University of Technology, Shenyang, 110870, China
| | - Yueyong Wang
- Equipment Reliability Institute, Shenyang University of Chemical Technology, Shenyang, 110142, China
- School of Mechanical Engineering, Shenyang University of Technology, Shenyang, 110870, China
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Yan Z, Cui B, Zhao T, Luo Y, Zhang H, Xie J, Li N, Bu N, Yuan Y, Xia L. A Carbazole-Functionalized Porous Aromatic Framework for Enhancing Volatile Iodine Capture via Lewis Electron Pairing. Molecules 2021; 26:5263. [PMID: 34500694 PMCID: PMC8434361 DOI: 10.3390/molecules26175263] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 08/21/2021] [Accepted: 08/27/2021] [Indexed: 11/27/2022] Open
Abstract
Nitrogen-rich porous networks with additional polarity and basicity may serve as effective adsorbents for the Lewis electron pairing of iodine molecules. Herein a carbazole-functionalized porous aromatic framework (PAF) was synthesized through a Sonogashira-Hagihara cross-coupling polymerization of 1,3,5-triethynylbenzene and 2,7-dibromocarbazole building monomers. The resulting solid with a high nitrogen content incorporated the Lewis electron pairing effect into a π-conjugated nano-cavity, leading to an ultrahigh binding capability for iodine molecules. The iodine uptake per specific surface area was ~8 mg m-2 which achieved the highest level among all reported I2 adsorbents, surpassing that of the pure biphenyl-based PAF sample by ca. 30 times. Our study illustrated a new possibility for introducing electron-rich building units into the design and synthesis of porous adsorbents for effective capture and removal of volatile iodine from nuclear waste and leakage.
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Affiliation(s)
- Zhuojun Yan
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (B.C.); (H.Z.); (J.X.); (N.L.)
| | - Bo Cui
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (B.C.); (H.Z.); (J.X.); (N.L.)
| | - Ting Zhao
- School of Environmental Science, Liaoning University, Shenyang 110036, China; (T.Z.); (Y.L.)
| | - Yifu Luo
- School of Environmental Science, Liaoning University, Shenyang 110036, China; (T.Z.); (Y.L.)
| | - Hongcui Zhang
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (B.C.); (H.Z.); (J.X.); (N.L.)
| | - Jialin Xie
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (B.C.); (H.Z.); (J.X.); (N.L.)
| | - Na Li
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (B.C.); (H.Z.); (J.X.); (N.L.)
| | - Naishun Bu
- School of Environmental Science, Liaoning University, Shenyang 110036, China; (T.Z.); (Y.L.)
| | - Ye Yuan
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Lixin Xia
- College of Chemistry, Liaoning University, Shenyang 110036, China; (Z.Y.); (B.C.); (H.Z.); (J.X.); (N.L.)
- Yingkou Institute of Technology, Yingkou 115014, China
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Zhou S, He P, Kasabov N. A Dynamic DNA Color Image Encryption Method Based on SHA-512. Entropy (Basel) 2020; 22:E1091. [PMID: 33286859 PMCID: PMC7597187 DOI: 10.3390/e22101091] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/23/2020] [Accepted: 09/25/2020] [Indexed: 11/16/2022]
Abstract
This paper presents a dynamic deoxyribonucleic acid (DNA) image encryption based on Secure Hash Algorithm-512 (SHA-512), having the structure of two rounds of permutation-diffusion, by employing two chaotic systems, dynamic DNA coding, DNA sequencing operations, and conditional shifting. We employed the SHA-512 algorithm to generate a 512-bit hash value and later utilized this value with the natural DNA sequence to calculate the initial values for the chaotic systems and the eight intermittent parameters. We implemented a two-dimensional rectangular transform (2D-RT) on the permutation. We used four-wing chaotic systems and Lorentz systems to generate chaotic sequences and recombined three channel matrices and chaotic matrices with intermittent parameters. We calculated hamming distances of DNA matrices, updated the initial values of two chaotic systems, and generated the corresponding chaotic matrices to complete the diffusion operation. After diffusion, we decoded and decomposed the DNA matrices, and then scrambled and merged these matrices into an encrypted image. According to experiments, the encryption method in this paper not only was able to withstand statistical attacks, plaintext attacks, brute-force attacks, and a host of other attacks, but also could reduce the complexity of the algorithm because it adopted DNA sequencing operations that were different from traditional DNA sequencing operations.
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Affiliation(s)
- Shihua Zhou
- Key Laboratory of Advanced Design and Intelligent Computing, Ministry of Education, School of Software Engineering, Dalian University, Dalian 116622, China;
- Knowledge Engineering and Discovery Research Institute, Auckland University of Technology, Auckland 1010, New Zealand;
| | - Pinyan He
- Key Laboratory of Advanced Design and Intelligent Computing, Ministry of Education, School of Software Engineering, Dalian University, Dalian 116622, China;
| | - Nikola Kasabov
- Knowledge Engineering and Discovery Research Institute, Auckland University of Technology, Auckland 1010, New Zealand;
- Intelligent Systems Research Center, Ulster University, Londonderry BT52 1SA, UK
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