摘要：
In this paper, carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) functionalized with polyethylenimine (PEI) was prepared and a glassy carbon electrode (GCE) modified with the above nanocomposites (denoted as PEI-MWCNTs-COOH/GCE) was fabricated. Using p-nitrophenol (p-NP) and o-nitrophenol (o-NP) as model compounds, the electrocatalysis of the modified electrode was studied. The results show that the sensitivity and selectivity of the modified electrode are significantly improved due to the synergistic effect of MWCNTs-COOH and PEI. The oxidation peak potentials of o-NP and p-NP were separated by about 60 mV. Second-order derivative linear sweep voltammetry were used for the quantitative analysis of p-NP and o-NP. Under the optimized condition, the linear range for o-NP was 2-100 mu M in the presence of 10 mu M p-NP, while the linear range for p-NP was 0.2-100 mu M in the presence of 10 mu M o-NP. The detection limits were 0.6 mu M and 0.04 mu M for o-NP and p-NP, respectively. The PEI-MWCNTs-COOH/GCE exhibited excellent reproducibility and stability. Finally, the developed sensor was applied for the determination of o-NP and p-NP in environmental water samples with high precision and accuracy.
作者：
Yi Si-Jia;He Xia;Gu Shu-Qi;Deng Zhe-Yu;Li Jia-Hong;...
期刊：
无机化学学报,2023年39(5):874-882 ISSN：1001-4861
通讯作者：
Zhu, XM
作者机构：
[He Xia; Li Jia-Hong; Zhu Xiao-Ming; Deng Zhe-Yu; Yi Si-Jia; Gu Shu-Qi; Zhang Fu-Xing; Yu Jiang-Xi] Hengyang Normal Univ, Coll Hunan Prov,Key Lab Organomet New Mat, Coll Chem & Mat Sci,Key Lab Funct Metal Organ Cpd, Hunan Engn Res Ctr Monitoring & Treatment Heavy M, Hengyang 421008, Hunan, Peoples R China.
通讯机构：
[Zhu, XM ] H;Hengyang Normal Univ, Coll Hunan Prov,Key Lab Organomet New Mat, Coll Chem & Mat Sci,Key Lab Funct Metal Organ Cpd, Hunan Engn Res Ctr Monitoring & Treatment Heavy M, Hengyang 421008, Hunan, Peoples R China.
摘要：
Photochromic dithienylethene (DTE) derivatives with aggregation-induced emission (AIE) performance are appealing for photoelectric functional materials and photopharmacology. However, they often have to be trig-gered by ultraviolet light to induce photoisomerization, severely limiting their potential applications in bio-logical systems. Herein, a novel acceptor (A)-acceptor (A) type DTE derivative (CNSDTE) has been rationally designed and prepared, in which the cyanostilbene moieties as strong electron-withdrawing groups are incor-porated into both sides of DTE skeleton. Its chemical structure is fully verified by 1H NMR, 13C NMR and HRMS. Upon alternating irradiation of visible and near-infrared light, CNSDTE shows excellent photochromic properties in toluene, chloroform and DMSO. Before irradiation with visible light, AIE properties and solid state lumines-cence behavior are observed. Furthermore, CNSDTE-loaded nanoparticles (CNSDTE NPs) are facilely fabricated by taking the amphiphilic Pluronic F127 as the encapsulating matrix. The as-prepared CNSDTE NPs display excellent photoswitching behavior in aqueous media. The experimental results of the excellent AIE properties and photoswitching behaviors in the various media is also confirmed by DFT calculations. In short, it may be employed in functional biomaterials as a novel visible light-triggered fluorescence switch with AIE features.
作者：
Tan, Y. X.;Jiang, W. J.;Feng, Y. L.;Yu, J. X.;Kuang, D. Z.
期刊：
Russian Journal of General Chemistry,2023年93(6):1504-1512 ISSN：1070-3632
通讯作者：
Kuang, DZ
作者机构：
[Kuang, D. Z.; Jiang, W. J.; Yu, J. X.; Tan, Y. X.; Feng, Y. L.; Kuang, DZ] Hengyang Normal Univ, Coll Hunan Prov, Coll Chem & Mat Sci,Key Lab Organometall New Mat, Hunan Prov Engn Res Ctr Monitoring & Treatment Hea, Hengyang 421008, Peoples R China.
通讯机构：
[Kuang, DZ ] H;Hengyang Normal Univ, Coll Hunan Prov, Coll Chem & Mat Sci,Key Lab Organometall New Mat, Hunan Prov Engn Res Ctr Monitoring & Treatment Hea, Hengyang 421008, Peoples R China.
摘要：
Two organotin aryloxyacetate were synthesized by the reaction of 1,2-phenylenedioxydiacetic acid with dibutyltin oxide and tricyclohexyltin hydroxide. The structures were characterized by IR, H-1, C-13 NMR, and X-ray crystal diffraction. Herbicidal activity of the prepared organotin aryloxyacetate was evaluated.
摘要：
Mercury ions (Hg(2+)), as one of heavy transition metals (HTM), is a highly toxic metal that is hazardous to human health. Here an aggregation-induced emission (AIE) fluorescent probe is designed for the highly sensitive and selective detection of Hg(2+). The probe is engineered with a tetraphenylethene (TPE) derivative as the fluorophore and thiopropionic acid as the site of recognition for Hg(2+). Due to the different solubilities of the probe AIE-COOH and its corresponding product after reaction with Hg(2+). The probe demonstrates a maximum detection limit of 22nM and a fast response time of∼100s. Simultaneously, AIE-COOH exhibits outstanding detectivity and hypersensitivity for the detection of Hg(2+) in aqueous solutions. These characteristics demonstrate that AIE-COOH hold a great potential in environmental, food and biological systems. Moreover, we have also successfully applied it to Hg(2+) fluorescence imaging in in living cells.
作者机构：
[Liu, Xing; Feng, Hao; Li, Junhua; Cui, Ying; Wu, Qian; Wang, Fan] Hengyang Normal Univ, Hunan Prov Univ Key Lab Funct Organometall Mat, Coll Chem & Mat Sci, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[Li, Junhua; Qian, Dong] Cent South Univ, Coll Chem & Chem Engn, Hunan Prov Key Lab Efficient & Clean Utilizat Mang, Changsha 410083, Peoples R China.;[He, Lingzhi] Sch Med, Hunan Polytech Environm & Biol, Hengyang 421008, Peoples R China.;[Tong, Haixia; He, Lingzhi] Changsha Univ Sci & Technol, Inst Chem & Biol Engn, Changsha 410114, Peoples R China.;[Liu, Zeng] Cangzhou Dahua Grp Co Ltd, Cangzhou 061000, Peoples R China.
通讯机构：
[Junhua Li] K;[Dong Qian] H;Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China<&wdkj&>Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Hunan Province Universities Key Laboratory of Functional Organometallic Materials, College of Chemistry and Material Science, Hengyang Normal University, Hengyang, 421008, PR China<&wdkj&>Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China
关键词：
Prussian blue analogue;Synthesis;Electrochemical sensing;5-Hydroxytryptamine
摘要：
Lack of highly efficient, inexpensive, and easily available catalysts severely limits the practical applicability of electrochemically sensing assay towards 5-hydroxytryptamine (5-HT). Herein, four kinds of Fe-Co bimetallic Prussian blue analogues (FeCo-PBAs) with different molar ratios of Fe to Co were prepared using a simple coprecipitation method. Interestingly, Fe(III) in K3 [Fe(CN)6] can be reduced to Fe(II) by adding trisodium citrate dehydrate, which could offer a new clue to synthesize PBAs with Fe(II) core ions. With the optimizational FeCo-PBA synthesized at a 0.5/1 M ratio of Fe to Co as an electrocatalyst, the constructed sensor shows excellent comprehensive performance for the 5-HT assay with a high sensitivity of 0.856 mu A mu M-1 and an ultralow detection limit of 8.4 nM. Under the optimum conditions, linearity was obtained in the ranges of 0.1-10.0 mu M and 10.0-200.0 mu M and preferable recoveries ranged from 97.8% to 103.0% with relative standard deviation (RSD) < 4.0%. The integrated properties of FeCo-PBA can be comparable to previously reported electrocatalysts for the 5-HT assay including noble metal-based and expensive carbon (graphene and carbon nanotubes)-based electrocatalysts. The proposed sensor also exhibits outstanding selectivity, reproducibility, and practicality for real sample analyses. This work is the first report on the PBA-based sensor for the 5-HT assay, verifying the practicability of this high-performance sensor for the 5-HT assay.
期刊：
Journal of Organometallic Chemistry,2023年993:122708 ISSN：0022-328X
通讯作者：
Ya-Ping Ou
作者机构：
[Kong, Lingqiao; Ou, Ya-Ping; Xia, Yonglin; Li, Ziteng; Zhu, Xiaoming; Xu, Jingwen; Zhang, Fuxing; Lin, Zishun; Xiao, Wenbo] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China.;[Ou, Ya-Ping; Zhu, Xiaoming; Zhang, Fuxing] Hengyang Normal Univ, Hunan Prov Key Lab Funct Met Organ Cpds, Hengyang 421008, Peoples R China.;[Ou, Ya-Ping; Zhang, Fuxing] Hengyang Normal Univ, Coll Hunan Prov, Key Lab Organometall New Mat, Hengyang 421008, Hunan, Peoples R China.;[Ou, Ya-Ping; Zhang, Fuxing] Hunan Engn Res Ctr Monitoring & Treatment Heavy Me, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ya-Ping Ou] C;College of Chemistry and Material Science, Hengyang Normal University, Hengyang, Hunan 421008, PR China<&wdkj&>Hunan Provincial Key Laboratory of Functional Metal-Organic Compounds, Hengyang Normal University, Hengyang 421008, PR China<&wdkj&>Key Laboratory of Organometallic New Materials, College of Hunan Province, Hengyang Normal University, Hengyang, Hunan 421008, PR China<&wdkj&>Hunan Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of Xiangjiang River, Hengyang, Hunan 421001, PR China
摘要：
A series of asymmetrical terpyridine ruthenium-TAA redox-active organometallic complexes was pre-pared and characterized. The bonding and electronic properties of these complexes were investigated by spectro-electrochemistry and theoretical calculations. Electrochemical results revealed that four com-plexes exhibited two successive single-electron redox processes, in which the first-step electrochemical behavior of tpyRu-ethynyl-TAA complexes occurred at the triarylamine moiety, the first-step based-metal oxidation of Cl-tpyRu-TAA complex was decided, and their half-wave potential difference AE decreased gradually. The near-infrared (NIR) spectroscopic results of mixed-valence states obtained by spectro-electrochemistry showed that they all have NIR multiple absorption characteristics. The maximum ab-sorption wavelength of singly-oxidized tpyRu-ethynyl-TAA molecules redshifted with bridge conjugate extension, whereas Cl-tpyRu-TAA mixed-valence state only displayed weak absorption at high-energy re-gion, as later confirmed by TDDFT calculation. The electron coupling parameters Hab obtained from the inter-valence charge transfer analysis of mixed-valence states by the Marcus-Hush theory decreased grad-ually with the extension of the bridge chain, consistent with the electrochemical results. In addition, DFT calculation reflected that the HOMO contribution in bridge chain of neutral molecules increased with the conjugate bridge extension, and the spin density distribution of mixed-valence states was mainly localized on the aryl bridge and NAr2 and featured the less metal character and hence less charge de-localization. The above results concluded that the degree of electronic coupling and the order of redox processes are greatly affected by conjugated bridge and the coordination model between terpyridine and ruthenium.(c) 2023 Elsevier B.V. All rights reserved.
期刊：
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING,2023年58(6):1-10 ISSN：1093-4529
通讯作者：
Zhifeng Xu
作者机构：
[Deng, Peihong; Xu, Zhifeng; Li, Junhua; Li, Lizhen] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang, Peoples R China.;[Deng, Peihong; Xu, Zhifeng; Li, Junhua; Li, Lizhen] Key Lab Organometall New Mat Hunan Prov, Hengyang, Peoples R China.;[Deng, Peihong; Xu, Zhifeng; Li, Junhua; Li, Lizhen] Engn Res Ctr Monitoring & Treatment Heavy Met Poll, Hengyang, Peoples R China.;[Xu, Zhifeng] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[Zhifeng Xu] C;College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, PR China<&wdkj&>Key Laboratory of Organometallic New Materials of Hunan Province, Hengyang, PR China<&wdkj&>Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of Xiangjiang River, Hengyang, PR China
摘要：
Molecularly imprinted polymers (MIPs) are synthetic polymers with predetermined selectivity for a given analyte. One major problem associated with MIPs is the inaccessibility of a large fraction of the recognition sites that remain buried within the polymeric matrix. To address this problem, the high selectivity imparted by the imprinting technique and the porosity of three-dimensional (3D) graphene oxide (GO)-based porous materials were utilized in this work to prepare a 3D GO-based Cu(II)-ion-imprinted material (hereafter denoted as IIM) via one-pot reactions of GO, chitosan (CS), and glutaraldehyde in the presence of Cu(II). Results of equilibrium binding experiments show that IIM has a high template-ion binding capacity (1.75 mmol g(-1)) and good imprinting factor (2.19). Further, results of selectivity tests indicate that IIM has a high Cu(II)-recognition ability. IIM also has a fast binding rate and satisfactory reusability. In addition, the Langmuir isotherm model was well fitted with the experimental data, indicating the monolayer adsorption of Cu(II) ions. The present work provided a convenient approach to prepare 3D GO-based imprinted materials that are promising for enrichment or recycling of target compounds from wastewater.
摘要：
Six new di-p-chlorobenzyltin complexes {[X-C6H4(O)C=N-N=C(Me)COO](MeOH)(p-Cl-C6H4CH2)(2)Sn}(2) (X= 2-OH- (C1), 4-OH- (C2), 4-NO2- (C3), 4-t-Bu-(C4), 4-MeO-(C5) or 4-Me- (C6)) were synthesized by the reactions of substituted arylhydrazides, sodium pyruvate, and di(p-chlorobenzyl)tin dichloride. All the complexes were characterized by IR, H-1, C-13, Sn-119 NMR spectra, HRMS, X-ray single crystal diffraction, and TGA. The complexes (C1 similar to C6) were screened for their in vitro anticancer activity against MCF-7, HepG2, and NCI-H460 cancer cell lines. In those complexes, complex C2 showed promising anticancer activity. The interaction between C2 and calf thymus DNA was studied by UV absorption and fluorescence spectroscopy. The results showed that the interaction between the complex C2 and DNA was intercalation. Molecular docking was also performed to verify the binding specificity of the complex C2 with DNA.
摘要：
The abnormal accumulation of copper ions (Cu(2+)) is considered to be one of the pathological factors of Alzheimer's disease (AD), but the internal relationship between Cu(2+) and AD progression is still not fully clear. In this work, a sensitive and selective near-infrared fluorescent copper ion probe (DDP-Cu) was designed for quantification and visualization of Cu(2+) level in lysates, living cells, living zebrafish and brain tissues of drosophila and mice with AD. By using this probe, we demonstrated that the content of Cu(2+) in the brains of AD mice and drosophila enhanced nearly 3.5-fold and 4-fold than that of normal mice and drosophila, respectively. More importantly, pathogenesis analysis revealed that elevated Cu(2+) led to changes in factors closely associated with AD, such as the increasing of reactive oxygen species(ROS), the aggregation of amyloid-β protein (Aβ) and nerve cell cytotoxicity. These findings could promote the understanding of the roles between Cu(2+) and AD.
作者机构：
[Lin, Jianguo; Mei, Fangsheng] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Peoples R China.;[Zhang, Zhijian] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421001, Hunan, Peoples R China.;[Yu, Yang; Gao, Jiangxiong; Lin, Xiaoliang] Zhuzhou Huarui Precis Cutting Tools Co Ltd, Zhuzhou 412000, Peoples R China.;[Yuan, Tiechui] Cent South Univ, Powder Met Res Inst, Changsha 410083, Peoples R China.
通讯机构：
[Fangsheng Mei] S;[Zhang Zhijian] C;School of Materials Science and Engineering, Xiangtan University, Xiangtan, 411105, PR China<&wdkj&>College of Chemistry and Materials Science, Hengyang Normal University, Hengyang, Hunan, 421001, PR China
