ANALYTICAL SCIENCES
·
2017
·Vol. 33
·期 1
·23-27
·
IF 1.228
Wang Liang,Zhang Yi,Park Yeonju,Chen Lei,Jung Young Mee
Iii this paper, we demonstrate a new promising resonance Raman (RR)-based method for the determination of Fe 3+ concentrations in aqueous solutions. Iron ions were quantified at a low concentration range by employing hydroxylamine hydrochloride as the reductant, and phenanthroline as the complexing agent, (hereby reducing Fe 3+ to Fe 2+ . The addition of Fe 3+ to the detection reagent resulted in a rapid color change from colorless to orange-red. together with an obvious new RR band appearing at 1459 cm −1 . Herein, the RR intensity of the phenanthroline-Fe 2+ complex strengthened with increasing Fe 3+ concentration, which was identified from the variation of the Raman spectra. Therefore, we successfully detected Fe 3+ at lower concentrations using the proposed method, illustrating its great potential for the detection of Fe 3+ with abundant RR fingerprint information. More importantly, the proposed method exhibited a wide liner range from 0.05 to 10 μg/mL.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Jinke Wang,Yao Huang,Lingwei Ma,Xin Guo,Shanghao Wu,Chenhao Ren,Dawei Zhang
In this work, a smart coating with corrosion-sensing and self-healing dual functions was developed on carbon steel by incorporating the urea formaldehyde (UF) microcapsules loaded with 1,10-phenanthroline (Phen) molecules. Phen as both the corrosion-sensing indicator and corrosion inhibitor was encapsulated into the UF microcapsules via the oil-water (O/W) emulsion in-situ polymerization method. When the coating was damaged, the Phen molecules released from UF/Phen microcapsules would react with the Fe 2+ ions generated from the active anodic corrosion site of the carbon steel substrate, and displayed a prominent red color chelate compound for corrosion-sensing application. During the neutral salt spray test, the corrosion evolution underneath the damaged coating can be rapidly detected within 15 min. Besides, the corrosion activity near the coating scratch can be effectively inhibited due to the adsorption of released Phen on the exposed substrate surface. After 72 h of immersion in 3.5 wt% NaCl solution, the low frequency impedance modulus of the scratched coating containing 10 wt% UF/Phen microcapsules was almost 7 times that of the scratched blank coating. The smart coating can not only achieve timely corrosion sensing, but also suppress the corrosion activity, which is of great importance for practical corrosion protection applications.
研究领域:
材料科学
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腐蚀与防护
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DOI
高影响因子
Canadian Journal of Chemistry
·
2023
·Vol. 101
·期 10
·
IF 1.1
Haoshun Zhang,Peiyu Lan,Qinnan Yang,Ciling Li,Liting Zhao,Xinhuang Kang,Yubin Li
Effective cysteine (Cys) detection is extremely important for early disease monitoring and diagnosis. In this study, a fluorescent probe (PHO) comprising 1,10-phenanthroline carboxaldehyde as the ligand and cobalt as the central ion was synthesized to detect Cys. The synthesized PHO exhibited enhanced fluorescence at 603 nm in the presence of Cys in HEPES buffer. Furthermore, the probe detected Cys concentrations as low as 0.6 μmol/L, demonstrating high sensitivity. Additionally, a strong linear relationship was established between the Cys concentration and normalized intensity of fluorescence. Importantly, the high selectivity was retained even in the presence of other interfering compounds. Consequently, this method can serve as a novel approach for detecting Cys in physiological systems.
研究领域:
生物化学
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医学诊断
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分析化学
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DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2020
·Vol. 36
·期 5
·934-939
·
IF 1.063
Li Ruyue,Wu Mingwei,Pan Biwei,Li Meng,Huang Jun
A 1,10-phenanthroline based polymer named PPPhen( i.e. , polymer from pyrene 1,10-phenanthrolin) was prepared by the Friedel-Crafts reaction of 1,10-phenanthroline and pyrene cross-linked with dimethoxymethane. The related Pd catalyst Pd@PPPhen was prepared by supporting Pd nanoparticles(NPs) on the PPPhen material. PPPhen and Pd@PPPhen were characterized by means of scanning electron microscopy(SEM), transmission electron microscopy, N 2 adsorption-desorption, Fourier-transform infrared and X-ray photoelectron spectroscopy analyses. The results showed that PPPhen polymer was highly porous and that the phenanthroline group can enhance the stability of the Pd nanoparticles. Pd@PPPhen also exhibited good catalytic activity in the aerobic oxidation of alcohols to aldehydes and ketones, and Pd@PPPhen was recyclable with durable activity and retentive structures.
研究领域:
化学
·
催化材料
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Yingling Zhong,Yuandong Wu,Dajiang Mei,Shaoguo Wen,Thomas Doert
Three 1,10-phenantroline zinc halide complexes were successfully synthesized under solvothermal method and structurally characterized by single-crystal X-ray diffraction analysis. The three title complexes Zn(1,10-phen)I 2 ( 1 ), Zn(1,10-phen) 2 I 2 ( 2 ) and Zn 2 (1,10-phen) 2 C 2 O 4 Br 2 ( 3 ), crystallize in the triclinic space group P 1 ¯ (No.2) with different unit cell parameters, are isolated neutral molecules. The extra stretching force from another 1,10-phen ligand in 2 lead to the Zn−N bond lengths longer than the corresponding in 1 . Meanwhile, the molecules of Zn(1,10-phen)I 2 and Zn(1,10-phen) 2 I 2 further connect each other via the π-π interactions between the adjacent phenanthrolines to form a pseudo-two-dimensional layer which parallel to b-axis. Their face-to-face distance of π-π stacking interactions between the adjoining 1,10-phen rings is 3.7264 Å and 3.4435 Å, respectively. The zinc bromide complex 3 contains C−H···O intramolecular and C−H···Br (2-D) interlayer hydrogen bonding, which contributed to the connection between the parallel zig-zag molecules. The distance of phenanthroline rings in intramolecular and interlayer is 2.6071 Å and 3.8125 Å. The luminescent emissions of free ligand 1,10-phen and its zinc halide complexes were measured in various solvents. These zinc halide complexes show the obvious luminescent phenomenon with grass-green, yellow-green and light yellow in Dimethyl sulfoxide (DMSO), respectively (the maximum emission wavelength is 530 nm, 539 nm and 496 nm). The maximum emission wavelength for 2 has a little red-shifted compared with 1 . It can be concluded that the number of ligand and the electron density on coordinated Zn atoms influence the emission wavelength through charge transfer from ligand to the metal. The emission wavelengths of 3 are also slightly red-shifted compared with the free 1,10-phen ligand, which is attributed to the coordination effects of the 1,10-phen ligands to the Zn cations and [C 2 O 4 ] 2− group.
研究领域:
化学
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材料科学
·
晶体学
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DOI
高影响因子
ANALYST
·
2012
·Vol. 138
·期 3
·887-893
·
IF 4.23
Lu Zhang,Kao Zhu,Tao Ding,Xianyun Hu,Qingjiang Sun,Chunxiang Xu
We have developed a new fluorescent probe based on direct conjugation between 1,10-phenanthroline (Phen) and water-soluble thioglycolic acid (TGA) capped CdTe quantum dots (QDs) for the detection of double-stranded DNA (dsDNA). Phen could directly adsorb onto the QDs surface by metal-affinity driven coordination, quenching the photoluminescence (PL) of QDs via the photoinduced hole transfer process; addition of dsDNA would bring the restoration of QDs PL, as Phen could intercalate into dsDNA followed by its dissociation from the QDs surface. The dependence of QDs PL on the dsDNA amount as well as temperature was utilized to investigate the Phen–dsDNA interaction. The obtained binding constant of the QD–Phen dyad was 2–3 orders of magnitude higher than that of Phen-based metal complexes. Both the binding constant and the binding site of dsDNA with Phen increased with the elevated temperature, owing to an endothermic process. At 37 °C, sensitive detection of dsDNA with a detection limit of ∼3 nmol L−1 was achieved. Therefore, the QD-molecule direct conjugation based fluorescent probe could provide an effective alternative to those based on QD-bioconjugation and QD-ionic conjugation.
研究领域:
生物化学
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分子生物学
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纳米生物学
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DOI
PubMed
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2014
·
IF 2.212
Xiao-Li Tang,Ai-Qing Ma,Guo-Qiang Cai,Long-Guan Zhu
Three complexes with same components, PdII, 2-sulfobenzoate and 1,10-phenanthroline, [Pd(phen)2]⋅2(2-Hsb) (1), [Pd(phen)2](2-Hsb)⋅(2-Hsb)⋅2H2O (2), and [Pd(phen)2]⋅[Pd(phen)(2-sb)2]⋅6H2O (3), where 2-H2sb is 2-sulfobenzoic acid and phen is 1,10-phenanthroline, were synthesized and characterized by IR spectra, elemental analyses, thermogravimetric analyses, UV–vis absorption spectra and powder X-ray analysis. Single X-ray crystal structural analyses showed that 1 and 2 are ionic species, while 3 is a dimer through weak bonding interactions. In 1 and 2, 2-Hsb− ligands are partly deprotonated and it is fully deprotonated in 3. In 2 and 3 there are hydrogen bonds and π–π interactions. Extended hydrogen bonding structures for 2 and 3 are 1-D and 3-D architectures, respectively. The oxidation of methyl phenyl sulfide by 1-3 as homogeneous catalysts gave high conversion and selectivity in methanol. The addition of 2-sulfobenzoic acid in the catalytic reaction further promotes the conversion.
研究领域:
化学
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材料科学
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DOI
高影响因子
Catalysts
·
2018
·Vol. 8
·期 6
·245
·
IF 3.465
Ya Chu,Lin Gu,Xiuping Ju,Hongmei Du,Jinsheng Zhao,Konggang Qu
A composite catalyst was obtained by covalently linking G4-NH2dendrimers and 1,10-phenanthroline-5-carboxylic acid on the surface of carbon powder, and the composite was named as PMPhen/C. In order to improve the catalytic performance of the composite, copper ions (II) were introduced to PMPhen/C by complex to form the PMPhen-Cu/C catalyst. Scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) were applied to investigate the surface microstructure and elemental compositions of the catalysts. The results from electrochemical analysis show that PMPhen/C reduced oxygen to hydrogen peroxide (H2O2) through a two-electron transfer process. PMPhen-Cu/C could reduce oxygen to water through a four-electron pathway. Except the slightly lower initial reduction potential, PMPhen-Cu/C has a comparable oxygen reduction ability (ORR) to that of the commercially available Pt/C catalyst, which makes it a potential candidate as the cathodic catalyst in some fuel cells running in neutral medium, such as a microbial fuel cell.Keywords:Polyamidoamine (PAMAM) G4-NH2dendrimers;phenanthroline;covalent link;ORR catalyst
研究领域:
材料科学
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电化学
·
催化领域
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产品关联
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Xiao Geng,Jianfeng Zhang,Benzheng Xia,Yuqiu Guan,Qiyu Meng,Zhuojun Jiang,Yifan Zhang,Bharat Prasad Sharma,Yufeng Liang,Liangrong Yang,Zheng Li
Lithium is becoming increasingly important due to its indispensable role in lithium-ion batteries. The direct extraction of lithium from salt lakes, which are a main source of lithium, is challenging due to the coexistence of many interfering alkali and alkaline earth metals. In this work, we report that a synergistic solvent extraction (SSX) system containing 2,9-dialkyl-1,10-phenanthroline and a hydrophobic anion ([NTf 2 ] − ) could extract lithium selectively with a high lithium loading capacity from solutions containing both alkali (sodium, potassium) and alkaline earth metals (magnesium, calcium), enabling the direct recovery of lithium from complex salt lakes. The outstanding lithium extraction performance of the SSX system is unprecedented, to the best knowledge of the authors. Through various characterizations and X-ray diffraction of the complex crystals, the extraction mechanism has been revealed. This SSX system will potentially promote more efficient recovery of lithium from salt lakes.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2024
·
IF 7.4
Lingwei Ma,Di Xu,Shanghao Wu,Xin Guo,Tong Liu,Mumeng Wei,Jinke Wang,Zhibin Chen,Dawei Zhang
A dual-functional coating was developed by incorporating carbon dots (CDs) based additives with corrosion sensing and inhibition properties into a polyurethane (PU) matrix. The complex formed between CDs and 1,10-Phenanthrolin-5-amine (APhen) displays not only a bright red color but also fluorescence quenching in the presence of Fe (II) and Fe (III) ions produced during steel corrosion . Electrochemical measurement and molecular simulation results demonstrate that compared with the CDs, APhen, and their mixture, CDs-APhen complex with multiple surface functional groups, chemical bonding, parallel adsorption, and higher binding energy with iron surface can offer a good inhibition effect against steel corrosion in 1 M HCl solution. Subsequently, CDs-APhen was anchored onto sericite (SC) structure and then incorporated into PU coating . A PU coating containing 2 wt% CDs-APhen@SC demonstrated good barrier property and self-healing performance, which was ascribed to the corrosion inhibition property of CDs-APhen and the layered structure of SC. In addition, the released CDs-APhen complex provided rapid color/fluorescence responses to Fe ions , offering sensitive self-reporting performance during the initial stage of steel corrosion.
研究领域:
材料科学
·
腐蚀防护
·
表面工程
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR MODELING
·
2015
·Vol. 21
·期 12
·1-10
·
IF 1.736
Xu Shengxian,Wang Jinglan,Zhao Feng,Xia Hongying,Wang Yibo
Two copper(I) complexes [Cu(Pyz-Phen) 2 ]PF 6 (1) and [Cu(POP)(Pyz-Phen)]PF 6 (2) (Pyz-Phen = pyrazino[2,3- f ] [1, 10]phenanthroline, POP = bis[2-diphenylphosphino]-phenyl]ether) have been synthesized and characterized. The photophysical properties of these complexes in solution have been studied. The electronic absorption spectrum of complexes 1 exhibit the lowest-lying MLCT absorption band at 459 nm and high-energy ligand-based transitions at 275 nm, while that of complex 2 exhibits the MLCT/LLCT band at 400 nm and ligand π-π* band at 262 nm. In addition, both 1 and 2 show similar phosphorescence 3 MLCT/ 3 LLCT emissions with maximum emission wavelengths of 569 and 572 nm, respectively. Density functional theory (DFT) and time-dependent density functional theory (TDDFT) were employed to rationalize the photophysical properties of the complexes studied. The theoretical data confirm the assignment of the experimental absorption spectra and the nature of the emitting states.
Photophysical properties of copper(I) complexes containing pyrazine-fused phenanthroline ligands
研究领域:
化学
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材料科学
·
理论计算
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DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Juan Bai,Nan Jia,Pujun Jin,Pei Chen,Jia-Xing Jiang,Jing-Hui Zeng,Yu Chen
Recently, the surface chemical functionalization and morphology control of precious metal nanostructures have been recognized as two efficient strategies for improving their electroactivity and/or selectivity. In this work, 1, 10-phenanthroline monohydrate (PM) functionalized Pt nanodendrites (Pt-NDs) on carbon cloth (CC) (denoted as PM@Pt-NDs/CC) and polyethylenimine (PEI) functionalized Pt-NDs on CC (denoted as PEI@Pt-NDs/CC) are successfully achieved by immersing Pt-NDs/CC into PM and PEI aqueous solutions, respectively. PEI functionalization of Pt-NDs/CC improves its electroactivity for hydrogen evolution reaction (HER) due to local proton enrichment whereas PM functionalization of Pt-NDs/CC improves its electroactivity for formic acid oxidation reaction (FAOR) by facilitating dehydrogenation pathway. With such high activity, a two-electrode electrolyzer is assembled using PM@Pt-NDs/CC as the anodic electrocatalyst and PEI@Pt-NDs/CC as the cathodic electrocatalyst for electrochemical reforming of formic acid, which only requires 0.45 V voltage to achieve the current density of 10 mA cm −1 for high-purity hydrogen production, much lower than conventional water electrolysis (1.59 V). The work presents an example of interfacial engineering enhancing electrocatalytic activity and indicates that electrochemical reforming of formic acid is an energy-saving electrochemical method for high-purity hydrogen production.
研究领域:
材料科学
·
电化学
·
催化反应
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）