New ferrocenyl naphthoquinone fused crown ether chemosensors: Highly selective, kinetically and regio controlled colorimetric, beryllium ion recognition

Publication date: 1 August 2018 Source:Journal of Organometallic Chemistry, Volume 868 Author(s): Yusuf Alcay, Ozgur Yavuz, Ali Gelir, Secil Kirlangıc Atasen, Kaan Karaoglu, Baris Yucel, Nurcan Şenyurt Tuzun, Ismail Yilmaz New organometallic chemosensors which are based on triad molecules, ferrocenyl naphthoquinone linearly/angularly fused crown ethers (Fc–cnq–1a and Fc–cnq–1b) bearing ferrocene, quinone, and crown ether functional groups together, were synthesized and utilized for selective sensing trace amount of Be2+ ion (5.41 μM) among other metal cations. The UV–vis spectrophotometric titration experiments at controlled temperatures (25–60 °C) resulted in characteristic spectral changes in the intramolecular charge-transfer (CT) transitions upon addition of Be2+ ion into the solution of sensors Fc–cnq–1a and Fc–cnq–1b. However, no spectral changes were observed for the other metal cations used for testing at the same conditions, indicating that the sensors can selectively detect Be2+ among the studied metal ions even at higher temperatures. The spectral change in the absorption spectra of the sensors upon addition of Be2+ ion corresponds to the visible region of the spectrum, from deep green to yellow color, and this leads to observe the effect of the Be2+ ion with naked eye. The sensors used for the signaling of Be2+ ion displayed a significant shortening in response time depending on increasing t...
Source: Journal of Organometallic Chemistry - Category: Chemistry Source Type: research

Related Links:

[Malawi News Agency] Lilongwe -Ministry of Health and Population (MoH) says it is committed to adopting various measures including mass drug administration (MDA) campaigns, to eradicate Bilharzia and intestinal worms-related diseases in the country.
Source: AllAfrica News: Health and Medicine - Category: African Health Source Type: news
[This Day] Abuja -The Nigeria Medical Association (NMA) has urged the federal government to set in motion the process that will lead to renegotiation of the allowances payable to doctors in the public sector.
Source: AllAfrica News: Health and Medicine - Category: African Health Source Type: news
This study demonstrates the great potential of machine learning in electrochemical researches.Graphical abstract
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
Publication date: Available online 9 November 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Kanjana Kunpatee, Phuktra Chamsai, Eda Mehmeti, Dalibor M. Stankovic, Astrid Ortner, Kurt Kalcher, Anchalee SamphaoAbstractA sensitive and rapid method for the determination of fenobucarb by using screen-printed carbon electrode modified with graphene nanoribbons - ionic liquid - cobalt phthalocyanine (GNRs-IL-CoPc/SPCE) composites based on flow injection analysis (FIA) was developed and applied to vegetable samples. The prepared GNRs-IL-CoPc composite was characterized by Fourier transform infrared spectroscopy (FT-I...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
Publication date: Available online 9 November 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Shengyu Li, Zhengguang Zou, You Li, Yanjiao Zhang, Huanhuan ZhangAbstractVanadium oxides have been proved to be prospective nanoscale electrode materials which are being extensively explored in electrochemical. However, low cycle stability and multiplier performance have limited the commercial application of materials. To overcome this disadvantage, a rod-like LixV6O13 was synthesized by solvothermal method using LiNO3, V2O5, C2H5OH (Ethanol absolute) as raw materials. The diameter of rod-shaped LixV6O13 was between 2...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
Publication date: Available online 9 November 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Li Fu, Aiwu Wang, Huaiwei Zhang, Qingwei Zhou, Fei Chen, Weitao Su, Aimin Yu, Zhenguo Ji, Qinghua LiuAbstractAn electrochemical methodology for the determination of chicken breast meat freshness using a portable screen-printed electrode is described. Graphene sheets were introduced during meat sample preparation to enhance the electrochemical signal. The electrochemical activity profile of the meat extract shows a consistent fingerprint change during the meat decomposition process and can be used for evaluating meat f...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
Publication date: Available online 9 November 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Qinglin Xu, Xiangjun Wang, Chong XuAbstractIn order to study the Frumkin correction effect of corrosion electric field generated by 921A-B10 galvanic couple in different concentrations of NaCl solution, the electric double layer (EDL) capacitance of 921A steel and B10 copper alloy at the galvanic potential was acquired by electrochemical impedance spectroscopy (EIS), which was calculated for the experimental value of diffuse layer potential. The theoretical value of diffuse layer potential was got by the theoretical r...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
This study revealed that the PAED strategy could be used as an environmental-friendly route to fabricate and renew a high-capacity metal phosphate LIB anode.Graphical abstract
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
In this study, 2 mol% Co(NO3)2•6H2O was used as the sintering aid, GDC interlayers with 2 mol% Co(NO3)2•6H2O (Co-GDC) were sintered at 1150 °C, 1200 °C, 1250 °C and 1350 °C, respectively. The Co-GDC interlayer sintered at 1150 °C was porous, but only closed pores existed when the Co-GDC interlayers were sintering above 1250 °C. The initial ohmic resistances of the cells with Co-GDC interlayers sintered at 1150 °C, 1250 °C and 1350 °C were 0.259, 0.266 and 0.299 Ω cm2. After the cells running for 100 h, the ohmic resistances were 0.289, 0.262 an...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
Publication date: Available online 9 November 2019Source: Journal of Electroanalytical ChemistryAuthor(s): Zhijing Fu, Zhengyi Qu, Tian Yu, Lihua BiAbstractWe developed a novel way to construct the multifunctional composite films with luminescence and redox properties in this study. Firstly, the luminescent molecule HOPTS (8-hydroxypyene-1,3,6-trisulfonic acid trisodium salt) was incorporated into the silica spheres to form the green emission silica materials, HOPTS@SiO2, that were characterized by SEM (scanning electron microscope), FTIR (fourier transform infrared spectroscopy) and luminescence spectroscopy to verify the...
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
More News: Chemistry