Multianalyte azo dye as an on-site assay kit for colorimetric detection of Hg2+ions and electrochemical sensing of Zn2+ ions
摘要:
A new tailor-made colorimetric chemosensor, (E)-1-(benzo[d]thiazol-2-yl)-3-(pyridin-3-yldiazenyl)naphthalen-2-ol (1), containing benzothiazole and pyridinemoieties connected through an azo (-N=N-) linkage has been designed and synthesized. The synthesized chemosensor displayed an eye-catching color change upon binding to acetate [AcO-;colorless to russet] and mercury (II) [Hg2+;colorless to greenish blue] ions in 9:1 (v/v) aqueous CH3CN (pH 7.0 HEPES buffer).The mechanism of interaction between the chemosensor and the Hg2+/AcO- ions has been confirmed by H-1 NMR titration experiments. Moreover, the colorimetric chemosensor 1 displayed potential in-field applications as on-site assay kit and detection of Hg2+ ions in realwater samples. Importantly chemosensor 1 gave selective electrochemical response towards Zn2+ ions, enabling simple azo-dye 1 as multichannel chemosensor for colorimetric detection of Hg2+ ions and electrochemical detection of Zn2+ ions. (c) 2018 Elsevier B.V. All rights reserved.
Direct Oxygenation of C–H Bonds through Photoredox and Palladium Catalysis
作者:Sk. Sheriff Shah、Maniklal Shee、Amit Kumar Singh、Amrita Paul、N. D. Pradeep Singh
DOI:10.1021/acs.joc.9b03197
日期:2020.3.6
This report presents the oxygenation of C-H bonds via the merger of photocatalysis and Pd catalysis. Herein, we describe the utilization of a photocatalyst to oxidize an organopalladium(II) intermediate to high-valent PdIII or PdIV intermediates, which promotes the formation of C-O bonds. The demonstrated method works efficiently with various directing groups, such as oxime ether and benzothiazole
ORGANOMETALIC COMPOUNDS FOR ELECTROLUMINESCENCE AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME
申请人:Kim Hyun
公开号:US20100152455A1
公开(公告)日:2010-06-17
The present invention relates to organic electroluminescent compounds and electroluminescent devices comprising the same as host material. The electroluminescent compounds according to the invention are characterized by having three ligands, two bivalent metals and a monovalent anion derived from an inorganic or an organic acid.
Novel Green Procedure for the Synthesis of 2-Arylbenzothiazoles Under Microwave Irradiation in Peg 200 Or Peg 400
作者:Todor G. Deligeorgiev、Stefka Kaloyanova、Aleksey Vasilev、Juan J. Vaquero
DOI:10.1080/10426501003598648
日期:2010.10.28
An improved green procedure for the synthesis of 2-aryl- and 2-hetarylbenzothiazoles by condensation of equivalent amounts of 2,2′-diaminodiphenyldisulfides or 2-aminothiophenols and various aromatic aldehydes in PEG 200/400 undermicrowaveirradiation has been developed. This method allows the synthesis of 2-arylbenzothiazoles in high yields and with high purity regardless of the state of the starting
reactive probe, 1-(benzo[d]thiazol-2-yl)naphthalen-2-yl-picolinate (BTNP), was designed and synthesized. BTNP acts as a highly selective probe to Cu(2+) in DMSO/H2O (7/3, v/v, Tris-HCl 10mM, pH=7.4) solution based on Cu(2+) catalyzed hydrolysis of the picolinate ester moiety in BTNP, which leads to the formation of an ESIPT active product with dual wavelength emission enhancement. The probe also possesses
A convenient synthesis of 2-(2-(difluoromethoxy)aryl)benzo[d]thiazoles from 2- (o-hydroxyaryl)benzothiazoles and commercially available ethyl difluoroiodoacetate (ICF2CO2Et) is described. The transformation was amenable to a one-pot, sequential three-component protocol from o-hydroxybenzaldehyde, o-aminothiophenol, and ICF2CO2Et promoted by KOH. Additionally, some of the prepared compounds exhibited
描述了由2-(邻-羟基芳基)苯并噻唑和可商购的二氟碘乙酸乙酯(ICF 2 CO 2 Et)方便地合成2-(2-(二氟甲氧基)芳基)苯并[d]噻唑的方法。变换为适合于从一釜,顺序三组分协议ö羟基苯甲醛,ø -aminothiophenol,和ICF 2 CO 2的Et促进由KOH。另外,一些制备的化合物对人卵巢癌细胞显示出有希望的活性。