6410-10-2Relevant articles and documents
Silver nanoparticles as highly efficient and selective optical probe for sulphide via dendrimer formation in aqueous medium
Sanskriti, Isha,Upadhyay
, p. 14563 - 14569 (2016)
We herein report a highly efficient, cost effective, convenient as well as selective colorimetric probe for sulphide (S2-) in the form of silver nanoparticles (AgNPs) capped by an azonaphthol viz. 1-[(4-nitrophenyl)azo]-2-naphthol. A naked eye color change from bright yellow to colorless was observed upon the addition of S2- to the AgNPs. A remarkable feature of this probe is the unique morphological transition of spherical AgNPs to dendritic architecture induced by S2-. Although dendritic AgNPs have been reported previously also by many workers through various methods. Here we are presenting a probe that not only selectively recognises S2- colorimetrically but at the same time paves the way for the self-assembled dendritic structure of AgNPs. The lowest detection limit for S2- was found to be 67 nM which is much lower than the maximum endurable level (15 μM) of S2- in drinking water by World Health Organisation (WHO).
Two-Phase Electrochemical Generation of Aryldiazonium Salts: Application in Electrogenerated Copper-Catalyzed Sandmeyer Reactions
Goljani, Hamed,Tavakkoli, Zahra,Sadatnabi, Ali,Nematollahi, Davood
supporting information, p. 5920 - 5924 (2020/08/12)
The electrochemical generation of aryldiazonium salts from nitroarenes in a two-phase system (ethyl acetate/water) was reported for the first time. Some compounds including azo, azosulfone, and arylazides were prepared in good yields with good purity. Cathodically generated aryldiazoniums and anodically produced copper(Ι) ions were used to perform Sandmeyer reactions. To improve the method, an H-type self-driving cell equipped with a Zn rod as an anode was introduced and used for two-phase aryldiazonium production.
Two-photon ultra-low background fluorescent probe as well as preparation method and application thereof
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Paragraph 0062-0070; 0076-0085; 0091-0100, (2019/09/13)
The invention relates to the field of fine chemical engineering, and in particular relates to a design synthesis and application of a two-photon ultra-low background fluorescent molecular probe basedon ketene rearrangement. The synthetic method of the fluorescent probe adopts the following steps: (1) preparing NDN: adding a 2-naphthol solution into a sodium hydroxide solution, and performing treatment to obtain an anhydrous oxygen-free reagent; adding a diazonium salt into an ice bath, and performing stirring; and performing acidification, and performing drying to obtain the NDN; and (2) preparing the fluorescent probe DNHF-H2S: in the anhydrous oxygen-free environment, weighing the NDN and 2,4-dinitrofluorobenzene, adding the weighed NDN and 2,4-dinitrofluorobenzene into DMF, and performing uniform mixing; adding potassium carbonate, and performing stirring; performing heating to 40-60 DEG C, and performing a reaction; and performing cooling to room temperature, adding ice water, andperforming suction filtration to obtain the fluorescent probe. The probe provided by the invention has two-photon imaging, reduces photodamage of living biological samples and fluorophores, reduces background absorption and scattering, and improves spatial resolution and sensitivity.
