65373-73-1Relevant academic research and scientific papers
Boron Difluoride Adducts of a Flexidentate Pyridine-Substituted Formazanate Ligand: Property Modulation via Protonation and Coordination Chemistry
Barbon, Stephanie M.,Buddingh, Jasmine V.,Maar, Ryan R.,Gilroy, Joe B.
, p. 12003 - 12011 (2017)
The synthesis and characterization of a flexidentate pyridine-substituted formazanate ligand and its boron difluoride adducts, formed via two different coordination modes of the title ligand, are described. The first adduct adopted a structure that was typical of other boron difluoride adducts of triarylformazanate ligands and contained a free pyridine subsituent, while the second was formed via the chelation of nitrogen atoms from the formazanate backbone and the pyridine substituent. Stepwise protonation of the pydridine-functionalized adduct, which is essentially nonemissive, resulted in a significant increase in the fluorescence quantum yield up to a maximum of 18%, prompting the study of this adduct as a pH sensor. The coordination chemistry of each adduct was explored through reactions with nickel(II) bromide [NiBr2(CH3CN)2], triflate [Ni(OTf)2], and 1,1,1,4,4,4-hexafluoroacetylacetonate [Ni(hfac)2(H2O)2] salts. Coordination to nickel(II) ions altered the physical properties of the boron difluoride formazanate adducts, including red-shifted absorption maxima and less negative reduction potentials. Together, these studies have demonstrated that the physical and electronic properties of boron difluoride adducts of formazanate ligands can be readily modulated through protonation and coordination chemistry.
A class of highly effective broad-spectrum plant antimicrobial agentS
-
Paragraph 0036; 0043-0045; 0058, (2022/03/27)
The present invention relates to a class of benzohydrazone compounds and synthetic methods thereof and drugs containing the compound thereof and applications thereof. The hydrate compounds involved in the present invention have the advantages of simple structure, easy synthesis, strong antibacterial activity, wide antibacterial spectrum, small toxicity to animals and plants and low composition, and can be used as active ingredients or synergistic ingredients for the development of new high-efficiency broad-spectrum plant antibacterial agents.
Synthesis of blue light emitting heterocyclesviacyclization of 2-pyridine derived 4-azido-r1,2,3-triazoles
Tsyrenova, Biligma D.,Khrustalev, Victor N.,Nenajdenko, Valentine G.
, p. 8140 - 8152 (2021/10/04)
An efficient synthesis of 2-pyridine derived 4-azido-1,2,3-triazoles was elaborated using the corresponding dichlorodiazadienes as precursors. The reaction of the prepared 2-azine substituted diazadienes with sodium azide permits the preparation of target triazoles isolated in up to 92% yield. Subsequent thermal cyclization was studied. Elimination of molecular nitrogen promoted the cyclization of nitrene at the azine nitrogen. As a result, a family of 2H-[1,2,3]triazolo[4′,5′:3,4]pyrazolo[1,5-a]pyridin-5-ium-4-ides was prepared. The synthesized compounds are members of a new heterocyclic system. Moreover, these compounds are new attractive blue light emitting molecules.
