14128-73-5Relevant articles and documents
Sonoelectrochemical Synthesis of Nano Zinc(II) Complex with 2-Methyl-8-Hydroxyquinoline Ligand: a Precursor to Produce Pure Phase Nano-Sized Zinc(II) Oxide
Jodaian, Vida,Shahrjerdi, Akram,Mirahmadpour, Pari
, p. 715 - 722 (2017)
A new zinc complex, [Zn(mq)2], (mq?=?2-methyl-8-hydroxyquinoline) was prepared via an electrochemical route from the oxidation of zinc metal in the presence of 2-methyl-8-hydroxyquinoline in a fast and facile process. The complex was fully characterized by means of NMR and IR spectra and elemental analysis. The nanostructure of the prepared compound was obtained by sonoelectrochemical process and studied by scanning electron microscopy, X-ray powder diffraction, IR spectroscopy and elemental analysis. Thermal stability of crystalline bulk and nano-size samples of the prepared compound was studied by thermal gravimetric and differential thermal analysis. The photoluminescence properties of the prepared compounds, as crystalline bulk and as nano-structure, have been investigated. The results showed a good correlation between the size and the shape of the complex particle and emission wavelength. The prepared complexes, as bulk and as nano-particles, were utilized as a precursor for preparation of ZnO nanoparticles by direct thermal decomposition at 550?°C in air. The nano-structures of ZnO were characterized by scanning electron microscopy, X-ray powder diffraction and IR spectroscopy.
Theoretical and experimental studies on the fluorescence properties of aluminum(III), cadmium(II), zinc(II), and copper(II) complexes of substituted 8-hydroxyquinoline
Hongli, Chen,Hongrui, Cheng,Menglin, Ma,Qingrong, Sun,Weiqing, Yang,Yuanyuan, Zhang
, p. 623 - 634 (2020/12/14)
Fifty-five 8-hydroxyquinoline (8-HQ) derivatives are synthesized and the corresponding aluminum(III), cadmium(II), copper(II), and zinc(II) metal complexes are prepared and their fluorescent activities are evaluated. The results indicate that the aluminum complexes have the best fluorescence properties, followed by zinc and cadmium complexes, while almost no fluorescence is observed with the copper complexes. The relationship between the fluorescence properties and complex structure is summarized and a predictive three-dimensional quantitative structure–property relationship model is established using the multifit molecular alignment rule of Sybyl program. With the introduction of groups at the C-2 position or electron-withdrawing groups to the 8-hydroxyquinoline framework, fluorescence wavelength blue shifts are observed with the zinc, aluminum, and cadmium complexes. At the same time, a red shift of the fluorescence emission wavelength is detected for the aluminum and zinc complexes when C-5 of 8-hydroxyquinoline was substituted with halogens or a methyl group. Moreover, the zinc, cadmium, and aluminum complexes with 2,4-dimethyl substituents on the 8-hydroxyquinoline all show good fluorescence properties. The highest occupied molecular orbital and lowest unoccupied molecular orbital energies of the complexes are also calculated and the fluorescence properties of the metal complexes are analyzed from the viewpoint of molecular orbitals.
Design, synthesis, and antifungal evaluation of 8-hydroxyquinoline metal complexes against phytopathogenic fungi
Chen, Yong-Jia,Liu, Ying-Qian,Ma, Kun-Yuan,Shang, Xiao-Fei,Sun, Yu,Wang, Ren-Xuan,Wang, Yu-Ling,Yin, Xiao-Dan,Zhao, Zhong-Min,Zhu, Jia-Kai
, p. 11096 - 11104 (2020/11/09)
Phytopathogenic fungal infections have become a major threat to agricultural production, food security, and human health globally, and novel antifungal agents with simple chemical scaffolds and high efficiency are needed. In this study, we designed and synthesized 38 8-hydroxyquinoline metal complexes and evaluated their antifungal activities. The results showed that most of the tested compounds possessed remarkable in vitro antifungal activity. Especially, compound 1e exhibited the highest antifungal potency among all target compounds, with EC50 values of 0.0940, 0.125, 2.95, and 5.96 μg/mL, respectively, against Sclerotinia sclerotiorum, Botrytis cinerea, Fusarium graminearum, and Magnaporthe oryzae. Preliminary mechanistic studies had shown that compound 1e might cause mycelial abnormalities of S. sclerotiorum, cell membrane permeability changes, leakage of cell contents, and inhibition of sclerotia formation and germination. Moreover, the results of in vivo antifungal activity of compound 1e against S. sclerotiorum showed that 1e possessed higher curative effects than that of the positive control azoxystrobin. Therefore, compound 1e is expected to be a novel leading structure for the development of new antifungal agents.
Preparation of 8-hydroxyquinoline complexes and application of 8-hydroxyquinoline complexes in prevention and treatment of plant diseases
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Paragraph 0017-0026, (2020/11/25)
The invention relates to the technical field of chemical pesticides, and discloses application of any compound of 8-hydroxyquinoline zinc complexes (Ya)-(Yj) in preparation of drugs for preventing orresisting sclerotinia rot of colza, botrytis cinerea, wheat scab and rice blast. Due to the fact that 8-hydroxyquinoline has wide biological activity, the complexes show huge potential in an antifungal aspect, and elemental zinc (Zn) has good bactericidal performance. The 8-hydroxyquinoline zinc complexes organically combine the biological activity of 8-hydroxyquinoline and the biological activity of Zn, and an activity test shows that the complexes show remarkable antibacterial activity can be developed as agricultural bactericides.
Organic light-emitting element and display apparatus
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Page/Page column 91; 94, (2020/04/26)
Provided is an organic light-emitting element having high luminous efficiency and a long lifetime. The organic light-emitting element includes a pair of electrodes and an organic compound layer placed between the pair of electrodes, in which the organic compound layer includes an iridium complex having a benzo[f]isoquinoline of a specific structure as a ligand and a metal complex compound of a specific structure.
Study on Relationship Between Fluorescence Properties and Structure of Substituted 8-Hydroxyquinoline Zinc Complexes
Jianbo, He,Tingting, Zhou,Yongjing, Cao,Yuanyuan, Zhang,Weiqing, Yang,Menglin, Ma
, p. 1121 - 1126 (2018/08/17)
Organic light-emitting diodes (OLEDs) produced from 8-hydroxyquinoline metal complexes play a vital role in modern electroluminescent devices. In this manuscript, a series of 8-hydroxyquinoline derivatives were synthesized by different methods and their corresponding zinc metal complexes were prepared. The UV and fluorescence properties of the complexes were measured aiming to understand the effect of substituents at the quinoline ring on the fluorescence properties of the complexes. When the C-5 of 8-hydroxyquinoline was replaced by halogen group, the fluorescence emission wavelengths had been red-shifted, at the same time, blue-shifted of fluorescence emission wavelength was observed when the C-5 position of 8-hydroxyquinoline was substituted by electron-withdrawing group. When the C-4 position of 8-hydroxyquinolie was substituted by methyl or the C-5 position was substituted by sulfonic acid group, the corresponding zinc complexes had higher fluorescence intensity than 8-hydroxyquinolie zinc.
Adduct Formation Constants of Some Zinc(II) Chelates of 8-Quinolinols With Heterocyclic Nitrogen Bases
Rane, Arvind T.,Nepali, Deepawati R.
, p. 158 - 160 (2007/10/02)
Adduct formation constants of Zn(II)-8-hydroxyquinolinates with some heterocyclic bases have been determined spectrophotometrically.Monoadducts are formed with all the Zn(II)-8-quinolinates.The stabilities of the zinc adducts increase in the following order of the bases: 2-picoline 2,4-lutidine 2,4,6-collidine pyridine 4-picoline 2,9-neocuproin 2,2'-bipyridyl 1,10-phenanthroline.
