Готові списки джерел за темами / Pyrazole‐Derived Ligands

Добірка наукової літератури з теми "Pyrazole‐Derived Ligands"

Автор: Grafiati
Опубліковано: 7 вересня 2023

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Статті в журналах з теми "Pyrazole‐Derived Ligands"

1

Syahputri, Yulian, Sutanto Sutanto, and Riza Shabrina Zamzani. "Hg (II) and Cd (II) Heavy Metal Ions Detection Based On Fluorescence Using Zn (II) Metal Ion Complex with Pyrazoline Derivatives Ligand." Helium: Journal of Science and Applied Chemistry 2, no. 1 (June 30, 2022): 1–6. http://dx.doi.org/10.33751/helium.v2i1.5407.

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Pyrazoline derivatives can be used as ligands because they have photophysical properties and can chelate metal ions which cause very strong absorption, emission and have a fluorescence properties. Therefore, in recent years, pyrazoline ligands and their derivatives have been widely used for chemosensors. This research aims to detect fluorescence-based heavy metal ions Hg2+ and Cd2+ using a metal ion complex compound Zn2+ with pyrazoline derivative ligand. The research was started by synthesizing pyrazoline-derived ligands, then synthesizing complex compounds. Complex compounds were characterized using Fourier Transform Infra Red (FTIR), UV-Vis Spectrophotometer, and Spectrofluorometer. Then, a fluorescence study was carried out to determine the type of fluorosensor for complex compounds with the addition of heavy metal ions Cd2+ and Hg2+. The last stage is UV-Vis spectroscopy study on the addition of heavy metal ions Hg2+ and Cd2+. Pyrazoline derivative ligand obtained as para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazole-5-yl)benzene is a yellow solid. The metal ion complex compound Zn2+ with pyrazolin derivative ligand is a brown colored compound, has a yield of 45 % and a melting point is 245 oC. The FTIR spectrum showed the presence of functional groups such as amine, C-H aromatic, C=N, C=C aromatic, C-N, Zn-N and Zn-Cl. Analysis with UV-Vis spectrophotometer showed that there was a shift in the maximum wavelength from the ligand to the Zn(II)-ligand complex, namely 240 nm to 246 nm and 363 nm with molar absorptivity values (log ) of 4.56 and 4.28, respectively. For fluorescence analysis, two absorbance peaks were obtained, namely at a wavelength of 370 nm with an intensity of 3644 a.u and 478 m at 8216 a.u. The results of fluorescence chemosensor studies on the addition of heavy metal ions Hg2+ and Cd2+ showed that the metal ion complex compound Zn2+ with pyrazoline-derived ligands can detect heavy metal ions Hg2+ and Cd2+ with a turn-on type.
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2

Petrović, A. F., S. R. Lukić, D. M. Petrović, E. Z. Ivegeš, and V. M. Leovac. "Metal complexes with pyrazole-derived ligands." Journal of Thermal Analysis 47, no. 3 (September 1996): 879–86. http://dx.doi.org/10.1007/bf01981822.

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3

Popov, Sergey A., Yuri V. Gatilov, Tatjana V. Rybalova, Oxana A. Kholdeeva, and Alexey V. Tkachev. "Novel optically active pyrazole ligands derived from (+)-3-carene." Tetrahedron: Asymmetry 12, no. 20 (November 2001): 2875–81. http://dx.doi.org/10.1016/s0957-4166(01)00477-3.

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4

Watson, AA, DA House, and PJ Steel. "Chiral Heterocyclic Ligands. VIII. Syntheses and Complexes of New Chelating Ligands Derived From Camphor." Australian Journal of Chemistry 48, no. 9 (1995): 1549. http://dx.doi.org/10.1071/ch9951549.

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The syntheses of 23 new chelating ligands are described. Most of these ligands are derived from the chiral pyrazole (1) which has been linked to a variety of heterocycles , namely pyridine, pyrimidine, pyridazine, isoxazole , benzimidazole, thiophen and furan. In certain cases the parent achiral analogues have also been prepared. Preliminary studies of the coordination chemistry of these ligands with selected transition metals have been carried out. The X-ray crystal structures of palladium complexes of isoxazole- and thiophen-containing ligands have also been determined.
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5

Pellei, Maura, Valentina Gandin, Luciano Marchiò, Cristina Marzano, Luca Bagnarelli, and Carlo Santini. "Syntheses and Biological Studies of Cu(II) Complexes Bearing Bis(pyrazol-1-yl)- and Bis(triazol-1-yl)-acetato Heteroscorpionate Ligands." Molecules 24, no. 9 (May 7, 2019): 1761. http://dx.doi.org/10.3390/molecules24091761.

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Copper(II) complexes of bis(pyrazol-1-yl)- and bis(triazol-1-yl)-acetate heteroscorpionate ligands have been synthesized. The copper(II) complexes [HC(COOH)(pzMe2)2]Cu[HC(COO)(pzMe2)2]·ClO4, [HC(COOH)(pz)2]2Cu(ClO4)2 (pzMe2 = 3,5-dimethylpyrazole; pz = pyrazole) were prepared by the reaction of Cu(ClO4)2·6H2O with bis(3,5-dimethylpyrazol-1-yl)acetic acid (HC(COOH)(pzMe2)2) and bis(pyrazol-1-yl)acetic acid (HC(COOH)(pz)2) ligands in ethanol solution. The copper(II) complex [HC(COOH)(tz)2]2Cu(ClO4)2·CH3OH (tz = 1,2,4-triazole) was prepared by the reaction of Cu(ClO4)2·6H2O with bis(1,2,4-triazol-1-yl)acetic acid (HC(COOH)(tz)2) ligand in methanol solution. The synthesized Cu(II) complexes, as well as the corresponding uncoordinated ligands, were evaluated for their cytotoxic activity in monolayer and 3D spheroid cancer cell cultures with different Pt(II)-sensitivity. The results showed that [HC(COOH)(pzMe2)2]Cu[HC(COO)(pzMe2)2]·ClO4 was active against cancer cell lines derived from solid tumors at low IC50 and this effect was retained in the spheroid model. Structure and ultra-structure changes of treated cancer cells analyzed by Transmission Electron Microscopy (TEM) highlighted the induction of a cytoplasmic vacuolization, thus suggesting paraptotic-like cancer cell death triggering.
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6

Fonseca, Daniela, Sandra M. Leal-Pinto, Martha V. Roa-Cordero, José D. Vargas, Erika M. Moreno-Moreno, Mario A. Macías, Leopoldo Suescun, Álvaro Muñoz-Castro, and John J. Hurtado. "Inhibition of C. albicans Dimorphic Switch by Cobalt(II) Complexes with Ligands Derived from Pyrazoles and Dinitrobenzoate: Synthesis, Characterization and Biological Activity." International Journal of Molecular Sciences 20, no. 13 (July 1, 2019): 3237. http://dx.doi.org/10.3390/ijms20133237.

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Seven cobalt(II) complexes of pyrazole derivatives and dinitrobenzoate ligands were synthesized and characterized. The single-crystal X-ray diffraction structure was determined for one of the ligands and one of the complexes. The analysis and spectral data showed that all the cobalt complexes had octahedral geometries, which was supported by DFT calculations. The complexes and their free ligands were evaluated against fungal strains of Candida albicans and emerging non-albicans species and epimastigotes of Trypanosoma cruzi. We obtained antifungal activity with a minimum inhibitory concentration (MIC) ranging from 31.3 to 250 µg mL−1. The complexes were more active against C. krusei, showing MIC values between 31.25 and 62.5 µg mL−1. In addition, some ligands (L1–L6) and complexes (5 and Co(OAc)2 · 4H2O) significantly reduced the yeast to hypha transition of C. albicans at 500 µg mL−1 (inhibition ranging from 30 to 54%). Finally, the complexes and ligands did not present trypanocidal activity and were not toxic to Vero cells. Our results suggest that complexes of cobalt(II) with ligands derived from pyrazoles and dinitrobenzoate may be an attractive alternative for the treatment of diseases caused by fungi, especially because they target one of the most important virulence factors of C. albicans.
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7

Orabi, Adel S. "Preparation and applications of some complexes derived from lanthanon(III) ions with some ligands derived from pyrazole." Macedonian Journal of Chemistry and Chemical Engineering 32, no. 1 (June 15, 2013): 25. http://dx.doi.org/10.20450/mjcce.2013.123.

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The novel complexes derived from some pyrazole derivatives ligands: 2,4-dihydroxybenzylidene-3`-imino-5`-methylpyrazole(L1); salicylidene-3`-imino-5`-methylpyrazole(L2); 2-hydroxynaphthylidene-3`-imino-5`-methylpyrazole(L3) and LaCl3, Ce(NO3)3 and Nd(NO3)3 were prepared and characterized using elemental analysis (C, H, N, M%), mass, FT-IR spectroscopy, electrical conductivity and thermal gravimetric analysis (DTA/TG). The electrical conductivity of 0.001M in DMSO revealed the electrolytic behavior of the all formed complexes as 1:1 (coordination sphere cation : ionization sphere ions) electrolyte for complexes derived from L1 and L2 ligands meanwhile L3 gave 1:2 electrolyte. The thermal analysis (DTA/TG) of the synthesized complexes revealed the presence of two types of water molecules as water of crystallization and coordinated one which act as a ligand. The complexes formed could be formulated as [M(L)2.nH2O].Z.mH2O for L = L1 and L2, [M(L).nH2O].2Z.mH2O for L = L3 (Z = Cl- for M = La(III) and Z = NO3- for M = Ce(III) and Nd(III)). Nd(III)-L3 complexe exhibit promising catalytic activity towards the aerobic oxidation of p-phenylenediamine (PPD) to the corresponding semi-oxidized form (PPD+). The antimicrobial activity of the complexes under investigations was tested and discussed. The simulated molecular structure and the energy of the formed complexes were performed using chem.-office package program. The relation between the spatial arrangement of the formed complexes and its antimicrobial activity was evaluated.
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8

Pons, J., F. J. Sánchez, A. Labarta, J. Casabó, F. Teixidor, and A. Caubet. "Mixed bridged, dinuclear copper(II) complexes with dinucleating, pyrazole derived ligands." Inorganica Chimica Acta 208, no. 2 (June 1993): 167–71. http://dx.doi.org/10.1016/s0020-1693(00)85117-8.

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9

Han, Yuan, Li Juan Lee, and Han Vinh Huynh. "Pyrazole-Derived Remote Dicarbenes: Versatile Ligands for Di- and Tetranuclear Complexes." Chemistry - A European Journal 16, no. 3 (November 24, 2009): 771–73. http://dx.doi.org/10.1002/chem.200902737.

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10

Rimola, Albert, Mariona Sodupe, Josep Ros, and Josefina Pons. "A Theoretical Study on PdII Complexes Containing Hemilabile Pyrazole-Derived Ligands." European Journal of Inorganic Chemistry 2006, no. 2 (January 2006): 447–54. http://dx.doi.org/10.1002/ejic.200500794.

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Дисертації з теми "Pyrazole‐Derived Ligands"

1

Lawrence, Sally. "Early transition metal complexes of pyrazole-derived ligands." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433560.

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2

Joshi, V. S. "Synthesis and structure of new organomolybdenum complexes containing pyrazole-derived ligands." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 1993. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3069.

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3

周張銓. "The study of model complexes of tyrosinase:synthesis, structure and reactivity of Cu(I) complexes with pyrazole derived bidentate ligands." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/83090165290144461455.

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4

Wu, Sih-Ting, and 吳思婷. "Synthesis, Structures, and Photophysical Properties of Dinuclear Platinum Complexes derived from C^C^C-Pincer Bis(carbene) Ligand with Pyrazole Bridging Ligand." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/38812354818444411051.

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5

Che-WeiChang and 張哲維. "A Study on Synthesis, Structure and Properties of Cadium(Ⅱ) and Znic(Ⅱ) Complexes Containing pyrazole-derived ligand." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/39345931625839406526.

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6

Jhong, Cyong-Ying, and 鍾瓊瑩. "Synthesis, structures and characterization of metal complexes derived from pyrazine/N-heterocyclic carbene ligand." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/17427226413516560248.

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Частини книг з теми "Pyrazole‐Derived Ligands"

1

Trofimenko, S. "The Coordination Chemistry of Pyrazole-Derived Ligands." In Progress in Inorganic Chemistry, 115–210. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470166352.ch3.

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2

Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with pyrazole derived ligand." In Magnetic Properties of Paramagnetic Compounds, 451–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53974-3_236.

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3

Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with pyrazole derived ligand." In Magnetic Properties of Paramagnetic Compounds, 453–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53974-3_237.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with pyrazole derived ligand." In Magnetic Properties of Paramagnetic Compounds, 455–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53974-3_238.

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5

Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with pyrazole derived ligand." In Magnetic Properties of Paramagnetic Compounds, 457–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53974-3_239.

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6

Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with pyrazole derived ligand." In Magnetic Properties of Paramagnetic Compounds, 459–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53974-3_240.

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7

Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with pyrazole derived ligand." In Magnetic Properties of Paramagnetic Compounds, 461–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53974-3_241.

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8

Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with heterocyclic Schiff-base ligand derived from pyrazolone and thiosemicarbazide." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 8, 1057–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66460-5_387.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with heterocyclic Schiff-base ligand derived from pyrazolone and thiosemicarbazide." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 8, 1063–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66460-5_389.

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10

Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with heterocyclic Schiff-base ligand derived from pyrazolone and semicarbazide." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 8, 1060–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66460-5_388.

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