- A highly sensitive and selective schiff base fluorescent chemodosimeter for aluminum(III)
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A fluorescent probe for Al3+, 4-(1'-phenyl-3'-methyl-5'- hydroxypyrazole)-1-acetone-(2'-hydroxybenzoyl) hydrazone (L), was prepared through a simple synthetic route. The fluorescent probe can detect Al 3+ ions sensitively, in ethanol
- Cheng, Xiao-Ying,Wang, Ming-Fang,Yang, Zheng-Yin,Li, Yong,Li, Tian-Rong,Liu, Chun-Jiao,Zhou, Qiao-Xia
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Read Online
- Synthesis and characterization of a series of acylpyrazolone transition metal complexes: Crystal structures and catalytic performance in the epoxidation of cyclooctene
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A series of transition metal complexes of 4-acetyl-3-methyl-1-phenyl-2-pyrazoline-5-one with Ni(II), Cu(II), Fe(III) and Mn (II) central metal ions have been synthesized and characterized by X-ray crystallography, UV–Vis and FTIR spectroscopy, and element
- Behzad, Mahdi,Dusek, Michal,Hasanzadeh Esfahani, Maryam,Kucerakova, Monika
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Read Online
- Two Schiff-base fluorescent sensors for selective sensing of aluminum (III): Experimental and computational studies
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Two Schiff-base fluorescent sensors have been synthesized, which both can act as fluorescent probes for Al3+, upon addition of Al3+, they exhibit a large fluorescence enhancement which might be attributed to the formation of 1:1 liga
- Qin, Jing-Can,Cheng, Xiao-Ying,Fang, Ran,Wang, Ming-Fang,Yang, Zheng-Yin,Li, Tian-Rong,Li, Yong
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Read Online
- Nitric oxide functionalized molybdenum(0) pyrazolone Schiff base complexes: Thermal and biochemical study
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This work describes the synthesis and characterization of three molybdenum dinitrosyl Schiff base complexes of the general formula [Mo(NO)2(L)(OH)], where L is N-(dehydroacetic acid)-4-aminoantipyrene (dha-aapH), N-(4-acetylidene-3-methyl-1-phe
- Mir, Jan Mohammad,Maurya, Ram Charitra
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p. 35102 - 35130
(2018/10/24)
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- Synthesis and luminescence properties of pyrazolone derivatives and their terbium complexes
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Seven novel pyrazolone derivatives were synthesized and characterized by 1H NMR and 13C NMR spectra, mass spectra, infrared spectra and elemental analysis. Their terbium complexes were prepared and characterized by elemental analysis, EDTA titrimetric analysis, UV/vis spectra, infrared spectra and molar conductivity, as well as thermal analysis. The fluorescence properties and fluorescence quantum yields of the complexes were investigated at room temperature. The results indicated that pyrazolone derivatives had good energy-transfer efficiency for the terbium ion. All the terbium complexes emitted green fluorescence characteristic of terbium ions, possessed strong fluorescence intensity, and showed relatively high fluorescence quantum yields. Cyclic voltammograms of the terbium complexes were studied and the highest occupied molecular orbital (HOMO) and lowest occupied molecular orbital (LUMO) energy levels of these complexes were estimated.
- Xiao, Haihua,Jiang, Xi,Li, Dong,Wu, Limin,Zhang, Wu,Guo, Dongcai
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p. 677 - 685
(2015/12/04)
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- Iodobenzene diacetate-mediated isomerization of pyrazolyl chalcones and their cytotoxicity and anti-microbial activity
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Synthesis of cis (E)-1-(5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)-3-phenyl/aryl/heteroarylprop-2-en-1-ones from 1-phenyl-3-methyl-4-acetylpyrazol-5-one was achieved in good yield. s-cis (E)-1-(5-Hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)-3-arylprop-2-e
- Parshad, Mahavir,Verma, Vikas,Kumar, Devinder,Narasimhan, Balasubramanian,Kour, Smit,Singh, Shashank,Sangwan, Payare Lal
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p. 413 - 423
(2015/05/13)
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- Zn(II) coordination compounds derived from 4-acyl pyrazolones and 1,10 phenanthroline: Syntheses, crystal structures, spectral analysis and DNA binding studies
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A new series of three Zn(II) coordination complexes [Zn(MCPMPAC) 2H2O] = complex 1, [Zn(PMPAC)2H2-O] = complex 2 and [Zn(PMPAC)2(phen)] = complex 3 (MCPMPAC = 4-acyl-3-methyl-1-(3-chlorophenyl) pyrazolone-5-one, PMPAC = 4-acyl-3-methyl-1-phenyl pyrazolone-5-one, Phen=1,10 phenanthroline) has been synthesized and characterized. The structural features of synthesized complexes were determined by metal estimation, molar conductivity, IR, UV-Vis, NMR and single crystal X-ray study. The conductivity data confirm the non-electrolytic nature of the complexes. The single crystal analyses of the complexes show that the Zn(II) ion is five-coordinated with water molecule at axial position in case of 1 and 2 whereas, six-coordinated with phenanthroline ligand in case of 3. Binding of the synthesized complexes with calf thymus DNA (CT-DNA) was studied by spectroscopic methods and viscosity measurements. Experimental results suggest that the zinc complexes have the ability to form adducts with DNA and to distort the double helix by changing the base stacking.
- Jadeja,Chhatrola, Mitesh,Gupta, Vivek K.
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p. 117 - 126
(2013/10/22)
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- MELDRUM 'S ACID, BARBITURIC ACID AND PYRAZOLONE DERIVATIVES SUBSTITUTED WITH HYDROXYLAMINE AS HNO DONORS
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The disclosed subject matter provides certain N-substituted hydroxylamine derivative compounds, pharmaceutical compositions and kits comprising such compounds, and methods of using such compounds or pharmaceutical compositions. In particular, the disclosed subject matter provides methods of using such compounds or pharmaceutical compositions for treating, preventing, or delaying the onset and/or development of a disease or condition. In some embodiments, the disease or condition is selected from cardiovascular diseases, ischemia, reperfusion injury, cancerous disease, pulmonary hypertension and conditions responsive to nitroxyl therapy.
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Page/Page column 38
(2013/05/09)
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- Synthesis, characterization of some metal complexes of 4-acetylsemicarbazone-1-phenyl-3-methyl-2-pyrazolin-5-one
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4-Acetylsemicarbazone-1-phenyl-3-methyl-2-pyrazolin-5-one (AMP-SC) was prepared and its metal chelates of Cu2+, Ni2+, Co2+, Mn2+, Fe2+, Fe3+, Cr3+, UO22+ an
- Patel,Shah
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experimental part
p. 3069 - 3075
(2010/11/04)
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- Synthesis and the luminescent study of the iridium complexes containing 2,3-diphenylquinoline derivatives and the new ancillary ligand for OLED
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We previously reported that Ir(6-F-2,3-dpqx-(OMe)2) 2(acac) (6-F-2,3-dpqx-(OMe)2=6-fluoro-2,3-bis(4- methoxylphenyl)quinoxaline) exhibited photoluminescence(PL) and electroluminescence (EL) emission at 645 and 667nm, respectively. To modulate the emission maxima toward the saturated red chromacity, a new main ligand and its iridium complexes were prepared, and their photophysical properties were investigated. As a main ligand, 6-OMe-2,3-dpqx-(OMe)2 (6-OMe-2,3-dpqx-(OMe)2=6-methoxy-2,3-bis(4-methoxylphenyl) quinoxaline), were designed and synthesized. Acetylacetonate (acac) and pyrazolonates (przls) were also chelated to the iridium center as an ancillary ligand. The resulting complexes prepared herein were Ir(6-OMe-2,3-dpqx-(OMe) 2)2(acac), Ir(6-OMe-2,3-dpqx-(OMe)2) 2(przl1) and Ir(6-OMe-2,3-dpqx-(OMe)2)2(przl2). The photoluminescence (PL) of these complexes were observed around 660nm, and their electroluminescence maxima were observed around 650nm. The PL investigation of the complexes in PMMA (PMMA=poly(methylmetacrylate)) for the polymer solution process revealed that the emission peaks became broader with the range of 600~850nm than those of the complexes only.
- Lee, Hyun-Shin,Ahn, So Youn,Ha, Yunkyoung
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experimental part
p. 14 - 24
(2010/07/14)
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- Neutral dioxovanadium(V) complexes of biomimetic hydrazones ONO donor ligands of bioinorganic and medicinal relevance: Synthesis via air oxidation of bis(acetylaceto-nato)oxovanadium(IV), characterization, biological activity and 3D molecular modeling
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The interaction of bis(acetylacetonato)oxovanadium(IV), [VO(acac)2] with biomimetic hydrazone ONO donor ligands HL in 1:1 mole ratio [where, HL = N-(4′-benzoylidene-3′-methyl-1′-phenyl-2′-pyrazolin-5′-one)-isonicotinic acid hydrazide (bmphp-inH, I), N-(4′-butyrylidene-3′-methyl-1′-phenyl-2′-pyrazolin-5′-one)-isonicotinic acid hydrazide (bumphp-inH, II), N-(4′-acetylidene-3′-methyl-1′-phenyl-2′-pyrazolin-5′-one)-isonicotinic acid hydrazide (amphp-inH, III), N-(3′-methyl-1′-phenyl-4′-propionylidene-2′-pyrazolin-5′-one)-isonicotinic acid hydrazide (mphpp-inH, IV) and N-(4′-iso-butyrylidene-3′-methyl-1′-phenyl-2′-pyrazolin-5′-one)-isonicotinic acid hydrazide (iso-bumphp-inH, V)] in a mixed solvent (ethanol-methanol, 1:10) via aerial oxidation for 2-3 days yield dioxovanadium(V) complexes of composition [VO2(L)(H2O)] · H2O. The compounds so obtained were characterized on the basis of elemental analyses, thermogravimetry, vanadium determination, IR, Electronic, 51V NMR, 1H NMR and mass spectral studies. The 3D molecular modeling and analysis for bond lengths and bond angles have also been carried out for one of the representative compounds, [VO2(ampph-in)(H2O)] (3).
- Maurya,Rajput
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p. 133 - 144
(2008/10/09)
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- Metal nitrosyl complexes of bioinorganic, catalytic, and environmental relevance: A novel single-step synthesis of dinitrosylmolybdenum(0) complexes of {Mo(NO)2}6 electron configuration involving Schiff bases derived from 4-acyl-3-methyl-1-phenyl-2-pyrazolin-5-one and 4-aminoantipyrine, directly from molybdate(VI) and their characterization
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This paper reports the synthesis of five new hexa-coordinated mixed-ligand dinitrosyl complexes of molybdenum(0) of the composition [Mo(NO)2(L)(OH)], where LH = N-(3′-methyl-1′-phenyl-4′-valerylidene-2′-pyrazolin-5′-one)-4-aminoantipyrine (mphvp-aapH), N-(4′-benzoylidene-3′-methyl-1′-phenyl-2 ′-pyrazolin-5′-one)-4-aminoantipyrine (bmphp-aapH), N-(3′-methyl-1′-phenyl-4′-propionylidene-2′-pyrazolin-5′-one)-4-aminoantipyrine (mphpp-aapH), N-(4′-acetylidene-3′-methyl-1′-phenyl-2′-pyrazolin-5 ′-one)-4-aminoantipyrine (amphp-aapH) or N-(-4′-iso-butyrylidene-3′-methyl-1′-phenyl-2′-pyrazolin-5′-one)-4-aminoantipyrine (iso-bumphp-aapH) directly from molybdate (VI) in a single step and in a single pot. The compounds so obtained have been characterized by elemental analyses, molar conductance, decomposition temperature and magnetic measurements, thermogravimetric analyses, infrared and electronic spectral studies. They were found to contain low-spin [Mo(NO)2]6 electron configuration. A cis-octahedral structure has been proposed for these complexes. The 3D molecular modeling and analysis for bond lengths and bond angles have also been carried out for one of the representative compounds, [Mo(NO)2(bmphp-aap)(OH)] (2).
- Maurya,Pandey,Chaurasia,Martin
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