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Phthalocyanine derivatives

Tìm thấy 12+ kết quả cho từ khóa "Phthalocyanine derivatives"

Nature of second-order nonlinear optical response in phthalocyanine derivatives: a density functional theory study

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Nature of second-order nonlinear optical response in phthalocyanine derivatives:. a density functional theory study. Abstract: Density functional theory was employed to investigate a series of phthalocyanine derivatives, discovering the limitation when the expansion of the conjugated system was employed to improve the hyper-Rayleigh scattering response coefficient.

Synthesis of metal-free and metallophthalocyanines containing 18- and 21-membered macrocycles with mixed donor atoms and their metal-ion binding properties

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In the case of phthalocyanine derivatives 2b–2d, 3b–3d, and 4b–4d, which are substituted by four 18-, 19-, and 21-membered macrocycles with N 2 S 4 donor atoms, respectively (Scheme 3), they all have the same phthalocyanine skeleton substituted different ring-sized macrocycles at peripheral positions. 55 The Q band position for these structurally related phthalocyanine derivatives was observed at around 740 nm for metal-free phthalocyanines, 690 nm for cobalt(II) phthalocyanines, and 710 nm for zinc

Synthesis and spectral and thermal characterization of new metal-free and metallophthalocyanines: investigation of their photophysical, photochemical, and thin film properties

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The significant difference is the presence of γ (N-H) vibrations of the inner phthalocyanine core protons, which are assigned to a weak band at 3280 cm − 1 for metal-free derivatives. This band disappeared in the IR spectra of the metallophthalocyanines. This band is especially beneficial for characterization of metal-free phthalocyanine derivatives. The NMR spectra of metallophthalocyanine compounds were similar to those of the precursor phthalonitrile compound 1.

Synthesis and spectroscopic characterization of new phthalocyanine derivatives: application as photocatalysts for the degradation of Orange G

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Fabrication of phthalocyanine-magnetic nanoparticles hybrid nanofibers for degradation of Orange-G. Journal of Molecular Catalysis A: Chemical 2014

Novel nonperipheral octa-3-hydroxypropylthio substituted metallo-phthalocyanines: Synthesis, characterization, and investigation of their electrochemical, photochemical and computational properties

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The synthesis of the phthalocyanine compounds bearing different alkylthio groups on the phthalocyanine ring were given in the literature but the photochemical properties of these derivatives were studied limitedly. On the other hand, the phthalocyanine derivatives substituted at the nonperipheral octa positions of the phthalocyanine macrocycle are very rare in the literature.

Bisbenzoxazole derivatives had an antiinflammatory effect on in vitro stimulated macrophages

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Immunostimulatory effect of zinc phthalocyanine derivatives on macrophages based on the pro-inflammatory TNFα and IL1 β cytokine production levels. British Journal of Nutrition 2007. Why cancer and inflammation Yale Journal of Biology and Medicine 2006. Journal of the Turkish Chemical Society, Section A: Chemistry 2018. Asian Journal of Chemistry 2007. Journal of Chemical and Pharmaceutical Research 2013.

Liquid state 15N NMR studies of 15N isotope labeled phthalocyanines

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Tetra-tert-butyl substituted phthalocyanine derivatives have been studied intensively in the literature. 13 Most of the synthetic work was described starting from dinitril derivatives, but there are also some starting from anhydride derivative using urea as the nitrogen source. 14 In order to obtain the desired 15 N labeled molecules, we synthesized tetra-tert-butyl Zn(II) and Ni(II) phthalocyanines starting from 4-tert-butylphthalic anhydride using 98% 15 N enriched urea, which is commercially available

Synthesis of quaternized zinc(II) and cobalt(II) phthalocyanines bearing pyridine-2-yl-ethynyl groups and their DNA binding properties

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Aggregation behavior of zinc phthalocyanine derivatives (1, 3, 5) in DMF at different concentrations:. Aggregation behavior of cobalt phthalocyanine derivatives (2, 4, 6) in DMF at different concentrations:. The spectral changes in UV-Vis absorption spectrum of Q-ZnPc M) in buffer solution upon addition of DNA M): a) 0 M.

Synthesis and characterization of tetra-substituted titanium(IV) phthalocyanines with axial ligand

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The purification procedure of all phthalocyanine derivatives was completed by preparative chromatography over silica gel using CH 2 Cl 2 :MeOH as eluent. The product was then hydrolyzed using 20% NaOH solution. 48 However, these types of phthalocyanines (1c and 3c) were obtained in low yields (4% and 1.6%, respectively).. The characterization of the new products involved a combination of methods including elemental analyses, IR, UV-Vis, 1 H NMR, and MALDI-TOF mass spectroscopy.

Diphenylethoxy-substituted metal-free and metallophthalocyanines as potential photosensitizer for photodynamic therapy: synthesis and photophysical and photochemical properties

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Singlet oxygen quantum yields. determinations were performed as described in the literature. 35,36 Typically, a 3-mL portion of the phthalocyanine derivatives (absorbance. 1.5 at irradiation wavelength) containing the singlet oxygen quencher was irradiated in the Q band region with the photoirradiation set-up described in the literature. 35,36 Singlet oxygen quantum yields ( Φ.

Characterization and purification of 1,2,4-triazole-containing phthalocyanines synthesized by microwave method and structure elucidation by spectroscopic techniques

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Abstract: The complexes of peripherally tetra-substituted metal-free (8), lead(II) (9), and zinc(II) (10) phthalocyanine derivatives were synthesized for the first time in this work.

Novel metal-free and metallophthalocyanines containing four 21-membered pentathiadiaza macrocycles: synthesis, characterization, and study of aggregation properties

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Abstract: Metal-free phthalocyanine 3 and its metallophthalocyanine derivatives 4, 5, and 6 (M = Zn, Co, and Ni) sub- stituted with four 21-membered pentathiadiaza macrocycles were synthesized and their structures identified by elemental analysis, IR, 1 H NMR, mass, and UV-Vis spectroscopy techniques. The aggregation properties of phthalocyanines 4, 5, and 6 were investigated in different solvents and at different concentrations of dimethylformamide..

A phthalocyanine–fluorescein conjugate

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Keeping the glycerol substitution basis, we designed the fluorescein–phthalocyanine conjugate 1 (Scheme), likely to combine the photoproperties of both derivatives: the fluorescence imaging provided by the fluorescein moiety at its own excitation wavelengths and the photodynamic activity of the phthalocyanine part, resulting in enhanced flexibility for the imaging excitation wavelengths.. CuBr CH 2 Cl 2. Preparation of phthalocyanine–fluorescein conjugate 1..

Synthesis and characterization of novel unsymmetrical phthalocyanine/TiO2 composites and their evaluation as photocatalysts for degradation of 4-chlorophenol under visible light

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We synthesized A 3 B-type phthalocyanines (nonsymmetrical phthalocyanine) by using different phthalonitrile derivatives to anchor on TiO 2 semiconductor. 19 In statistical condensation, if two different phthalonitriles with similar reactivity are condensed in a 3:1 ratio, the following mixture of isomers will be obtained: 33% of A 4 , 44% of A 3 B, and 23% of A 2 B 2 and AB 3 , both of which are the cross-condensation products.

Investigation of the photophysical and photochemical behavior of substituted zinc phthalocyanines and their water-soluble quaternized derivatives

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Investigation of the photophysical and photochemical behavior of substituted zinc phthalocyanines and their water-soluble quaternized derivatives. All studied zinc(II) phthalocyanine complexes generated high singlet oxygen, especially in dimethylsulfoxide, and these properties make them potential photosensitizers for use in the photodynamic therapy of cancer. The effects of the position and quaternization of the substituents on the photophysical and photochemical properties were also ex- amined.

Synthesis and electrochemical properties of copper(II), manganese(III) phthalocyanines bearing chalcone groups at peripheral or nonperipheral positions

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Then, new phthalonitrile derivatives 2 and 3 were prepared with the Abstract: In this study, new chalcone compound 1, new phthalonitrile derivatives 2 and 3, new copper(II), manganese(III) phthalocyanines bearing chalcone groups at peripheral or nonperipheral positions were synthesized.

Microwave-assisted synthesis and characterization of Co(II) phthalocyanine and investigation of its catalytic activity on 4-nitrophenol oxidation

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In this study, all spectroscopic data of Co(II) phthalocyanine showed successful synthesis. Catalytic activities of Co(II) phthalocyanine were then investigated by examining the effects of certain parameters

The interaction between a zinc(II) phthalocyanine compound bearing octakis phenoxyacetamide substituents and calf thymus DNA

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Electronic absorption spectra for the binding activities of CT-DNA with the zinc(II) phthalocyanine com- plex (PcZn) were performed using Agilent Technologies Cary 60 UV/Vis spectroscopy. Absorption titration spectra for the Zn(II) phthalocyanine complex at a fixed concentration of PcZn in a Tris-HCl buffer at a pH of 7.2 were obtained by increasing the concentration of CT-DNA from 0.5 to 5 µM.

Investigation of photochemical and photophysical properties of novel silicon(IV) phthalocyanines and their µ-oxo dimers

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The fluorescence quantum yield and lifetime values decreased with the substitution of the tetraalkylthio groups on the phthalocyanine ring. The singlet oxygen generation of the studied silicon(IV) phthalocyanines increased with the formation of the µ -oxo bridge between two phthalocyanine rings..

Evaluation of carbonic anhydrase and paraoxonase inhibition activities and molecular docking studies of highly water-soluble sulfonated phthalocyanines

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The inhibition of these isoenzymes is the main goal Abstract: The investigation of carbonic anhydrase and paraoxonase enzyme inhibition properties of water-soluble zinc and gallium phthalocyanine complexes (1 and 2) are reported for the first time. The binding of p-sulfonylphenoxy moieties to the phthalocyanine structure favors excellent solubilities in water, as well as providing an inhibition effect on carbonic anhydrase (CA) I and II isoenzymes and paraoxonase (PON1) enzyme.