pH and temperature responsive redox behavior of biologically important aniline derivatives

The electrochemical oxidation of anilines resulted in azodye formation which was evidenced by the appearance of a new peak in the UV-visible spectra (A) and colour change of the solution (B).

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Study on superoxide and hydroxyl radicals generated in indirect electrochemical oxidation by chemiluminescence and UV-Visible spectra

Journal of Environmental Sciences ◽

10.1016/s1001-0742(08)62200-7 ◽

2008 ◽

Vol 20 (8) ◽

pp. 1006-1011 ◽

Cited By ~ 25

Author(s):

Bo-Tao ZHANG ◽

Li-Xia ZHAO ◽

Jin-Ming LIN

Keyword(s):

Electrochemical Oxidation ◽

Hydroxyl Radicals ◽

Visible Spectra ◽

Uv Visible

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β-Pyrrole brominated meso-tetraphenylporphyrins: synthesis, spectral and electrochemical properties

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424604000192 ◽

2004 ◽

Vol 08 (02) ◽

pp. 201-214 ◽

Cited By ~ 20

Author(s):

Zhongping Ou ◽

Jianguo Shao ◽

Francis D'Souza ◽

Pietro Tagliatesta ◽

Karl M. Kadish

Keyword(s):

Electrochemical Properties ◽

Catalytic Properties ◽

Redox Behavior ◽

Porphyrin Ring ◽

Visible Spectra ◽

Uv Visible ◽

Spectral And Electrochemical Properties

The synthesis, catalytic properties, UV-visible spectra and electrochemistry of β-pyrrole brominated porphyrins are summarized in this brief review. The effect of the Br substituents of the porphyrin ring on the redox behavior, and on axial CO or pyridine binding to the porphyrins is also discussed.

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Infrared and UV-visible spectra of layer semiconductors Gas, GaSe and GaTe

Journal de Physique ◽

10.1051/jphys:0197700380100129300 ◽

1977 ◽

Vol 38 (10) ◽

pp. 1293-1299 ◽

Cited By ~ 18

Author(s):

U. Giorgianni ◽

G. Mondio ◽

P. Perillo ◽

G. Saitta ◽

G. Vermiglio

Keyword(s):

Visible Spectra ◽

Uv Visible

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Effect of NO2 substitution and solvent on UV-visible spectra, redox potentials and electron transfer mechanisms of copper β-nitrotriarylcorroles. Proposed electrogeneration of a Cu(I) oxidation state

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424616500899 ◽

2016 ◽

Vol 20 (07) ◽

pp. 753-765 ◽

Cited By ~ 2

Author(s):

Lina Ye ◽

Zhongping Ou ◽

Yuanyuan Fang ◽

Yang Song ◽

Bihong Li ◽

...

Keyword(s):

Absorption Spectra ◽

Soret Band ◽

Redox Potentials ◽

Nonaqueous Media ◽

Initial Assignment ◽

Visible Spectra ◽

Phenyl Rings ◽

Uv Visible ◽

Electron Reduction ◽

Transfer Mechanisms

Three copper triarylcorroles containing a [Formula: see text]-pyrrole nitro substituent were synthesized and characterized as to their spectral and electrochemical properties in nonaqueous media. The examined compounds are represented as [Formula: see text]-NO2(YPh)3CorCu, where Cor is the trianion of a triphenylcorrole and Y is a Cl, H or CH3 substituent at the para-position of the three meso-phenyl rings of the compound. The data from absorption spectra, electrochemistry and thin-layer spectroelectrochemistry are consistent with an initial assignment of Cu[Formula: see text]-Cor[Formula: see text] in CH2Cl2, DMF and pyridine and electrogeneration of a formal Cu(II) corrole with an unreduced macrocycle, represented as Cu[Formula: see text]-Cor[Formula: see text], after the first one-electron reduction in these solvents. The doubly reduced [Formula: see text]-nitrocorrole has a sharp Soret band at 439 nm and a well-defined Q-band at 611 nm in CH2Cl2. Similar absorption spectra are seen for the three examined doubly reduced nitrocorroles in DMF and pyridine, suggesting formation of a Cu(I) species with an unreduced macrocycle which is represented as Cu[Formula: see text]-Cor[Formula: see text]. Changes in redox potentials and absorption spectra of the nitrocorroles are examined as a function of solvent and substituents on the meso-phenyl rings of the compounds and comparisons are made between spectral and electrochemical data of the newly synthesized corroles and that of structurally related tetraarylcorroles lacking a [Formula: see text]-nitro group.

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Synthesis, Characterization, and Biological Studies of a Piperidinyl Appended Dipicolylamine Ligand and Its Rhenium Tricarbonyl Complex as Potential Therapeutic Agents for Human Breast Cancer

Bioinorganic Chemistry and Applications ◽

10.1155/2016/2675937 ◽

2016 ◽

Vol 2016 ◽

pp. 1-10 ◽

Cited By ~ 4

Author(s):

Amali Subasinghe ◽

Inoka C. Perera ◽

Svetlana Pakhomova ◽

Theshini Perera

Keyword(s):

Breast Cancer ◽

Anticancer Agents ◽

Human Breast Cancer ◽

Human Breast ◽

Tricarbonyl Complex ◽

Nmr Spectrum ◽

H Nmr ◽

Biological Studies ◽

Visible Spectra ◽

Uv Visible

A novel ligand bearing a central piperidinyl sulfonamide group, N(SO2pip)dpa, and its corresponding Re tricarbonyl complex, [Re(CO)3(N(SO2pip)dpa)]+, have been synthesized in good yield. The methylene CH2signal seen as a singlet (4.54 ppm) in a1H NMR spectrum of the ligand in DMSO-d6appears as two doublets (5.39, 5.01 ppm) in a spectrum of the [Re(CO)3(N(SO2pip)dpa)]+complex and confirms the presence of magnetically nonequivalent protons upon coordination to Re. Structural results revealed that the Re–N bond lengths fall within the normal range establishing coordination of ligand to metal. The presence of intraligandπ→π⁎andn→π⁎transitions is indicated by the absorption peaks around 200–250 nm in UV-visible spectra. Absorption peaks in UV-visible spectra around 300 nm for metal complexes were identified as MLCT transitions. The S–N stretch observed as a strong peak at 923 cm−1for N(SO2pip)dpa appeared at a shorter frequency, at 830 cm−1in an FTIR spectrum of the [Re(CO)3(N(SO2pip)dpa)]+. The intense fluorescence displayed by the N(SO2pip)dpa ligand has quenched upon coordination to Re. Relatively low IC50values given by human breast cancer cells, MCF-7, (N(SO2pip)dpa = 139 μM, [Re(CO)3(N(SO2pip)dpa)]+= 360 μM) indicate that N(SO2pip)dpa and [Re(CO)3(N(SO2pip)dpa)]+are promising novel compounds that can be further investigated on their usage as potential anticancer agents.

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