Spectroscopic Study of Porphyrin-Caffeine Interactions
نویسندگان
چکیده
منابع مشابه
A spectroscopic study on the interactions of porphyrin with G-quadruplex DNAs.
Free-base porphyrin (5,10,15,20-tetrakis(1-methyl-4-pyridyl)-21H,23H-porphine) (H(2)TMPyP4) has been shown to be an effective telomerase inhibitor by an in vitro assay. Here, we examined the interactions of the H(2)TMPyP4 with three distinct G-quadruplex DNAs, the parallel-stranded (TG(4)T)4, dimer-hairpin-folded (G(4)T(4)G(4))2, and monomer-folded AG(3)(T(2)AG(3))(3), by ultraviolet resonance ...
متن کاملA spectroscopic and thermodynamic study of porphyrin/DNA supramolecular assemblies.
Assemblies of trans-bis(N-methylpyridinium-4-yl)diphenylporphine ions on the surface of calf thymus DNA have been studied using several spectroscopic techniques: absorbance, circular dichroism, and resonance light scattering. The aggregation equilibrium can be treated as a two-state system-monomer and assembly-each bound to the nucleic acid template. The aggregate absorption spectrum in the Sor...
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Porphyrins molecules are gaining importance in the present era. Porphyrins are important part of biological molecules like hemoglobin and chlorophyll .Photo system 1 and photo system 2 is important sunlight trap in chloroplast. Electron transport chain is a series of chemical reaction in which energy is formed in the form of ATP (Adenosine triphosphate).The members of electron transport chains ...
متن کاملSynthesis and spectroscopic characterization of two tetrasubstituted cationic porphyrin derivatives.
An imidazolium tetrasubstituted cationic porphyrin derivative (the free base and its Zn(II) complex) with five-membered heterocyclic groups in the meso-positions were synthesized using microwave irradiation, and the compounds obtained characterized by (1)H-NMR and mass spectrometry. We observed that under microwave irradiation the yield is similar to when the synthesis is performed under conven...
متن کاملSynthesis and Spectroscopic Characterization of Meso-tetra (3-hydroxyphenyl)Porphyrin
The preparation of compounds where functionality in the meso-position of the tetrapyrrolic ring is introduced during the formation of the porphyrin represents the main purpose of this work. The synthesis of 5,10,15,20tetrakis(3-hydroxyphenyl)porphyrin (3-OHPP), by Adler method, implying reaction between mhydroxybenzaldehyde/ pyrrole/ propionic anhydride at a molar ratio of 1/ 1/ 1, in large exc...
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ژورنال
عنوان ژورنال: Journal of Fluorescence
سال: 2012
ISSN: 1053-0509,1573-4994
DOI: 10.1007/s10895-012-1090-9