Interactions of electronically excited copper(II)-porphyrin with DNA: resonance Raman evidence for the exciplex formation with adenine and cytosine residues
Article Abstract:
Molecular complexes between the water-soluble cationic metalloporphyrin copper (II)-tetrakis porphyrin (CuP) and a series of DNA-model single-stranded homopolynucleotides is studied by resonance Raman spectroscopy as concerns their ability to form exciplexes under high-power nanosecond laser irradiation. The results suggest that besides thymine and uracil, adenine and cystosine can serve as axial ligands for photoexcited CuP, in complexes with some single-stranded deoxyribopolynucleotides.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2003
User Contributions:
Comment about this article or add new information about this topic:
SERS and tunneling spectroscopy investigation of iron-protoporphyrin IX adsorbed on a silver tip
Article Abstract:
Iron-protoporphyrin IX adsorbed on a scanning tunneling microscopy silver tip is investigated by combining surface enhancement Raman (SERS) and tunneling spectroscopies down to single molecule regime. The results reveal the occurrence of a strong electronic coupling between the molecule and the metal, which may help in explaining the dynamical phenomena at the molecule-metal interface.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
User Contributions:
Comment about this article or add new information about this topic:
Geometry and solvent-polarity dependences of the relaxation dynamics of the singlet excited state of center-to-edge phosphorus(V) porphyrin heterodimers
Article Abstract:
The contribution of the charge-transfer (CT) state to the decay process of the singlet excited state of center-to-edge phosphorous (V) porphyrin heterodimers (p- and m-Pm-PCl2) is investigated. The results have shown that m-Pm-PCl2 is an effective component in the supramolecular system for fast and sequential electron transfer via the CT state.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Positive activation volume for a cytochrome C electrode process: evidence for a "protein friction" mechanism from high-pressure studies
- Abstracts: Distinct difference in ionic transport behavior in polymer electrolytes depending on the matrix polymers and incorporated salts
- Abstracts: Temperature dependence of the excited-state intramolecular proton transfer reaction in hypericin and hypocrellin A
- Abstracts: CO adsorption on gold clusters stabilized on ceria-titania mixed oxides: Comparison with reference catalyst. Surface and subsurface hydrogen: Adsorption properties on transition metals and near-surface alloys
- Abstracts: Carbon nanotubes functionalized by N[O.sub.2]: Coexistence of charge transfer and radical transfer. Chemisorption of NO2 on carbon nanotubes