Multiconformational surfaces in porphyrins: previews into excited-state landscapes
Article Abstract:
Radiographic imaging of crystal structures of the porphyrin compounds ZnDPP, H2DPP and NiDPP were performed. In addition, the multiconformational surfaces of the porphyrin samples were described. Electron paramagnetic resonance studies determined the excitation spectra of the porphyrin molecules. The molecules of ZnDPP and H2DPP exhibited plasticity and varied landscapes within a family of compounds. A correlation between skeletal distortions of excited state lifetimes and the photophysics and chemistry of nonplanar chromophores was observed.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
Visible light sensitization of titanium dioxide with self-organized porphyrins: organic P-I-N solar cells
Article Abstract:
The development of organic photovoltaic solar cells is discussed. A self-organized free base 5,10,15,20-tetrakis(4-n-octylphenyl) porphyrin (H2TOPP) is prepared to act as an intrinsic film. It is sandwiched between a titanium dioxide thin film and a zinc 5,10,15,20-tetra (4-carboxyphenyl) porphyrin (ZnTCPP) (p-type) thin film which is also an excellent sensitizer for titanium dioxide. It is shown that the H2TOPP acts as an intrinsic semiconductor and than ZnTCPP acts as a p-type semiconductor.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Photochemistry of nitrosyl metalloporphyrins: mechanisms of the photoinduced release and recombination of NO
Article Abstract:
Laser flash photolysis was used to prepare and investigate a series of substituted nitrosylmetalloporphyrins of the type M(NO)(meso-tetra(p-X)phenylporphyrin). An examination of the kinetics of the recombination reactions between the metalloporhyrins and NO in THF showed that the recombination mechanism appears more complicated than the simple second-order process earlier reported. One possible explanation is out-of-plane puckering of the porphyrin ring immediately after denitrosylation.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Nucleation of self-associating fluids: Free versus activated association. Physical stability and relaxation of amorphous indomethacin
- Abstracts: Spacer-controlled aggregation and surface morphology of a selenacarbocyanine dye on gemini monolayers. Enhanced lubricity in mixed alkanethiol monolayers
- Abstracts: Hydrolysis/condensation reactions at the sol-gel/air interface: pure titania alkoxide expose to air-water molecules
- Abstracts: Tilt: Major factor in sterols' ordering capability in membranes. Replacing the cholesterol hydroxyl group with the ketone group facilitates sterol flip-flop and promotes membrane fluidity
- Abstracts: Cluster models for calcite surfaces: ab initio quantum chemical studies. The distribution and conformation of very long-chain plant wax components in a lipid bilayer