Mesostructure of Evaporated Porphyrin Thin Films: Porphyrin Wheel Formation

Topologically protected excitons in porphyrin thin films.

The control of exciton transport in organic materials is of fundamental importance for the development of efficient light-harvesting systems. This transport is easily deteriorated by traps in the disordered energy landscape. Here, we propose and analyse a system that supports topological Frenkel exciton edge states. Backscattering of these chiral Frenkel excitons is prohibited by symmetry, ensu...

Permeable nonaggregating porphyrin thin films that display enhanced photophysical properties.

Porphyrins bearing bulky alkoxyphenyl substituents at two of the four meso-positions and phenyl phosphonates at the other two have been prepared and used as building blocks for layer-by-layer assembly of conductive-glass-supported thin films via zirconium phosphonate chemistry. Thin-film characterization shows that the addition of sterically demanding 2,6-di(n-hexoxy)phenyl substituents to the ...

The Mechanism of Porphyrin Formation*

In previous publications the location of the carbon atoms of protoporphyrin derived from acetate was determined (3, 4). It was found that 26 carbon atoms of protoporphyrin biologically synthesized from C14-methyllabeled and C14-carboxyl-labeled acetate contained Cl4 (4). It was concluded from the Cl4 activity pattern in the porphyrin that the acetate was utilized by being converted t,o a 4-carb...

Band-Gap Tuning Of Electron Beam Evaporated Cds Thin Films

The effect of evaporation rate on structural, morphological and optical properties of electron beam evaporated CdS thin films have been investigated. CdS thin film deposited by electron beam evaporation method in 12nm/min and 60nm/min evaporation rates on glass substrates. X-ray diffraction, scanning electron microscopy, UV-Vis-NIR spectroscopy and Atomic Force Microscopy were used to character...

Porphyrin inhibition of glyoxalase 1