Protecting the triplet excited state in sterically congested platinum porphyrin.

Investigation of Oxygen-Induced Quenching of Phosphorescence in Photoexcited Aromatic Molecules by Positron Annihilation Spectroscopy

iii Symbols A constant I i intensity of ith component Mg.OEP magnesium octaethyl porphyrin Pt.OEP platinum octaethyl porphyrin P(S i), P(T i) singlet and triplet states of metalloporphyrin molecules R = S Doppler parameter, T i ith triplet state X(O 2) mole fraction of oxygen in surrounding medium τ i lifetime of ith component Superscript: * excited state of complex S with light

Interplay between singlet and triplet excited states in a conformationally locked donor-acceptor dyad.

The synthesis and photophysical characterization of a palladium(II) porphyrin - anthracene dyad bridged via short and conformationally rigid bicyclo[2.2.2]octadiene spacer were achieved. A spectroscopic investigation of the prepared molecule in solution has been undertaken to study electronic energy transfer in excited singlet and triplet states between the anthracene and porphyrin units. By us...

Red Phosphorescent Organic Light-emitting Diodes

Phosphorescent organic light-emitting diodes (OLEDs) have the great advantage of highlyefficient emission compared with conventional fluorescent OLEDs. Pt(II) porphyrins are among the most promising saturated red phosphorescent dyes, yet tuning of their properties by making structural modifications has only been attempted on a modest scale, despite the large structuraldiversity of synthetic por...

Photoinduced triplet-state electron transfer of platinum porphyrin: a one-step direct method for sensing iodide with an unprecedented detection limit

Excited-state Equilibration Over 30 Angstrom In A Platinum(ii) Quinolinolate-bridge-platinum(ii) Porphyrin Complex