Triplet-Triplet Absorption Spectrum ofN,N-Dimethylaniline (DMA) measured by the Flash Photolysis Technique

Determination of the pK values of the lumiflavin triplet state by flash photolysis.

Dependence of the lumiflavin triplet-triplet absorption spectrum on pH. Figure I shows the transient change in absorption when lumiflavin soJutions of pH = 2, pH = 7, and pH = 13 are flashed. From this the triplet-triplet absorption spectra of the acid (pH = 2), neutral (pH = 7), 1964; Kramer and Maute, 1972). The flash energy could be varied between 300 J and 900 J. The half duration of the fl...

The speed limit for protein folding measured by triplet-triplet energy transfer.

A direct measure of intramolecular chain diffusion is obtained by the determination of triplet-triplet energy-transfer rates between a donor and an acceptor chromophore attached at defined points on a polypeptide chain. Single exponential kinetics of contact formation are observed on the nanosecond time scale for polypeptides in which donor and acceptor are linked by repeating units of glycine ...

Detecting triplet locking by triplet synchronization indices.

We discuss the effect of triplet synchrony in oscillatory networks. In this state the phases and the frequencies of three coupled oscillators fulfill the conditions of a triplet locking, whereas every pair of systems remains asynchronous. We suggest an easy to compute measure, a triplet synchronization index, which can be used to detect such states from experimental data.

Polymerization Inhibition by Triplet State Absorption for Nanoscale Lithography

Photochemical C2-C6 cyclization of enyne-allenes: detection of a fulvene triplet diradical in the laser flash photolysis.

A series of enyne-allenes, with and without benzannulation at the ene moiety and equipped with aromatic and carbonyl groups as internal triplet sensitizer units at the allene terminus, was synthesized. Both sets, the cyclohexenyne-allenes and benzenyne-allenes, underwent thermal C(2)-C(6) cyclization exclusively to formal ene products. In contrast, the photochemical C(2)-C(6) cyclization of eny...