Zeeman Effect of Phosphorescence. II. Intensity Considerations on Pyrazine Phosphorescence

Phosphorescence of pyridoxal.

The effect of pH on the relative distribution of pyridoxal structures in aqueous solution was examined by fluorescence spectroscopy. The hemiacetal structure, which is the predominant species at neutral pH, exhibits a symmetrical emission band at 378 rnp and is characterized by a quantum yield of 0.08. Luminescence studies at low temperature (77” K) have permitted the analysis of the phosphores...

Phosphorescence decay time measurements using intensity correlation spectroscopy.

In this paper, we report on phosphorescence measurements for oxygen dynamics in cells by means of a correlation method, which is an expansion of the fluorescence correlation spectroscopy. The intensity correlation function of the emission excited by a pulsed light source was measured. With changing the pulse timing, both the fluorescence correlation function and the decay time of phosphorescenc...

Metal-enhanced phosphorescence (MEP)

We report the first observation of metal-enhanced phosphorescence (MEP) at low temperature. Silver island films (SiFs) in close proximity to Rose Bengal, significantly enhance the phosphorescence emission intensity. The enhanced phosphorescence intensity is 5-fold brighter from SiFs as compared to a glass control sample at 77 K. In addition, enhanced fluorescence emission and spectral narrowing...

Chiral discrimination by phosphorescence

Phosphorescence in Bacillus Spores

The rapid classification and identification of bacteria and bacterial spores by non-invasive means remains largely unsolved. U.V. fluorescence is becoming an accepted method for detecting the presence of biological aerosols. In other studies, auto fluorescence of bacteria has been shown to be useful in identifying bacteria in a medical application. Our present work attempts to build on this app...