Journal ArticleDOI
Investigation of the lowest triplet state of free base porphin by microwave induced changes in its fluorescence
TLDR
The zero-field splitting of the non-phosphorescent lowest triplet state of free base porphin is measured by observing microwave induced changes in the fluorescence of this molecule as a guest in a Shpolskii-matrix of n -octane at 4.2°K.About:
This article is published in Chemical Physics Letters.The article was published on 1973-08-15. It has received 88 citations till now. The article focuses on the topics: Porphin & Triplet state.read more
Citations
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High resolution spectra of palladium, platinum and copper porphins in n-octane crystals
TL;DR: In this paper, high-resolution Q-band absorption and emission spectra of palladium porphin (PdP), PtP and CuP in slowly grown single crystals of n -octane at 4.2 K are reported.
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ESR in zero field of the photoinduced triplet state in isolated reaction centers of rhodopseudomonas sphaeroides R-26 detected by the singlet ground-state absorbance
TL;DR: In this article, zero-field resonance transitions of the triplet state of the primary donor monitoring the transmittance at 890 nm at 1.2 K in isolated reaction centers of Rhodopseudomonas sphaeroides R-26 were measured.
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Theoretical study of triplet state properties of free-base porphin
TL;DR: In this article, the authors presented results and analysis of various properties of the triplet state of free-base porphin (FBP) as calculated by density-functional theory and obtained the radiative lifetime of phosphorescence lines and microwave signals in optical detection of magnetic resonance (ODMR) spectra.
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Electron spin resonance in zero magnetic field of the reaction center triplet of photosynthetic bacteria
Arnold J. Hoff,H.Gorter De Vries +1 more
TL;DR: The present results explain the decrease in fluorescence intensity observed on microwave saturation in zero-field optical detection magnetic resonance experiments, and they also show that the simple exciton model is inadequate to derive the geometry of the reaction center dimer from the observed zerofield and decay rates.
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Spin polarization in the lowest triplet state of chlorophyll
TL;DR: The spin-lattice relaxation time is found to be anisotropic and shorter than the decay rates of individual spin levels for chlorophyll-b in glassy solution.
References
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Journal ArticleDOI
The lowest triplet state of Zn porphin
TL;DR: In this article, three pairs of microwave transitions with widths of a few MHz are found, all of them corresponding to a decrease in phosphorescence intensity, corresponding to the Shpolskii effect, and it was further established that by pumping either of these transitions a third one can be detected at the difference frequency, so that the order of the levels must be X>Y>Z (or reverse)
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Optical and Zeeman studies of the first excited singlet state of zinc porphin in a single crystal of n-octane: Evidence for Jahn-Teller instability
TL;DR: In this paper, the absorption and fluorescence spectra of Zn porphin in an n-octane single crystal at 4·2 K are reported in the region between 17 400 and 18 500 cm-1.
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The lowest triplet state of Zn porphin. II. Investigation of its dynamics by microwave induced delayed phosphorescence
Journal Article
[Study of porphin metal complexes by the method of quasi-linear spectra].
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Optically Detected Adiabatic Inversion in Phosphorescent Triplet States and the Measurement of Intramolecular Energy Transfer Processes
TL;DR: The theory and observation of microwave induced population inversion within triplet magnetic sublevels in zero field is presented in this paper, where inversion via adiabatic fast passage can be measured quantitatively by changes in triplet phosphorescence and can be accomplished easily and with microwave field strengths even lower than are required for cw saturation.