Journal ArticleDOI
Optical detection of phosphrescent triplet state endor in zero field
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TLDR
In this article, the appearance of hyperfine structure in the zero-field optically detected microwave transitions is explained using a spin-Hamiltonian incorporating the 14N hyperfine and quadrupole interactions.About:
This article is published in Chemical Physics Letters.The article was published on 1969-12-01. It has received 46 citations till now. The article focuses on the topics: Hyperfine structure & Triplet state.read more
Citations
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Journal ArticleDOI
New Techniques in Triplet State Phosphorescence Spectroscopy: Application to the Emission of 2,3‐Dichloroquinoxaline
D. S. Tinti,M. A. El‐Sayed +1 more
TL;DR: In this article, an amplitude modulated phosphorescence-microwave double-resonance (am-PMDR) spectrum was used to obtain a unique assignment of the originating zf level for each vibronic band in the spectrum.
Journal ArticleDOI
Phosphorescence microwave multiple resonance studies in determining the radiative and nonradiative properties of the triplet state
Journal ArticleDOI
Optical detection of electron-electron double resonance (EEDOR) in zero field of the triplet state
TL;DR: In this paper, an optically detected electron-electron double resonance (EEDOR) experiment is demonstrated on the triplet state of pyrimidine by using two concentric microwave helices.
Journal ArticleDOI
Magnetic Resonance Spectroscopy of Triplet‐State Organic Molecules in Zero External Magnetic Field
TL;DR: In this paper, an exact calculation of the exactly zero external field magnetic resonance spectrum of photoexcited naphthalene is given, and the results of the approximate and exact treatments are compared with these results and with other available experimental information.
Journal ArticleDOI
Optical Pumping of the Lowest Triplet State and Multiple Resonance Optical Techniques in Zero Field
TL;DR: The principles involved in the optical detection of zero-field transitions, electron spin-electron spin double resonance (EEDOR) transitions, and electron spin nuclear spin-single resonance (ENDOR) transition in zero field of the lowest triplet state are briefly summarized in this paper.
References
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Journal ArticleDOI
Phosphorescence-microwave double-resonance (PMDR) spectroscopy
TL;DR: In this article, the effect of saturating the zero-field transitions with microwave radiations on the phosphorescence spectrum is demonstrated at low temperature, and the application of this type of double-resonance experiment in determining the most probable inter-system crossing routes, the mechanisms of the PHYR radiation of the different vibronic bands, the determination of zero field splittings and the electronic distributions in the triplet state is indicated.
Journal ArticleDOI
Paramagnetic Resonance Measurements of the Phosphorescent State of Quinoxaline
James S. Vincent,August H. Maki +1 more
TL;DR: In this paper, the spin Hamiltonian of a single-crystal solid solution of quinoxaline in durene when irradiated at 77°K with uv light from an AH•6 mercury-arc source was described.
Journal ArticleDOI
Nuclear Quadrupole Resonance in Solid Diazines
Ellory Schempp,Philip J. Bray +1 more
TL;DR: In this article, the sp2 hybridization of the nitrogen σ bonding and lone-pair orbitals was analyzed for pyridazine, pyrazine, and pyrimidine.
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Optical detection of zero-field transitions in phosphorescent triplet states
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