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ODMR studies

Optically detected magnetic resonance (ODMR) studies of -iT-conjugated polymer-based hght emitting diodes (LEDs) J. Shinar Organic Electroluminescent Materials and Devices, S. Miyata and H.S. Nalwa, Eds., Gordon and Breach, Amsterdam, pp.177-202... [Pg.48]

The most direct demonstration of triplet-triplet energy transfer between the aromatic amino acids is the ODMR study by Rousslang and Kwiram on the tryptophanyl-tyrosinate dipeptide.(57) Since the first excited singlet state of tyrosinate is at lower energy than that of tryptophan, it is possible to excite tyrosinate preferentially. The phosphorescence of this dipeptide, however, is characteristic of tryptophan, which is consistent with the observation that the triplet state of tyrosinate is at higher energy than that of tryptophan, making tryptophan the expected triplet acceptor. [Pg.16]

Magnetic field effects on the luminescence of a liquid polyphenoxy polymer excited in the VUV region show that highly excited singlet states of aromatic chromophores can relax to form two triplets. A spectroscopic and ODMR study has been reported on the triplet state of N-methyl-p-nitroaniline ° . [Pg.28]

Optically Detected Magnetic Resonance (ODMR) Studies of Ti-conjugated Polymer Films, Solutions, Blends, and Devices... [Pg.319]

Figure 7.7 shows an example of the energy of the spin sublevels of the triplet state as a function of H for // [a-, H y, and // z [61]. The behaviour of the spin energy levels is orientation-dependent [61], and the fields-for-resonance for the allowed Am = 1 transitions vaiY with the orientation of H relative to the triplet axes. Most ESR and ODMR studies of triplets states in biological molecules [58] and triplet excitons in crystalline semiconductors [55] have consequently been performed on single crystals. All of the samples described in this chapter, however, were polycrystalline or amorphous, and the triplet resonance lineshape is therefore the powder pattern obtained by averaging the spectra over all orientations [62]. Simulated powder pattern spectra for different values of E/D are shown in Figure 7.8 ... [Pg.327]

Optically detected magnetic resonance (ODMR) studies of 7i-conjugated polymer films, solutions, blends and devices... [Pg.874]

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ODMR

Optically detected magnetic resonance ODMR) studies

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