Well-resolved fluorescence spectra are reported for single crystals of C6o at 1.2 K. The fluorescence is found to be composed of two contributions. Fluorescence-microwave double-resonance experiments indicate that the dominant component originates from deep X-traps that consist of pairs of C60 molec
Triplet excitation of C60 and the structure of the crystal at 1.2 K
β Scribed by E.J.J. Groenen; O.G. Poluektov; M. Matsushita; J. Schmidt; J.H. van der Waals; G. Meijer
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 499 KB
- Volume
- 197
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Electron-spin-echo experiments at 95 GHz and 1.2 K reveal that the triplet excitation of a single crystal of CeO is delocalized over either a pair or a chain oft& molecules along ( 110) directions. Two distinct triplet species have been observed in a one-toone ratio which verifies the proposed 2 a0 face-centred cubic superstructure of the crystal at low temperature. The C6,, molecules on the two sublattices differ by a rotation over 60" about ( 111) directions.
π SIMILAR VOLUMES
The structures were determined by Patterson syntheses and rigid-body refinements. The c 6 0 molecules show two orientations with one molecular centre in common. The solvent molecules are disordered too. Static disorder could not be overcome or influenced by cooling down. A coordination number of 10
The molecular structure of [ l.l.l]propellane has been determined from single-crystal X-ray diffraction measurements at 138 K. The crystals of this reactive compound were grown from the melt at ca. 263 K. The space group is C2, and the asymmetric unit contains four molecules. All have large thermal
At 123 K, the crystal structure of 1,2-dipalmitoyl-sn-glycerol (C35H6sOs, M r = 568.9) is monoclinic with space group P2 l, a = 5.480(1), b = 7.301(1), c = 43.145(7)/k, fl = 92.91(1) Β°, V= 1724 ,~ 3 Dc = 1.0960 g cm -3 and Z = 2. Integrated X-ray intensities for 3574 independent reflections were mea
The optical emission of the CT complex anthracenels-tetracyanoben,ene (A/TCNB) was investkated between 1.2 K and 300 K. Delayed fluorescence was observed in the whole temperature range. provin, 0 the existence of mobile triplet e\crtons even at 1.2 K. Prompt and delayed fluorescence show a remarkabl