Luminescence magnetic field dependence

The temperature and magnetic field dependence of photoconductivity and quantum yield of luminescence compete with one another between 130 and 4.2 K (i.e., the photoconductivity increases when the quantum yield decreases and vice versa, see figure in paper), Streit, Wachter [10], Streit [11]. 

Numerous articles have appeared on poly(arylene vinylene) systems, acetylenes and related polymers. The temperature dependence of the photoluminescence from poly(p-phenylene vinylene) (PPPV) has been examined in terms of its influence on diffusion rates while a magnetic field has been found to enhance luminescence intensity. A series of poly(alkoxyphenylenes) have been synthesised with high luminescence quantum yields whereas vapour deposited poly(p-phenylene vinylene) has been found to have an unidentifiable defect structure when annealed at high temperatures. ... 

The interaction of aspartic acid and other ligands with complexes of Tb " with edta and related ligands has also been studied and association constants determined. The complex formation between Tb " or Eu " and (r)-( — )-l,2-propanediaminetetraacetic add or (r,r)-trons-1,2-cyclohexanediaminetetraacetic acid has been similarly investigated. The pH dependence of the circularly polarized and total luminescence shows a drastic configurational change of the chelate system at pH 10.5-11, corresponding, it is believed, to formation of hydroxide complexes. Tlie technique of magnetic-field-induced circularly polarized emission has been introduced for lanthanide ions the mechanisms of lanthanide transition intensities are also discussed in the paper. 

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