In:
Zeitschrift für Naturforschung A, Walter de Gruyter GmbH, Vol. 42, No. 6 ( 1987-6-1), p. 622-629
Abstract:
The 1:1 phenanthrene-tetrachlorophthalic anhydride (P/TCPA) charge-transfer complex crystalizes with monoclinic symmetry, space group P2 1 , with two magnetically inequivalent stacks in the unit cell. The noncentrosymmetric space group is very unusual for CT-complexes. The optical emission spectra at low temperature are characterized by a strong CT phosphorescence and a weak CT fluorescence and delayed fluorescence. The S 1 band lies at 22 800 ± 100 cm -1 , the T 1 band at 21 200 ± 100 cm -1 . Above 15 K triplet excitons, moving along the stacks are revealed by ESR. They have a CT character of about 30%, coinciding with that of the shallow X-traps found by ODMR at low temperatures. A further trap, with zero-field-splitting (zfs) parameters of D = ± 0.0617, E = + 0.0116 cm -1 has a much larger CT character of 50% as found in the isolated complex in low-temperature glass [1]. A structural model is proposed.
Type of Medium:
Online Resource
ISSN:
1865-7109
,
0932-0784
DOI:
10.1515/zna-1987-0618
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
1987
detail.hit.zdb_id:
2079610-9
detail.hit.zdb_id:
124634-3
detail.hit.zdb_id:
124633-1
detail.hit.zdb_id:
2767412-5
