Zusammenfassung
The complex Fe(II)(binap)Cl-2 with binap = 2,2,-bis(diphenylphosphino)-1,1'-binaphtyl shows an intraligand phosphorescence in the solid state under ambient conditions. Surprisingly, low-energy LF (ligand field) excited states do not quench this emission. Tetrahedral Fe(II) complexes are d(6) high-spin complexes with a quintet ground state and a quintet state as the only LF excited state. However, ...
Zusammenfassung
The complex Fe(II)(binap)Cl-2 with binap = 2,2,-bis(diphenylphosphino)-1,1'-binaphtyl shows an intraligand phosphorescence in the solid state under ambient conditions. Surprisingly, low-energy LF (ligand field) excited states do not quench this emission. Tetrahedral Fe(II) complexes are d(6) high-spin complexes with a quintet ground state and a quintet state as the only LF excited state. However, this excited quintet is so low in energy that it may not be able to interfere with the observed phosphorescence. This apparently applies to Fe(binap)Cl-2 which shows its LF absorption at lambda(max) = 3100 nm and IL phosphorescence at lambda(max) = 505 nm. It is anticipated that the present report will stimulate more studies of this subject. (C) 2016 Elsevier B.V. All rights reserved.
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