Abstract: The effect of metal alternation (Pt and M) in linear-chain halogen-bridged mixed-valence complexes, [M(en) 2 ][PtX 2 (en) 2 ](ClO 4 ) 4 , (X=Cl, Br and I; M=Pt, Pd and Ni; en=ethylenediamine), has been investigated using polarized reflection measurements. The electronic absorption spectra of these materials, obtained by applying the Kramers-Kronig relation to the reflectivity data, show two distinctive charge-transfer exciton bands associated with the inter-metal transitions, “M–Pt”, and the transitions from halogen ions to metal ions, ...
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Topics:
Crystallography
Atomic physics
Molecular physics