TY - JOUR
T1 - Optical properties of halogen-bridged mixed-valence complexes, [m(En)2][ptx2(en)2](cio4)4, (m=pt, pd and ni; x = c1, br and i)
T2 - Effects of metal-alternation
AU - Wada, Yoshiki
AU - Mitani, Tadaoki
AU - Toriumi, Koshiro
AU - Yamashita, Masahiro
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1989
Y1 - 1989
N2 - The effect of metal alternation (Pt and M) in linear-chain halogen-bridged mixed-valence complexes, [M(en)2][PtX2(en)2](CIO4)4, (X=C1, 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, “X-Pt”. On substitution of M=Pt by Pd or Ni, the absorption intensity of the “X-Pt” exciton was enhanced in contrast to the reduction of the “M-Pt” exciton intensity. The intensity borrowing between these two excitons is consistent with a numerical calculation based on a trimer model of the CT exciton transitions.
AB - The effect of metal alternation (Pt and M) in linear-chain halogen-bridged mixed-valence complexes, [M(en)2][PtX2(en)2](CIO4)4, (X=C1, 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, “X-Pt”. On substitution of M=Pt by Pd or Ni, the absorption intensity of the “X-Pt” exciton was enhanced in contrast to the reduction of the “M-Pt” exciton intensity. The intensity borrowing between these two excitons is consistent with a numerical calculation based on a trimer model of the CT exciton transitions.
KW - Charge transfer
KW - Exciton
KW - Halogen-bridged mixed-valence complexes
KW - Kramers-Kronig transformation
KW - Metal substitution
KW - Optical properties
KW - Reflectivity
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U2 - 10.1143/JPSJ.58.3013
DO - 10.1143/JPSJ.58.3013
M3 - Article
AN - SCOPUS:0001628811
VL - 58
SP - 3013
EP - 3021
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 8
ER -