Determination of the Valence State of Diruthenium Moiety Using Redox Reactions and Surface-Enhanced Raman Scattering: Application in Heterometal Extended Metal-Atom Chain Diruthenium Nickel Complexes
作者： Bo-Han Wu , Jyun-You Lin , Kuan-Yi Ho , Min-Jie Huang , Shao-An Hua
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摘要: Redox reaction was photoinduced on metal nanoparticle (NP) with diruthenium complexes absorbing the surface. Surface enhanced Raman scattering (SERS) employed to detect vibrational wavenumber of Ru–Ru stretching mode νRu–Ru,str. During reaction, local environment remains roughly unaltered; variation bonding strength related its valence state can be measured. The heterometal extended atom chain (EMAC) nickel dipyridylamide [Ru2Ni(dpa)4Cl2]0,1+ (dpa = dipyridylamide) display νRu–Ru,str at 327 (broad) and 333 cm–1 in solid form for neutral oxidized complexes, respectively, but red-shift 312 gold NP substrate 328 AgNP. According oxidation potentials from voltammogram, shifts obtained model complex Ru2(OAc)4Cl we assign core charge +5/+4 +6, respectively form. On AuNP ...
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