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Volumn 131, Issue 15, 2009, Pages

Photoinduced charge-transfer process in rubidium manganese hexacyanoferrate probed by Raman spectroscopy

Author keywords

[No Author keywords available]

Indexed keywords

CHARGE-TRANSFER BANDS; ELECTRONIC EXCITED STATE; HIGH TEMPERATURE; HIGH TEMPERATURE PHASE; KINETIC MODELS; LATTICE MISMATCHING; LOW TEMPERATURES; PHASE DOMAIN; PHOTO-INDUCED; PHOTO-INDUCED CHARGE; PHOTO-INDUCED PHASIS; PHOTOPRODUCTIONS; RAMAN PEAK; RUBIDIUM MANGANESE HEXACYANOFERRATE; STRETCHING MODES; VALENCE STATE;

EID: 70449380682     PISSN: 00219606     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.3245863     Document Type: Article
Times cited : (18)

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    • Our observed Raman spectra in HT and LT phases under 632.8 nm excitation are in good agreement with those reported by Cobo (Ref.). They assigned the peak at 2096 cm-1 to Fe(II)-CN-Mn(III). However, we assigned the 2095 cm-1 peak observed in the LT phase to Fe(II)-CN-Mn(II) for the following reasons. (1) This frequency is lower than the typical CN stretching frequency for Fe (II) -CN-M (III) (Refs.). (2) Comparing Raman and IR absorption spectra, we see that the CN stretching frequencies in the former tend to appear at higher frequencies at about 10-20 cm-1, as shown in Table. Considering this tendency, the peak at 2095 cm-1 is further outside the typical frequency range of Fe (II) -CN-M (III) (Refs.). (3) Following this tendency, the Raman peak at 2095 cm-1 is expected to be observed at about 2075-2085 cm-1 in the IR absorption spectra. In the previous report of IR measurements, the Fe(II)-CN-Mn(II) peak was observed at 2073 cm-1, which is close to the above value (Ref.).
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