[Ultraviolet absorption spectra of iodine, iodide ion and triiodide ion].
Guang Pu Xue Yu Guang Pu Fen Xi
; 25(1): 86-8, 2005 Jan.
Article
en Zh
| MEDLINE
| ID: mdl-15852827
ABSTRACT
Ultraviolet absorption spectra of iodine I2, iodide ion I(-) and triiodide ion I3(-) were studied, and molar absorptivities of these species were determined. Absorption spectrum of I2 aqueous solution appears as an absorption peak at 203 nm with a molar absorptivity of 1.96 x 10(4) L x mol(-1) x cm(-1). Absorption spectrum of I(-) appears as two absorption peaks at 193 and 226 nm with molar absorptivities of 1.42 x 10(4) and 1.34 x 10(4) L x mol(-1) x cm(-1), respectively. When I2 aqueous solution is mixed with KI solution, two absorption peaks appear at 288 and 350 nm, respectively, indicating the formation of I3(-). Using saturation method, molar absorptivities of I3(-) at 288 and 350 nm were determined to be 3.52 x 10(4) and 2.32 x 10(4) L x mol(-1) x cm(-1), respectively.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Espectrofotometría Ultravioleta
/
Yoduros
/
Yodo
Idioma:
Zh
Revista:
Guang Pu Xue Yu Guang Pu Fen Xi
Año:
2005
Tipo del documento:
Article
País de afiliación:
China