[Absorption spectra study of the association nanoparticle system of berberine-[AuI4]- and its analytical application].
Guang Pu Xue Yu Guang Pu Fen Xi
; 24(12): 1640-2, 2004 Dec.
Article
en Zh
| MEDLINE
| ID: mdl-15828348
ABSTRACT
In 0.008 mol x L(-1) HCl medium, [AuCl4]- and I- combine to form [AuI4]-. [AuI4]- reacts with berberine (BB) to form (AuI4-BB) association molecule. The molecules aggregate automatically owing to strong hydrophobic and molecular forces. And (AuI4-BB)n association nanoparticles with orange-yellow color were observed. It exhibits a resonance scattering peak at 520 nm. The absorption peak for the nanoparticle system and the [AuI4]- is at 350 nm. However, the absorbance values for the nanoparticle system increased in the visible light region. Under the conditions chosen, the BB concentration in the range of 0.8 x 10(-6) mol x L(-1)-20 x 10(-6) mol x L(-1) is linear to the A(450 nm) value. The results show that the formation of (AuI4-BB)n nanoparticles produces the resonance scattering effect and the orange-yellow color.
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Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Risk_factors_studies
Idioma:
Zh
Revista:
Guang Pu Xue Yu Guang Pu Fen Xi
Año:
2004
Tipo del documento:
Article
País de afiliación:
China