title: [Spectral properties of the association particle system of quinine-[PtI6]2- and its analytical application].
abstract: In 0.01 mol x L(-1) HCl medium, red color [PtI6]2- and quinine combine to form association molecule. The molecules aggregate automatically owing to strong hydrophobic and molecular forces. And PtI6-quinine association particles with violet-red color formed. It exhibits three resonance scattering peaks at 310 nm, 400 nm and 610 nm, and a Rayleigh scattering peak at 470 nm. The absorption values all increase in the wavelength range of 350-740 nm, and the fluorescence peak at 450 nm was quenched. Under the conditions chosen, the quinine concentration in the range of 0-40 x 10(-6) mol x L(-1) is linear to the A(620 nm) value. The mole absorption coefficient epsilon(620 nm) is 1.31 x 10(4) L x mol(-1) x cm(-1). The results show that the association particles produce the resonance scattering effect, fluorescence quenching and the violet-red color.
authors.affiliation: Department of Resource and Environmental Science, Guangxi Normal University, Guilin 541004, China.
authors.forename: Zhi-liang
authors.initials: ZL
authors.lastname: Jiang
authors.forename: Jie-ming
authors.initials: JM
authors.lastname: Zou
authors.forename: Cai-yan
authors.initials: CY
authors.lastname: Kang
authors.forename: Li-sheng
authors.initials: LS
authors.lastname: Wang