| Resonance Rayleigh scattering(RRS) spectrum is a new , sensitive and simple spectral technique. It can be obtained by the synchronous scanning technique on a fluorescence spectrophotometer. At present, RRS has been applied to study of some biomacromolecules and determination of trace inorganic and organic substances, with satisfactory results. However, it is rarely applied to the study of nanoparticles in liquid phase for a hot-spot of science and technology at present. The synthesis and spectral properties of metal and oxide nanoparticles have been reported. However, there is no report about synthesis and RRS behaviour of ion association nanoparticles that form by attraction force, hydrophobic interaction and intermolecular force. And, the study of this type nanoparticle is helpful to understand the biochemical function of DNA and HSA in life process. Moreover, there is no report about RRS technology utilized to study catalytic reaction, nanophotochemical reaction, nanoparticle color, and the catalytic method for the determination of trace Se, and photochemical determination of trace chloride ion. So that, supported by the National Natural Science Foundation of China, Natural Science Foundation of Guangxi and Chongqing, the three sections including RRS of inorganic nanoparticle, ion association nanoparticle and their new application of RRS have been investigated as follows:1. Synthesis of inorganic nanoparticles and Thier RRS spectraTo further understand the properties of resonance Rayleigh scattering(RRS), some nanoparticles in liquid phase such as Au and Ag, Se, carbon and sulfur, Fe2O3 have been prepared by citrate method, microwave high pressure liquid method etc. Their spectra of RRS, absorption and fluorescence have been studied. There is RRS peak at 580 nm, 460 nm and 570 nm respectively, for red color Au nanoparticle, yellow Ag nanoparticle and orange-red Fe2O3 nanoparticle. The carbon and sulfur nanoparticles all exhibit a Rayleigh scattering(RS) peak at 470 nm when the measured by a RF-540 fluorospectrophotometer. The RRS effect and RRS peak of some metal, nonmetal and oxide nanoparticles have been discovered, through thestudy of Au, Ag, Fe2O3, Se, DNA, carbon and sulfur nanoparticle systems. The important influence factors for RS or RRS peak are RRS effect, the emission spectrum of light resource and the spectral response curve of the detector, and molecular absorption. The formation of interface and nanoparticle in big size, and the light absorption are essential cause that is results to enhancement RS. It is necessary for RRS that the scattering locates the absorption band or nearby.2. RRS spectra of ion-associated nanoparticle and analytical applicationsWe have found out that interaction of one large anion with a large cation to form an ion association complex. If each ion association complexes have strong hydrophobic interaction and intermolecular forces, it may self-aggregate to a nanoparticle. This type nanoparticle is as ion association type nanoparticle. It has common properties of metal nanoparticles, and its special properties.In dilute HC1 solution, resonance Rayleigh scattering (RRS) of AuCl4- or crystal violet (CV) is very weak, which exist as small molecules. However, when they react with each other to form an ion-association complex, the complexes will further self-aggregate to form nanoparticles of which the mean diameter is about 46 nm. The formation of nanoparticles can results in the great enhancement of RRS. The maximum RRS wavelength is located at 535 nm and a smaller RRS peak is at 322 run. These two peaks are just located at the absorption band of the ion-association complex and correspond with the absorption peaks at 538 and 335 nm, respectively. The Au(III) concentration hi the range of 20-2000 ng/ml is directly proportional to the intensity of RRS . The method has high sensitivity and the detection limit ( =3) is 6.8 ng/ml. The effect of coexisting substances was investigated, which showed that the method had good selectivity. The method was...
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