采用一阶导数光谱研究[PtCl_6]^(2-)的可控水解  

Controlled-hydrolysis of [PtCl_6] ^(2-) Studied with 1st Derivative Spectra

作　　者：于迎涛[1] 王晶[1] 杨海军[2] 徐柏庆[2] 

机构地区：[1]大连海事大学环境科学与工程学院,大连116026 [2]清华大学化学系,北京100084

出　　处：《高等学校化学学报》2006年第12期2405-2407,共3页Chemical Journal of Chinese Universities

基　　金：国家重点基础研究发展规划项目(批准号:G2000026408);国家实验室BSRF项目(批准号:SR-06001);大连海事大学引进人才基金资助.

摘　　要：The aquochloro ligand exchange between [PtCl6] 2- and H2O is an important factor to regulate the facet growth in shape-controlled synthesis of Pt nanocrystals because the electric charge and coordination structure of Pt precursor strongly influences its adsorption and reduction on Pt nanocrystal surface. In this contribution, the exposure to violet light（415 nm） is found to efficiently weaken the characteristic LMCT absorption and increase the conductance of 1.5×10 -4 mol/L K2PtCl6 aqueous solution that is fairly stable in dark aging. And, the variations of both the LMCT adsorption and the conductance are closely related with the exposure time. The 1st derivative spectra of ultraviolet absorption shows that the characteristic LMCT absorption shifts toward shorter wavelength along with the exposure which is mainly attributed to the aquochloro ligand exchange of [PtCl6] 2-.The aquochloro ligand exchange between [ PtCl6 ]^2- and H2O is an important factor to regulate the facet growth in shape-controlled synthesis of Pt nanocrystals because the electric charge and coordination structure of Pt precursor strongly influences its adsorption and reduction on Pt nanocrystal surface. In this contribution, the exposure to violet light（415 nm） is found to efficiently weaken the characteristic LMCT absorption and increase the conductance of 1.5×10^-4mol/L K2PtCl6 aqueous solution that is fairly stable in dark aging. And, the variations of both the LMCT adsorption and the conductance are closely related with the exposure time. The 1st derivative spectra of ultraviolet absorption shows that the characteristic LMCT absorption shifts toward shorter wavelength along with the exposure which is mainly attributed to the aquochloro ligand exchange of [PtCl6]^2- .

关 键 词：水解 紫外光潜 导数光谱 电导 纳米粒子形状 

分 类 号：O643[理学—物理化学] O781[理学—化学]