Monitoring the Growth of Polyoxomolybdate Nanoparticles in Suspension by Flow Field-Flow Fractionation

详细信息    查看全文

• 作者：Bailin Chen ; Huijian Jiang ; Yan Zhu ; Arthur Cammers ; and John P. Selegue
• 刊名：Journal of the American Chemical Society
• 出版年：2005
• 出版时间：March 30, 2005
• 年：2005
• 卷：127
• 期：12
• 页码：4166 - 4167
• 全文大小：164K
• 年卷期：v.127,no.12(March 30, 2005)
• ISSN：1520-5126

文摘

We follow the evolution of polyoxomolybdate nanoparticles in suspensions derived from the keplerate (NH₄)₄₂[Mo^VI₇₂Mo^V₆₀O₃₇₂(CH₃CO₂)₃₀(H₂O)₇₂]·ca.·300H₂O·ca.·10CH₃CO₂NH₄ ({Mo₁₃₂}) by flow field-flow fractionation (FlFFF) to monitor the particle-size distribution in situ, atomic force and high-resolution transmission electron microscopy (AFM, SEM, and HRTEM) to confirm particle sizes, inductively coupled plasma-optical emission spectrometry (ICP-OES) to determine the Mo content of the FlFFF-separated fractions, and UV/visible spectroscopy to confirm the identity of the species in suspension. We observe the formation of 3-75-nm polyoxomolybdate particles in suspension and the dynamic growth of {Mo₁₃₂} crystals.