Effect of two sonochemical procedures on achieving to different morphologies of lead(II) coordination polymer nano-structures

详细信息    查看全文

• 作者：Kamran Akhbari^a ; Ali Morsali^a ; ^{Morsali_a@modares.ac.ir} ; Pascal Retailleau^b
• 关键词：Nano-structure ; Coordination polymer ; Lead(II) ; Sonochemical ; Solid-state ; Structural transformation
• 刊名：Ultrasonics Sonochemistry
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：20
• 期：6
• 页码：1428-1435
• 全文大小：3180 K

文摘

Micro and nano-structures of a lead(II) coordination polymer, [Pb₂(2-Me-8-Hq)₂(MeOH)₂]_n (1), [2-Me-8-HqH = 2-methyl-8-hydroxyquinoline]_, were synthesized by two sonochemical methods. These new micro and nano-structures were characterized by scanning electron microscopy, X-ray powder diffraction, IR spectroscopy and elemental analyses. Compound 1 was structurally characterized by single-crystal X-ray diffraction and consists of primary dimeric unit of [Pb₂(2-Me-8-Hq)₂(MeOH)₂]. Self assembly between the dimmeric units of [Pb₂(2-Me-8-Hq)₂(MeOH)₂] from Pb-O bonds results in formation of a one-dimensional lead(II) coordination polymer. The Pb^II-ion in compound 1 has PbO₆N₁ coordination sphere with a stereo-chemically ¡®active¡¯ electron lone pair on the metals. By a reversible solid-state structural transformation, we successfully prepared [Pb₂(2-Me-8-Hq)₂]_n (2) by thermal desolvation of 1. Thermal stability of compound 1 was studied by thermo gravimetric and differential thermal analyses. In addition nano-structure of PbO was prepared from calcination process of compound 1 at 873 K.