Intercalation of Bulk Guest into LDH via Osmotic Swelling/Restoration Reaction: Control of the Arrangements of Thiacalix[4]arene Anion Intercalates

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• 作者：Gailing Huang ; Shulan Ma ; Xinhua Zhao ; Xiaojing Yang ; Kenta Ooi
• 刊名：Chemistry of Materials
• 出版年：2010
• 出版时间：March 9, 2010
• 年：2010
• 卷：22
• 期：5
• 页码：1870-1877
• 全文大小：967K
• 年卷期：v.22,no.5(March 9, 2010)
• ISSN：1520-5002

文摘

Water-soluble tetrasodium p-sulfonatothiacalix[4]arene (TCAS) was intercalated into MgAl-LDH using an osmotic swelling/restoration reaction of the LDH in formamide. The restoration process was investigated in detail. The arrangement of TCAS in the interlayer can be controlled through adjusting the area per unit charge (S_charge) of TCAS. When S_charge (TCAS) < S_charge (LDH), monolayer (basal spacing, d_basal, 1.30 nm) and alternating “up-down” antiparallel (d_basal, 1.54 and 1.45 nm) arrangements were obtained. When S_charge of TCAS was increased by forming an Ag⁺ complex, bilayer arrangement (d_basal, 2.12 nm) of TCAS(Ag) was formed. This swelling/restoration reaction took place, and the composites retained the morphology of the LDH precursor. The thermal stability of TCAS in the composites was remarkably enhanced, and the “up-down” antiparallel arrangement of TCAS had the highest increase of thermal stability.