Zn-MOFs Containing Flexible 伪,蠅-Alkane (or Alkene)-Dicarboxylates and 1,2-Bis(4-pyridyl)ethane Ligands: CO2 Sorption and Photoluminescence

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• 作者：In Hong Hwang ; Ha-Yeong Kim ; Myoung Mi Lee ; Yu Jeong Na ; Jin Hoon Kim ; Hyun-Chul Kim ; Cheal Kim ; Seong Huh ; Youngmee Kim ; Sung-Jin Kim
• 刊名：Crystal Growth & Design
• 出版年：2013
• 出版时间：November 6, 2013
• 年：2013
• 卷：13
• 期：11
• 页码：4815-4823
• 全文大小：704K
• 年卷期：v.13,no.11(November 6, 2013)
• ISSN：1528-7505

文摘

The use of five flexible 伪,蠅-alkane (or alkene)-dicarboxylates (succinate (2), fumarate (3), adipate (5), and muconate (6)) produced three-dimensional (3-D) Zn^II frameworks with 1,2-bis(4-pyridyl)ethane pillars, whereas glutarate gave a two-dimensional (2-D) Zn^II compound (4). Structures 2 and 5 are 4-fold interpenetrated networks, and 3 and 6 are 5-fold interpenetrated networks. Both 5 and 6 displayed good CO₂ sorption capabilities at 196 K, as evidenced by S-shape adsorption isotherms. Both compounds also exhibited selective CO₂ sorption over N₂ at low temperature, while 5 containing an adipate ligand showed higher CO₂ uptake at 273 and 298 K than 6 with a more rigid muconate ligand. The isosteric heats of CO₂ adsorption for 5 and 6 were 23.1 kJ mol^鈥? and 30.7 kJ mol^鈥?, respectively. A photoluminescence study showed the emissions of 2, 4, and 5 to be blue-shifted relative to both the free acids and ligand, while 3 had ligand-based luminescence properties. The thermal stabilities of these complexes were also examined.