A Mixed-Ligand Approach for a Gigantic and Hollow Heterometallic Cage {Ni64RE96} for Gas Separation and Magnetic Cooling Applications

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• 作者：Wei-Peng Chen ; Pei-Qin Liao ; Youzhu Yu ; Prof. Dr. Zhiping Zheng ; Prof. Dr. Xiao-Ming Chen and Prof. Dr. Yan-Zhen Zheng
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：August 1, 2016
• 年：2016
• 卷：55
• 期：32
• 页码：9375-9379
• 全文大小：3943K
• ISSN：1521-3773

文摘

Nanosized aggregations of metal ions shielded by organic ligands possessing both exquisite structural aesthetics and intriguing properties are fundamentally interesting. Three isostructural gigantic transition-metal–rare-earth heterometallic coordination cages are reported, abbreviated as {Ni₆₄RE₉₆} (RE=Gd, Dy, and Y) and obtained by a mixed-ligand approach, each possessing a cuboidal framework made of 160 metal ions and a nanosized spherical cavity in the center. Along with the structural novelty, these hollow cages show highly selective adsorptions for CO₂ over CH₄ or N₂ at ambient temperatures. Moreover, the gadolinium analogue exhibits large magnetocaloric effect at ultralow temperatures.