title: Size-selective crystallization of homochiral camphorate metal-organic frameworks for lanthanide separation.
abstract: Lanthanides (Ln) are a group of important elements usually found in nature as mixtures. Their separation is essential for technological applications but is made challenging by their subtly different properties. Here we report that crystallization of homochiral camphorate metal-organic frameworks (MOFs) is highly sensitive to ionic radii of lanthanides and can be used to selectively crystallize a lanthanide element into predesigned MOFs. Two series of camphorate MOFs were synthesized with acetate (Type 1 with early lanthanides La-Dy) or formate (Type 2 with late lanthanides Tb-Lu and Y) as the auxiliary ligand, respectively. The Ln coordination environment in each type exhibits selectivity for Ln(3+) of different sizes, which could form the basis for a new cost-effective method for Ln separation.
authors.affiliation: Department of Chemistry and Biochemistry, California State University , Long Beach, California 90840, United States.
authors.forename: Xiang
authors.initials: X
authors.lastname: Zhao
authors.forename: Matthew
authors.initials: M
authors.lastname: Wong
authors.forename: Chengyu
authors.initials: C
authors.lastname: Mao
authors.forename: Thuong Xinh
authors.initials: TX
authors.lastname: Trieu
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.forename: Pingyun
authors.initials: P
authors.lastname: Feng
authors.forename: Xianhui
authors.initials: X
authors.lastname: Bu