title: A 1D anionic lanthanide coordination polymer as an adsorbent material for the selective uptake of cationic dyes from aqueous solutions.
abstract: A 1D anionic lanthanide coordination polymer {[(CH(3))(2)NH(2)] [(H(2)abtc)(2)Ho(H(2)O)]}n () (H(4)abtc = 3,3',5,5'-azobenzene-tetracarboxylic acid) has been synthesized under hydrothermal reaction conditions. The protonated [(CH(3))(2)NH(2)](+) is generated from decomposed DMA during the reaction, and balances the negative charge of the framework. The as-obtained samples were characterized using single-crystal and powder X-ray diffraction and TGA. Interestingly, 1 can selectively capture cationic dye molecules from mixtures of dye molecules containing different charges in aqueous solutions. Furthermore, 1 exhibits a different adsorption efficiency toward different cationic dyes (crystal violet, rhodamine B, safranine T and methylene blue). Among the studied dyes, methylene blue has a higher adsorption efficiency in comparison to the others. Thus, complex 1 could serve as a good candidate material for the selective removal of cationic dyes during the treatment of wastewater.
authors.affiliation: Department of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, and Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin 300071, P. R. China. guwen68@nankai.edu.cn liuxin64@nankai.edu.cn.
authors.forename: Pei-Yao
authors.initials: PY
authors.lastname: Du
authors.forename: Hui
authors.initials: H
authors.lastname: Li
authors.forename: Xin
authors.initials: X
authors.lastname: Fu
authors.forename: Wen
authors.initials: W
authors.lastname: Gu
authors.forename: Xin
authors.initials: X
authors.lastname: Liu