title: Three new solvent-directed 3D lead(II)-MOFs displaying the unique properties of luminescence and selective CO2 sorption.
abstract: Three new solvent-directed three-dimensional (3D) lead(II) coordination polymers, [Pb2(L)2]n (1), [Pb3(L)3]n (2) and [Pb(L)]·H2O (3) [H3L = 2-(pyridine-2-yl)-1H-imidazole-4,5-dicarboxylic acid], have been synthesized solvothermally. As influenced by different solvent systems, compounds 1 and 3 exhibit varying architectures from a multi-nodal 3,3,4,4-connected to a uninodal 3-connected net, while 2 with helices represents a binodal 3,4-connected topological net. Moreover, 3 possesses a micropore which is decorated with pyridyl systems and uncoordinated carboxylate oxygen atoms. In addition, the small-sized and highly polar pores enable 3 to attract CO2 strongly, leading to a high sorption heat for CO2 and significant selectivity for CO2 over H2 and N2 at 293 K. The luminescent behaviors and emissive lifetimes of 1-3 are also discussed.
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069, PR China.
authors.forename: Jiang
authors.initials: J
authors.lastname: Li
authors.forename: Guoping
authors.initials: G
authors.lastname: Yang
authors.forename: Lei
authors.initials: L
authors.lastname: Hou
authors.forename: Lin
authors.initials: L
authors.lastname: Cui
authors.forename: Yuanpu
authors.initials: Y
authors.lastname: Li
authors.forename: Yao-Yu
authors.initials: YY
authors.lastname: Wang
authors.forename: Qi-Zhen
authors.initials: QZ
authors.lastname: Shi
mesh_terms: D000327:Adsorption; D002245:Carbon Dioxide / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D049449:Luminescence; D008163:Luminescent Measurements; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties
chemical_list: D009942:Organometallic Compounds; D011108:Polymers; D012997:Solvents; D002245:Carbon Dioxide; D007854:Lead