title: The Highly Connected MOFs Constructed from Nonanuclear and Trinuclear Lanthanide-Carboxylate Clusters: Selective Gas Adsorption and Luminescent pH Sensing.
abstract: The highly odd-numbered 15-connected nonanuclear [Ln9(μ3-O)2(μ3-OH)12(O2C-)12(HCO2)3] and 9-connected trinuclear [Ln3(μ3-O)(O2C-)6(HCO2)3] lanthanide-carboxylate clusters with triangular and linear carboxylate bridging ligands were synergistically combined into Ln-MOFs, [(CH3)2NH2]3{[Ln9(μ3-O)2(μ3-OH)12(H2O)6][Ln3(μ3-O)(H2O)3](HCO2)3(BTB)6}·(solvent)x(abbreviated as JXNU-3, Ln = Gd, Tb, Er; BTB3-= benzene-1,3,5-tris(4-benzoate)), displaying a (3,9,15)-connected topological net. The JXNU-3(Tb) exhibits highly selective CO2adsorption capacity over CH4that resulted from the high localized charge density induced by the presence of the nonanuclear and trinuclear cluster units. In addition, JXNU-3(Tb) with high chemical stability and characteristic bright green color exhibits fluorescent pH sensing, which is pertinent to the different protonation levels of the carboxylate groups of the benzene-1,3,5-tris(4-benzoate) ligand with varying pH.
authors.affiliation: College of Chemistry and Chemical Engineering, Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University , Nanchang, Jiangxi 330022, P. R. China.
authors.forename: Yun-Jian
authors.initials: YJ
authors.lastname: Li
authors.affiliation: College of Chemistry and Chemical Engineering, Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University , Nanchang, Jiangxi 330022, P. R. China.
authors.forename: Yu-Ling
authors.initials: YL
authors.lastname: Wang
authors.affiliation: College of Chemistry and Chemical Engineering, Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University , Nanchang, Jiangxi 330022, P. R. China.
authors.forename: Qing-Yan
authors.identifier: http://orcid.org/0000-0003-1991-792X
authors.initials: QY
authors.lastname: Liu