Lanthanide-Potassium Biphenyl-3,3'-disulfonyl-4,4'-dicarboxylate Frameworks: Gas Sorption, Proton Conductivity, and Luminescent Sensing of Metal Ions.
A novel sulfonate-carboxylate ligand of biphenyl-3,3'-disulfonyl-4,4'-dicarboxylic acid (H4-BPDSDC) and its lanthanide-organic frameworks {[LnK(BPDSDC)(DMF)(H2O)]·x(solvent)}n (JXNU-2, where JXNU denotes Jiangxi Normal University, DMF indicates dimethylformamide, and Ln = Sm(3+), Eu(3+), and Pr(3+)) were synthesized and structurally characterized. The three isomorphous lanthanide compounds feature three-dimensional frameworks constructed from one-dimensional (1D) rod-shaped heterometallic Ln-K secondary building units and are an illustration of a Kagome-like lattice with large 1D hexagonal channels and small 1D trigonal channels. The porous material of the representive JXNU-2(Sm) has an affinity to quadrupolar molecules such as CO2 and C2H2. In addition, the JXNU-2(Sm) compound exhibits humidity- and temperature-dependent proton conductivity with a large value of 1.11 × 10(-3) S cm(-1) at 80 °C and 98% relative humidity. The hydrophilic sulfonate group on the surface of channels facilitates enrichment of the solvate water molecules in the channels, which enhances the proton conductivity of this material. Moreover, the JXNU-2(Eu) material with the characteristic bright red color shows the potential for recognition of K(+) and Fe(3+) ions. The enhancing Eu(3+) luminescence with the K(+) ion and quenching Eu(3+) luminescence with the Fe(3+) ion can be associated with the functional groups of the organic ligand.
College of Chemistry and Chemical Engineering, Key Laboratory of Small Functional Organic Molecule of Ministry of Education, Jiangxi Normal University , Nanchang, Jiangxi 330022, P. R. China.
Li-Juan
LJ
Zhou
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, P. R. China.
Wei-Hua
WH
Deng
College of Chemistry and Chemical Engineering, Key Laboratory of Small Functional Organic Molecule of Ministry of Education, Jiangxi Normal University , Nanchang, Jiangxi 330022, P. R. China.
Yu-Ling
YL
Wang
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, P. R. China.
Gang
G
Xu
College of Chemistry and Chemical Engineering, Key Laboratory of Small Functional Organic Molecule of Ministry of Education, Jiangxi Normal University , Nanchang, Jiangxi 330022, P. R. China.
Shun-Gao
SG
Yin
College of Chemistry and Chemical Engineering, Key Laboratory of Small Functional Organic Molecule of Ministry of Education, Jiangxi Normal University , Nanchang, Jiangxi 330022, P. R. China.
Qing-Yan
QY
Liu