| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1309477 | Inorganica Chimica Acta | 2014 | 8 Pages |
•Two Ag(I) coordination polymers with 1,4-dicyanobenzene were prepared.•Coordinated trifluoroacetate and triflate anions play different roles in the construction of final frameworks.•The guest molecules in complex 1 could be completely liberated, reincorporated and replaced.•Complex 1 shows a preferential adsorption of m-xylene over other xylene isomers.
Complexes {[Ag5(CF3COO)5(1,4-dcb)2].2(C6H6)}n (1) and [Ag2(CF3SO3)2(1,4-dcb)2(μ-H2O)]n (2) were synthesized by reaction of 1,4-dicyanobenzene (1,4-dcb) with AgX (X = CF3COO− or CF3SO3−). Both of them have been characterized by FT-IR, elemental analysis and single-crystal X-ray diffraction. Complex 1 forms 2-D sheets which are constructed from cross-linked 1,4-dcb and 1-D silver(I) chains connecting through trifluoroacetate anions. Benzenes are intercalated as guests between the sheets of complex 1. Complex 2 forms double-strand chains which are built on bimetal centers bridged by a μ-H2O and double bridging 1,4-dcb ligands coordinating via terminal N-donors.Interestingly, the framework of 1 reversibly responds to the removal and inclusion of benzenes. In addition, benzene-eliminated 1 could adsorb toluene and shows a preferential adsorption of m-xylene over other xylene isomers.
Graphical abstractBy employing trifluoroacetate and triflate as anions, two architecturally distinct Ag(I) coordination polymers with 1,4-dicyanobenzene were synthesized and crystallographically characterized. Complex 1 forms 2-D sheets with benzenes intercalated between layers. Complex 2, on the other hand, forms double-strand chains. Interestingly, the guest benzenes in 1 could be completely liberated and reincorporated with the framework reversibly responding to the removal and inclusion of benzenes. Furthermore, complex 1 could absorb m-xylene while blocking its ortho and para isomers.Figure optionsDownload full-size imageDownload as PowerPoint slide
