title: (C4N2H12)3[Ln3(OH)(SO4)7] (Ln = Sm, Eu, and Tb): a series of honeycomb-like open-framework lanthanide sulfates with extra-large channels containing 24-membered rings.
abstract: Three novel organic amine templated honeycomb-like lanthanide sulfates, (C4N2H12)3[Ln3(OH)(SO4)7] (Ln = Sm (1), Eu (2), and Tb (3)), with extra-large channels containing 24-membered rings (24MR) have been synthesized by using chair form piperazine as the structure-directing agent under one-pot solvothermal reactions. The three compounds are isostructural, and the open framework of the title compounds is the first lanthanide sulfate example with extra-large channels containing 24MR. It has an acs framework topology. The three compounds are strong luminescent materials that display characteristic Sm(3+), Eu(3+), and Tb(3+) emission bands in the visible region. The observed second-harmonic generation efficiencies of the three compounds are all 0.4 times that of urea. TGA profiles and XRD measurements demonstrate their high thermal stability.
authors: State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, People's Republic of China.
authors: Deng
authors: D
authors: Zhang
authors: Yun
authors: Y
authors: Lu
authors: Dunru
authors: D
authors: Zhu
authors: Yan
authors: Y
authors: Xu