Synthesis, Characterization and Fluorescent Properties of Two 3D Open-framework Rare-earth Sulfates [Ln4(H2O)4(SO4)10](C4N2H12)4(H2O)4(Ln=Gd, Eu)

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (3): 644.

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Synthesis, Characterization and Fluorescent Properties of Two 3D Open-framework Rare-earth Sulfates [Ln4(H2O)4(SO4)10](C4N2H12)4(H2O)4(Ln=Gd, Eu)

GE Gen-Wu,LIU Mei-Pin,NI Zhi-Gang,DU Hong-Bin

School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China

Received:2010-11-05 Revised:2010-12-08 Online:2011-03-10 Published:2011-02-23
Contact: Hong-Bin DU E-mail:hbdu@nju.edu.cn
Supported by:
国家自然科学基金(批准号: 21071075)资助.

Abstract

Abstract: Two novel 3-D open framework rare-earth sulfates, [Ln4(H2O)4(SO4)10](C4N2H12)4(H2O)4 (Ln = Gd, 1; Eu, 2) were solvothermally synthesized in a water-ethanol mixed solvent system by using piperazine as a template and characterized by single-crystal X-ray diffraction. The two compounds are isostructural and crystallize in the monoclinic system, space group P21/c with unit cell parameters of a = 19.691(3) ?，b = 19.249(3) ?，c = 13.186(2) ?， β = 92.33(0)o，V = 4993.5(1) ?3, Z =4 for 1, and a = 19.7233(8) ?，b = 19.2791(8) ?，c = 13.2095(5) ?，β = 92.329(1)o，V = 5018.7(3) ?3, Z = 4 for 2, Both compounds consist of 2D sheets of 8-membered rings and 16-membered rings constructed from edge- or corner-sharing SO4, GdO8 and GdO9 polyhedra. The 2D sheets stack parallel with each other and are pillared by SO4 tetrahedra to form a 3-D open framework, in which the protonated piperazine molecules are located to balance the negative charges of the framework. The solid-state fluorescence spectra of compound 2 show the characteristic luminescent behavior of Eu3+ ions.

Key words: Solvothermal synthesis, 3-D open-framework, rare-earth sulfates, piperazine, template

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GE Gen-Wu LIU Mei-Pin NI Zhi-Gang Hong-Bin DU. Synthesis, Characterization and Fluorescent Properties of Two 3D Open-framework Rare-earth Sulfates [Ln4(H2O)4(SO4)10](C4N2H12)4(H2O)4(Ln=Gd, Eu)[J]. Chem. J. Chinese Universities, 2011, 32(3): 644.

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Synthesis, Characterization and Fluorescent Properties of Two 3D Open-framework Rare-earth Sulfates [Ln4(H2O)4(SO4)10](C4N2H12)4(H2O)4(Ln=Gd, Eu)

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