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Citation: WANG Chun-Yan, WU Xiao-Shuo, LI Xia. Synthesis,Crystal Structure and Property of Ten-coordinated Mononuclear Terbium Complex with Acetic Acid and 1,10-Phenanthroline[J]. Chinese Journal of Applied Chemistry, ;2008, 25(4): 455-458. shu

Synthesis,Crystal Structure and Property of Ten-coordinated Mononuclear Terbium Complex with Acetic Acid and 1,10-Phenanthroline

1.
Department of Chemistry, Capital Normal University, Beijing 100037

Corresponding author: LI Xia,
Received Date: 13 April 2007
Available Online: 4 June 2007
Fund Project: 北京市自然科学基金项目资助(2073022) (2073022)

A new complex Tb(Ac)₃(phen)₂(HAc=acetic acid) was prepared from 2-carboxycinnamic acid,Tb(NO₃)₃·6H₂O,and 1,10-phenanthroline (phen).The pH of the solution was adjusted to 5 with 2 mol/L NaAc solution.The title complex was characterized by IR,fluorescence spectrum,DTA-TG and X-ray single-crystal diffraction.The complex belongs to the monoclinic system with space group Cc,a=1.164 5(2) nm,b=1.792 56(3) nm,c=1.303 63(3) nm,α=90.00°,β=100.516 0(10)°,γ=90.00°,M=696.47,V=2.565 14(7) nm³,Z=4,F(000)=2 436,the final R=0.038 2 and wR=0.083 1 for 4 897[R(int)=0.029 7]independent reflections and 4 487 observed reflections (I>2σ(I)).The center Tb³⁺ ion is coordinated by four nitrogen atoms from the two 1,10-phenanthroline molecules and six oxygen atoms from three Ac^- groups to form a mononuclear structure complex with a coordination number of 10.The carboxylic groups are bonded to the Tb³⁺ ion in the chelating bidentate.The coordination environment of Tb³⁺ ion is bicapped square-antiprism.The title complex emits intense green fluorescence under ultraviolet light excitation,its luminescence spectrum was measured at room temperature,and the emissions caused by ⁵D₄→⁷F_j (j=3~6) transitions of Tb³⁺ ion were observed.
- terbium complex,
- crystal structure,
- fluorescence spectrum
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