ICCAS OpenIR
Study on Synthesis, Structure Characterization and Fluorescence of Europium Complexes of 2-(4-Fluorobenzoyl) Benzoic Acid
Wang Juan1; Geng Xiao-tian1; Li Zhao-ye1; Zhao Ying2; Wu Hong3; Yan Jian-bo3; Wang Yun-you3; Sun Bo1
2009
Source PublicationSPECTROSCOPY AND SPECTRAL ANALYSIS
ISSN1000-0593
Volume29Issue:1Pages:156-160
AbstractThe present paper reports three new europium complexes, EuL(3) ( H(2)O)(6), Eul(3)Phen (H(2)O)(4) and EuL(3) (TPPO) (H(2)O)(5), synthesized with Eu(NO(3))(3)center dot 6H(2)O, 2-(4-fluorobenzoyl) benzoic acid, Phen and TPPO (L=2-(4-fluorobenzoyl) benzoic acid, Phen= 1, 10-phenanthroline, TPPO=triphenyl phosphine oxide). Their composition and chemical structures were characterized by elemental analysis IR and (1)H NNIR spectroscopy. The IR spectra indicated that all complexes exhibited the characteristic peaks of carboxylate, asymmetric stretching vibration (nu(as)(CO(2)(-))) and symmetric stretching vibration (nu(s)(CO(2)(-))) peaks; the C=O stretching band at 1 692 cm(-1) of COOH and the O-H stretching band around 2 500-3 200 cm(-1) disappeared. All these complexes had a smaller Delta nu(nu(as)(CO(2)(-))-nu(s) (CO(2)(-))) value than that of NaL, so the carboxylate groups coordinated with the europium ion in the form of bridging bidentate. In 1HNMR, the signals of hydrogen in 2-(4-fluorobenzoyl) benzoic acid became wide and shifted upfield? and those in Phen, TPPO shifted downfield. The excitation and emission spectra were recorded at room temperature. The excitation spectra showed that the optimum excitation peaks of these three complexes, EuL(3) (H(2)O)(6), EuL(3) Phen(H(2)O)(5) and EuL(3) (TPPO) (H(2)O)(5), were at 353.0, 355.0 and 357.0 nm, respectively. All these three complexes showed Eu(3+) ion characteristic emission bands, the electron-dipole transition (5)D(0) -> (7)F(2) and magnetism dipole transition (5)D(0)-(7)F(1); their emission peaks were at 596.0, 617.0; 596.0, 619.0; 595.0, 620.0 nm, and the relative intensities were 1.1, 8.6; 15.2, 100.0; 3.6, 23.2, respectively. The intensity of (5)D(0) -> (7)F(2) was stronger than that of (5)D(0) - (7)F(1), which indicated that europium ions were at asymmetric center. The emission intensities of europium ions were greatly sensitized by Phen.
KeywordEuropium 2-(4-fluorobenzoyl) Benzoic Acid Complexes Fluorescence Spectra
DOI10.3964/j.issn.1000-0593(2009)01-0156-05
Indexed BySCI
Language英语
WOS IDWOS:000262521200036
PublisherOFFICE SPECTROSCOPY & SPECTRAL ANALYSIS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/66124
Collection中国科学院化学研究所
Corresponding AuthorSun Bo
Affiliation1.Nankai Univ, Coll Chem, Dept Chem Mat, Tianjin 300071, Peoples R China
2.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China
3.China Dankong Ind & Trade Grp Co, Taizhou 318000, Peoples R China
Recommended Citation
GB/T 7714
Wang Juan,Geng Xiao-tian,Li Zhao-ye,et al. Study on Synthesis, Structure Characterization and Fluorescence of Europium Complexes of 2-(4-Fluorobenzoyl) Benzoic Acid[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2009,29(1):156-160.
APA Wang Juan.,Geng Xiao-tian.,Li Zhao-ye.,Zhao Ying.,Wu Hong.,...&Sun Bo.(2009).Study on Synthesis, Structure Characterization and Fluorescence of Europium Complexes of 2-(4-Fluorobenzoyl) Benzoic Acid.SPECTROSCOPY AND SPECTRAL ANALYSIS,29(1),156-160.
MLA Wang Juan,et al."Study on Synthesis, Structure Characterization and Fluorescence of Europium Complexes of 2-(4-Fluorobenzoyl) Benzoic Acid".SPECTROSCOPY AND SPECTRAL ANALYSIS 29.1(2009):156-160.
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