Synthesis, structure and luminescence properties of samarium (III) and dysprosium (III) complexes with a new tridentate organic ligand

An, Bao-Li; Gong, Ming; Li, Mingxing; Zhang, Jiming

doi:10.1016/s0022-2860(03)00410-1

Cited by 112 publications

(27 citation statements)

References 19 publications

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“…The UV spectra shows that the maximum absorption peaks of the complexes are around 283-284 nm, while the peak at 256 nm is ascribed to the characteristic absorption for 2,3-dichlorobenzoic acid. The facts can be explained by the expansion p-conjugated system that is caused by the metal coordination [23]. Moreover, the maximum absorption band of bipy at 280 nm is similar to that of in the complexes.…”

Section: Ultraviolet Spectramentioning

confidence: 75%

Crystal structures, luminescent properties and thermal decomposition kinetics of some binuclear lanthanide complexes with 2,3-dichlorobenzoic acid anion and 2,2′-bipyridine

et al. 2011

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Some binuclear lanthanide complexes with the general formula [Ln(2,3-DClBA) 3 bipy] 2 (Ln = Sm(1), Eu(2), Tb(3), Dy(4), and Ho(5); 2,3-DClBA = 2,3-dichlorobenzoate; bipy = 2,2 0 -bipyridine) were synthesized and characterized by elemental analysis, molar conductance, infrared, ultraviolet, luminescent spectroscopy, thermogravimetry, and different thermogravimetry (TG-DTG) techniques. The single crystals of the complexes have been obtained except the complex 2 and their structures have been determined by single-crystal X-ray diffraction. The four complexes are isostructural and the rare earth ions are all nine coordinated. The two rare earth ions in each complex are linked by two bridging bidentate and two chelating-bridging tridentate carboxylate groups. Under ultraviolet light excitation, the europium and terbium complexes exhibited characteristic red fluorescence of Eu 3? ion and green fluorescence of Tb 3? ion at room temperature. The non-isothermal kinetics was investigated by using the integral isoconversional non-linear (NL-INT) and the Popescu methods. The mechanism functions of the first decomposition step of the complexes 3-5 were determined. Meanwhile, the thermodynamic parameters (DG = , DH = , and DS = ) at DTG peak temperatures were also calculated.

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Section: Ultraviolet Spectramentioning

confidence: 75%

Crystal structures, luminescent properties and thermal decomposition kinetics of some binuclear lanthanide complexes with 2,3-dichlorobenzoic acid anion and 2,2′-bipyridine

et al. 2011

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“…As shown in the table, maximum absorption wavelength (k max ) of 3-Br-4-MHBA was 253 nm, which shifted to 262 nm in complexes. The shift probably assigned to expansion of the p-conjugated system which is caused by the metal coordination [29], while there was no obvious shift in complexes compared with 1,10-phenanthroline, indicating that Ln-N had no significant effect on ultraviolet absorption of (14) Symmetry transformations used to generate equivalent atoms #1 -x?1,-y?1,-z?1…”

Section: Ultraviolet Spectramentioning

confidence: 99%

Lanthanide complexes with 3-bromine-4-methyl benzoic acid and 1,10-phenanthroline

Zong

Ren

Zhang

et al. 2015

J Therm Anal Calorim

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The crystal structures of complexes [Tb (3-Br-4-MBA) 3 phen] 2 (1), [Ho(3-Br-4-MBA) 3 (phen)H 2 O] 2 (2) and [Er(3-Br-4-MBA) 3 (phen)H 2 O] 2 (3) (3-Br-4-MBA=3-bromine-4-methylbenzoate, phen=1,10-phenanthroline) have been solved by single-crystal X-ray diffraction methods. All obtained products were examined and characterized by elemental analysis, molar conductivity, IR, UV and XRD techniques. The thermogravimetric analysis of 1 to 3 was studied, indicating that the decomposition processes of 2 and 3 are different from 1. The mass loss of the first step for 2 and 3 is attributed to the H 2 O molecules. The three-dimensional IR accumulation spectra of gaseous of 1 to 3 were also recorded. Complex 1 emits strong and bright green fluorescence under UV light at the room temperature. The bacteriostatic activities of the three complexes against bacteria, such as Escherichia coli and Staphylococcus aureus, and fungus (Candida albicans) were tested.

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“…The excitation of the Sm(III) complex at 386 nm leads to emission of Sm 3+ with four typical emission bands [ Fig. 3 (a)] at 468, 560, 598 and 644 nm due to π -π* transitions of the ligand and 4 G 5/2 → 6 H J (J = 5/2, 7/2, 9/2) transitions (An et al 2004, Yan et al 2007. The ligand retains its emission at a shorter wavelength.…”

Section: Synthesis Of Ln(iii) Complexesmentioning

confidence: 99%

Investigations into Luminescent Properties of Sm(III), Eu(III), Tb(III) and Dy(III) Complexes of Some Schiff-base Ligands

Shakya

Tamrakar

2015

J. Inst. Sci. Tech.

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Luminescent properties of Sm(III), Eu(III), Tb(III) and Dy(III) complexes of three Schiff-base ligands viz., H2L1, H2L1 and H2L3 [where H2L1 = N,N’-di-(4-decyloxysalicylidene)-1’,4’-diaminobutane; H2L2 = N,N’-di-(4-decyloxysalicylidene)- 2’,6’-diaminopyridine; and H2L3 = N,N’-di-(4-decyloxysalicylidene)-1’,3’-diaminobenzene] synthesized in our earlier work were investigated. The homo dinuclear lanthanide complexes were of the type, [Ln2(LH2)3(NO3)4](NO3)2. Luminescence analysis revealed that among the lanthanide complexes, only Sm(III) complex of H2L1 was found to have displayed characteristic metal-centered emission (solution state) whereas Sm(III), Eu(III) and Tb(III) complexes of H2L1 and Eu(III) and Tb(III) complexes of H2L3 exhibited ligand-centered emissions.Journal of Institute of Science and Technology, 2014, 19(1): 19-24

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Synthesis, structure and luminescence properties of samarium (III) and dysprosium (III) complexes with a new tridentate organic ligand

Cited by 112 publications

References 19 publications

Crystal structures, luminescent properties and thermal decomposition kinetics of some binuclear lanthanide complexes with 2,3-dichlorobenzoic acid anion and 2,2′-bipyridine

Crystal structures, luminescent properties and thermal decomposition kinetics of some binuclear lanthanide complexes with 2,3-dichlorobenzoic acid anion and 2,2′-bipyridine

Lanthanide complexes with 3-bromine-4-methyl benzoic acid and 1,10-phenanthroline

Investigations into Luminescent Properties of Sm(III), Eu(III), Tb(III) and Dy(III) Complexes of Some Schiff-base Ligands

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