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Ma M, Li C, Shu D, Wang C, Xi P. Synthesis and characterization of bright green terbium coordination complex derived from 1,4-bis(carbonylmethyl)terephthalate: Structure and luminescence properties. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 190:68-75. [PMID: 28915466 DOI: 10.1016/j.saa.2017.09.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 09/04/2017] [Accepted: 09/07/2017] [Indexed: 06/07/2023]
Abstract
A photoluminescent terbium (Tb) complex involving a novel benzoic-acid compound with a unique coordinated structure, namely 1,4-bis(carbonylmethyl)terephthalate (BCMT), has been designed and synthesized. The new coordinate structure and energy-transfer mechanism between the ligand and Tb(III) ions were investigated in detail. The results demonstrated that the BCMT-Tb(III) complex shows strong fluorescence intensity (4×106a.u.) and long fluorescence lifetime (1.302ms), owing to the favorable degree of energy matching between the triplet excited level of the ligand and the resonant level of Tb(III) ions. Based on the analysis of three-dimensional luminescence spectra, the as-prepared Tb(III) complex can be effectively excited in the range of 250-310nm, and it shows high color purity, with a bright green appearance.
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Affiliation(s)
- Mengjiao Ma
- Tianjin Key Laboratory of Advanced Fibers and Energy Storage, Tianjin Polytechnic University, 399 Bin Shui West Road, 300387 Tianjin, PR China
| | - Congcong Li
- Tianjin Key Laboratory of Advanced Fibers and Energy Storage, Tianjin Polytechnic University, 399 Bin Shui West Road, 300387 Tianjin, PR China
| | - Dengkun Shu
- Tianjin Key Laboratory of Advanced Fibers and Energy Storage, Tianjin Polytechnic University, 399 Bin Shui West Road, 300387 Tianjin, PR China
| | - Chaohua Wang
- Tianjin Key Laboratory of Advanced Fibers and Energy Storage, Tianjin Polytechnic University, 399 Bin Shui West Road, 300387 Tianjin, PR China
| | - Peng Xi
- Tianjin Key Laboratory of Advanced Fibers and Energy Storage, Tianjin Polytechnic University, 399 Bin Shui West Road, 300387 Tianjin, PR China; State Key laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, 100080 Beijing, PR China.
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Maji S, Kumar S, Sankaran K. Luminescence of uranyl ion complexed with 2,6-pyridine dicarboxylic acid as ligand in acetonitrile medium: observation of co-luminescence. RADIOCHIM ACTA 2017. [DOI: 10.1515/ract-2016-2718] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Luminescence from UO2
2+ (uranyl ion) complexed with 2,6-pyridine dicarboxylic acid (PDA) has been studied using acetonitrile (MeCN) as solvent between pH 1.0 and 6.0. The enhancement in luminescence intensity because of sensitization by PDA in the non-aqueous environment provided by the MeCN is found to be one order better than in aqueous medium. The luminescence is further enhanced by about four times following the addition of Y3+; a process known as co-luminescence. This is the first study on co-luminescence of uranyl ion in its PDA complex. Lifetime studies indicate the presence of two species having different micro-environments. Formations of both intra and inter molecular complexes are believed to be responsible for enhancement due to co-luminescence.
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Affiliation(s)
- Siuli Maji
- Materials Chemistry Division , Indira Gandhi Centre for Atomic Research , Kalpakkam 603 102 , Tamil Nadu, India
| | - Satendra Kumar
- Materials Chemistry Division , Indira Gandhi Centre for Atomic Research , Kalpakkam 603 102 , Tamil Nadu, India
| | - Kannan Sankaran
- Materials Chemistry Division , Indira Gandhi Centre for Atomic Research , Kalpakkam 603 102 , Tamil Nadu, India
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Kumar S, Maji S, Joseph M, Sankaran K. Ligand sensitized luminescence of uranyl by benzoic acid in acetonitrile medium: a new luminescent uranyl benzoate specie. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 138:509-516. [PMID: 25528510 DOI: 10.1016/j.saa.2014.11.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 11/18/2014] [Accepted: 11/20/2014] [Indexed: 06/04/2023]
Abstract
Benzoic acid (BA) is shown to sensitize and enhance the luminescence of uranyl ion in acetonitrile medium. Luminescence spectra and especially UV-Vis spectroscopy studies reveal the formation of tri benzoate complex of uranyl i.e. [UO2(C6H5COO)3](-) which is highly luminescent. In particular, three sharp bands at 431, 443, 461nm of absorption spectra provides evidence for tri benzoate specie of uranyl in acetonitrile medium. The luminescence lifetime of uranyl in this complex is 68μs which is much more compared to the lifetime of uncomplexed uranyl (20μs) in acetonitrile medium. In contrary to aqueous medium where uranyl benzoate forms 1:1 and 1:2 species, spectroscopic data reveal formation of 1:3 complex in acetonitrile medium. Addition of water to acetonitrile results in decrease of luminescence intensity of this specie and the luminescence features implode at 20% (v/v) of water content. For the first time, to the best of our knowledge, the existence of [UO2(C6H5COO)3](-) specie in acetonitrile is reported. Mechanism of luminescence enhancement is discussed.
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Affiliation(s)
- Satendra Kumar
- Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
| | - S Maji
- Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
| | - M Joseph
- Fuel Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
| | - K Sankaran
- Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India.
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Maji S, Kumar S, Sankaran K. Fluorescence and co-fluorescence of Tb(3+) and Eu(3+) in acetonitrile using 2,6-pyridine dicarboxylic acid as ligand. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 135:405-409. [PMID: 25105262 DOI: 10.1016/j.saa.2014.07.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 07/04/2014] [Accepted: 07/15/2014] [Indexed: 06/03/2023]
Abstract
Fluorescence from Tb(3+) and Eu(3+) complexed with 2,6-pyridine dicarboxylic acid (PDA) has been studied using acetonitrile (MeCN) as solvent. The enhancement in fluorescence intensity because of non-aqueous environment provided by the MeCN is less significant, where as fluorescence enhancement of more than two orders of magnitude has been observed with the addition of La(3+); a process known as co-fluorescence in MeCN. The present study demonstrates for the first time co-fluorescence of Tb(3+) and Eu(3+) with excitation through the absorption of PDA. Intermolecular energy transfer is believed to be responsible for co-fluorescence enhancement and it becomes possible as the quenching due to water at the secondary coordination spheres of Tb(3+) and Eu(3+) is reduced when MeCN is used as solvent.
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Affiliation(s)
- S Maji
- Material Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India.
| | - Satendra Kumar
- Material Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
| | - K Sankaran
- Material Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
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Maji S, Kumar S, Sankaran K. Estimation of Eu(3+) in bulk uranium by ligand sensitized fluorescence in dimethyl sulphoxide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 133:259-264. [PMID: 24950382 DOI: 10.1016/j.saa.2014.05.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 03/05/2014] [Accepted: 05/06/2014] [Indexed: 06/03/2023]
Abstract
Ligand sensitized fluorescence of europium ion using thenoyltrifluoroacetone (TTA) as a sensitizing ligand and dimethyl sulphoxide (DMSO) as a solvent is studied for the first time. TTA ligand enhances the fluorescence of Eu(3+) by a factor of 40000 in DMSO. Linearity is obtained for a concentration range of 0.076-7.6ng/mL of Eu(3+) with a detection limit of 7.6pg/mL. The quenching of Eu(3+)-TTA fluorescence by uranium matrix was studied in different solvents and found to be less in DMSO. Consequently, estimation of Eu(3+) in a large excess of uranium becomes a possibility without the need to separate uranium from the solution, which has been demonstrated in this paper. Satisfactory results are obtained when Eu(3+) is present at a concentration of 0.6μg/g in uranium.
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Affiliation(s)
- S Maji
- Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India.
| | - Satendra Kumar
- Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
| | - K Sankaran
- Materials Chemistry Division, Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India
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A novel europium-sensitive fluorescent nano-chemosensor based on new functionalized magnetic core–shell Fe3O4@SiO2 nanoparticles. Talanta 2013; 115:271-6. [DOI: 10.1016/j.talanta.2013.04.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 04/01/2013] [Accepted: 04/05/2013] [Indexed: 11/21/2022]
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Zhou Y, Ahmad W, An Y, Zhang L, Zheng X. A new quaternary photoluminescence enhancement system of Eu−N-(o-vanillin)-1,8-diaminonaphthalene−1,10-phenanthroline−Zn and its application in determining trace amounts of europium and zinc. LUMINESCENCE 2013; 29:531-9. [DOI: 10.1002/bio.2582] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Revised: 07/05/2013] [Accepted: 08/05/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Yunshan Zhou
- State Key Laboratory of Chemical Resource Engineering, Institute of Science; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
| | - Waqar Ahmad
- State Key Laboratory of Chemical Resource Engineering, Institute of Science; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
| | - Yugang An
- State Key Laboratory of Chemical Resource Engineering, Institute of Science; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
| | - Lijuan Zhang
- State Key Laboratory of Chemical Resource Engineering, Institute of Science; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
| | - Xiaorui Zheng
- State Key Laboratory of Chemical Resource Engineering, Institute of Science; Beijing University of Chemical Technology; Beijing 100029 People's Republic of China
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Sun HY, Liu CB, Cong Y, Yu MH, Bai HY, Che GB. New photocatalyst for the degradation of organic dyes based on [Co2(1,4-BDC)(NCP)2]n·4nH2O. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.06.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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