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Ahlawat P, Kumari P, Lather V, Kumar M, Kumar R. Warm red light emitting Eu(III) complexes synthesis and analysis including computational methods for photonic applications. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2025; 324:124976. [PMID: 39208545 DOI: 10.1016/j.saa.2024.124976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2024] [Revised: 08/07/2024] [Accepted: 08/12/2024] [Indexed: 09/04/2024]
Abstract
Six luminescent europium organic complexes have been synthesized and studied for their luminescent properties. The synthesized complexes were analyzed through elemental analysis, XRD, SEM, EDAX, FT-IR, NMR and thermogravimetry. The complexes exhibit crystalline behavior and possess decent thermal stability. Photoluminescence study on complexes were conducted in both solid and solution states, the results indicate the characteristic red emission. With the addition of ancillary ligands, water molecules are replaced from inner coordination sphere, leading to enhanced luminescence properties. The colorimetric parameters (CIE, CP%, CCT, u', v') suggest aptness of these complexes in red light illuminating OLEDs. The J-O parameters were calculated experimentally and theoretically with the help of LUMPAC software. Theoretical and experimental results agree well reflecting the efficacy of the outcomes. As a result of red emission, these complexes could have interesting photonics applications. The biological studies indicate the probable use of these complexes in the medical industry.
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Affiliation(s)
- Pratibha Ahlawat
- University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak 124001, India
| | - Poonam Kumari
- University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak 124001, India
| | - Vaishnavi Lather
- Shri Guru Ram Rai Institute of Medical and Health Sciences, Dehradun, Uttarakhand 248001, India
| | - Manoj Kumar
- University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak 124001, India
| | - Rajesh Kumar
- University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak 124001, India.
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Ahlawat P, Kumari P, Lather V, Rathee B, Kumar R. Europium-based β-hydroxyketone complexes: synthesis, optoelectronic, thermal and computational analyses. Photochem Photobiol Sci 2024; 23:881-899. [PMID: 38581535 DOI: 10.1007/s43630-024-00561-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 03/08/2024] [Indexed: 04/08/2024]
Abstract
Six red-light-emitting Eu(III) complexes having a β-hydroxyketone as ligand and heterocyclic ring containing compounds as ancillary ligands were synthesized to explore their use in displays and optoelectronics. The coordinating behavior of complexes was determined by various techniques such as FTIR (Fourier transform infrared), 1H-NMR (Nuclear magnetic resonance), and 13C-NMR that establishes a bonding of ligand and ancillary ligand with the Eu(III) ion. Morphology and purity were investigated through XRD (X-ray diffraction), SEM (scanning electron microscopy) and EDS (energy-dispersive X-ray spectroscopy) analyses that suggest semicrystalline and pure complex formation. Thermal analysis of complexes by TGA/DTG (thermogravimetric/derivative thermogravimetric) indicates that complexes are stable upto 200 ºC temperature making them suitable for use in display devices. Analysis of the photophysical properties was carried out in both solid and solution states using PL (photoluminescence) studies, color parameters, J-O (Judd-Ofelt) analysis and bandgap. Most emissive transition (5D0 → 7F2) is responsible for the red emission in the complexes. The CIE (Commission International de I'Eclairage) coordinates of complexes also indicate the red emission on UV excitation. The bandgap which was obtained in the range of 2.54-3.02 eV reveals the semiconducting behavior of complexes. Values of J-O parameters and Ω2 in the complexes reflect asymmetric chemical environment around Eu (III) and less covalence and the Ω4 indicates that complexes are less rigid. Bandgap calculated through DFT (density function theory) for complexes is in range of 2.37-2.77 eV, and intensity parameters (J-O), energy transfer rates, and spherical coordinates were determined by LUMPAC software. The computational data are in good harmony with the experimental data. Further biological aspects of complexes were studied using antioxidant and antimicrobial studies.
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Affiliation(s)
- Pratibha Ahlawat
- University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, 124001, India
| | - Poonam Kumari
- University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, 124001, India
| | - Vaishnavi Lather
- Shri Guru Ram Rai Institute of Medical and Health Sciences, Dehradun, Uttarakhand, 248001, India
| | - Bhawna Rathee
- University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, 124001, India
| | - Rajesh Kumar
- University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, 124001, India.
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Hasan N, Ilmi R, Iftikhar K. Synthesis, X-ray crystal structure and photophysics of butterfly shape orange and red emanating polynuclear complexes of tris(dibenzoylmethanato)Ln(III) (Ln = Sm/Eu) and exo-bidentate 4,4'-bipyridine. Photochem Photobiol Sci 2024; 23:315-327. [PMID: 38261230 DOI: 10.1007/s43630-023-00519-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 11/30/2023] [Indexed: 01/24/2024]
Abstract
Reaction of two equivalents of [Ln(dbm)3(H2O)] (Ln = Sm/Eu/Gd) with one equivalent of 4,4'-bipyridine (4,4'-bpy) led to the formation of rare polynuclear complexes of the type [Ln(dbm)3(4,4'-bpy)]n (dbm is the anion of 1,3-diphenyl-1,3-propanedione) instead of symmetrically bridged dinuclear complexes. The structure of the complexes has been established by the single crystal X-ray diffraction (SC-XRD) method and shows that the coordination sphere is composed of a LnO6N2 core (octacoordinated). Shape analysis further revealed that the geometry around Ln(III) is distorted square anti-prismatic with SHAPE value 0.738 and 25.719 for [Sm(dbm)3(4,4'-bpy)]n and [Eu(dbm)3(4,4'-bpy)]n, respectively. Photoluminescence (PL) properties of [Sm(dbm)3(4,4'-bpy)]n and [Eu(dbm)3(4,4'-bpy)]n are discussed in the solid-state and PMMA hybrid film (w/w 6%). By employing theoretical modelling in conjunction with the experimental PL data and crystal structure and an energy transfer (ET) mechanism for the sensitized PL of [Eu(dbm)3(4,4'-bpy)]n is proposed and discussed in detail. Finally, the role of each ligand in sensitized PL of [Eu(dbm)3(4,4'-bpy)]n is calculated and discussed by the chemical partitions of the radiative decay.Graphical abstract.
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Affiliation(s)
- Najmul Hasan
- Department of Chemistry, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, Delhi, 110 062, India.
- Lanthanide Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, 110 025, India.
| | - Rashid Ilmi
- Department of Chemistry, Sultan Qaboos University, P.O. Box 36, 123, Al-Khod, Oman.
| | - Khalid Iftikhar
- Lanthanide Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, 110 025, India
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Kumar M, Lather V, Nandal P, Ahlawat P, Kumari P, Khatkar A, Khatkar SP, Taxak VB, Kumar R. New Highly Luminescent Red Emitting Complexes: Synthesis, Characterization, Judd-Ofelt Intensity Parameters and Pharmacological Investigations. J Fluoresc 2023:10.1007/s10895-023-03506-7. [PMID: 38015295 DOI: 10.1007/s10895-023-03506-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 11/06/2023] [Indexed: 11/29/2023]
Abstract
A series of new red luminescent Eu(III) complexes were integrated by β-hydroxyketone ligand 2-(4-chlorophenyl)-1-(2-hydroxy-4,6-dimethoxyphenyl)ethan-1-one (CHDME) as main ligand and 1,10-phenanthroline (phen) or 5,6-dimethyl-1,10-phenanthroline (dmphen) or bathophenanthroline (bathophen) as ancillary ligand. The complexes were synthesised by solution precipitation method. The CHDME is taken as ligand and its analogous Eu(III) complexes were characterized by elemental analysis, FT-IR and 1H-NMR. The photoluminescent properties were also examined in solid state. The Judd-Ofelt intensity parameters (Ω2 and Ω4) and luminescence quantum efficiency (η) of Eu(III) complexes were additionally figured out as per luminescence spectra and decay cure. UV analysis and optical band was also calculated. Computational analysis were carried out and optical band and Judd-Ofelt intensity parameters were determined. Furthermore, the pharmacological activities such as antimicrobial and antioxidant activity of ligand CHDME and its analogous Europium complexes were also examined. The methods used were tube dilution method for calculating antimicrobial activity and DPPH free radical method for antioxidant activity.
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Affiliation(s)
- Manoj Kumar
- University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, , 124001, India
| | - Vaishnavi Lather
- Shri Guru Ram Rai Institute of Medical and Health Sciences, Dehradun, Uttarakhand, 248001, India
| | - Poonam Nandal
- Deenbandhu Chhotu Ram University of Science and Technlogy, Murthal, 131039, India
| | - Pratibha Ahlawat
- University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, , 124001, India
| | - Poonam Kumari
- University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, , 124001, India
| | - Aarti Khatkar
- Deenbandhu Chhotu Ram University of Science and Technlogy, Murthal, 131039, India
| | - S P Khatkar
- Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, India
| | - V B Taxak
- Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, India
| | - Rajesh Kumar
- University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, , 124001, India.
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Hooda A, Singh D, Nehra K, Dalal A, Kumar S, Malik RS, Rathi B, Kumar P. Luminescent Tb(III) complexes with Lewis bases for displays: Synthesis and spectral investigation. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
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Ganaie AB, Iftikhar K. Structure, optical absorption and NIR-Photoluminescence of ternary Neodymium (III) complexes with fluorinated β-diketone and heterocyclic Lewis bases. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Luminous lanthanide diketonates: Review on synthesis and optoelectronic characterizations. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2023.121406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Coban MB. A new 3D HoIII-organic framework constructed from 1,3,5-tris(4-carboxyphenyl)benzene and 1,10-phenanthroline: Crystal structure, morphological and solid state luminescence properties. J SOLID STATE CHEM 2023. [DOI: 10.1016/j.jssc.2022.123651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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Hooda A, Nehra K, Dalal A, Bhagwan S, Gupta I, Singh D, Kumar S. Luminescent Features of Ternary Europium Complexes: Photophysical and Optoelectronic Evaluation. J Fluoresc 2022; 32:1529-1541. [DOI: 10.1007/s10895-022-02956-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 04/20/2022] [Indexed: 01/31/2023]
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Nehra K, Dalal A, Hooda A, Singh D, Kumar S. Exploration of newly synthesized red luminescent material of samarium for display applications. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109361] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Hooda A, Dalal A, Nehra K, Singh D, Kumar S, Singh Malik R, Kumar P. Preparation and optical investigation of green luminescent ternary terbium complexes with aromatic β-diketone. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139495] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Ganaie A, Iftikhar K. Theoretical Modeling (Sparkle RM1 and PM7) and Crystal Structures of the Luminescent Dinuclear Sm(III) and Eu(III) Complexes of 6,6,7,7,8,8,8- Heptafluoro-2,2-dimethyl-3,5-octanedione and 2,3-Bis(2-pyridyl)pyrazine: Determination of Individual Spectroscopic Parameters for Two Unique Eu 3+ Sites. ACS OMEGA 2021; 6:21207-21226. [PMID: 34471726 PMCID: PMC8387994 DOI: 10.1021/acsomega.0c05976] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 06/14/2021] [Indexed: 06/13/2023]
Abstract
Heteroleptic homo dinuclear complexes [Sm(fod)3(μ-bpp)Sm(fod)3] and [Eu(fod)3(μ-bpp)Eu(fod)3] and their diamagnetic analogue [Lu(fod)3(μ-bpp)Lu(fod)3] (fod is the anion of 6,6,7,7,8,8,8- heptafluoro-2,2-dimethyl-3,5-octanedione (Hfod) and bpp is 2,3-bis(2-pyridyl)pyrazine) are synthesized and thoroughly characterized. The lanthanum gave a 1:1 adduct of La(fod)3 and bpp with the molecular formula of [La(fod)3bpp]. The 1H NMR and 1H-1H COSY spectra of the complexes were used to assign the proton resonances. In the case of paramagnetic Sm3+ and Eu3+ complexes, the methine (of the fod moiety) and the bpp resonances are shifted in the opposite direction and the paramagnetic shifts are dipolar in nature, which decrease with increasing distance of the proton from the metal ion. The single-crystal X-ray analyses reveal that the complexes (Sm3+ and Eu3+) are dinuclear and crystallize in the triclinic P1 space group. Each metal in a given complex is eight coordinate by coordinating with six oxygen atoms of three fod moieties and two nitrogen atoms of the bpp. Of the two metal centers, in a given complex, one has a distorted square antiprism arrangement and the other acquires a distorted dodecahedron geometry. The Sparkle RM1 and PM7 optimized structures of the complexes are also presented and compared with the crystal structure. Theoretically observed bond distances are in excellent agreement with the experimental values, and the RMS deviations for the optimized structures are 2.878, 2.217, 2.564, and 2.675 Å. The photophysical properties of Sm3+ and Eu3+ complexes are investigated in different solvents, solid, and PMMA-doped thin hybrid films. The spectroscopic parameters (the Judd-Ofelt intensity parameters, radiative parameters, and intrinsic quantum yield) of each Eu3+ sites are calculated using the overlap polyhedra method. The theoretically obtained parameters are close to the experimental results. The lifetime of the excited state is 38.74 μs for Sm3+ and 713.62 μs for the Eu3+ complex in the solid state.
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Ahmad Bhat S, Iftikhar K. Optical Properties of New Terbium(III) Ternary Complexes Containing Anionic 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione and Neutral Sensitizers in Solution, Solid and PMMA Thin Films: Intra and Interphase Colour Tuning. Photochem Photobiol 2021; 97:688-699. [PMID: 33454968 DOI: 10.1111/php.13382] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 01/31/2023]
Abstract
Four new terbium(III) ternary complexes, [Tb(fod)3 (indazole)] (1), [Tb(fod)3 (tptz)] (2), [Tb(fod)3 (impy)] (3) and [Tb(fod)3 (tppo)2 ] (4) with 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione, (Hfod) and N and O donors are synthesized and structurally characterized. The photoluminescence of the complexes are studied in solid, chloroform solution and thin PMMA hybrid films (PMMA is a poly(methyl methacrylate)). The ligand-based emission is dominant in solution of 3 and 4. The effect of ancillary ligands on the photoluminescence of terbium(III) ion is investigated. The mechanism of energy transfer is discussed and correlates the luminescence of acceptor terbium ion with the triplet state energy level of donor ligands. Among the four complexes studied, the luminescence from 1 is most intense followed by 2, 4 and 3. The Commission International de I'Eclairage (CIE) color coordinates of these complexes are calculated and presented. The complexes 3 and 4 show intraphase color tuning when excited under different UV wavelengths. The emission color of [Tb(fod)3 (tppo)2 ] (4) changes from pure blue to turquoise green via almost pure white under 360, 328 and 280 nm UV excitation wavelengths respectively. The [Tb(fod)3 (impy)] (3) show similar results. The complex [Tb(fod)3 (tptz)] (2) displays interphase color tuning from yellow (solution) to turquoise green (solid) and fascinatingly incorporation of complex in PMMA polymer generates white light under same excitation wavelength (360 nm).
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Affiliation(s)
- Shabir Ahmad Bhat
- Lanthanide Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New-Delhi, India
| | - Khalid Iftikhar
- Lanthanide Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New-Delhi, India
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Organometallic complexes of neodymium: an overview of synthetic methodologies based on coordinating elements. REV INORG CHEM 2021. [DOI: 10.1515/revic-2020-0019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Abstract
Organometallic complexes of neodymium have unique coordinating ability to form both micro and macromolecules as well as metal-based polymers. These complexes have been reported in different fields and play a tremendous role in luminescence, catalytic, biological and magnetic applications. So, the current study will comprise all possible routes for the synthesis of organometallic complexes of neodymium. Neodymium complexes have been synthesized of single, double, triple and tetra linkages with H, C, N, O as well as S, B, and X. The detailed synthetic routes have been classified into four categories but in brief, neodymium forms complexes by reacting metal chloride, nitrate or oxide (hydrated or dehydrated) as precursor along with appropriate ligand. Most applied solvents for neodymium complexes were Toluene and THF. These complexes required a range of temperature based on the nature of complexes as well as linkages. The authors have surveyed the research work published through 2011–2020 and provide a comprehensive overview to understand the synthetic routes of organometallic complexes of neodymium.
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Madanhire T, Pereira MC, Davids H, Hosten EC, Abrahams A. Lanthanide(III) complexes with N-(2,6-dimethylphenyl)oxamate and 1,10-phenanthroline: Synthesis, characterisation and cytotoxicity against MCF-7, HEC-1A and THP-1 cell lines. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Madanhire T, Davids H, Pereira MC, Hosten EC, Abrahams A. Lanthanide complexes with N-(2,6-dimethylphenyl)oxamate: Synthesis, characterisation and cytotoxicity. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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17
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Li Y, Ren N, He S, Wang S, Zhang J. Construction of lanthanide complexes supported by 2,3‐dimethoxybenzoic acid and 5,5’‐dimethy‐2,2’‐bipyridine: crystal structures, thermoanalysis, magnetic and fluorescence properties. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ying‐Ying Li
- Testing and Analysis CenterHebei Normal University Shijiazhuang 050024 P. R. China
- College of Chemistry& Material ScienceHebei Normal University Shijiazhuang 050024 P. R. China
| | - Ning Ren
- College of Chemical engineering& Material, Hebei Key Laboratory of Heterocyclic CompoundsHandan University Handan 056005 P. R. China
| | - Shu‐Mei He
- Testing and Analysis CenterHebei Normal University Shijiazhuang 050024 P. R. China
| | - Shu‐Ping Wang
- Testing and Analysis CenterHebei Normal University Shijiazhuang 050024 P. R. China
- College of Chemistry& Material ScienceHebei Normal University Shijiazhuang 050024 P. R. China
| | - Jian‐Jun Zhang
- Testing and Analysis CenterHebei Normal University Shijiazhuang 050024 P. R. China
- College of Chemistry& Material ScienceHebei Normal University Shijiazhuang 050024 P. R. China
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Ilmi R, Anjum S, Haque A, Khan MS. A new brilliant red emitting Eu(III) ternary complex and its transparent flexible and photostable poly(urethane) hybrid thin film for optoelectronic applications. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111968] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Leite Silva CMB, Bispo-Jr AG, Canisares FSM, Castilho SA, Lima SAM, Pires AM. Eu 3+ -tetrakis β-diketonate complexes for solid-state lighting application. LUMINESCENCE 2019; 34:877-886. [PMID: 31347269 DOI: 10.1002/bio.3686] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 06/17/2019] [Accepted: 07/01/2019] [Indexed: 11/07/2022]
Abstract
Eu3+ -β-diketonate complexes are used, for example, in solid-state lighting (SSL) or light-converting molecular devices. However, their low emission quantum efficiency due to water molecules coordinated to Eu3+ and low photostability are still problems to be addressed. To overcome such challenges, we synthesized Eu3+ tetrakis complexes based on [Q][Eu(tfaa)4 ] and [Q][Eu(dbm)4 ] (Q1 = C26 H56 N+ , Q2 = C19 H42 N+ , and Q3 = C17 H38 N+ ), replacing the water molecules in the tris stoichiometry. The tetrakis β-diketonates showed desirable thermal stability for SSL and, under excitation at 390 nm, they displayed the characteristic Eu3+ emission in the red spectral region. The quantum efficiencies of the dbm complexes achieved values as high as 51%, while the tfaa complexes exhibited lower quantum efficiencies (28-33%), but which were superior to those reported for the tris complexes. The structures were evaluated using the Sparkle/PM7 model and comparing the theoretical and the experimental Judd-Ofelt parameters. [Q1][Eu(dbm)4 ] was used to coat a near-UV light-emitting diode (LED), producing a red-emitting LED prototype that featured the characteristic emission spectrum of [Q1][Eu(dbm)4 ]. The emission intensity of this prototype decreased only 7% after 30 h, confirming its high photostability, which is a notable result considering Eu3+ complexes, making it a potential candidate for SSL.
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Affiliation(s)
- Camila M B Leite Silva
- School of Technology and Sciences, São Paulo State University (Unesp), Presidente Prudente, SP, Brazil
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (Unesp), São José do Rio Preto, SP, Brazil
| | - Airton G Bispo-Jr
- School of Technology and Sciences, São Paulo State University (Unesp), Presidente Prudente, SP, Brazil
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (Unesp), São José do Rio Preto, SP, Brazil
| | - Felipe S M Canisares
- School of Technology and Sciences, São Paulo State University (Unesp), Presidente Prudente, SP, Brazil
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (Unesp), São José do Rio Preto, SP, Brazil
| | - Shirley A Castilho
- School of Technology and Sciences, São Paulo State University (Unesp), Presidente Prudente, SP, Brazil
| | - Sergio A M Lima
- School of Technology and Sciences, São Paulo State University (Unesp), Presidente Prudente, SP, Brazil
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (Unesp), São José do Rio Preto, SP, Brazil
| | - Ana M Pires
- School of Technology and Sciences, São Paulo State University (Unesp), Presidente Prudente, SP, Brazil
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (Unesp), São José do Rio Preto, SP, Brazil
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Ilmi R, Kansız S, Dege N, Khan MS. Synthesis, structure, Hirshfeld surface analysis and photophysical studies of red emitting europium acetylacetonate complex incorporating a phenanthroline derivative. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.03.036] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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21
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Ilmi R, Haque A, Khan MS. Synthesis and photo-physics of red emitting europium complexes: An estimation of the role of ancillary ligand by chemical partition of radiative decay rate. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.10.042] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Bhat SA, Iftikhar K. Synthesis, characterization, photoluminescence and intensity parameters of high quantum efficiency pure-red emitting Eu( iii) fluorinated β-diketone complexes. NEW J CHEM 2019. [DOI: 10.1039/c9nj00697d] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The high quantum efficiency mononuclear 7-, 8- and 9-coordinate complexes of tris(heptafluoro-dimethyl-octanedionato)Eu(iii) and 1H-indazole, 2-(1H-imidazol-2-yl)pyridine and 2,4,6-tris(2-pyridyl)-s-triazine are synthesized and thoroughly characterized.
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Affiliation(s)
- Shabir Ahmad Bhat
- Lanthanide Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia
- New-Delhi 110025
- India
| | - Khalid Iftikhar
- Lanthanide Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia
- New-Delhi 110025
- India
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Ilmi R, Ganaie AB, Iftikhar K. 1H NMR of paramagnetic Lanthanide(III) complexes of trifluoroacetylacetone and 2,2′-Bipyridyl and 4f-4f absorption studies. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.07.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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24
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Photoluminescence of europium and terbium trifluoroacetylacetonates. Participation of LMCT state in processes of the energy transfer to Eu3+ ion. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.06.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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25
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Tanner PA, Zhou L, Duan C, Wong KL. Misconceptions in electronic energy transfer: bridging the gap between chemistry and physics. Chem Soc Rev 2018; 47:5234-5265. [PMID: 29938282 DOI: 10.1039/c8cs00002f] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Many treatments of energy transfer (ET) phenomena in current literature employ incorrect arguments and formulae and are not quantitative enough. This is unfortunate because we witness important breakthroughs from ET experiments in nanoscience. This review aims to clarify basic principles by focusing upon Förster-Dexter electric dipole-electric dipole (ED-ED) ET. The roles of ET in upconversion, downconversion and the antenna effect are described and the clichés and simple formulae to be avoided in ET studies are highlighted with alternative treatments provided.
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Affiliation(s)
- Peter A Tanner
- Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon, Hong Kong S.A.R., P. R. China.
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26
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Synthesis and photoluminescence properties of pink luminescent heteroleptic Sm(III) complexes; the role of DMSO in transforming the inner coordination sphere and on photophysical properties. Sparkle/RM1 calculation. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.01.035] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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27
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Ogata S, Ishii A, Lu C, Kondo T, Yajima N, Hasegawa M. Polymorphism-based luminescence of lanthanide complexes with a deuterated 1,10-phenanthroline. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2016.10.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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28
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Ma Y, Yang YS, Jiang YH, Li YX, Liu M, Li ZF, Han HL, Yang YP, Xin XL, Jin QH. Lanthanide contraction and chelating effect on a new family of lanthanide complexes with tetrakis(O-isopropyl)methyle-nediphosphonate: synthesis, structures and terahertz time-domain spectroscopy. RSC Adv 2017. [DOI: 10.1039/c7ra07888a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Sixteen lanthanide–diphosphate complexes have been synthesized by the reaction of lanthanide chlorides and tetrakis(O-isopropyl)methylenediphosphonate ligand in the solvent of acetonitrile (with ethanol or DMF) at room temperature.
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Affiliation(s)
- Yan Ma
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- China
| | - Yong-Sheng Yang
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- China
| | - Yu-Han Jiang
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- China
| | - Yue-Xue Li
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- China
| | - Min Liu
- The College of Materials Science and Engineering
- Beijing University of Technology
- Beijing 100022
- China
| | - Zhong-Feng Li
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- China
| | - Hong-Liang Han
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- China
| | - Yu-Ping Yang
- School of Science
- Minzu University of China
- Beijing 100081
- China
| | - Xiu-Lan Xin
- School of Food and Chemical Engineering
- Beijing Technology and Business University
- Beijing 100048
- China
| | - Qiong-Hua Jin
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- China
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29
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Shin JD, Lim WJ, Yu KS, Lee JH, Lee NS, Jeong YG, Han SY, Kim DK. Luminescent polystyrene latex nanoparticles doped with β-diketone europium chelate and methacrylic acid. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.08.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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30
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Dar WA, Iftikhar K. Phase controlled colour tuning of samarium and europium complexes and excellent photostability of their PVA encapsulated materials. Structural elucidation, photophysical parameters and the energy transfer mechanism in the Eu3+ complex by Sparkle/PM3 calculations. Dalton Trans 2016; 45:8956-71. [DOI: 10.1039/c6dt00549g] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Luminescence and photostability of new Sm and Eu complexes and those of their thin hybrid films have been investigated and discussed.
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Affiliation(s)
- Wakeel Ahmed Dar
- Lanthanide Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia
- New Delhi 110 025
- India
| | - K. Iftikhar
- Lanthanide Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia
- New Delhi 110 025
- India
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