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Hooda A, Singh D, Dalal A, Nehra K, Kumar S, Malik RS, Kumar R, Kumar P. Optical, electrochemical and photophysical analyses of heteroleptic luminescent Ln(iii) complexes for lighting applications. RSC Adv 2023; 13:9033-9045. [PMID: 36950083 PMCID: PMC10025952 DOI: 10.1039/d3ra00214d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 03/10/2023] [Indexed: 03/24/2023] Open
Abstract
A series of lanthanide complexes have been synthesized with fluorinated 1,3-diketones and heteroaromatic ancillary moieties. Spectroscopic studies reveal the attachment of the respective lanthanide ion to the oxygen site of β-diketone and nitrogen site of auxiliary moieties. The conducting behavior of the complexes is proposed by their optical energy gaps which lie in the range of semiconductors. The emission profiles of the lanthanide complexes demonstrate red and green luminescence owing to the distinctive transitions of Sm3+ and Tb3+ ions, respectively. Energy transfer via antenna effect clearly reveals the effective transfer of energy from the chromophoric moiety to the Ln3+ ion. The prepared conducting and luminescent Ln(iii) complexes might be employed as the emitting component in designing OLEDs.
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Affiliation(s)
- Anjli Hooda
- Department of Chemistry, Maharshi Dayanand University Rohtak 124001 India
| | - Devender Singh
- Department of Chemistry, Maharshi Dayanand University Rohtak 124001 India
| | - Anuj Dalal
- Department of Chemistry, Maharshi Dayanand University Rohtak 124001 India
| | - Kapeesha Nehra
- Department of Chemistry, Maharshi Dayanand University Rohtak 124001 India
| | - Sumit Kumar
- Department of Chemistry, DCR University of Science & Technology Murthal Haryana 131039 India
| | - Rajender Singh Malik
- Department of Chemistry, DCR University of Science & Technology Murthal Haryana 131039 India
| | - Ramesh Kumar
- Department of Chemistry, Kurukshetra University Kurukshetra 136119 Haryana India
| | - Parvin Kumar
- Department of Chemistry, Kurukshetra University Kurukshetra 136119 Haryana India
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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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Nehra K, Dalal A, Hooda A, Saini RK, Singh D, Kumar S, Malik RS, Kumar R, Kumar P. Synthesis of green emissive terbium(III) complexes for displays: Optical, electrochemical and photoluminescent analysis. LUMINESCENCE 2023; 38:56-63. [PMID: 36511827 DOI: 10.1002/bio.4423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/31/2022] [Accepted: 12/06/2022] [Indexed: 12/15/2022]
Abstract
A series of heteroleptic terbium(III) complexes with fluorinated 2-thenoyltrifluoroacetone (TTFA) and other heteroaromatic units have been synthesized. The developed heteroleptic complexes were inspected via elemental study, cyclic voltammetry, thermal analysis and spectroscopic investigations. Optical band-gap data proposed the conducting property of prepared complexes. The photoluminescence emission profiles illustrated peaks based on terbium(III) cation (Tb3+ ) positioned at ~617, 586, 546 and 491 nm, imputed to 5 D4 to 7 FJ (J = 3,4,5,6) transitions separately. Most intense peak at 546 nm corresponding to 5 D4 → 7 F5 transition is accountable for the green emissive character of developed complexes. The luminous character of complexes reveals the sensitization of Tb3+ by ligands. Color parameters further corroborates the green emanation of Tb3+ complexes. The photometric characteristics of complexes recommended their usages in designing display devices.
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Affiliation(s)
- Kapeesha Nehra
- Department of Chemistry, Maharshi Dayanand University, Rohtak, India
| | - Anuj Dalal
- Department of Chemistry, Maharshi Dayanand University, Rohtak, India
| | - Anjli Hooda
- Department of Chemistry, Maharshi Dayanand University, Rohtak, India
| | - Raman Kumar Saini
- Department of Chemistry, Maharshi Dayanand University, Rohtak, India
| | - Devender Singh
- Department of Chemistry, Maharshi Dayanand University, Rohtak, India
| | - Sumit Kumar
- Department of Chemistry, DCR University of Science & Technology, Murthal, India
| | | | - Ramesh Kumar
- Department of Chemistry, Kurukshetra University, Kurukshetra, India
| | - Parvin Kumar
- Department of Chemistry, Kurukshetra University, Kurukshetra, India
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Dalal A, Hooda A, Nehra K, Singh D, Kumar S, Malik RS, Kumar P. Effect of substituted 2,2′-bipyridine derivatives on luminescence characteristics of green emissive terbium complexes: Spectroscopic and optical analysis. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133343] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Preparation, optoelectronic and spectroscopic analysis of fluorinated heteroleptic samarium complexes for display applications. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120958] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Dalal A, Nehra K, Hooda A, Bhagwan S, Kumar Saini R, Singh D, Kumar S. Luminescent heteroleptic samarium (III) complexes: Synthesis, optical and photophysical investigation. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109620] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Deep red emissive octacoordinated heteroleptic Sm(III) complexes: Preparation and spectroscopic investigation. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132848] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Dalal A, Nehra K, Hooda A, Singh S, Bhagwan S, Singh D, Kumar S. 2,2′-Bipyridine based fluorinated β-Diketonate Eu(III) complexes as red emitter for display applications. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109399] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Dalal A, Nehra K, Hooda A, Singh D, Dhankhar J, Kumar S. Fluorinated β-diketone-based Sm(III) complexes: spectroscopic and optoelectronic characteristics. LUMINESCENCE 2022; 37:1328-1334. [PMID: 35641133 DOI: 10.1002/bio.4300] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 05/05/2022] [Accepted: 05/25/2022] [Indexed: 12/19/2022]
Abstract
The synthesis and characterization of a series of octa-coordinated Sm(III) complexes with 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione (TFNB) and 2,2'-bipyridine (Bpy) derivatives as ancillary ligand are described here. The complexes were analyzed by elemental, spectroscopic such as infrared spectroscopy, 1 H NMR, and thermogravimetric analyses. The fluorinated TFNB ligand absorbs in the range from 200 to 400 nm. The complexes show the sharp and structured Sm-based emissions in visible region upon irradiation in UV range. Excitation spectra of complexes show similarity to the absorption spectra of ligands suggesting that excitation energy is transferred from ligands to Sm(III) centre by the antenna effect. Photoluminescence emission spectra and colour parameters affirmed that the complexes show luminescence in orange-red region. These luminous Sm(III) complexes might be applied as emissive layer in organic electroluminescent devices.
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Affiliation(s)
- Anuj Dalal
- Department of Chemistry, Maharshi Dayanand University, Rohtak, India
| | - Kapeesha Nehra
- Department of Chemistry, Maharshi Dayanand University, Rohtak, India
| | - Anjli Hooda
- Department of Chemistry, Maharshi Dayanand University, Rohtak, India
| | - Devender Singh
- Department of Chemistry, Maharshi Dayanand University, Rohtak, India
| | - Jyotika Dhankhar
- Department of Food Technology, Maharshi Dayanand University, Rohtak, India
| | - Sumit Kumar
- Department of Chemistry, DCR University of Science & Technology, Murthal, Haryana, India
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Dalal A, Nehra K, Hooda A, Singh D, Kumar S, Malik RS. Red Emissive Ternary Europium Complexes: Synthesis, Optical and Luminescent Characteristics. LUMINESCENCE 2022; 37:1309-1320. [DOI: 10.1002/bio.4297] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 04/21/2022] [Accepted: 05/26/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Anuj Dalal
- Department of Chemistry Maharshi Dayanand University Rohtak India
| | - Kapeesha Nehra
- Department of Chemistry Maharshi Dayanand University Rohtak India
| | - Anjli Hooda
- Department of Chemistry Maharshi Dayanand University Rohtak India
| | - Devender Singh
- Department of Chemistry Maharshi Dayanand University Rohtak India
| | - Sumit Kumar
- Department of Chemistry DCR University of Science & Technology Murthal Haryana India
| | - Rajender Singh Malik
- Department of Chemistry DCR University of Science & Technology Murthal Haryana India
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Preparation, spectroscopic and thermal investigation of fluorinated Sm(III) β-diketonates with bidentate N donor ligands. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139672] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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12
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Bedi M, Punia M, Devi R, Taxak V, Khatkar S, Boora Doon P. Photophysical investigations of red light emanating Eu(III) complexes with dioxoester functionalized ligand for optoelectronic applications. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Dalal A, Nehra K, Hooda A, Singh S, Singh D, Kumar S. Synthesis, Optoelectronic and Photoluminescent Characterizations of Green Luminous Heteroleptic Ternary Terbium Complexes. J Fluoresc 2022; 32:1019-1029. [DOI: 10.1007/s10895-022-02920-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 03/01/2022] [Indexed: 01/31/2023]
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14
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Nehra K, Dalal A, Hooda A, Kumar Saini R, Singh D, Kumar S. Synthesis and Photoluminescence Characterization of the Complexes of Samarium Dibenzoylmethanates with 1,10-Phenanthroline Derivatives. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115730] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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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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Aleem AR, Liu J, Wang J, Wang J, Zhao Y, Wang Y, Wang Y, Wang W, Rehman FU, Kipper MJ, Tang J. Selective Sensing of Cu 2+ and Fe 3+ Ions with Vis-Excitation using Fluorescent Eu 3+-Induced Aggregates of Polysaccharides (EIAP) in Mammalian Cells and Aqueous Systems. JOURNAL OF HAZARDOUS MATERIALS 2020; 399:122991. [PMID: 32937702 DOI: 10.1016/j.jhazmat.2020.122991] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/02/2020] [Accepted: 05/17/2020] [Indexed: 06/11/2023]
Abstract
Fluorescent lanthanide complexes have favorable features for fluorescence-based sensors compared to organic fluorophores and quantum dots. They exhibit very long fluorescence lifetimes, sharp emission bands, and stability with respect to photo-bleaching, without blinking. However, these complexes are usually hydrophobic, and many are excited by UV light, making them hazardous and incompatible with aqueous environments and biological samples. In this work, the strong fluorescent Eu3+-induced aggregates of polysaccharides (EIAP) was used to improve their aqueous solubility, and to tune the appropriate excitation wavelength in the visible range for avoiding toxicity of UV light in biological applications. The complexes exhibit bright fluorescence with an excitation maximum in the visible range, near 405 nm. EIAP 3 also exhibit rapid quenching response in the presence of transition metal ions. This enables the detection of Cu2+ and Fe3+ below 1 ppm. The reverse of quenching response of copper by the addition of a chelating agent makes it possible to recover the fluorescence property. Successfully, the EIAP exhibit cytocompatibility with mammalian cells. Thus, these new polysaccharide-based complexes have the potential for rapid, sensitive and selective metal ion sensors for the environmental systems.
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Affiliation(s)
- Abdur Raheem Aleem
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Technology Cooperation on Hybrid Materials, Qingdao University, 308 Ningxia Road, Qingdao, 266071, People's Republic of China
| | - Jin Liu
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Technology Cooperation on Hybrid Materials, Qingdao University, 308 Ningxia Road, Qingdao, 266071, People's Republic of China
| | - Jing Wang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Technology Cooperation on Hybrid Materials, Qingdao University, 308 Ningxia Road, Qingdao, 266071, People's Republic of China
| | - Jing Wang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Technology Cooperation on Hybrid Materials, Qingdao University, 308 Ningxia Road, Qingdao, 266071, People's Republic of China
| | - Yue Zhao
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Technology Cooperation on Hybrid Materials, Qingdao University, 308 Ningxia Road, Qingdao, 266071, People's Republic of China
| | - Yao Wang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Technology Cooperation on Hybrid Materials, Qingdao University, 308 Ningxia Road, Qingdao, 266071, People's Republic of China
| | - Yanxin Wang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Technology Cooperation on Hybrid Materials, Qingdao University, 308 Ningxia Road, Qingdao, 266071, People's Republic of China
| | - Wei Wang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Technology Cooperation on Hybrid Materials, Qingdao University, 308 Ningxia Road, Qingdao, 266071, People's Republic of China
| | - Faisal Ul Rehman
- Department of Medical Oncology, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266003, People's Republic of China
| | - Matt J Kipper
- Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, Colorado, 80523, USA
| | - Jianguo Tang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Technology Cooperation on Hybrid Materials, Qingdao University, 308 Ningxia Road, Qingdao, 266071, People's Republic of China.
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Georgieva I, Zahariev T, Aquino AJA, Trendafilova N, Lischka H. Energy transfer mechanism in luminescence Eu(III) and Tb(III) complexes of coumarin-3-carboxylic acid: A theoretical study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 240:118591. [PMID: 32585405 DOI: 10.1016/j.saa.2020.118591] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 06/03/2020] [Accepted: 06/06/2020] [Indexed: 06/11/2023]
Abstract
Excited state energy level diagrams of coumarin-3-carboxylic acid (HCCA) chromophore, Eu(CCA)Cl2(H2O)2 (1), Eu(CCA)2Cl(H2O)2 (2), Eu(CCA)3(H2O)3 (3), Tb(CCA)2Cl(H2O) (4) and Tb(CCA)2(NO3)(H2O) (5) in gas phase and polar solution have been calculated by means of DFT/TDDFT/ωB97XD methods. Based on these results, the ability of CCA to sensitize Eu(III) and Tb(III) luminescence has been examined. The competitive excited state processes in the complexes - fluorescence, intersystem crossing (ISC) and phosphorescence, were analyzed depending on the environment, number of the ligands, Ln(III) ion type (Eu and Tb) and counteranion (Cl- and NO3-). It has been found that the environment altered the S1 state energy, oscillator strength, fluorescence lifetime as well as the S1 character - polar solution stabilized the S1(ππ*) state, whereas non-polar solution (gas phase, solid state) stabilized the S1(nπ*) state. The S1(nπ*) state was decisive for the efficient energy transfer as it suppressed the S1 emission of CCA and favored ISC or direct transfer to the emitting levels of Eu(III). The HCCA triplet (T1) state minimum energy (~2.7, ~2.6ZPE eV) and (ππ*) character were retained in Eu/Tb-CCA complexes regardless of the environment. The energy gap between the higher energy T1 donor state and the acceptor levels 5D1 of Eu(III) (~0.5 eV) and 5D4 of Tb(III) (~0.1 eV) provided optimal resonance conditions for effective energy transfer for Eu(III), but less probability for Tb(III). The nonradiative energy (CCA → Eu(III)) transfer rates and quantum luminescence yield for 2 and 3 were calculated by a strategy combining DFT geometries, INDO/S excitation energies and calculated Judd-Ofelt parameters. The excitation channel T1 → 5D0 through an exchange mechanism was predicted as the most probable one to populate the main emissive Eu-centered state in complexes 2 and 3. The more efficient luminescence of 3 than that of 2 was discussed and explained.
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Affiliation(s)
- Ivelina Georgieva
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev, Str. Bld 11, Sofia 1113, Bulgaria.
| | - Tsvetan Zahariev
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev, Str. Bld 11, Sofia 1113, Bulgaria
| | - Adelia J A Aquino
- Department of Mechanical Engineering, Texas Tech University, Lubbock, TX 79409, USA; School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Natasha Trendafilova
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev, Str. Bld 11, Sofia 1113, Bulgaria
| | - Hans Lischka
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China; Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, USA
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Omagari S, Vacha M. Toward accurate measurement of the intrinsic quantum yield of lanthanide complexes with back energy transfer. Phys Chem Chem Phys 2020; 22:3683-3690. [DOI: 10.1039/c9cp06294g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work theoretically shows that the intrinsic quantum yields are different between ligand excitation and direct lanthanide excitation in the presence of back energy transfer.
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Affiliation(s)
- Shun Omagari
- Department of Materials Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - Martin Vacha
- Department of Materials Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
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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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21
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Ilmi R, Khan MS, Li Z, Zhou L, Wong WY, Marken F, Raithby PR. Utilization of Ternary Europium Complex for Organic Electroluminescent Devices and as a Sensitizer to Improve Electroluminescence of Red-Emitting Iridium Complex. Inorg Chem 2019; 58:8316-8331. [DOI: 10.1021/acs.inorgchem.9b00303] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Rashid Ilmi
- Department of Chemistry, Sultan Qaboos University, P.O. Box 36, Al Khod 123, Sultanate of Oman
| | - Muhammad S. Khan
- Department of Chemistry, Sultan Qaboos University, P.O. Box 36, Al Khod 123, Sultanate of Oman
| | - Zhenzhen Li
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, People’s Republic of China
| | - Liang Zhou
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, People’s Republic of China
| | - Wai-Yeung Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon Hong Kong
| | - Frank Marken
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | - Paul R. Raithby
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
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22
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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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23
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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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24
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Zhu MM, Zhang Z, Ren N, Wang SP, Zhang JJ. Rare earth complexes with 3,4-dimethylbenzoic acid and 2,2:6′,2″-terpyridine: Synthesis, crystal structures, luminescence and thermodynamic properties. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.09.061] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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25
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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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26
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Hasan N, Iftikhar K. Synthesis, crystal structure and photoluminescence studies of [Eu(dbm)3(impy)] and its polymer-based hybrid film. NEW J CHEM 2019. [DOI: 10.1039/c8nj04560g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An eight-coordinate Eu(iii) complex with 1,3-dibenzoylmethane (Hdbm) and 2-(1H-imidazol-2-yl)pyridine (impy), [Eu(dbm)3(impy)], was synthesized and characterized via elemental analysis, FTIR spectroscopy, ESI-MS+ studies and thermal analysis (TGA/DTA).
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Affiliation(s)
- Najmul Hasan
- Lanthanide Research Laboratory
- Department of Chemistry Jamia Millia Islamia
- New Delhi 110 025
- India
| | - Khalid Iftikhar
- Lanthanide Research Laboratory
- Department of Chemistry Jamia Millia Islamia
- New Delhi 110 025
- India
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27
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Abbas Z, Dasari S, Beltrán-Leiva MJ, Cantero-López P, Páez-Hernández D, Arratia-Pérez R, Butcher RJ, Patra AK. Luminescent europium(iii) and terbium(iii) complexes of β-diketonate and substituted terpyridine ligands: synthesis, crystal structures and elucidation of energy transfer pathways. NEW J CHEM 2019. [DOI: 10.1039/c9nj02838b] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A series of coordinatively saturated LnIII complexes: [Ln(R-TPY)(TTA)3] (1–6) were designed and structurally characterized and plausible energy transfer (ET) pathways determined using a theoretical method.
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Affiliation(s)
- Zafar Abbas
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Srikanth Dasari
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - María J. Beltrán-Leiva
- Relativistic Molecular Physics (ReMoPh) Group
- Ph.D. Program in Molecular Physical Chemistry
- Universidad Andrés Bello
- Santiago 8370146
- Chile
| | - Plinio Cantero-López
- Relativistic Molecular Physics (ReMoPh) Group
- Ph.D. Program in Molecular Physical Chemistry
- Universidad Andrés Bello
- Santiago 8370146
- Chile
| | - Dayán Páez-Hernández
- Relativistic Molecular Physics (ReMoPh) Group
- Ph.D. Program in Molecular Physical Chemistry
- Universidad Andrés Bello
- Santiago 8370146
- Chile
| | - Ramiro Arratia-Pérez
- Relativistic Molecular Physics (ReMoPh) Group
- Ph.D. Program in Molecular Physical Chemistry
- Universidad Andrés Bello
- Santiago 8370146
- Chile
| | | | - Ashis K. Patra
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
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28
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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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29
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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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30
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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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31
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Effect of 2,4,6-tri(2-pyridyl)-1,3,5-triazine on visible and NIR luminescence of lanthanide tris(trifluoroacetylacetonates). J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.06.031] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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32
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Oylumluoglu G, Coban MB, Kocak C, Aygun M, Kara H. 2-and 1-D coordination polymers of Dy(III) and Ho(III) with near infrared and visible luminescence by efficient charge-transfer antenna ligand. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.06.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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33
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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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