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Ahmed T, Chakraborty A, Baitalik S. Terpyridyl-Imidazole Based Ligand Coordinated to Ln(Hexafluoroacetyl acetonate) 3 Core: Synthesis, Structural Characterization, Luminescence Properties, and Thermosensing Behaviors in Solution and PMMA Film. Inorg Chem 2024; 63:11279-11295. [PMID: 38822820 DOI: 10.1021/acs.inorgchem.4c01132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2024]
Abstract
A new array of ternary lanthanide complexes of the form [Ln(hfa)3(tpy-HImzphen)] have been synthesized and thoroughly characterized wherein Ln = LaIII (1), EuIII (2), SmIII (3), and TbIII (4); hfa = hexafluoroacetylacetonate; and tpy-HImzphen = 2-(4-[2,2':6',2″]terpyridin-4'-yl-phenyl)-1H-phenanthro[9,10-d]imidazole. Incorporation of tpy-HImzphen onto the Ln-hfa moiety induced a bathochromic shift of the absorption window of the complexes into the visible region. Extensive investigations of the luminescence characteristics have been conducted both at RT and at 77 K to understand the deactivation pathways of the complexes. Both steady-state and time-resolved emission spectral behaviors indicate four distinctive behaviors upon incorporation of tpy-HImzphen onto the lanthanide core, viz., a huge red-shift of the ligand-centered peak for LaIII; almost complete energy transfer for EuIII; very little energy transfer for SmIII, while reverse energy transfer in the case of TbIII. In addition, the EuIII-complex exhibits its excellence in luminescence thermometry in the solution state as well as in poly(methyl methacrylate) (PMMA) thin films. The thermosensitive luminescence response in solution was further utilized to mimic set-reset flip-flop logic operation. A plausible energy transfer scheme has been devised to explain dissimilar luminescence behaviors in the complexes. The role of LMCT was also considered for the observed thermosensing property of the Eu(III) complex.
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Affiliation(s)
- Toushique Ahmed
- Inorganic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Amit Chakraborty
- Inorganic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Sujoy Baitalik
- Inorganic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
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Ahmed T, Chakraborty A, Maity S, Baitalik S. A terpyridyl-imidazole based europium tris-(β-diketonate) complex as an efficient molecular luminescent thermometer and single component white light emitter via synergy in energy transfer between ligands and Eu 3. Dalton Trans 2024. [PMID: 38235760 DOI: 10.1039/d3dt03837h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
The thermosensing and thermochromic behavior of one of our recently reported terpyridyl-imidazole based ternary europium tris-(β-diketonate) complexes of the composition [Eu(tta)3(tpy-HImzphen)] (tta = 2-thenoyltrifluoroacetone and tpy-HImzphen = 2-(4-[2,2':6',2''] terpyridin-4'-yl-phenyl)-1H-phenanthro[9,10-d]imidazole) has been thoroughly investigated in this work. The said Eu(III) complex exhibits magnificent thermosensing as well as thermochromic properties and can be recommended as an excellent temperature sensor in a wide temperature domain of 273-343 K in terms of both emission intensity ratio (Sm = 5.78% K-1 at Tm = 343 K, δT = 0.012 K) and lifetime values (Sm = 3.36% K-1 at Tm = 333 K, δT = 0.009 K) or even in terms of its emitting color (red at 268 K, violet at 303 K, and blue at 343 K). Additionally, it displays remarkable solvent-induced luminescence behavior by displaying various emitting colors instead of its sole characteristic red emission upon varying the nature of the solvent. Finally, amalgamating these two features, we are able to attain white light emission (Commission Internationale de l'Eclairage coordinates: x = 0.34, y = 0.38) at 283 K from a single component. A plausible energy transfer mechanism has also been proposed in light of the existence of the ligand-to-metal charge transfer (LMCT) state as the quencher.
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Affiliation(s)
- Toushique Ahmed
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata 700032, India.
| | - Amit Chakraborty
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata 700032, India.
| | - Sanchari Maity
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata 700032, India.
| | - Sujoy Baitalik
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata 700032, India.
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Ali A, Ahmed Z, Iftikhar K, Uddin R. Heteroleptic samarium complexes with high quantum yields for temperature sensing applications. Dalton Trans 2024; 53:1105-1120. [PMID: 38099730 DOI: 10.1039/d3dt03160h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
Two new crystallographically characterized samarium complexes, [Sm(fod)3(L1)] (1) and [Sm(fod)3(L2)] (2) {L1 = 4,7-diphenyl-1,10-phenanthroline (bath), L2 = 2,2':6',2''-terpyridine and fod = anion of 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione (Hfod)}, were synthesized and thoroughly characterized. Single-crystal (SC) analysis shows that complex 1 is an eight-coordinate structure with a distorted square antiprism geometry (D4d), whereas complex 2 possesses a nine-coordinate structure with distorted muffin geometry (Cs). The NMR results are in line with SC-XRD analysis, which further validate that the complexes remain intact in solutions. The photophysical characteristics of the complexes were studied in both visible and near infra-red (NIR) regions. The PLQY values of the present complexes were found to be higher than those reported in the literature except for a tetrakis Sm complex. This result indicates that both the ligands act as effective antennas for the present systems. A comparison of PLQY and emission lifetime values within the present complexes (in solid state) reveals that energy transfer from terpy to Sm3+ is more effective than that from the bath ligand. Various color parameters of the complexes were calculated, and the determined CCT values suggest that the complexes may be used as warm light sources. The determined band gap values for the complexes are in the range of those for semiconductors, which suggest the application of present systems in the field of optoelectronics. The curve between the emission intensity and temperature for complex 1 shows a perfect linearity (χ2 = 0.99), which suggests that this complex can have potential application as a temperature sensor in the range 60-350 K.
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Affiliation(s)
- Asgar Ali
- Lanthanide Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
| | - Zubair Ahmed
- Department of Chemistry, School of Basic and Applied Sciences, Galgotias University, Greater Noida, India
| | - Khalid Iftikhar
- Lanthanide Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
| | - Rahis Uddin
- Lanthanide Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
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Ali A, Ahmed Z, Rahisuddin, Iftikhar K. Pure red-light emitting europium based complexes as efficient UV light converters: synthesis, crystal structure and photoluminescence properties. Dalton Trans 2023; 52:14075-14087. [PMID: 37743694 DOI: 10.1039/d3dt01536j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
This paper reports three new crystallographically characterized europium complexes with composition as follows: [Eu(fod)3(L1)] (1), [Eu(fod)3(L2)] (2) and [Eu(fod)3(L3)] (3) {L1 = benzimidazole (bzi), L2 = 4,7-diphenyl-1,10-phenanthroline (bath), L3 = 2-(2-pyridyl) benzimidazole (py-im) and fod = anion of 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione (Hfod)}. The single crystal (SC) XRD analysis shows that complex 1 is seven-coordinated while complexes 2 and 3 are eight-coordinated with the geometrical structures of a mono-capped octahedron and a trigonal dodecahedron, respectively. The NMR spectra of the complexes validate the SC-XRD results in solution. The complexes are stable in solution as no dissociation of any ligand was observed in the NMR spectra of the complexes. The photophysical properties of the complexes in solution, solid state, and PMMA thin films were studied. The hypersensitive transition 5D0 → 7F2 dominates the emission spectra in all phases, showing the highly asymmetric environment around the Eu(III) ion. The bath ligand is found to be the best sensitizer of the Eu ion and hence complex 2 shows the strongest luminescence properties with the highest absolute quantum yield among the three complexes. The CIE coordinate analysis shows that pure red-luminescence is emitted by the Eu complexes in the solid state since the coordinates found in this phase are closer to the standard NTSC 1987 values. The optical band gaps were determined for the complexes and the observed values suggest that the complexes can have possible applications in the field of semiconductor materials.
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Affiliation(s)
- Asgar Ali
- Lanthanide Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
| | - Zubair Ahmed
- Lanthanide Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
- Department of Chemistry, School of Basic and Applied Sciences, Galgotias University, Greater Noida, India
| | - Rahisuddin
- Lanthanide Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
| | - K Iftikhar
- Lanthanide Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi 110025, India.
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Ahmed Z, Carvalho RDS, Dos Santos AM, Gambassi F, Bandini E, Marvelli L, Maini L, Barbieri A, Cremona M. Highly Luminescent Europium(III) Complexes in Solution and PMMA-Doped Films for Bright Red Electroluminescent Devices. Molecules 2023; 28:molecules28114371. [PMID: 37298847 DOI: 10.3390/molecules28114371] [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: 04/29/2023] [Revised: 05/19/2023] [Accepted: 05/24/2023] [Indexed: 06/12/2023] Open
Abstract
This paper reports the synthesis, structure, photophysical, and optoelectronic properties of five eight-coordinate Europium(III) ternary complexes, namely, [Eu(hth)3(L)2], bearing 4,4,5,5,6,6,6-heptafluoro-1-(2-thienyl)-1,3-hexanedione (hth) as a sensitizer and L = H2O (1), dpso (diphenyl sulphoxide, 2), dpsoCH3 (4,4'-dimethyl diphenyl sulfoxide, 3), dpsoCl (bis(4-chlorophenyl)sulphoxide, 4), and tppo (triphenylphosphine oxide, 5) as co-ligands. The NMR and the crystal structure analysis confirmed the eight-coordinate structures of the complexes in solution and in a solid state. Upon UV-excitation on the absorption band of the β-diketonate ligand hth, all complexes showed the characteristic bright red luminescence of the Europium ion. The tppo derivative (5) displayed the highest quantum yield (up to 66%). As a result, an organic light-emitting device, OLED, was fabricated with a multi-layered structure-ITO/MoO3/mCP/SF3PO:[complex 5] (10%)/TPBi:[complex 5] (10%)/TmPyPB/LiF/Al-using complex 5 as the emitting component.
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Affiliation(s)
- Zubair Ahmed
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), Via P. Gobetti 101, 40129 Bologna, Italy
| | - Rafael Dos Santos Carvalho
- Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Gávea, Rua Marques São Vicente 225, Rio de Janeiro 22451-900, Brazil
| | - Aline Magalhães Dos Santos
- Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Gávea, Rua Marques São Vicente 225, Rio de Janeiro 22451-900, Brazil
| | - Francesca Gambassi
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), Via P. Gobetti 101, 40129 Bologna, Italy
| | - Elisa Bandini
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), Via P. Gobetti 101, 40129 Bologna, Italy
| | - Lorenza Marvelli
- Dipartimento di Scienze Chimiche Farmaceutiche ed Agrarie, Università Degli Studi di Ferrara, Via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Lucia Maini
- Dipartimento di Chimica "Giacomo Ciamician", Università Degli Studi di Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Andrea Barbieri
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), Via P. Gobetti 101, 40129 Bologna, Italy
| | - Marco Cremona
- Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Gávea, Rua Marques São Vicente 225, Rio de Janeiro 22451-900, Brazil
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Karachousos-Spiliotakopoulos K, Tangoulis V, Panagiotou N, Tasiopoulos A, Nastopoulos V, Moreno-Pineda E, Wernsdorfer W, Schulze M, Botas AMP, Carlos LD. Lanthanide Luminescence Thermometry and Slow Magnetic Relaxation in 3-D Polycyanidometallate-Based Materials. Inorg Chem 2022; 61:18629-18639. [DOI: 10.1021/acs.inorgchem.2c03128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Vassilis Tangoulis
- Department of Chemistry, Laboratory of Inorganic Chemistry, University of Patras, 26504Patras, Greece
| | - Nikos Panagiotou
- Department of Chemistry, University of Cyprus, Nicosia1678, Cyprus
| | | | - Vassilis Nastopoulos
- Department of Chemistry, Laboratory of Inorganic Chemistry, University of Patras, 26504Patras, Greece
| | - Eufemio Moreno-Pineda
- Departamento de Química-Física, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Panama City0824, Panama
| | - Wolfgang Wernsdorfer
- Institute for Quantum Materials and Technology (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344Eggenstein-Leopoldshafen, Germany
- Physikalisches Institut, Karlsruhe Institute of Technology, D-76131Karlsruhe, Germany
| | - Michael Schulze
- Physikalisches Institut, Karlsruhe Institute of Technology, D-76131Karlsruhe, Germany
| | - Alexandre M. P. Botas
- Phantom-g, CICECO − Aveiro Institute of Materials, Department of Physics, University of Aveiro, 3810-193Aveiro, Portugal
- i3N-Institute for Nanostructures, Nanomodelling and Nanofabrication, Department of Physics, University of Aveiro, 3810-193Aveiro, Portugal
| | - Luis D. Carlos
- Phantom-g, CICECO − Aveiro Institute of Materials, Department of Physics, University of Aveiro, 3810-193Aveiro, Portugal
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7
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Karachousos-Spiliotakopoulos K, Tangoulis V, Panagiotou N, Tasiopoulos A, Moreno-Pineda E, Wernsdorfer W, Schulze M, Botas AMP, Carlos LD. Luminescence thermometry and field induced slow magnetic relaxation based on a near infrared emissive heterometallic complex. Dalton Trans 2022; 51:8208-8216. [PMID: 35546570 DOI: 10.1039/d2dt00936f] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The 1 : 1 : 1 reaction of YbCl3·6H2O, K3[Co(CN)6] and bpyO2 in H2O has provided access to a complex with formula [YbCo(CN)6(bpyO2)2(H2O)3]·4H2O (1) in a very good yield while its structure has been determined by single-crystal X-ray crystallography and characterised based on elemental analyses and IR spectra. Magnetic susceptibility studies showed the complex to be a field induced single molecule magnet, as confirmed by μ-SQUID measurements. CASSCF calculations confirm the existence of a mJ = 7/2 ground state, with rather large transverse components, responsible for the fast relaxation characteristic of compound 1 at zero DC field, which is reduced upon application of DC fields. Moreover, a combination of luminescence studies along with CASSCF calculation allows the identification of the band structure of the complex, which is ultimately related to its electronic properties. Compound 1 operates as a luminescent thermometer in the 125-300 K range with a maximum relative thermal sensitivity of ≈0.1% K-1 at 180 K.
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Affiliation(s)
| | - Vassilis Tangoulis
- Department of Chemistry, Laboratory of Inorganic Chemistry, University of Patras, 26504, Patras, Greece.
| | - Nikos Panagiotou
- Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus
| | | | - Eufemio Moreno-Pineda
- Depto. de Química-Física, Escuela de Química, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Panamá, Panamá
| | - Wolfgang Wernsdorfer
- Institute for Quantum Materials and Technology (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany.,Physikalisches Institut, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
| | - Michael Schulze
- Physikalisches Institut, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
| | - Alexandre M P Botas
- Phantom-g, CICECO - Aveiro Institute of Materials, Department of Physics, University of Aveiro, 3810-193 - Aveiro, Portugal
| | - Luis D Carlos
- Phantom-g, CICECO - Aveiro Institute of Materials, Department of Physics, University of Aveiro, 3810-193 - Aveiro, Portugal
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Bashir Ganaie A, Iftikhar K. Stoichiometrically controlled synthesis and comparative study of photoluminescence of seven and eight coordinate complexes of Sm3+, Eu3+ and Tb3+ based on 6,6,7,7,8,8,8- heptafluoro-2,2-dimethyl-3,5-octanedione (Hfod) and imidazole. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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9
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Ahmed Z, Ali A, Iftikhar K. Structure elucidation by Sparkle/RM1, and solution behavior of lanthanideIII complexes: NMR, 4f‒4f absorption spectra and Photoluminescent properties. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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10
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Tangoulis V, Nastopoulos V, Panagiotou N, Tasiopoulos A, Itskos G, Athanasiou M, Moreno-Pineda E, Wernsdorfer W, Schulze M, Malina O. High-Performance Luminescence Thermometer with Field-Induced Slow Magnetic Relaxation Based on a Heterometallic Cyanido-Bridged 3d–4f Complex. Inorg Chem 2022; 61:2546-2557. [DOI: 10.1021/acs.inorgchem.1c03432] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | | | - Nikos Panagiotou
- Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus
| | | | - Grigorios Itskos
- Experimental Condensed Matter Physics Laboratory, Department of Physics, University of Cyprus, Nicosia 1678, Cyprus
| | - Modestos Athanasiou
- Experimental Condensed Matter Physics Laboratory, Department of Physics, University of Cyprus, Nicosia 1678, Cyprus
| | - Eufemio Moreno-Pineda
- Depto. de Química-Física, Escuela de Química, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Panamá 18233, Panamá
| | - Wolfgang Wernsdorfer
- Institute for Quantum Materials and Technology (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
- Physikalisches Institut, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
| | - Michael Schulze
- Physikalisches Institut, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
| | - Ondřej Malina
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Olomouc 771 47, Czech Republic
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Eliseeva SV, Nguyen TN, Kampf JW, Trivedi ER, Pecoraro VL, Petoud S. Tuning the photophysical properties of lanthanide(iii)/zinc(ii) ‘encapsulated sandwich’ metallacrowns emitting in the near-infrared range. Chem Sci 2022; 13:2919-2931. [PMID: 35382470 PMCID: PMC8905956 DOI: 10.1039/d1sc06769a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 01/22/2022] [Indexed: 11/21/2022] Open
Abstract
A family of Zn16Ln(HA)16 metallacrowns (MCs; Ln = YbIII, ErIII, and NdIII; HA = picoline- (picHA2−), pyrazine- (pyzHA2−), and quinaldine- (quinHA2−) hydroximates) with an ‘encapsulated sandwich’ structure possesses outstanding luminescence properties in the near-infrared (NIR) and suitability for cell imaging. Here, to decipher which parameters affect their functional and photophysical properties and how the nature of the hydroximate ligands can allow their fine tuning, we have completed this Zn16Ln(HA)16 family by synthesizing MCs with two new ligands, naphthyridine- (napHA2−) and quinoxaline- (quinoHA2−) hydroximates. Zn16Ln(napHA)16 and Zn16Ln(quinoHA)16 exhibit absorption bands extended into the visible range and efficiently sensitize the NIR emissions of YbIII, ErIII, and NdIII upon excitation up to 630 nm. The energies of the lowest singlet (S1), triplet (T1) and intra-ligand charge transfer (ILCT) states have been determined. LnIII-centered total (QLLn) and intrinsic (QLnLn) quantum yields, sensitization efficiencies (ηsens), observed (τobs) and radiative (τrad) luminescence lifetimes have been recorded and analyzed in the solid state and in CH3OH and CD3OD solutions for all Zn16Ln(HA)16. We found that, within the Zn16Ln(HA)16 family, τrad values are not constant for a particular LnIII. The close in energy positions of T1 and ILCT states in Zn16Ln(picHA)16 and Zn16Ln(quinHA)16 are preferred for the sensitization of LnIII NIR emission and ηsens values reach 100% for NdIII. Finally, the highest values of QLLn are observed for Zn16Ln(quinHA)16 in the solid state or in CD3OD solutions. With these data at hand, we are now capable of creating MCs with desired properties suitable for NIR optical imaging. We have created a family of ‘encapsulated sandwich’ Zn16Ln(HA)16 metallacrowns and by detailed quantitative analysis demonstrated how the nature of the hydroximate ligand impacts photophysical properties of these complexes.![]()
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Affiliation(s)
- Svetlana V. Eliseeva
- Centre de Biophysique Moléculaire, CNRS UPR 4301, F-45071 Orléans, Cedex 2, France
| | - Tu N. Nguyen
- Department of Chemistry, Willard H. Dow Laboratories, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Jeff W. Kampf
- Department of Chemistry, Willard H. Dow Laboratories, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Evan R. Trivedi
- Department of Chemistry, Willard H. Dow Laboratories, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Vincent L. Pecoraro
- Department of Chemistry, Willard H. Dow Laboratories, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Stéphane Petoud
- Centre de Biophysique Moléculaire, CNRS UPR 4301, F-45071 Orléans, Cedex 2, France
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12
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Kiraev SR, Mathieu E, Kovacs D, Wells JAL, Tomar M, Andres J, Borbas KE. Improved emission of Yb( iii) ions in triazacyclononane-based macrocyclic ligands compared to cyclen-based ones. Dalton Trans 2022; 51:16596-16604. [DOI: 10.1039/d2dt02266d] [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
Yb(iii) complexes were synthesised from ligands with a 1,4,7-triazacyclononane (tacn) macrocyclic core. Tacn-based compounds equipped with 2 picolinate arms were more emissive than their tricarboxamide-cyclen analogues carrying the same antenna.
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Affiliation(s)
- Salauat R. Kiraev
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120, Uppsala, Sweden
| | - Emilie Mathieu
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120, Uppsala, Sweden
| | - Daniel Kovacs
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120, Uppsala, Sweden
| | - Jordann A. L. Wells
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120, Uppsala, Sweden
| | - Monika Tomar
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120, Uppsala, Sweden
| | - Julien Andres
- Chemistry and Chemical Engineering Section, Ecole Polytechnique Fédérale de Lausanne (EPFL), BCH 3311, CH-1015, Lausanne, Switzerland
| | - K. Eszter Borbas
- Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120, Uppsala, Sweden
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Synthesis, structure, phase controlled colour tuning of dinuclear Pr(III) and Tb(III) complexes with fluorinated β-diketone and heterocyclic Lewis base as UV light converters. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115592] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Elenkova D, Lyapchev R, Romanova J, Morgenstern B, Dimitrova Y, Dimov D, Tsvetkov M, Zaharieva J. Luminescent Complexes of Europium (III) with 2-(Phenylethynyl)-1,10-phenanthroline: The Role of the Counterions. Molecules 2021; 26:molecules26237272. [PMID: 34885868 PMCID: PMC8658859 DOI: 10.3390/molecules26237272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/20/2021] [Accepted: 11/27/2021] [Indexed: 12/13/2022] Open
Abstract
New antenna ligand, 2-(phenylethynyl)-1,10-phenanthroline (PEP), and its luminescent Eu (III) complexes, Eu(PEP)2Cl3 and Eu(PEP)2(NO3)3, are synthesized and characterized. The synthetic procedure applied is based on reacting of europium salts with ligand in hot acetonitrile solutions in molar ratio 1 to 2. The structure of the complexes is refined by X-ray diffraction based on the single crystals obtained. The compounds [Eu(PEP)2Cl3]·2CH3CN and [Eu(PEP)2(NO3)3]∙2CH3CN crystalize in monoclinic space group P21/n and P21/c, respectively, with two acetonitrile solvent molecules. Intra- and inter-ligand π-π stacking interactions are present in solid stat and are realized between the phenanthroline moieties, as well as between the substituents and the phenanthroline units. The optical properties of the complexes are investigated in solid state, acetonitrile and dichloromethane solution. Both compounds exhibit bright red luminescence caused by the organic ligand acting as antenna for sensitization of Eu (III) emission. The newly designed complexes differ in counter ions in the inner coordination sphere, which allows exploring their influence on the stability, molecular and supramolecular structure, fluorescent properties and symmetry of the Eu (III) ion. In addition, molecular simulations are performed in order to explain the observed experimental behavior of the complexes. The discovered structure-properties relationships give insight on the role of the counter ions in the molecular design of new Eu (III) based luminescent materials.
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Affiliation(s)
- Denitsa Elenkova
- Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria; (R.L.); (J.R.); (Y.D.); (M.T.); (J.Z.)
- Correspondence: ; Tel.:+359-2-8161325
| | - Rumen Lyapchev
- Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria; (R.L.); (J.R.); (Y.D.); (M.T.); (J.Z.)
| | - Julia Romanova
- Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria; (R.L.); (J.R.); (Y.D.); (M.T.); (J.Z.)
| | - Bernd Morgenstern
- Department of Inorganic Solid-State Chemistry, Saarland University, 66123 Saarbrücken, Germany;
| | - Yana Dimitrova
- Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria; (R.L.); (J.R.); (Y.D.); (M.T.); (J.Z.)
| | - Deyan Dimov
- Institute of Optical Materials and Technologies, Bulgarian Academy of Science, 1113 Sofia, Bulgaria;
| | - Martin Tsvetkov
- Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria; (R.L.); (J.R.); (Y.D.); (M.T.); (J.Z.)
| | - Joana Zaharieva
- Faculty of Chemistry and Pharmacy, Sofia University, 1164 Sofia, Bulgaria; (R.L.); (J.R.); (Y.D.); (M.T.); (J.Z.)
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15
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Qin Z, Yu J, Zhylko V, Dai L. Preparation and Photoluminescence of Europium(III) Complexes with TPPO as Neutral Ligand. RUSS J APPL CHEM+ 2021. [DOI: 10.1134/s1070427221080164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Kocsi D, Kovacs D, Wells JAL, Borbas KE. Reduced quenching effect of pyridine ligands in highly luminescent Ln(III) complexes: the role of tertiary amide linkers. Dalton Trans 2021; 50:16670-16677. [PMID: 34757364 DOI: 10.1039/d1dt02893f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Luminescent Eu(III) and Tb(III) complexes were synthesised from octadentate ligands carrying various carbostyril sensitizing antennae and two bidentate picolinate donors. Antennae were connected to the metal binding site via tertiary amide linkers. Antennae and donors were assembled on a 1,4,7-triazacyclononane (tacn) platform. Solution- and solid-state structures were comparable to those of previously reported complexes with tacn architectures, with nine-coordinate distorted tricapped trigonal prismatic Ln(III) centres, and distinct from those based on 1,4,7,10-tetraazacyclododecane (cyclen) macrocycles. In contrast, the photophysical properties of these tertiary amide tacn-based complexes were more comparable to those of previously reported systems with cyclen ligands, showing efficient Eu(III) and Tb(III) luminescence. This represents an improvement over secondary amide-linked analogues, and is due to a greatly increased sensitization efficiency in the tertiary amide-linked complexes. Tertiary amide-linked Eu(III) and Tb(III) emitters were more photostable than their secondary amide-linked analogues due to the suppression of photoinduced electron transfer and back energy transfer.
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Affiliation(s)
- Daniel Kocsi
- Department of Chemistry, Ångström Laboratory, Box 523, Uppsala University, 75120, Uppsala, Sweden.
| | - Daniel Kovacs
- Department of Chemistry, Ångström Laboratory, Box 523, Uppsala University, 75120, Uppsala, Sweden.
| | - Jordann A L Wells
- Department of Chemistry, Ångström Laboratory, Box 523, Uppsala University, 75120, Uppsala, Sweden.
| | - K Eszter Borbas
- Department of Chemistry, Ångström Laboratory, Box 523, Uppsala University, 75120, Uppsala, Sweden.
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17
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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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18
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Visinescu D, Alexandru MG, Dumitrescu DG, Shova S, Moliner N, Lloret F, Julve M. Cyanido-bridged {Fe IIILn III} heterobimetallic chains assembled through the [Fe III{HB(pz) 3}(CN) 3] − complex as metalloligand: synthesis, crystal structure and magnetic properties. CrystEngComm 2021. [DOI: 10.1039/d1ce00626f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The first isostructural series of cyanido-bridged 3d–4f chains showing a unique zig-zag motif have been obtained by using the heteroleptic [FeIII{HB(pz)3}(CN)3]− complex as a metalloligand towards the preformed [LnIII(bpdo)(NO3)2(H2O)]+ species.
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Affiliation(s)
- Diana Visinescu
- Coordination and Supramolecular Chemistry Laboratory
- “Ilie Murgulescu” Institute of Physical Chemistry
- Romanian Academy
- Bucharest 060021
- Romania
| | - Maria-Gabriela Alexandru
- Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry
- Faculty of Applied Chemistry and Materials Science
- University Politehnica of Bucharest
- 011061 Bucharest
- Romania
| | | | - Sergiu Shova
- “Petru Poni” Institute of Macromolecular Chemistry
- Romanian Academy
- RO-700487 Iasi
- Romania
| | - Nicolás Moliner
- Departament de Química Inorgànica/Instituto de Ciencia Molecular
- Universitat de València
- 46980 Paterna
- Spain
| | - Francesc Lloret
- Departament de Química Inorgànica/Instituto de Ciencia Molecular
- Universitat de València
- 46980 Paterna
- Spain
| | - Miguel Julve
- Departament de Química Inorgànica/Instituto de Ciencia Molecular
- Universitat de València
- 46980 Paterna
- Spain
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19
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Kot K, Oczko G, Puchalska M, Starynowicz P. Relationships between structural and spectroscopic properties of complexes of o-phenanthroline and 2,2′-bipyridine with lanthanide (Ln = Sm, Eu) thiocyanates. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Ahmed Z, Iftikhar K. Blue to near infra-red photoluminescence from distorted SAP (C4V) tris(hexafluoroacetylacetonato)Ho(III) and Tm(III) complexes with indazole. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Francis B, Nolasco MM, Brandão P, Ferreira RAS, Carvalho RS, Cremona M, Carlos LD. Efficient Visible‐Light‐Excitable Eu
3+
Complexes for Red Organic Light‐Emitting Diodes. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000027] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Biju Francis
- Phantom‐g CICECO Aveiro Institute of Materials University of Aveiro 3810‐193 Aveiro Portugal
| | - Mariela M. Nolasco
- Department of Chemistry and CICECO CICECO Aveiro Institute of Materials University of Aveiro 3810‐193 Aveiro Portugal
| | - Paula Brandão
- Department of Chemistry and CICECO CICECO Aveiro Institute of Materials University of Aveiro 3810‐193 Aveiro Portugal
| | - Rute A. S. Ferreira
- Phantom‐g CICECO Aveiro Institute of Materials University of Aveiro 3810‐193 Aveiro Portugal
| | - Rafael S. Carvalho
- Department of Physics CICECO Aveiro Institute of Materials Pontifical Catholic University of Rio de Janeiro Rio de Janeiro Brazil
| | - Marco Cremona
- Department of Physics CICECO Aveiro Institute of Materials Pontifical Catholic University of Rio de Janeiro Rio de Janeiro Brazil
| | - Luís D. Carlos
- Phantom‐g CICECO Aveiro Institute of Materials University of Aveiro 3810‐193 Aveiro Portugal
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22
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Ahmed Z, Mahiya K, Iftikhar K. Structures and pure near-infrared photophysics of erbium and ytterbium( iii) complexes incorporating fluorinated β-diketone and neutral unidentate ligands. NEW J CHEM 2020. [DOI: 10.1039/d0nj02059a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper reports on the synthesis, structures and pure near-infrared photophysical properties of low symmetry Er3+ and Yb3+ β-diketonate ternary complexes.
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Affiliation(s)
- Zubair Ahmed
- Lanthanide Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia
- India
| | - Kuldeep Mahiya
- Department of Chemistry
- F G M Government College
- Adampur, Mandi Adampur
- Hisar-125052
- India
| | - Khalid Iftikhar
- Lanthanide Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia
- India
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23
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Ahmed Z, Avila HC, Carvalho RS, Kai J, Resende JALC, Bandini E, Barbieri A, Cremona M. Bright neodymium complexes for efficient near infra-red organic light emitting diodes. NEW J CHEM 2020. [DOI: 10.1039/d0nj00403k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper reports the synthesis, structures, and photophysical and electroluminescence properties of low symmetry NIR emitting octa- and nona-coordinate Nd tris β-diketonate complexes.
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Affiliation(s)
- Zubair Ahmed
- Department of Physics
- Pontifícia Universidade Católica do Rio de Janeiro
- PUC-Rio
- Rio de Janeiro
- Brazil
| | - Harold C. Avila
- Department of Physics
- Pontifícia Universidade Católica do Rio de Janeiro
- PUC-Rio
- Rio de Janeiro
- Brazil
| | - Rafael S. Carvalho
- Department of Physics
- Pontifícia Universidade Católica do Rio de Janeiro
- PUC-Rio
- Rio de Janeiro
- Brazil
| | - Jiang Kai
- Department of Chemistry
- Pontifícia Universidade Católica do Rio de Janeiro
- PUC-Rio
- Rio de Janeiro
- Brazil
| | - J. A. L. C. Resende
- Instituto de Ciências Extas e da Terra, Centro Universitário do Araguaia
- Universidade Federal do Mato Grosso
- Barra do Garças
- Brazil
| | - Elisa Bandini
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF)
- Consiglio Nazionale delle Ricerche (CNR)
- Bologna 40129
- Italy
| | - Andrea Barbieri
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF)
- Consiglio Nazionale delle Ricerche (CNR)
- Bologna 40129
- Italy
| | - Marco Cremona
- Department of Physics
- Pontifícia Universidade Católica do Rio de Janeiro
- PUC-Rio
- Rio de Janeiro
- Brazil
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24
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Trautnitz MFK, Doffek C, Seitz M. Radiative Lifetime, Non-Radiative Relaxation, and Sensitization Efficiency in Luminescent Europium and Neodymium Cryptates - The Roles of 2,2'-Bipyridine-N,N'-dioxide and Deuteration. Chemphyschem 2019; 20:2179-2186. [PMID: 31304640 DOI: 10.1002/cphc.201900673] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 07/09/2019] [Indexed: 02/01/2023]
Abstract
Five luminescent tris(bipyridine)-based cryptates with the lanthanoids Eu and Nd have been prepared with a systematic increase in the number of 2,2'-bipyridine-N,N'-dioxide units and with different deuteration levels in the complexing cryptands for the europium species. Careful analysis of the radiative lifetime τrad in these systems reveals that an increase in N-oxide units around the metal centers uniformly lowers τrad by about 30-40 %. The potential involvement of nephelauxetic effects is discussed. Exchange of 30 C-D for C-H oscillators around the europium centers does not affect the radiative lifetimes but decreases non-radiative deactivation and increases the overall luminescence quantum yield in D2 O by 45 %.
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Affiliation(s)
- Markus F K Trautnitz
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
| | - Christine Doffek
- Inorganic Chemistry I, Ruhr-University Bochum, 44780, Bochum, Germany
| | - Michael Seitz
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
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25
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Zakrzewski JJ, Chorazy S, Nakabayashi K, Ohkoshi SI, Sieklucka B. Photoluminescent Lanthanide(III) Single-Molecule Magnets in Three-Dimensional Polycyanidocuprate(I)-Based Frameworks. Chemistry 2019; 25:11820-11825. [PMID: 31206906 DOI: 10.1002/chem.201902420] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Indexed: 01/01/2023]
Abstract
Three-dimensional bimetallic cyanido-bridged frameworks, [LnIII (2,2'-bipyridine N,N'-dioxide)2 (H2 O)][CuI 2 (CN)5 ]⋅5 H2 O (Ln=Dy, 1; Yb, 2), are reported. They exhibit the effect of slow relaxation of magnetization, leading to a magnetic hysteresis loop, and sensitized visible-to-near-infrared photoluminescence. Both physical properties are related to the eight-coordinated lanthanide(III) complexes embedded in the unprecedented coordination skeleton composed of symmetry-breaking polycyanidocuprate linkers. The three-dimensional d-f cyanido-bridged network was shown to serve as an efficient coordination scaffold to achieve emissive lanthanide single-molecule magnets.
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Affiliation(s)
- Jakub J Zakrzewski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland
| | - Szymon Chorazy
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland.,Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Koji Nakabayashi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Shin-Ichi Ohkoshi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Barbara Sieklucka
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland
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26
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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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27
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Gámez-Heredia RG, Cruz-Enríquez A, Aceves R, Höpfl H, Parra-Hake M, Navarro RE, Campos-Gaxiola JJ. Synthesis, structural characterization and photoluminescence properties of mononuclear Eu3+, Gd3+ and Tb3+ complexes derived from cis-(±)-2,4,5-tris(pyridin-2-yl)-imidazoline as ligand. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.10.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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28
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Hasan N, Iftikhar K. Syntheses, crystal structure and photophysical properties of [Sm(dbm)3(impy)] and [Tb(dbm)3(impy)] and their hybrid films. NEW J CHEM 2019. [DOI: 10.1039/c8nj05045g] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper reports the syntheses, crystal structure and photophysical properties of eight-coordinate complexes [Sm(dbm)3(impy)] and [Tb(dbm)3(impy)] (dbm is the anion of 1,3-diphenyl-1,3-propanedione and impy is 2-(1H-imidazol-2-yl)pyridine).
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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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29
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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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30
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Ahmed Z, Iftikhar K. Red, orange-red and near-infrared light emitting ternary lanthanide tris β-diketonate complexes with distortedC4vgeometrical structures. Dalton Trans 2019; 48:4973-4986. [DOI: 10.1039/c9dt00198k] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper presents the photophysical and optoelectronic properties (in the visible to NIR range) of isostructural nona-coordinate Ln complexes with distortedC4vgeometrical structures.
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Affiliation(s)
- Zubair Ahmed
- Lanthanide Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia University
- New Delhi 110 025
- India
| | - Khalid Iftikhar
- Lanthanide Research Laboratory
- Department of Chemistry
- Jamia Millia Islamia University
- New Delhi 110 025
- India
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31
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Zhao ZP, Zheng K, Li HR, Zeng CH, Zhong S, Ng SW, Zheng Y, Chen Y. Structure variation and luminescence of 3D, 2D and 1D lanthanide coordination polymers with 1,3-adamantanediacetic acid. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.06.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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32
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Babel L, Guénée L, Besnard C, Eliseeva SV, Petoud S, Piguet C. Cooperative loading of multisite receptors with lanthanide containers: an approach for organized luminescent metallopolymers. Chem Sci 2017; 9:325-335. [PMID: 29629101 PMCID: PMC5872140 DOI: 10.1039/c7sc03710d] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 10/16/2017] [Indexed: 12/15/2022] Open
Abstract
Metal loading of multi-terdentate receptors with [Eu(pbta)3] provides the first anti-cooperative factors large enough for programming metal alternation in lanthanidopolymers at room temperature.
Metal-containing (bio)organic polymers are materials of continuously increasing importance for applications in energy storage and conversion, drug delivery, shape-memory items, supported catalysts, organic conductors and smart photonic devices. The embodiment of luminescent components provides a revolution in lighting and signaling with the ever-increasing development of polymeric light-emitting devices. Despite the unique properties expected from the introduction of optically and magnetically active lanthanides into organic polymers, the deficient control of the metal loading currently limits their design to empirical and poorly reproducible materials. We show here that the synthetic efforts required for producing soluble multi-site host systems Lk are largely overcome by the virtue of reversible thermodynamics for mastering the metal loading with the help of only two parameters: (1) the affinity of the luminescent lanthanide container for a single binding site and (2) the cooperative effect which modulates the successive fixation of metallic units to adjacent sites. When unsymmetrical perfluorobenzene-trifluoroacetylacetonate co-ligands (pbta–) are selected for balancing the charge of the trivalent lanthanide cations, Ln3+, in six-coordinate [Ln(pbta)3] containers, the explored anti-cooperative complexation processes induce nearest-neighbor intermetallic interactions twice as large as thermal energy at room temperature (RT = 2.5 kJ mol–1). These values have no precedent when using standard symmetrical containers and they pave the way for programming metal alternation in luminescent lanthanidopolymers.
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Affiliation(s)
- Lucille Babel
- Department of Inorganic and Analytical Chemistry , University of Geneva , 30 quai E. Ansermet , CH-1211 Geneva 4 , Switzerland .
| | - Laure Guénée
- Laboratory of Crystallography , University of Geneva , 24 quai E. Ansermet , CH-1211 Geneva 4 , Switzerland
| | - Céline Besnard
- Laboratory of Crystallography , University of Geneva , 24 quai E. Ansermet , CH-1211 Geneva 4 , Switzerland
| | - Svetlana V Eliseeva
- Centre de Biophysique Moléculaire , CNRS UPR 4301 , Rue Charles Sadron , F-45071 Orléans Cedex 2 , France .
| | - Stéphane Petoud
- Centre de Biophysique Moléculaire , CNRS UPR 4301 , Rue Charles Sadron , F-45071 Orléans Cedex 2 , France .
| | - Claude Piguet
- Department of Inorganic and Analytical Chemistry , University of Geneva , 30 quai E. Ansermet , CH-1211 Geneva 4 , Switzerland .
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33
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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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34
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Li XL, Liu YF, Zhang XL, Cheng C, Zheng X, Zhu C, Zhou L. Synthesis, crystal structures, photoluminescent, magnetic and chiroptical properties of two homochiral Er III complexes with different nuclearity. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.02.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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35
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Vats BG, Kannan S, Kumar M, Drew MGB. Ligand-Field Asymmetry-Controlled Luminescent Europium (III) and Samarium(III) Tris(β-diketonate) Complexes of Diphenyl-(2-pyridyl-N-oxide)- Phosphine Oxide. ChemistrySelect 2017. [DOI: 10.1002/slct.201700437] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bal Govind Vats
- Homi Bhabha National Institute; Mumbai
- Fuel Chemistry Division, BARC; Mumbai
| | | | - Mukesh Kumar
- Radiation Biology and Health Sciences Division; Mumbai
| | - Micheal G. B. Drew
- Department of Chemistry; University of Reading; P.O. Box 224, Whiteknights Reading RG6 6AD UK
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36
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Structures and optical spectroscopy of lanthanide trifluoroacetates obtained from hexafluoroacetylacetone. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.03.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Wang Z, Liu N, Li H, Chen P, Yan P. The Role of Blue-Emissive 1,8-Naphthalimidopyridine N
-Oxide in Sensitizing EuIII
Photoluminescence in Dimeric Hexafluoroacetylacetonate Complexes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Zhao Wang
- Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University); Ministry of Education; School of Chemistry and Materials Science; Heilongjiang University; 150080 Harbin PR China
| | - NanNan Liu
- Laboratory for Food Science and Engineering; Harbin University of Commerce; 150076 Harbin PR China
| | - Hongfeng Li
- Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University); Ministry of Education; School of Chemistry and Materials Science; Heilongjiang University; 150080 Harbin PR China
| | - Peng Chen
- Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University); Ministry of Education; School of Chemistry and Materials Science; Heilongjiang University; 150080 Harbin PR China
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; Jilin University; 130012 Changchun PR China
| | - Pengfei Yan
- Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University); Ministry of Education; School of Chemistry and Materials Science; Heilongjiang University; 150080 Harbin PR China
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38
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Hu JY, Ning Y, Meng YS, Zhang J, Wu ZY, Gao S, Zhang JL. Highly near-IR emissive ytterbium(iii) complexes with unprecedented quantum yields. Chem Sci 2017; 8:2702-2709. [PMID: 28694956 PMCID: PMC5480304 DOI: 10.1039/c6sc05021b] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 01/05/2017] [Indexed: 12/22/2022] Open
Abstract
The design of highly near-infrared (NIR) emissive lanthanide (Ln) complexes is challenging, owing to the lack of molecular systems with a high sensitization efficiency and the difficulty of achieving a large intrinsic quantum yield. Previous studies have reported success in optimizing individual factors and achieving high overall quantum yields, with the best yield being 12% for Yb(iii). Herein we report a series of highly NIR emissive Yb complexes, in which the Yb is sandwiched between an octafluorinated porphyrinate antenna ligand and a deuterated Kläui ligand, which allowed optimization of two factors in the same system, and one of the complexes had an unprecedented quantum yield of 63% (estimated uncertainty 15%) in CD2Cl2 with a long lifetime (τobs) of 714 μs. Systematic analysis of the structure-photophysical properties relationship suggested that porphyrinates are effective antenna ligands with a sensitization efficiency up to ca. 100% and that replacement of the high-energy C-H oscillators in porphyrinate and Kläui ligands significantly improves the intrinsic quantum yield up to 75% (τobs/τrad), both of which contribute to enhancing the NIR emission intensity of Yb(iii) up to 25-fold. Besides the high luminescence efficiency, these Yb complexes have other attractive features such as excitation in the visible range and large extinction coefficients which make these Yb(iii) complexes outstanding optical materials in the NIR region.
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Affiliation(s)
- Ji-Yun Hu
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , P. R. China . ;
| | - Yingying Ning
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , P. R. China . ;
| | - Yin-Shan Meng
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , P. R. China . ;
| | - Jing Zhang
- College of Materials Science and Opto-Electronic Technology , University of Chinese Academy of Sciences , Beijing , 100049 , P. R. China
| | - Zhuo-Yan Wu
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , P. R. China . ;
| | - Song Gao
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , P. R. China . ;
| | - Jun-Long Zhang
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , College of Chemistry and Molecular Engineering , Peking University , Beijing , 100871 , P. R. China . ;
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39
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Wu J, Xing Y, Wang H, Liu H, Yang M, Yuan J. Design of a β-diketonate–Eu3+ complex-based time-gated luminescence probe for visualizing mitochondrial singlet oxygen. NEW J CHEM 2017. [DOI: 10.1039/c7nj03696e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A β-diketonate–Eu3+ complex-based time-gated luminescence probe was developed for highly sensitive monitoring of mitochondrial singlet oxygen during the photodynamic therapy process.
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Affiliation(s)
- Jing Wu
- School of Chemistry and Chemical Engineering
- Liaoning Normal University
- Dalian 116029
- China
| | - Yue Xing
- School of Chemistry and Chemical Engineering
- Liaoning Normal University
- Dalian 116029
- China
| | - Huan Wang
- School of Chemistry and Chemical Engineering
- Liaoning Normal University
- Dalian 116029
- China
| | - Hongjing Liu
- School of Chemistry and Chemical Engineering
- Liaoning Normal University
- Dalian 116029
- China
| | - Mei Yang
- School of Chemistry and Chemical Engineering
- Liaoning Normal University
- Dalian 116029
- China
| | - Jingli Yuan
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
- China
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40
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Ahmed Z, Aderne RE, Kai J, Resende JALC, Padilla-Chavarría HI, Cremona M. Near infrared organic light emitting devices based on a new erbium(iii) β-diketonate complex: synthesis and optoelectronic investigations. RSC Adv 2017. [DOI: 10.1039/c6ra27473k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This paper deals with the synthesis of a new near infra-red emitting Er(iii) β-diketonate complex of low coordinate structure, its characterisation and fabrication of organic light emitting diode using the complex as emitting layer.
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Affiliation(s)
- Zubair Ahmed
- Department of Physics
- Pontifícia Universidade Católica do Rio de Janeiro
- PUC-Rio
- Rio de Janeiro
- Brazil
| | - Rian E. Aderne
- Department of Physics
- Pontifícia Universidade Católica do Rio de Janeiro
- PUC-Rio
- Rio de Janeiro
- Brazil
| | - Jiang Kai
- Department of Chemistry
- Pontifícia Universidade Católica do Rio de Janeiro
- PUC-Rio
- Rio de Janeiro
- Brazil
| | - Jackson A. L. C. Resende
- Instituto de Ciências Extas e da Terra
- Centro Universitário do Araguaia
- Universidade Federal do Mato Grosso
- Barra do Garças
- Brazil
| | | | - Marco Cremona
- Department of Physics
- Pontifícia Universidade Católica do Rio de Janeiro
- PUC-Rio
- Rio de Janeiro
- Brazil
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41
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Ahmed Z, Aderne RE, Kai J, Resende JA, Cremona M. Synthesis of a low-coordinate erbium (III) β-diketonate complex assembled by opto-electronically active 1,3-diphenyl-1,3-propanedione and triphenylphosphine oxide ligands. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.08.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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42
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Synthesis and NIR-optoelectronic properties of a seven-coordinate ytterbium tris β-diketonate complex with C3 geometrical structure. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.06.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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43
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Gangan TU, Sreenadh S, Reddy M. Visible-light excitable highly luminescent molecular plastic materials derived from Eu3+-biphenyl based β-diketonate ternary complex and poly(methylmethacrylate). J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.06.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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44
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Structure elucidation by sparkle/RM1, effect of lanthanide contraction and photophysical properties of lanthanide(III) trifluoroacetylacetonate complexes with 1,10-phenanthroline. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.03.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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45
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Homochiral mono- and dinuclear SmIII complexes showing the effect of nuclearity on their photophysical properties. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.03.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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46
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Gomez GE, Kaczmarek AM, Van Deun R, Brusau EV, Narda GE, Vega D, Iglesias M, Gutierrez-Puebla E, Monge MÁ. Photoluminescence, Unconventional-Range Temperature Sensing, and Efficient Catalytic Activities of Lanthanide Metal-Organic Frameworks. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501402] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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47
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Li R, Qu XL, Zhang YH, Han HL, Li X. Lanthanide–organic frameworks constructed from naphthalenedisulfonates: structure, luminescence and luminescence sensing properties. CrystEngComm 2016. [DOI: 10.1039/c6ce01028h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Antal P, Drahoš B, Herchel R, Trávníček Z. Muffin-like lanthanide complexes with an N5O2-donor macrocyclic ligand showing field-induced single-molecule magnet behaviour. Dalton Trans 2016; 45:15114-15121. [DOI: 10.1039/c6dt02537d] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Three mononuclear lanthanide complexes of a 2-pyridylmethyl pendant-armed 15-membered ligand {L} with general formula [Ln(L)(H2O)(NO3)](NO3)2 (Ln = Tb (1), Dy (2), and Er (3)) are reported.
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Affiliation(s)
- Peter Antal
- Department of Inorganic Chemistry
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-771 46 Olomouc
| | - Bohuslav Drahoš
- Department of Inorganic Chemistry
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-771 46 Olomouc
| | - Radovan Herchel
- Department of Inorganic Chemistry
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-771 46 Olomouc
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-771 46 Olomouc
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49
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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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50
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Zhuravlev K, Kudryashova V, Tsaryuk V. Luminescence and energy transfer processes in europium and terbium complexes with 2-substituted cycloalkanones and 1,10-phenanthroline derivatives. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2015.08.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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