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Carneiro Neto AN, Nasalska J, Gawryszewska P, Trush VA, Sokolnicki J, Malta OL, Legendziewicz J. Intramolecular energy transfer and its influence on the overall quantum yields of Eu 3+ and Tb 3+ chelates with dimethyl(phenylsulfonyl)amidophosphate ligands. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 324:124875. [PMID: 39137707 DOI: 10.1016/j.saa.2024.124875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 07/06/2024] [Accepted: 07/22/2024] [Indexed: 08/15/2024]
Abstract
Lanthanide chelates with dimethyl(phenylsulfonyl)amidophosphate (labeled as HSP) and Lewis base ligands (bpy = 2,2;-bipyridine and phen = 1,10-phenanthroline) of formula Na[Ln(SP)4] (1Ln), [Ln(SP)3bpy] (2Ln); [Ln(SP)3phen] (3Ln) (Ln = Eu3+, Gd3+, Tb3+ and Lu3+) were obtained and characterized by the X-ray, photoluminescence spectroscopy at 293 and 77 K as well as by intrinsic (QLnLn) and overall (QLnL) luminescence quantum yields. These phosphors manifest a very strong emission after excitation in the UV range of the molecular singlet states (S1) and two of them have very high QLnL values (Eu3+ and Tb3+ chelates of the type 2Ln and 3Ln). The dynamics of the excited states are discussed based on the intramolecular energy transfer theory, considering the dipole-dipole, the dipole-multipole and the exchange mechanisms. From the calculated energy transfer rates, a rate equation model was constructed and, thus, the theoretical QLnL can be obtained. A good correlation between the experimentally determined and theoretically calculated QLnL values was achieved, with the triplet state (T1) playing a predominant role in the energy transfer process for Eu3+ compounds, while the sensitization for Tb3+ compounds is dominated by the energy transfer rates from the singlet state (S1).
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Affiliation(s)
- Albano N Carneiro Neto
- Phantom-g, CICECO-Aveiro Institute of Materials, Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Justyna Nasalska
- Faculty of Chemistry, University of Wroclaw, 14 F. Joliot-Curie Str., 50-383 Wroclaw, Poland
| | - Paula Gawryszewska
- Faculty of Chemistry, University of Wroclaw, 14 F. Joliot-Curie Str., 50-383 Wroclaw, Poland
| | - Viktor A Trush
- Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska str. 64, Kyiv 01601, Ukraine
| | - Jerzy Sokolnicki
- Faculty of Chemistry, University of Wroclaw, 14 F. Joliot-Curie Str., 50-383 Wroclaw, Poland
| | - Oscar L Malta
- Department of Fundamental Chemistry, Federal University of Pernambuco, Recife, Pernambuco, Brazil.
| | - Janina Legendziewicz
- Faculty of Chemistry, University of Wroclaw, 14 F. Joliot-Curie Str., 50-383 Wroclaw, Poland.
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Félix G, Kulakova AN, Sene S, Khrustalev VN, Hernández-Rodríguez MA, Shubina ES, Pelluau T, Carlos LD, Guari Y, Carneiro Neto AN, Bilyachenko AN, Larionova J. Luminescent Ln 3+-based silsesquioxanes with a β-diketonate antenna ligand: toward the design of efficient temperature sensors. Front Chem 2024; 12:1379587. [PMID: 38633984 PMCID: PMC11022212 DOI: 10.3389/fchem.2024.1379587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 03/07/2024] [Indexed: 04/19/2024] Open
Abstract
We report the synthesis and single-crystal X-ray diffraction, magnetic, and luminescence measurements of a novel family of luminescent cage-like tetranuclear silsesquioxanes (PhSiO1.5)8(LnO1.5)4(O)(C5H8O2)6(EtOH)2(CH3CN)2⋅2CH3CN (where Ln = Tb, 1; Tb/Eu, 2; and Gd, 3), featuring seven-coordinated lanthanide ions arranged in a one-capped trigonal prism geometry. Compounds 1 and 2 exhibit characteristic Tb3+ and Tb3+/Eu3+-related emissions, respectively, sensitized by the chelating antenna acetylacetonate (acac) ligands upon excitation in the UV and visible spectral regions. Compound 3 is used to assess the energies of the triplet states of the acac ligand. For compound 1, theoretical calculations on the intramolecular energy transfer and multiphonon rates indicate a thermal balance between the 5D4 Stark components, while the mixed Tb3+/Eu3+ analog 2, with a Tb:Eu ratio of 3:1, showcases intra-cluster Tb3+-to-Eu3+ energy transfer, calculated theoretically as a function of temperature. By utilizing the intensity ratio between the 5D4→7F5 (Tb3+) and 5D0→7F2 (Eu3+) transitions in the range 11-373 K, we demonstrate the realization of a ratiometric luminescent thermometer with compound 2, operating in the range 11-373 K with a maximum relative sensitivity of 2.0% K-1 at 373 K. These findings highlight the potential of cage-like silsesquioxanes as versatile materials for optical sensing-enabled applications.
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Affiliation(s)
- Gautier Félix
- CNRS, ENSCM, University Montpellier, Montpellier, France
| | - Alena N Kulakova
- CNRS, ENSCM, University Montpellier, Montpellier, France
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia
| | - Saad Sene
- CNRS, ENSCM, University Montpellier, Montpellier, France
| | - Victor N Khrustalev
- Peoples' Friendship University of Russia (RUDN University), Moscow, Russia
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Miguel A Hernández-Rodríguez
- Phantom-g, Physics Department and CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
- Departamento de Física, Universidad de La Laguna San Cristóbal de La Laguna, Santa Cruz de Tenerife, Spain
| | - Elena S Shubina
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia
| | | | - Luís D Carlos
- Phantom-g, Physics Department and CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Yannick Guari
- CNRS, ENSCM, University Montpellier, Montpellier, France
| | - Albano N Carneiro Neto
- Phantom-g, Physics Department and CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Alexey N Bilyachenko
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia
- Peoples' Friendship University of Russia (RUDN University), Moscow, Russia
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Manzur J, Fuentealba P, Gil Y, Pérez-Obando J, Morales Alfaro J, Vega Carvallo AI, Aravena D, Santana RCD, Carneiro Neto AN, Spodine E. Tuning the Emission of Homometallic Dy III, Tb III, and Eu III 1-D Coordination Polymers with 2,6-Di(1 H-1,2,4-triazole-1-yl-methyl)-4-R-phenoxo Ligands: Sensitization through the Singlet State. Inorg Chem 2023; 62:19195-19207. [PMID: 37956256 DOI: 10.1021/acs.inorgchem.3c02201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
This work reports the structural characterization and photophysical properties of DyIII, TbIII, and EuIII coordination polymers with two phenoxo-triazole-based ligands [2,6-di(1H-1,2,4-triazole-1-yl-methyl)-4-R-phenoxo, LRTr (R = CH3; Cl)]. These ligands permitted us to obtain isostructural polymers, described as a 1D double chain, with LnIII being nona-coordinated. The energies of the ligand triplet (T1) states were estimated using low-temperature time-resolved emission spectra of YIII analogues. Compounds with LClTr present higher emission intensity than those with LMeTr. The emission of TbIII compounds was not affected by the different excitation wavelengths used and was emitted in the pure green region. In contrast, DyLMeTr emits in the blue-to-white region, while the luminescence of DyLClTr remains in the white region for all excitation wavelengths. On the other hand, EuIII compounds emit in the blue (ligand) or red region (EuIII) depending on the substituent of the phenoxo moiety and excitation wavelength. Theoretical calculations were employed to determine the excited states of the ligands by using time-dependent density functional theory. These calculations aided in modeling the intramolecular energy transfer and rationalizing the optical properties and demonstrated that the sensitization of the LnIII ions is driven via S1 → LnIII, a process that is less common as compared to T1 → LnIII.
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Affiliation(s)
- Jorge Manzur
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos 1007, Santiago 8380544, Chile
| | - Pablo Fuentealba
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos 1007, Santiago 8380544, Chile
| | - Yolimar Gil
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos 1007, Santiago 8380544, Chile
| | - Juliana Pérez-Obando
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos 1007, Santiago 8380544, Chile
| | - Jeannette Morales Alfaro
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos 1007, Santiago 8380544, Chile
| | | | - Daniel Aravena
- Departamento de Materiales, Facultad de Química y Biología, Universidad de Santiago, Av. Libertador Bernardo O'Higgins 3363, Santiago 9160000, Chile
| | - Ricardo Costa de Santana
- Instituto de Física, Universidade Federal de Goiás, Campus Samambaia, Goiânia 74690-900, GO,Brazil
| | - Albano N Carneiro Neto
- Physics Department and CICECO─Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-193, Portugal
| | - Evgenia Spodine
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos 1007, Santiago 8380544, Chile
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Santos CV, Monteiro SA, Soares ASC, Souto ICA, Moura RT. Decoding Chemical Bonds: Assessment of the Basis Set Effect on Overlap Electron Density Descriptors and Topological Properties in Comparison to QTAIM. J Phys Chem A 2023; 127:7997-8014. [PMID: 37703453 DOI: 10.1021/acs.jpca.3c04504] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
Quantum chemical bonding descriptors based on the total and overlap density can provide valuable information about chemical interactions in different systems. However, these descriptors can be sensitive to the basis set used. To address this, different numerical treatments of electron density have been proposed to reduce the basis set dependency. In this work, we introduce overlap properties (OPs) obtained through numerical treatment of the electron density and present the topology of overlap density (TOP) for the first time. We compare the basis set dependency of numerical OP and TOP descriptors with their quantum theory of atoms in molecules (QTAIM) counterparts, considering the total electron density. Three single (C-C, C-O, and C-F) bonds in ethane, methanol, and fluoromethane and two double (C═C and C═O) bonds in ethene and formaldehyde were analyzed. Diatomic molecules Li-X with X = F, Cl, and Br were also analyzed. Eight parameters, including QTAIM descriptors and OP/TOP descriptors, are used to assess the basis dependency at the ωB97X-D level of theory using 28 basis sets from three classes: Pople, Ahlrichs, and Dunning. The study revealed that the topological overlap electron density properties exhibit comparatively lesser dependence on the basis set compared to their total electron density counterparts. Remarkably, these properties retain their chemical significance even with reduced basis set dependency. Similarly, numerical OP descriptors show less basis set dependency than their QTAIM counterparts. The excess of polarization functions increases charge concentration in the interatomic region and influences both QTAIM and OP descriptors. The basis sets Def2TZVP, 6-31++G(d,p), 6-311++G(d,p), cc-pVDZ, cc-pVTZ, and cc-pVQZ demonstrate reduced variability for the tested bond classes in this study, with particular emphasis on the triple-ζ quality Ahlrichs' basis set. We recommend against using basis sets with numerous polarization functions, such as augmented Dunning's and Ahlrichs' quadruple-ζ.
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Affiliation(s)
- Carlos V Santos
- Department of Chemistry, Federal University of Paraiba, Joao Pessoa, Paraiba 58051-970, Brazil
| | - Shirlene A Monteiro
- Department of Chemistry, State University of Paraiba, Campina Grande, Paraiba 58051-970, Brazil
| | - Amanda S C Soares
- Department of Chemistry and Physics, Center of Agrarian Sciences, Federal University of Paraiba, Areia, Paraiba 58397-000, Brazil
| | - Isabeli C A Souto
- Department of Chemistry and Physics, Center of Agrarian Sciences, Federal University of Paraiba, Areia, Paraiba 58397-000, Brazil
| | - Renaldo T Moura
- Department of Chemistry and Physics, Center of Agrarian Sciences, Federal University of Paraiba, Areia, Paraiba 58397-000, Brazil
- Computational and Theoretical Chemistry Group (CATCO), Department of Chemistry, Southern Methodist University, Dallas, Texas 75275, United States
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Kitagawa Y, Shima K, Nakai T, Kumagai M, Omagari S, Ferreira da Rosa PP, Shoji S, Fushimi K, Hasegawa Y. Thermally-assisted photosensitized emission in a trivalent terbium complex. Commun Chem 2023; 6:122. [PMID: 37349551 DOI: 10.1038/s42004-023-00922-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 06/05/2023] [Indexed: 06/24/2023] Open
Abstract
Luminescent lanthanide complexes containing effective photosensitizers are promising materials for use in displays and sensors. The photosensitizer design strategy has been studied for developing the lanthanide-based luminophores. Herein, we demonstrate a photosensitizer design using dinuclear luminescent lanthanide complex, which exhibits thermally-assisted photosensitized emission. The lanthanide complex comprised Tb(III) ions, six tetramethylheptanedionates, and phosphine oxide bridge containing a phenanthrene frameworks. The phenanthrene ligand and Tb(III) ions are the energy donor (photosensitizer) and acceptor (emission center) parts, respectively. The energy-donating level of the ligand (lowest excited triplet (T1) level = 19,850 cm-1) is lower than the emitting level of the Tb(III) ion (5D4 level = 20,500 cm-1). The long-lived T1 state of the energy-donating ligands promoted an efficient thermally-assisted photosensitized emission of the Tb(III) acceptor (5D4 level), resulting in a pure-green colored emission with a high photosensitized emission quantum yield (73%).
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Affiliation(s)
- Yuichi Kitagawa
- Faculty of Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, N21W10, Sapporo, Hokkaido, 001-0021, Japan.
| | - Kaori Shima
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, N13W8, Sapporo, Hokkaido, 060-8628, Japan
| | - Takuma Nakai
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, N13W8, Sapporo, Hokkaido, 060-8628, Japan
| | - Marina Kumagai
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, N13W8, Sapporo, Hokkaido, 060-8628, Japan
| | - Shun Omagari
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-S8-44, Meguro-ku, Tokyo, 152-8552, Japan
| | - Pedro Paulo Ferreira da Rosa
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, N13W8, Sapporo, Hokkaido, 060-8628, Japan
| | - Sunao Shoji
- Faculty of Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, N21W10, Sapporo, Hokkaido, 001-0021, Japan
- Department of Engineering, Nara Women's University, Kitauoya Nishimachi, Nara, 630-8506, Japan
| | - Koji Fushimi
- Faculty of Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, N21W10, Sapporo, Hokkaido, 001-0021, Japan
| | - Yasuchika Hasegawa
- Faculty of Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, N21W10, Sapporo, Hokkaido, 001-0021, Japan.
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Kariaka NS, Lipa A, Carneiro Neto AN, Malta OL, Gawryszewska P, Amirkhanov VM. Eu 3+ and Tb 3+ coordination compounds with phenyl-containing carbacylamidophosphates: comparison with selected Ln 3+ β-diketonates. Front Chem 2023; 11:1188314. [PMID: 37255543 PMCID: PMC10225609 DOI: 10.3389/fchem.2023.1188314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 05/03/2023] [Indexed: 06/01/2023] Open
Abstract
Materials based on Eu3+ and Tb3+ coordination compounds are of great interest due to their strong red and green luminescence. Appropriate selection of ligands plays a huge role in optimizing their photophysical properties. Another very helpful instrument for such optimization is theoretical modelling, which permits the prediction of the emissive properties of materials through intramolecular energy transfer analysis. The ligands that allow for achieving high efficiency of Eu3+ and Tb3+ emissions include carbacylamidophosphates (CAPh, HL). In this brief review, we summarize recent research for lanthanides CAPh-based coordination compounds of general formulas Cat[LnL]4, [LnL3Q] and [Ln(HL)3(NO3)3], where Cat+ = Cs+, NEt4+, PPh4 + and Q = 1,10-phenanthroline, 2,2-bipyridine or triphenylphosphine oxide, involving the use of thermal gravimetric analysis, X-ray analysis, and absorption and luminescence spectroscopy. We carried out a comparison with selected Ln3+ β-diketonates. Possibilities and developments of theoretical calculations on energy transfer rates are also presented.
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Affiliation(s)
- Nataliia S. Kariaka
- Inorganic Chemistry Department, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
| | - Aneta Lipa
- Faculty of Chemistry, University of Wroclaw, Wroclaw, Poland
| | - Albano N. Carneiro Neto
- Physics Department, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Oscar L. Malta
- Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, Brazil
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7
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Nigoghossian K, Bouvet B, Félix G, Sene S, Costa L, Milhet PE, Carneiro Neto AN, Carlos LD, Oliviero E, Guari Y, Larionova J. Magneto-Induced Hyperthermia and Temperature Detection in Single Iron Oxide Core-Silica/Tb 3+/Eu 3+(Acac) Shell Nano-Objects. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12183109. [PMID: 36144897 PMCID: PMC9503042 DOI: 10.3390/nano12183109] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/01/2022] [Accepted: 09/03/2022] [Indexed: 06/02/2023]
Abstract
Multifunctional nano-objects containing a magnetic heater and a temperature emissive sensor in the same nanoparticle have recently emerged as promising tools towards personalized nanomedicine permitting hyperthermia-assisted treatment under local temperature control. However, a fine control of nano-systems' morphology permitting the synthesis of a single magnetic core with controlled position of the sensor presents a main challenge. We report here the design of new iron oxide core-silica shell nano-objects containing luminescent Tb3+/Eu3+-(acetylacetonate) moieties covalently anchored to the silica surface, which act as a promising heater/thermometer system. They present a single magnetic core and a controlled thickness of the silica shell, permitting a uniform spatial distribution of the emissive nanothermometer relative to the heat source. These nanoparticles exhibit the Tb3+ and Eu3+ characteristic emissions and suitable magnetic properties that make them efficient as a nanoheater with a Ln3+-based emissive self-referencing temperature sensor covalently coupled to it. Heating capacity under an alternating current magnetic field was demonstrated by thermal imaging. This system offers a new strategy permitting a rapid heating of a solution under an applied magnetic field and a local self-referencing temperature sensing with excellent thermal sensitivity (1.64%·K-1 (at 40 °C)) in the range 25-70 °C, good photostability, and reproducibility after several heating cycles.
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Affiliation(s)
| | - Basile Bouvet
- ICGM, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France
| | - Gautier Félix
- ICGM, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France
| | - Saad Sene
- ICGM, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France
| | - Luca Costa
- Centre de Biologie Structurale (CBS), University of Montpellier, CNRS, INSERM, 34000 Montpellier, France
| | - Pierre-Emmanuel Milhet
- Centre de Biologie Structurale (CBS), University of Montpellier, CNRS, INSERM, 34000 Montpellier, France
| | - Albano N. Carneiro Neto
- Phantom-G, Physics Department and CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Luis D. Carlos
- Phantom-G, Physics Department and CICECO—Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Erwan Oliviero
- ICGM, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France
| | - Yannick Guari
- ICGM, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France
| | - Joulia Larionova
- ICGM, University of Montpellier, CNRS, ENSCM, 34000 Montpellier, France
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8
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Moura JL, Costa IF, Santos PRS, Silva IF, Moura RT, Carneiro Neto AN, Faustino WM, Brito HF, Sabino JR, Teotonio EES. Enhancing the Luminescence of Eu(III) Complexes with the Ruthenocene Organometallic Unit as Ancillary Ligand. Inorg Chem 2022; 61:13510-13524. [PMID: 35984305 DOI: 10.1021/acs.inorgchem.2c02115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Five novel Eu(III)-β-diketonate complexes containing ruthenocene ancillary ligands (1,1'-bis(diphenylphosphoryl)ruthenocene─RcBPO) were synthesized and characterized. The coordination compounds presented the general formula [Eu(β-dik)3(RcBPO)], where β-dik stands for 2-thenoyltrifluoroacetonate (tta), 3-benzoyl-1,1,1-trifluoroacetone (btf), 2-dibenzoylmethanate (dbm), 2-acetyl-1,3-indandionate (aind), and 2-benzoyl-1,3-indandionate (bind), and RcBPO stands for 1,1'-bis(diphenylphosphoryl)ruthenocene. The [Eu(aind)3(RcBPO)] complex crystallizes in a monoclinic Cc non-centrosymmetric space group with the europium site environment, assuming a bicapped trigonal prism coordination polyhedron with the symmetry point group close to C2v. Photoluminescent properties for the solid-state samples were described in terms of excitation, emission, lifetime decay curves, and intrinsic and overall quantum yields. The replacement of the two coordinated H2O molecules by the RcBPO ancillary ligand leads to great enhancements of the overall quantum yields (QEuL), with the minimum increment by a factor of 5 for the case of [Eu(btf)3(RcBPO)] and the maximum enhancement of 270 times for the case of the [Eu(dbm)3(RcBPO)] complex. In addition, theoretical calculations were carried out to model the spectroscopic properties of the investigated compounds. To obtain theoretical Judd-Ofelt parameters (Ωλ, λ = 2, 4, and 6) and intramolecular energy transfer rates, the JOYSpectra web platform was employed using the structure obtained from density functional theory calculations. Hence, a rate equation model provided theoretical overall quantum yields, which are in great agreement with measured data.
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Affiliation(s)
- Jandeilson L Moura
- Department of Chemistry, Federal University of Paraíba, 58051-970 João Pessoa, Paraiba, Brazil
| | - Israel F Costa
- Department of Chemistry, Federal University of Paraíba, 58051-970 João Pessoa, Paraiba, Brazil.,Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, 05508-000 São Paulo, São Paulo, Brazil
| | - Paulo R S Santos
- Department of Chemistry, Federal University of Paraíba, 58051-970 João Pessoa, Paraiba, Brazil
| | - Iran F Silva
- Department of Chemistry, Federal University of Paraíba, 58051-970 João Pessoa, Paraiba, Brazil
| | - Renaldo T Moura
- Department of Chemistry and Physics, Federal University of Paraíba, 58397-000 Areia, Paraiba, Brazil.,Department of Chemistry, Southern Methodist University, 75275-0314 Dallas, Texas, United States
| | - Albano N Carneiro Neto
- Physics Department and CICECO─Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Wagner M Faustino
- Department of Chemistry, Federal University of Paraíba, 58051-970 João Pessoa, Paraiba, Brazil
| | - Hermi F Brito
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, 05508-000 São Paulo, São Paulo, Brazil
| | - José R Sabino
- Institute of Physics, Federal University of Goiás, 74690-900 Goiânia, Goiás, Brazil
| | - Ercules E S Teotonio
- Department of Chemistry, Federal University of Paraíba, 58051-970 João Pessoa, Paraiba, Brazil.,Institute of Inorganic Chemistry, Christian-Albrechts University of Kiel, 24118 Kiel, Germany
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