Eu3+complex as an Efficient Luminescent Sensitizer for NIR-Emitting Core–Shell ZnxMgySnO4:Cr3+Persistent Luminescence Materials Leonardo H. C. Francisco, Renan P. Moreira, Francine F. S. Salvador, Maria C. F. C. Felinto, Veronica C. Teixeira, Oscar M. L. Malta, Lucas C. V. Rodrigues, Hermi F. Brito ACS Applied Optical Materials, 2026 This work presents the development of core–shell ZnxMgySnO4:Cr3+ (40 and 80% Mg) persistent luminescent (PersL) materials prepared by the ceramic method and decorated with the [Eu(tta)3(H2O)2] complex via microwave-assisted silanization, with promising optical properties in the near-infrared (NIR) range. The crystal structure of the prepared materials showed overlapping Mg2SnO4 and Zn2SnO4 patterns, along with SnO2, with increasing Mg content. FESEM and TEM microscopy revealed polycrystalline particles with well-defined surfaces and a silica shell in the 5–10 nm range. The optical properties were investigated by UV–vis and synchrotron spectroscopies (VUV, XANES-XEOL, and XRF). The persistent luminescent materials exhibit a noticeable increase in band gap energy with higher Mg content, intense, broadband NIR emission centered at 780 nm from the Cr3+ ion in a weak crystal-field environment, as well as longer PersL decay time with a higher Mg/Zn ratio. Core–shell materials decorated with the Eu3+-complex indicate energy transfer to the Cr3+ ion, resulting in NIR luminescence sensitization by UV and X-ray excitation. Therefore, we demonstrate an effective strategy to sensitize NIR emission by utilizing a highly efficient Eu3+ complex in core–shell persistent luminescent materials, which exhibit notable structural and optical properties and hold promise for optical imaging and photonic applications.
The role of an LMCT state on luminescence quenching in dimeric lanthanide dipivaloylmethanate compounds Paulo R. S. Santos, Ashely A. S. S. Jesus, William B. Lima, Iran F. Silva, Joaldo G. Arruda, Wagner M. Faustino, Maria Claudia F. C. Felinto, Hermi F. Brito, Israel F. Costa, Renata Diniz, Ercules E. S. Teotonio Dalton Transactions, 2025 Illustrative representation of the energy transfer process and luminescence quenching via a ligand-to-metal charge transfer (LMCT) state in the Eu3+compounds with 1,2-bis(diphenylphosphino)ethene oxide acting as bridging ligand.
Luminescence properties of lanthanide tetrakis complexes as molecular light emitters Israel F. Costa, Lucca Blois, Tiago B. Paolini, Israel P. Assunção, Ercules E.S. Teotonio, Maria Claudia F.C. Felinto, Renaldo T. Moura Jr., Ricardo L. Longo, Wagner M. Faustino, Luís D. Carlos, Oscar L. Malta, Albano N. Carneiro Neto, Hermi F. Brito Coordination Chemistry Reviews, 2024
Shedding Light on Eu(III) β-Diketonate Compounds with 1,2-Bis(diphenylphosphino)ethane Oxide Ligand: an Optical Study Paulo R. S. Santos, Ashley A. S. S. Jesus, William B. Lima, Joaldo G. Arruda, Wagner M. Faustino, Maria C. F. C. Felinto, José R. Sabino, Hermi F. Brito, Israel F. Costa, Renaldo T. Moura, Albano N. Carneiro Neto, Oscar L. Malta, Huayna Terraschke, Ercules E. S. Teotonio European Journal of Inorganic Chemistry, 2024 A series of novel lanthanide β‐diketonate coordination compounds containing the ancillary ligand bis(diphenylphosphino) oxide (dppeO2) have been synthesized, characterized, and studied spectroscopically. The compounds of formulas Ln(β‐dik)3(dppeO2), where Ln: Eu and Gd and β‐dik ligands as tta (Ln‐1), btf (Ln‐2), bzac (Ln‐5) and tfac (Ln‐4), and Ln2(β‐dik)6(dppeO2) with ligand dbm (Ln‐3) and fod (Ln‐6). Their photophysical properties were investigated from the Judd‐Ofelt intensity parameters ( ), radiative ( ) and non‐radiative ( ) rates, intrinsic ( ) and overall ( ) quantum yields, and CIE (x,y) color coordinates. The Eu‐5 and Eu‐6 compounds have the first excited triplet states T1 (around 18802 and 18976 cm−1, respectively) almost resonant with the Eu3+ 5D0 emission level, whereas the complexes Eu‐1, Eu‐2, Eu‐3, and Eu‐4 exhibited higher T1 energies. The values were predominantly driven by the intensity parameter , suggesting more pronounced angular changes in the first coordination sphere of the Eu3+ ion. The values also exhibited significant changes with the β‐diketonate ligands. Eu‐1 showed the highest value of (60 %), indicating a more efficient intramolecular energy transfer process. On the other hand, Eu‐5 and Eu‐6 compounds showed values equal to 18.7 % and 16.5 %, respectively, which indicates the presence of luminescence quencher channels.
JOYSpectra: A web platform for luminescence of lanthanides Renaldo T. Moura Jr., Albano N. Carneiro Neto, Eduardo C. Aguiar, Carlos V. Santos-Jr., Ewerton M. de Lima, Wagner M. Faustino, Ercules E.S. Teotonio, Hermi F. Brito, Maria C.F.C. Felinto, Rute A.S. Ferreira, Luís D. Carlos, Ricardo L. Longo, Oscar L. Malta Optical Materials X, 2021
Mechanoluminescence of coordination compounds Ercules Epaminondas Sousa Teotonio, Wagner Mendonça Faustino, Hermi Felinto Brito, Maria Claudia França Cunha Felinto, Jandeilson Lima Moura, Israel Ferreira Costa, Paulo Roberto Silva Santos Triboluminescence Theory Synthesis and Application, 2016
Magnetic polymeric microspheres for protein adsorption M.C.F.C. Felinto, D.F. Parra, A.B. Lugão, M.P. Batista, O.Z. Higa, et al. Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms, 2005
Eu 3 + complex as an Efficient Luminescent Sensitizer for NIR-Emitting Core–Shell Zn x Mg y SnO 4 :Cr 3 + Persistent Luminescence Materials LHC Francisco, RP Moreira, FFS Salvador, MCFC Felinto, VC Teixeira, ... ACS Applied Optical Materials , 2026 2026
A derivation of Judd-Ofelt theory by second quantization of configuration interaction L Blois, RL Longo, ANC Neto, WM Faustino, RT Moura Jr, MCFC Felinto, ... Journal of Luminescence, 121699 , 2025 2025
Luminescence in Ln3+ dipivaloylmethanate complexes: Spectroscopic and theoretical investigation on the energy transfer and LMCT state JG Arruda, IF Silva, WM Faustino, IF Costa, HF Brito, ANC Neto, C Näther, ... Polyhedron 267, 117313 , 2025 2025 Citations: 2
Luminescent lanthanide compounds containing novel bis-(β-diketonate) ligands with potential for biological application PRS Santos, BS Cugnasca, HF Brito, MCFC Felinto, EES Teotonio Proceedings , 2025 2025
Highly luminescent Eu (β-DKT) 3phen complexes in solid and PMMA-doped films for bright red luminescent walls AHDA Cabral, RP Moreira, LHC Francisco, AASS Jesus, PRS Santos, ... Proceedings , 2025 2025
Synthesis of lanthanide phosphates (Eu3+, Tb3+, Er3+, Yb3+) for applications in agriculture R Maziviero, IP Assunção, HF Brito, MCFC Felinto, MJB Garcia, ... Proceedings , 2025 2025
Luminescent properties of europium-EDTA complexes with 2-acyl-1, 3-indandionate ligands EES Teotonio, PRS Santos, AASS Jesus, IF Silva, WM Faustino, HF Brito, ... Proceedings , 2025 2025
Novel core-shell persistent phosphor thin films for optical energy conversion and storage LHC Francisco, RP Moreira, E Bonturim, OL Malta, HF Brito, ... Proceedings , 2025 2025
Hydrothermal synthesis and spectroscopic study of aquo Ln3+ tris complexes with the nalidixate ligand V Waldes, P Miranda Junior, IP Assunção, HF Brito, MCFC Felinto Proceedings , 2025 2025
Structural and optical Properties of Nd³⁺-doped BaMO4 (M: W, Mo) phosphors synthed by coprecipitation method RP Moreira, LHC Francisco, EES Teotonio, HF Brito, OL Malta, ... Proceedings , 2025 2025
PVP films doped with silver nanoparticles and Eu3+ complexes for use as optical markers AASS Jesus, LA Souza, LKO Nakamura, PRS Santos, EES Teotonio, ... Proceedings , 2025 2025
New β-diketonate lanthanide complexes: synthesis and intramolecular energy transfer AL Gouveia, JG Arruda, IF Silva, AN Carneiro Neto, WM Faustino, ... Proceedings , 2025 2025
Synthesis, characterization and photoluminescent properties of mono-, bisand tris-dicetonate lanthanide complexes AASS Jesus, AL Gouveia, PRS dos Santos, JG Arruda, IF Costa, ... Anais , 2025 2025
Lanthanide isothiocyanate complexes: Structures and the role of the LMCT state in intramolecular energy transfer PRS dos Santos, IF Silva, IF Costa, RHM Galdino, JG Arruda, HF Brito, ... Anais , 2025 2025
The role of an LMCT state on luminescence quenching in dimeric lanthanide dipivaloylmethanate compounds PRS Santos, AASS Jesus, WB Lima, IF Silva, JG Arruda, WM Faustino, ... Dalton Transactions 54 (24), 9517-9529 , 2025 2025 Citations: 1
High red luminescence intensity under sunlight exposure of a PMMA polymer doped with a tetrakis Eu 3+ β-diketonate complex containing a benzimidazolium counterion IP Assunção, IF Costa, L Blois, MCFC Felinto, VM Deflon, RA Ando, ... RSC advances 15 (1), 435-445 , 2025 2025 Citations: 8
Luminescence under UV (A, B and C) and sunlight exposure of tetrakis Tb3+ carboxylate complexes doped in different polymers IP Assuncao, L Blois, FP Cauli, MCFC Felinto, OL Malta, HF Brito Journal of Alloys and Compounds 1002, 175319 , 2024 2024 Citations: 4
A new strategy to prepare high luminescent films containing polypropylene and polyamide doped with Eu3+ β-diketonate complex DF Parra, LG Marchini, MCFC Felinto, HF Brito Optical Materials 152, 115396 , 2024 2024 Citations: 2
Luminescence properties of lanthanide tetrakis complexes as molecular light emitters IF Costa, L Blois, TB Paolini, IP Assunção, EES Teotonio, MCFC Felinto, ... Coordination Chemistry Reviews 502, 215590 , 2024 2024 Citations: 68
Shedding Light on Eu (III) β‐Diketonate Compounds with 1, 2‐Bis (diphenylphosphino) ethane Oxide Ligand: an Optical Study PRS Santos, AASS Jesus, WB Lima, JG Arruda, WM Faustino, ... European Journal of Inorganic Chemistry 27 (4), e202300660 , 2024 2024 Citations: 9
MOST CITED SCHOLAR PUBLICATIONS
Luminescence investigation of Eu3+ ion in the RE2 (WO4) 3 matrix (RE= La and Gd) produced using the Pechini method CA Kodaira, HF Brito, MCFC Felinto Journal of Solid State Chemistry 171 (1-2), 401-407 , 2003 2003 Citations: 296
Intermolecular energy transfer and photostability of luminescence-tuneable multicolour PMMA films doped with lanthanide–β-diketonate complexes J Kai, MCFC Felinto, LAO Nunes, OL Malta, HF Brito Journal of Materials Chemistry 21 (11), 3796-3802 , 2011 2011 Citations: 240
Highly-sensitive Eu 3+ ratiometric thermometers based on excited state absorption with predictable calibration AS Souza, LAO Nunes, IGN Silva, FAM Oliveira, LL da Luz, HF Brito, ... Nanoscale 8 (9), 5327-5333 , 2016 2016 Citations: 192
A lead-selective extraction chromatographic resin and its application to the isolation of lead from geological samples EP Horwitz, ML Dietz, S Rhoads, C Felinto, NH Gale, J Houghton Analytica Chimica Acta 292 (3), 263-273 , 1994 1994 Citations: 187
Discovery of the Persistent Luminescence Mechanism of CdSiO 3 :Tb 3+ LCV Rodrigues, HF Brito, J Holsa, R Stefani, MCFC Felinto, M Lastusaari, ... The Journal of Physical Chemistry C 116 (20), 11232-11240 , 2012 2012 Citations: 173
Luminescence investigation of the Sm (III)-β-diketonates with sulfoxides, phosphine oxides and amides ligands HF Brito, OL Malta, MCFC Felinto, EES Teotonio, JFS Menezes, ... Journal of alloys and compounds 344 (1-2), 293-297 , 2002 2002 Citations: 143
Modeling intramolecular energy transfer in lanthanide chelates: A critical review and recent advances ANC Neto, EES Teotonio, GF de Sá, HF Brito, J Legendziewicz, ... Handbook on the physics and chemistry of rare earths 56, 55-162 , 2019 2019 Citations: 141
Evaluation of intramolecular energy transfer process in the lanthanide (III) bis-and tris-(TTA) complexes: Photoluminescent and triboluminescent behavior EES Teotonio, GM Fett, HF Brito, WM Faustino, GF de Sá, MCFC Felinto, ... Journal of Luminescence 128 (2), 190-198 , 2008 2008 Citations: 131
Synthesis and spectroscopic behavior of highly luminescent Eu3+–dibenzoylmethanate (DBM) complexes with sulfoxide ligands E Niyama, HF Brito, M Cremona, EES Teotonio, R Reyes, GES Brito, ... Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 61 (11 … , 2005 2005 Citations: 128
Luminescence phenomena involving metal enolates H Felinto Brito, O Manoel Loureiro Malta, ... PATAI'S chemistry of functional groups , 2009 2009 Citations: 112
Optical investigation of Y2O3: Sm3+ nanophosphor prepared by combustion and Pechini methods CA Kodaira, R Stefani, AS Maia, MCFC Felinto, HF Brito Journal of Luminescence 127 (2), 616-622 , 2007 2007 Citations: 105
Optical properties of red, green and blue emitting rare earth benzenetricarboxylate compounds ER Souza, IGN Silva, EES Teotonio, MCFC Felinto, HF Brito Journal of luminescence 130 (2), 283-291 , 2010 2010 Citations: 104
Photoluminescent behavior of SrB4O7: RE2+ (RE= Sm and Eu) prepared by Pechini, combustion and ceramic methods R Stefani, AD Maia, EES Teotonio, MAF Monteiro, MCFC Felinto, HF Brito Journal of Solid State Chemistry 179 (4), 1086-1092 , 2006 2006 Citations: 103
Synthesis, crystalline structure and photoluminescence investigations of the new trivalent rare earth complexes (Sm3+, Eu3+ and Tb3+) containing 2-thiophenecarboxylate as … EES Teotonio, MCFC Felinto, HF Brito, OL Malta, AC Trindade, R Najjar, ... Inorganica Chimica Acta 357 (2), 451-460 , 2004 2004 Citations: 103
Luminescent nanoparticles of MgAl2O4: Eu, Dy prepared by citrate sol–gel method AS Maia, R Stefani, CA Kodaira, MCFC Felinto, EES Teotonio, HF Brito Optical Materials 31 (2), 440-444 , 2008 2008 Citations: 97
Defect to R 3+ energy transfer: colour tuning of persistent luminescence in CdSiO 3 LCV Rodrigues, J Hölsä, M Lastusaari, MCFC Felinto, HF Brito Journal of Materials Chemistry C 2 (9), 1612-1618 , 2014 2014 Citations: 92
The Role of the Ligand‐to‐Metal Charge‐Transfer State in the Dipivaloylmethanate‐Lanthanide Intramolecular Energy Transfer Process YC Miranda, LLAL Pereira, JHP Barbosa, HF Brito, MCFC Felinto, ... European Journal of Inorganic Chemistry 2015 (18), 3019-3027 , 2015 2015 Citations: 85
Triboluminescence DO Olawale, JM Uddin, J Yan, TJ Dickens, OOI Okoli Triboluminescence , 2016 2016 Citations: 79
JOYSpectra: A web platform for luminescence of lanthanides RT Moura Jr, ANC Neto, EC Aguiar, CV Santos-Jr, EM de Lima, ... Optical Materials: X 11, 100080 , 2021 2021 Citations: 78