1
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Abuter R, Allouche F, Amorim A, Bailet C, Berdeu A, Berger JP, Berio P, Bigioli A, Boebion O, Bolzer ML, Bonnet H, Bourdarot G, Bourget P, Brandner W, Cao Y, Conzelmann R, Comin M, Clénet Y, Courtney-Barrer B, Davies R, Defrère D, Delboulbé A, Delplancke-Ströbele F, Dembet R, Dexter J, de Zeeuw PT, Drescher A, Eckart A, Édouard C, Eisenhauer F, Fabricius M, Feuchtgruber H, Finger G, Förster Schreiber NM, Garcia P, Garcia Lopez R, Gao F, Gendron E, Genzel R, Gil JP, Gillessen S, Gomes T, Gonté F, Gouvret C, Guajardo P, Guieu S, Hackenberg W, Haddad N, Hartl M, Haubois X, Haußmann F, Heißel G, Henning T, Hippler S, Hönig SF, Horrobin M, Hubin N, Jacqmart E, Jocou L, Kaufer A, Kervella P, Kolb J, Korhonen H, Lacour S, Lagarde S, Lai O, Lapeyrère V, Laugier R, Le Bouquin JB, Leftley J, Léna P, Lewis S, Liu D, Lopez B, Lutz D, Magnard Y, Mang F, Marcotto A, Maurel D, Mérand A, Millour F, More N, Netzer H, Nowacki H, Nowak M, Oberti S, Ott T, Pallanca L, Paumard T, Perraut K, Perrin G, Petrov R, Pfuhl O, Pourré N, Rabien S, Rau C, Riquelme M, Robbe-Dubois S, Rochat S, Salman M, Sanchez-Bermudez J, Santos DJD, Scheithauer S, Schöller M, Schubert J, Schuhler N, Shangguan J, Shchekaturov P, Shimizu TT, Sevin A, Soulez F, Spang A, Stadler E, Sternberg A, Straubmeier C, Sturm E, Sykes C, Tacconi LJ, Tristram KRW, Vincent F, von Fellenberg S, Uysal S, Widmann F, Wieprecht E, Wiezorrek E, Woillez J, Zins G. A dynamical measure of the black hole mass in a quasar 11 billion years ago. Nature 2024; 627:281-285. [PMID: 38286342 DOI: 10.1038/s41586-024-07053-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 01/09/2024] [Indexed: 01/31/2024]
Abstract
Tight relationships exist in the local Universe between the central stellar properties of galaxies and the mass of their supermassive black hole (SMBH)1-3. These suggest that galaxies and black holes co-evolve, with the main regulation mechanism being energetic feedback from accretion onto the black hole during its quasar phase4-6. A crucial question is how the relationship between black holes and galaxies evolves with time; a key epoch to examine this relationship is at the peaks of star formation and black hole growth 8-12 billion years ago (redshifts 1-3)7. Here we report a dynamical measurement of the mass of the black hole in a luminous quasar at a redshift of 2, with a look back in time of 11 billion years, by spatially resolving the broad-line region (BLR). We detect a 40-μas (0.31-pc) spatial offset between the red and blue photocentres of the Hα line that traces the velocity gradient of a rotating BLR. The flux and differential phase spectra are well reproduced by a thick, moderately inclined disk of gas clouds within the sphere of influence of a central black hole with a mass of 3.2 × 108 solar masses. Molecular gas data reveal a dynamical mass for the host galaxy of 6 × 1011 solar masses, which indicates an undermassive black hole accreting at a super-Eddington rate. This suggests a host galaxy that grew faster than the SMBH, indicating a delay between galaxy and black hole formation for some systems.
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Affiliation(s)
- R Abuter
- European Southern Observatory, Garching, Germany
| | - F Allouche
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - A Amorim
- Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
- CENTRA - Centro de Astrofísica e Gravitação, Instituto Superior Técnico (IST), Universidade de Lisboa, Lisboa, Portugal
| | - C Bailet
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - A Berdeu
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | - J-P Berger
- Université Grenoble Alpes, CNRS, IPAG, Grenoble, France
| | - P Berio
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - A Bigioli
- Institute of Astronomy, KU Leuven, Leuven, Belgium
| | - O Boebion
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - M-L Bolzer
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
- Department of Physics, Technical University Munich, Garching, Germany
- Univ. Lyon, Univ. Lyon 1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574, Saint-Genis-Laval, France
| | - H Bonnet
- European Southern Observatory, Garching, Germany
| | - G Bourdarot
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - P Bourget
- European Southern Observatory, Santiago, Chile
| | - W Brandner
- Max Planck Institute for Astronomy, Heidelberg, Germany
| | - Y Cao
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - R Conzelmann
- European Southern Observatory, Garching, Germany
| | - M Comin
- European Southern Observatory, Garching, Germany
| | - Y Clénet
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | - B Courtney-Barrer
- European Southern Observatory, Santiago, Chile
- Research School of Astronomy and Astrophysics, College of Science, Australian National University, Canberra, Australian Capital Territory, Australia
| | - R Davies
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - D Defrère
- Institute of Astronomy, KU Leuven, Leuven, Belgium
| | - A Delboulbé
- Université Grenoble Alpes, CNRS, IPAG, Grenoble, France
| | | | - R Dembet
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | - J Dexter
- Department of Astrophysical & Planetary Sciences, JILA, University of Colorado Boulder, Boulder, CO, USA
| | | | - A Drescher
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - A Eckart
- Max Planck Institute for Radio Astronomy, Bonn, Germany
- 1st Institute of Physics, University of Cologne, Cologne, Germany
| | - C Édouard
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | - F Eisenhauer
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - M Fabricius
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - H Feuchtgruber
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - G Finger
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | | | - P Garcia
- CENTRA - Centro de Astrofísica e Gravitação, Instituto Superior Técnico (IST), Universidade de Lisboa, Lisboa, Portugal
- Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
| | - R Garcia Lopez
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
| | - F Gao
- Max Planck Institute for Radio Astronomy, Bonn, Germany
| | - E Gendron
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | - R Genzel
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
- Departments of Physics, University of California, Berkeley, Berkeley, CA, USA
- Department of Astronomy, University of California, Berkeley, Berkeley, CA, USA
| | - J P Gil
- European Southern Observatory, Santiago, Chile
| | - S Gillessen
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - T Gomes
- CENTRA - Centro de Astrofísica e Gravitação, Instituto Superior Técnico (IST), Universidade de Lisboa, Lisboa, Portugal
- Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
| | - F Gonté
- European Southern Observatory, Garching, Germany
| | - C Gouvret
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - P Guajardo
- European Southern Observatory, Santiago, Chile
| | - S Guieu
- Université Grenoble Alpes, CNRS, IPAG, Grenoble, France
| | - W Hackenberg
- European Southern Observatory, Garching, Germany
| | - N Haddad
- European Southern Observatory, Santiago, Chile
| | - M Hartl
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - X Haubois
- European Southern Observatory, Santiago, Chile
| | - F Haußmann
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - G Heißel
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
- Advanced Concepts Team, European Space Agency, TEC-SF, ESTEC, Noordwijk, The Netherlands
| | - Th Henning
- Max Planck Institute for Astronomy, Heidelberg, Germany
| | - S Hippler
- Max Planck Institute for Astronomy, Heidelberg, Germany
| | - S F Hönig
- School of Physics and Astronomy, University of Southampton, Southampton, UK
| | - M Horrobin
- 1st Institute of Physics, University of Cologne, Cologne, Germany
| | - N Hubin
- European Southern Observatory, Garching, Germany
| | - E Jacqmart
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - L Jocou
- Université Grenoble Alpes, CNRS, IPAG, Grenoble, France
| | - A Kaufer
- European Southern Observatory, Santiago, Chile
| | - P Kervella
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | - J Kolb
- European Southern Observatory, Garching, Germany
| | - H Korhonen
- European Southern Observatory, Santiago, Chile
- Max Planck Institute for Astronomy, Heidelberg, Germany
| | - S Lacour
- European Southern Observatory, Garching, Germany
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | - S Lagarde
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - O Lai
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - V Lapeyrère
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | - R Laugier
- Institute of Astronomy, KU Leuven, Leuven, Belgium
| | | | - J Leftley
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - P Léna
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | - S Lewis
- European Southern Observatory, Garching, Germany
| | - D Liu
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - B Lopez
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - D Lutz
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - Y Magnard
- Université Grenoble Alpes, CNRS, IPAG, Grenoble, France
| | - F Mang
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
- Department of Physics, Technical University Munich, Garching, Germany
| | - A Marcotto
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - D Maurel
- Université Grenoble Alpes, CNRS, IPAG, Grenoble, France
| | - A Mérand
- European Southern Observatory, Garching, Germany
| | - F Millour
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - N More
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - H Netzer
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel
| | - H Nowacki
- Université Grenoble Alpes, CNRS, IPAG, Grenoble, France
| | - M Nowak
- Institute of Astronomy, University of Cambridge, Cambridge, UK
| | - S Oberti
- European Southern Observatory, Garching, Germany
| | - T Ott
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - L Pallanca
- European Southern Observatory, Santiago, Chile
| | - T Paumard
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | - K Perraut
- Université Grenoble Alpes, CNRS, IPAG, Grenoble, France
| | - G Perrin
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | - R Petrov
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - O Pfuhl
- European Southern Observatory, Garching, Germany
| | - N Pourré
- Université Grenoble Alpes, CNRS, IPAG, Grenoble, France
| | - S Rabien
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - C Rau
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - M Riquelme
- European Southern Observatory, Garching, Germany
| | - S Robbe-Dubois
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - S Rochat
- Université Grenoble Alpes, CNRS, IPAG, Grenoble, France
| | - M Salman
- Institute of Astronomy, KU Leuven, Leuven, Belgium
| | - J Sanchez-Bermudez
- Max Planck Institute for Astronomy, Heidelberg, Germany
- Instituto de Astronomía, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - D J D Santos
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - S Scheithauer
- Max Planck Institute for Astronomy, Heidelberg, Germany
| | - M Schöller
- European Southern Observatory, Garching, Germany
| | - J Schubert
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - N Schuhler
- European Southern Observatory, Santiago, Chile
| | - J Shangguan
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | | | - T T Shimizu
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany.
| | - A Sevin
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | - F Soulez
- Univ. Lyon, Univ. Lyon 1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574, Saint-Genis-Laval, France
| | - A Spang
- Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France
| | - E Stadler
- Université Grenoble Alpes, CNRS, IPAG, Grenoble, France
| | - A Sternberg
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel
- Center for Computational Astrophysics, Flatiron Institute, New York, NY, USA
| | - C Straubmeier
- 1st Institute of Physics, University of Cologne, Cologne, Germany
| | - E Sturm
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - C Sykes
- School of Physics and Astronomy, University of Southampton, Southampton, UK
| | - L J Tacconi
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | | | - F Vincent
- LESIA - Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CNRS, Meudon, France
| | | | - S Uysal
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - F Widmann
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - E Wieprecht
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - E Wiezorrek
- Max Planck Institute for Extraterrestrial Physics, Garching, Germany
| | - J Woillez
- European Southern Observatory, Garching, Germany
| | - G Zins
- European Southern Observatory, Garching, Germany
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2
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Valente G, Ferreira P, Hernández-Rodríguez MA, Brites CDS, Amaral JS, Zelenovskii P, Paz FAA, Guieu S, Rocha J, Souto M. Exploring the Luminescence, Redox, and Magnetic Properties in a Multivariate Metal-Organic Radical Framework. Chem Mater 2024; 36:1333-1341. [PMID: 38370275 PMCID: PMC10870702 DOI: 10.1021/acs.chemmater.3c02460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 02/20/2024]
Abstract
Persistent neutral organic radicals are excellent building blocks for the design of functional molecular materials due to their unique electronic, magnetic, and optical properties. Among them, triphenylmethyl radical derivatives have attracted a lot of interest as luminescent doublet emitters. Although neutral organic radicals have been underexplored as linkers for building metal-organic frameworks (MOFs), they hold great potential as organic elements that could introduce additional electronic properties within these frameworks. Herein, we report the synthesis and characterization of a novel multicomponent metal-organic radical framework (PTMTCR@NR-Zn MORF), which is constructed from the combination of luminescent perchlorotriphenylmethyl tricarboxylic acid radical (PTMTCR) and nonemissive nonradical (PTMTCNR) organic linkers and Zn(II) ions. The PTMTCR@NR-Zn MORF structure is layered with microporous one-dimensional channels embedded within these layers. Kelvin probe force microscopy further confirmed the presence of both organic nonradical and radical linkers in the framework. The luminescence properties of the PTMTCR ligand (first studied in solution and in the solid state) were maintained in the radical-containing PTMTCR@NR-Zn MORF at room temperature as fluorescence solid-state quenching is suppressed thanks to the isolation of the luminescent radical linkers. In addition, magnetic and electrochemical properties were introduced to the framework due to the incorporation of the paramagnetic organic radical ligands. This work paves the way for the design of stimuli-responsive hybrid materials with tunable luminescence, electrochemical, and magnetic properties by the proper combination of closed- and open-shell organic linkers within the same framework.
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Affiliation(s)
- Gonçalo Valente
- Department
of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-393, Portugal
| | - Pedro Ferreira
- Department
of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-393, Portugal
| | | | - Carlos D. S. Brites
- Department
of Physics, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-393, Portugal
| | - João S. Amaral
- Department
of Physics, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-393, Portugal
| | - Pavel Zelenovskii
- Department
of Physics, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-393, Portugal
| | - Filipe A. Almeida Paz
- Department
of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-393, Portugal
| | - Samuel Guieu
- Department
of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-393, Portugal
- Department
of Chemistry, LAQV-REQUIMTE, University
of Aveiro, Aveiro 3810-393, Portugal
| | - João Rocha
- Department
of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-393, Portugal
| | - Manuel Souto
- Department
of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-393, Portugal
- CIQUS,
Centro Singular de Investigación en Química Bioloxica
e Materiais Moleculares, Departamento de Química-Física, Universidade de Santiago de Compostela, 15782 Santiago
de Compostela, Spain
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3
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Fontes LFB, Rocha J, Silva AMS, Guieu S. Excited-State Proton Transfer in Luminescent Dyes: From Theoretical Insight to Experimental Evidence. Chemistry 2023; 29:e202301540. [PMID: 37450664 DOI: 10.1002/chem.202301540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/07/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
The effective utilization of luminescent dyes often relies on a comprehensive understanding of their excitation and relaxation pathways. One such pathway, Excited-State Proton Transfer (ESPT), involves the tautomerization of the dye in its excited state, resulting in a new structure that exhibits distinct emission properties, such as a very large Stokes' shift or dual-emission. Although the ESPT phenomenon is well-explained theoretically, its experimental demonstration can be challenging due to the presence of numerous other phenomena that can yield similar experimental observations. In this review, we propose that an all-encompassing methodology, integrating experimental findings, computational analyses, and a thorough evaluation of diverse mechanisms, is essential for verifying the occurrence of ESPT in luminescent dyes. Investigations have offered significant understanding of the elements impacting the ESPT process and the array of approaches that can be used to validate the existence of ESPT. These discoveries hold crucial ramifications for the advancement of molecular probes, sensors, and other applications that depend on ESPT as a detection mechanism.
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Affiliation(s)
- Luís F B Fontes
- LAQV-REQUIMTE & Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
- CICECO-Aveiro Institute of Materials & Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - João Rocha
- CICECO-Aveiro Institute of Materials & Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Artur M S Silva
- LAQV-REQUIMTE & Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Samuel Guieu
- LAQV-REQUIMTE & Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
- CICECO-Aveiro Institute of Materials & Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
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4
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Ferreira JRM, Alves M, Sousa B, Vieira SI, Silva AMS, Guieu S, Cunha Â, Nunes da Silva R. Curcumin-based molecular probes for fluorescence imaging of fungi. Org Biomol Chem 2023; 21:1531-1536. [PMID: 36722743 DOI: 10.1039/d2ob01872a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Fluorescence imaging is a powerful and widely used method to visualize and study living organisms. However, fungi are notoriously difficult to visualize using fluorescence microscopy, given that their cell wall represents a diffusion barrier, and the synthetic organic dyes available are very limited when compared to molecular probes available for other organisms. Moreover, these dyes are usually available in only one colour, preventing co-staining experiments. To fill this gap, curcumin-based molecular probes were designed based on the rationale that curcumin is fluorescent and has moderate toxicity toward fungi, implying its ability to cross the cell wall to reach targets in the intracellular compartments. A family of boron diketonate complexes was synthesized, based on a curcumin backbone, tuning their emission color from blue to red. These probes did not present noticeable toxicity to filamentous fungus and, when applied to their visualization, readily entered the cells and precisely localized in sub-cellular organelles, enabling their visualization.
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Affiliation(s)
- Joana R M Ferreira
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal.
| | - Mariana Alves
- iBiMED, Department of Medical Sciences, University of Aveiro, Aveiro, Portugal
| | - Bárbara Sousa
- iBiMED, Department of Medical Sciences, University of Aveiro, Aveiro, Portugal
| | - Sandra I Vieira
- iBiMED, Department of Medical Sciences, University of Aveiro, Aveiro, Portugal
| | - Artur M S Silva
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal.
| | - Samuel Guieu
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal. .,CICECO Aveiro-Institute of Materials, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Ângela Cunha
- CESAM, Department of Biology, University of Aveiro, Aveiro, Portugal
| | - Raquel Nunes da Silva
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal. .,iBiMED, Department of Medical Sciences, University of Aveiro, Aveiro, Portugal
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5
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Ferreira JRM, Esteves CIC, Marques MMB, Guieu S. Locking the GFP Fluorophore to Enhance Its Emission Intensity. Molecules 2022; 28:molecules28010234. [PMID: 36615428 PMCID: PMC9822164 DOI: 10.3390/molecules28010234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 12/19/2022] [Accepted: 12/25/2022] [Indexed: 12/29/2022] Open
Abstract
The Green Fluorescent Protein (GFP) and its analogues have been widely used as fluorescent biomarkers in cell biology. Yet, the chromophore responsible for the fluorescence of the GFP is not emissive when isolated in solution, outside the protein environment. The most accepted explanation is that the quenching of the fluorescence results from the rotation of the aryl-alkene bond and from the Z/E isomerization. Over the years, many efforts have been performed to block these torsional rotations, mimicking the environment inside the protein β-barrel, to restore the emission intensity. Molecule rigidification through chemical modifications or complexation, or through crystallization, is one of the strategies used. This review presents an overview of the strategies developed to achieve highly emissive GFP chromophore by hindering the torsional rotations.
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Affiliation(s)
- Joana R. M. Ferreira
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago, 3010-193 Aveiro, Portugal
| | - Cátia I. C. Esteves
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago, 3010-193 Aveiro, Portugal
| | - Maria Manuel B. Marques
- LAQV-REQUIMTE, Department of Chemistry, School of Science and Technology, New University of Lisbon, 2829-516 Caparica, Portugal
| | - Samuel Guieu
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago, 3010-193 Aveiro, Portugal
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Campus de Santiago, 3010-193 Aveiro, Portugal
- Correspondence:
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6
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Pereira AL, Semitela Â, Girão AF, Completo A, Marques PAAP, Guieu S, Fernandes MHV. Three‐dimensional nanofibrous and porous scaffolds of poly(ε‐caprolactone)‐chitosan blends for musculoskeletal tissue engineering. J Biomed Mater Res A 2022; 111:950-961. [PMID: 36519714 DOI: 10.1002/jbm.a.37480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 11/16/2022] [Accepted: 12/01/2022] [Indexed: 12/23/2022]
Abstract
One of the established tissue engineering strategies relies on the fabrication of appropriate materials architectures (scaffolds) that mimic the extracellular matrix (ECM) and assist the regeneration of living tissues. Fibrous structures produced by electrospinning have been widely used as reliable ECM templates but their two-dimensional structure restricts, in part, cell infiltration and proliferation. A recent technique called thermally-induced self-agglomeration (TISA) allowed to alleviate this drawback by rearranging the 2D electrospun membranes into highly functional 3D porous-fibrous systems. Following this trend, the present research focused on preparing polycaprolactone/chitosan blends by electrospinning, to then convert them into 3D structures by TISA. By adding different amounts of chitosan, it was possible to accurately modulate the physicochemical properties of the obtained 3D nanofibrous scaffolds, leading to highly porous constructs with distinct morphologic and mechanical features. Viability and proliferation studies using adult human chondrocytes also revealed that the biocompatibility of the scaffolds was not impaired after 28 days of cell culture, highlighting their potential to be included into musculoskeletal tissue engineering applications, particularly cartilage repair.
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Affiliation(s)
- Andreia Leal Pereira
- CICECO – Aveiro Institute of Materials, Department of Materials and Ceramic Engineering University of Aveiro Aveiro Portugal
| | - Ângela Semitela
- TEMA, Department of Mechanical Engineering University of Aveiro Aveiro Portugal
| | - André F. Girão
- TEMA, Department of Mechanical Engineering University of Aveiro Aveiro Portugal
| | - António Completo
- TEMA, Department of Mechanical Engineering University of Aveiro Aveiro Portugal
| | | | - Samuel Guieu
- CICECO – Aveiro Institute of Materials, Department of Materials and Ceramic Engineering University of Aveiro Aveiro Portugal
- LAQV‐REQUIMTE, Department of Chemistry University of Aveiro Aveiro Portugal
| | - Maria Helena V. Fernandes
- CICECO – Aveiro Institute of Materials, Department of Materials and Ceramic Engineering University of Aveiro Aveiro Portugal
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7
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Esteves CIC, Fontes LFB, Rocha J, Silva AMS, Guieu S. Cover Feature: Influence of the Intramolecular Hydrogen Bond on the Fluorescence of 2‐
ortho
‐Aminophenyl Pyridines (Chem. Eur. J. 53/2022). Chemistry 2022. [DOI: 10.1002/chem.202202459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Cátia I. C. Esteves
- Department of Chemistry, LAQV-REQUIMTE University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
| | - Luís F. B. Fontes
- Department of Chemistry, LAQV-REQUIMTE University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
- Department of Chemistry CICECO-Aveiro Institute of Materials University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
| | - João Rocha
- Department of Chemistry CICECO-Aveiro Institute of Materials University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
| | - Artur M. S. Silva
- Department of Chemistry, LAQV-REQUIMTE University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
| | - Samuel Guieu
- Department of Chemistry, LAQV-REQUIMTE University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
- Department of Chemistry CICECO-Aveiro Institute of Materials University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
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8
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Esteves CIC, Fontes LFB, Rocha J, Silva AMS, Guieu S. Influence of the Intramolecular Hydrogen Bond on the Fluorescence of 2‐
ortho
‐Aminophenyl Pyridines. Chemistry 2022; 28:e202201844. [DOI: 10.1002/chem.202201844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Cátia I. C. Esteves
- Department of Chemistry, LAQV-REQUIMTE University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
| | - Luís F. B. Fontes
- Department of Chemistry, LAQV-REQUIMTE University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
- Department of Chemistry CICECO-Aveiro Institute of Materials University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
| | - João Rocha
- Department of Chemistry CICECO-Aveiro Institute of Materials University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
| | - Artur M. S. Silva
- Department of Chemistry, LAQV-REQUIMTE University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
| | - Samuel Guieu
- Department of Chemistry, LAQV-REQUIMTE University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
- Department of Chemistry CICECO-Aveiro Institute of Materials University of Aveiro Campus de Santiago 3810-193 Aveiro Portugal
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9
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Albuquerque HMT, Nunes da Silva R, Pereira M, Maia A, Guieu S, Soares AR, Santos CMM, Vieira SI, Silva AMS. Steroid-Quinoline Hybrids for Disruption and Reversion of Protein Aggregation Processes. ACS Med Chem Lett 2022; 13:443-448. [PMID: 35300075 PMCID: PMC8919386 DOI: 10.1021/acsmedchemlett.1c00604] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 02/08/2022] [Indexed: 12/21/2022] Open
Abstract
Reversing protein aggregation within cells may be an important tool to fight protein-misfolding disorders such as Alzheimer's, Parkinson's, and cardiovascular diseases. Here we report the design and synthesis of a family of steroid-quinoline hybrid compounds based on the framework combination approach. This set of hybrid compounds effectively inhibited Aβ1-42 self-aggregation in vitro by delaying the exponential growth phase and/or reducing the quantity of fibrils in the steady state. Their disaggregation efficacy was further demonstrated against preaggregated Aβ1-42 peptides in cellular assays upon their endocytosis by neuroblastoma cells, as they reverted both the number and the average area of fibrils back to basal levels. The antiaggregation effect of these hybrids was further tested and demonstrated in a cellular model of general protein aggregation expressing a protein aggregation fluorescent sensor. Together, our results show that the new cholesterol-quinoline hybrids possess wide and marked disaggregation capacities and are therefore promising templates for the development of new drugs to deal with conformational disorders.
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Affiliation(s)
- Hélio M T Albuquerque
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Raquel Nunes da Silva
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.,Department of Medical Sciences and Institute of Biomedicine, IBiMED, University of Aveiro, Agras do Crasto, 3810-193 Aveiro, Portugal
| | - Marisa Pereira
- Department of Medical Sciences and Institute of Biomedicine, IBiMED, University of Aveiro, Agras do Crasto, 3810-193 Aveiro, Portugal
| | - André Maia
- Instituto de Investigação e Inovação em Saúde (i3S) and Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto, 4200-135 Porto, Portugal
| | - Samuel Guieu
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.,CICECO Aveiro-Institute of Materials and Department of Chemistry, University of Aveiro, 3010-193 Aveiro, Portugal
| | - Ana Raquel Soares
- Department of Medical Sciences and Institute of Biomedicine, IBiMED, University of Aveiro, Agras do Crasto, 3810-193 Aveiro, Portugal
| | - Clementina M M Santos
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.,Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, 5300-252 Bragança, Portugal
| | - Sandra I Vieira
- Department of Medical Sciences and Institute of Biomedicine, IBiMED, University of Aveiro, Agras do Crasto, 3810-193 Aveiro, Portugal
| | - Artur M S Silva
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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10
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Costa LD, Guieu S, Faustino MDAF, Tomé AC. Straightforward synthesis of thiazolo[5,4- c]isoquinolines from dithiooxamide and 2-halobenzaldehydes. NEW J CHEM 2022. [DOI: 10.1039/d1nj05536d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thiazolo[5,4-c]isoquinolines, an (up to now) elusive family of compounds, are prepared in one reaction only from simple commercial reagents.
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Affiliation(s)
- Letícia D. Costa
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Samuel Guieu
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
- CICECO, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | | | - Augusto C. Tomé
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
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11
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Sciuti LF, Costa LD, Guieu S, Cocca LHZ, Iglesias BA, Mendonça CR, Tomé AC, Faustino MAF, De Boni L. Dependent excited state absorption and dynamic of β-BF 2 substituted metalloporphyrins: The metal ion effect. Spectrochim Acta A Mol Biomol Spectrosc 2021; 260:119911. [PMID: 33993027 DOI: 10.1016/j.saa.2021.119911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/11/2021] [Accepted: 05/02/2021] [Indexed: 06/12/2023]
Abstract
Absorption and relaxation dynamics of electronic states of free-base, Co(II), Cu(II) and Zn(II) porphyrins bearing a β-(2,2-difluoro-1,3,2-dioxaborinin-5-yl) group were investigated in dimethyl sulfoxide by using distinct time-resolved spectroscopic techniques. Furthermore, excited state absorption cross-section spectra were determined by combining white light continuum Z-Scan and transient absorption techniques. In the case of the free-base (2H) and Zn(II) porphyrins, we were able to quantify singlet-triplet conversion by analyzing the evolution of time-resolved fluorescence. Relaxation lifetimes from the excited to the ground state were observed in both porphyrins at nanosecond time scale. However, for Co(II) and Cu(II) metalloporphyrins it was observed in the picosecond time scale through femtosecond transient absorption, indicating that both compounds relax back to the ground state only by internal conversion processes. Co(II) and Cu(II) heavy atoms seem to prohibit the radiative and intersystem crossing processes.
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Affiliation(s)
- Lucas F Sciuti
- São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970 São Carlos, SP, Brazil
| | - Letícia D Costa
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Samuel Guieu
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; CICECO, Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Leandro H Z Cocca
- São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970 São Carlos, SP, Brazil
| | - Bernardo A Iglesias
- Laboratório de Bioinorgânica e Materiais Porfirínicos, Departamento de Química, Universidade Federal de Santa Maria, Av. Roraima 1000, Campus Camobi, 97105-900 Santa Maria, RS, Brazil
| | - Cleber R Mendonça
- São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970 São Carlos, SP, Brazil
| | - Augusto C Tomé
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - M Amparo F Faustino
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Leonardo De Boni
- São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970 São Carlos, SP, Brazil.
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12
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Ferreira JRM, Sierra-Garcia IN, Guieu S, Silva AMS, da Silva RN, Cunha Â. Photodynamic control of citrus crop diseases. World J Microbiol Biotechnol 2021; 37:199. [PMID: 34664127 DOI: 10.1007/s11274-021-03171-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/07/2021] [Indexed: 11/21/2022]
Abstract
Citrus are economically important fruit crops to which infectious diseases like citrus canker caused by Xanthomonas citri subs. citri, citrus variegated chlorosis caused by Xylella fastidiosa, "huanglongbing" associated with the presence of Candidatus liberibacter species, anthracnose caused by Colletotrichum gloeosporioides and citrus black spot caused by Phyllosticta citricarpa, impose significant losses. Control measures involve chemical treatment of orchards but often, eradication of infected plants is unavoidable. To circumvent the environmental impacts of pesticides and the socio-economic impacts of eradication, innovative antimicrobial approaches like photodynamic inactivation are being tested. There is evidence of the susceptibility of Xanthomonas citri subs. citri and C. gloeosporioides to photodynamic damage. However, the realistic assessment of perspectives for widespread application of photodynamic inactivation in the control of citrus diseases, necessarily implies that other microorganisms are also considered. This review intends to provide a critical summary of the current state of research on photodynamic inactivation of citrus pathogens and to identify some of the current limitations to the widespread use of photodynamic treatments in citrus crops.
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Affiliation(s)
- Joana R M Ferreira
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal.,CESAM and Department of Biology, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Isabel N Sierra-Garcia
- CESAM and Department of Biology, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Samuel Guieu
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal.,CICECO Aveiro-Institute of Materials, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Artur M S Silva
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal
| | - Raquel Nunes da Silva
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal.,IBiMED, Department of Medical Sciences, University of Aveiro, Campus do Crasto, 3810-193, Aveiro, Portugal
| | - Ângela Cunha
- CESAM and Department of Biology, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal.
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13
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Vaz PAAM, Rocha J, Silva AMS, Guieu S. Benzimidazole-Based N,O Boron Complexes as Deep Blue Solid-State Fluorophores. Materials (Basel) 2021; 14:ma14154298. [PMID: 34361489 PMCID: PMC8348718 DOI: 10.3390/ma14154298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/26/2021] [Accepted: 07/29/2021] [Indexed: 02/01/2023]
Abstract
Benzimidazole-based boranils were designed and synthesized in order to assess the influence of halogen substituents on their optoelectronic properties. All compounds are photoluminescent in solution and solid state. Compared to the free ligands, the new boranils emit at a lower wavelength, by elimination of the excited-state intramolecular proton transfer observed with the ligands. In the solid state, some of the boranils exhibit a deep blue emission, presenting Commission Internationale de l’Éclairage (CIE) coordinates with an x-component of less than 0.16 and a y-component smaller than 0.04, highly desired values for the development of blue emitting materials.
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Affiliation(s)
- Patrícia A. A. M. Vaz
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (P.A.A.M.V.); (A.M.S.S.)
- CICECO, Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
| | - João Rocha
- CICECO, Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
| | - Artur M. S. Silva
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (P.A.A.M.V.); (A.M.S.S.)
| | - Samuel Guieu
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (P.A.A.M.V.); (A.M.S.S.)
- CICECO, Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
- Correspondence:
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14
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Durães F, Silva PMA, Novais P, Amorim I, Gales L, Esteves CIC, Guieu S, Bousbaa H, Pinto M, Sousa E. Tetracyclic Thioxanthene Derivatives: Studies on Fluorescence and Antitumor Activity. Molecules 2021; 26:molecules26113315. [PMID: 34073048 PMCID: PMC8198043 DOI: 10.3390/molecules26113315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/22/2021] [Accepted: 05/26/2021] [Indexed: 01/07/2023] Open
Abstract
Thioxanthones are bioisosteres of the naturally occurring xanthones. They have been described for multiple activities, including antitumor. As such, the synthesis of a library of thioxanthones was pursued, but unexpectedly, four tetracyclic thioxanthenes with a quinazoline–chromene scaffold were obtained. These compounds were studied for their human tumor cell growth inhibition activity, in the cell lines A375-C5, MCF-7 and NCI-H460. Photophysical studies were also performed. Two of the compounds displayed GI50 values below 10 µM for the three tested cell lines, and structure–activity relationship studies were established. Three compounds presented similar wavelengths of absorption and emission, characteristic of dyes with a push-pull character. The structures of two compounds were elucidated by X-ray crystallography. Two tetracyclic thioxanthenes emerged as hit compounds. One of the two compounds accumulated intracellularly as a bright fluorescent dye in the green channel, as analyzed by both fluorescence microscopy and flow cytometry, making it a promising theranostic cancer drug candidate.
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Affiliation(s)
- Fernando Durães
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (F.D.); (M.P.)
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Novo Edifício do Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
| | - Patrícia M. A. Silva
- CESPU, Institute of Research and Advanced Training in Health Sciences and Technologies (IINFACTS), Rua Central de Gandra, 1317, 4585-116 Gandra, Portugal; (P.M.A.S.); (P.N.)
| | - Pedro Novais
- CESPU, Institute of Research and Advanced Training in Health Sciences and Technologies (IINFACTS), Rua Central de Gandra, 1317, 4585-116 Gandra, Portugal; (P.M.A.S.); (P.N.)
- Department of Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal
| | - Isabel Amorim
- GreenUPorto (Sustainable Agrifood Production) Research Center, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal;
| | - Luís Gales
- Department of Molecular Biology, ICBAS-Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal;
- Bioengineering & Synthetic Microbiology, I3S–Instituto de Investigação e Inovação em Saúde, University of Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
| | - Cátia I. C. Esteves
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (C.I.C.E.); (S.G.)
| | - Samuel Guieu
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (C.I.C.E.); (S.G.)
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Hassan Bousbaa
- CESPU, Institute of Research and Advanced Training in Health Sciences and Technologies (IINFACTS), Rua Central de Gandra, 1317, 4585-116 Gandra, Portugal; (P.M.A.S.); (P.N.)
- Correspondence: (H.B.); (E.S.)
| | - Madalena Pinto
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (F.D.); (M.P.)
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Novo Edifício do Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
| | - Emília Sousa
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (F.D.); (M.P.)
- CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Novo Edifício do Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
- Correspondence: (H.B.); (E.S.)
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15
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Abstract
A family of iminoboronates was prepared through a one-pot multicomponent reaction, starting from boronic acid, anthranilic acid, and different salicylaldehydes. Their synthesis was straightforward and the complexes were obtained in good to excellent yields. Their photophysical properties were assessed in a diluted solution, and the complexes proved to be faintly luminescent. These chelates demonstrated remarkable Aggregation-Induced Emission Enhancement, which was rationalized using crystal structures.
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Affiliation(s)
- Samuel Guieu
- LAQV/REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
| | - Cátia I. C. Esteves
- LAQV/REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
| | - João Rocha
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
| | - Artur M. S. Silva
- LAQV/REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;
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16
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Fontes LFB, Nunes da Silva R, Silva AMS, Guieu S. Unsymmetrical 2,4,6‐Triarylpyridines as Versatile Scaffolds for Deep‐Blue and Dual‐Emission Fluorophores. CHEMPHOTOCHEM 2020. [DOI: 10.1002/cptc.202000134] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Luís F. B. Fontes
- LAQV-REQUIMTE Department of Chemistry University of Aveiro 3010-193 Aveiro Portugal
| | - Raquel Nunes da Silva
- LAQV-REQUIMTE Department of Chemistry University of Aveiro 3010-193 Aveiro Portugal
- IBiMED-Institute of Biomedicine Department of Medical Sciences University of Aveiro 3010-193 Aveiro Portugal
| | - Artur M. S. Silva
- LAQV-REQUIMTE Department of Chemistry University of Aveiro 3010-193 Aveiro Portugal
| | - Samuel Guieu
- LAQV-REQUIMTE Department of Chemistry University of Aveiro 3010-193 Aveiro Portugal
- CICECO-Aveiro Institute of Materials Department of Chemistry University of Aveiro 3010-193 Aveiro Portugal
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17
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Castro KADF, Costa LD, Guieu S, Biazzotto JC, da Neves MGPMS, Faustino MAF, da Silva RS, Tomé AC. Photodynamic treatment of melanoma cells using aza-dipyrromethenes as photosensitizers. Photochem Photobiol Sci 2020; 19:885-891. [PMID: 32662457 DOI: 10.1039/d0pp00114g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In this study, we report for the first time the use of four aza-dipyrromethenes (ADPMs) as photosensitizers for cancer PDT. The synthesis and characterization of the ADPMs and their photodynamic action against B16F10 melanoma cells were assessed. ADPM 2 is the best singlet oxygen generator and the most phototoxic (at 2.5 μM) towards B16F10 cells.
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Affiliation(s)
- Kelly A D F Castro
- Department of Physics and Chemistry, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Letícia D Costa
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Portugal
| | - Samuel Guieu
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Portugal.,CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Portugal
| | - Juliana C Biazzotto
- Department of Physics and Chemistry, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, SP, Brazil
| | | | | | - Roberto S da Silva
- Department of Physics and Chemistry, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, SP, Brazil
| | - Augusto C Tomé
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Portugal
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18
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Abstract
Pyrroles are widely found in natural products and play an important role in biological processes. Certain pyrrole derivatives are fluorescent and may be used as molecular probes or biomarkers in the diagnosis of diseases, such as Alzheimer’s or Parkinson’s. Herein is reported the synthesis of five new pyrrole derivatives bearing phenyl rings on positions 1, 2, and 4, with electron-donating groups at the periphery. The introduction of more or stronger electron-donating groups red-shifts and increases the efficiency of the fluorescence emission.
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Affiliation(s)
| | - Raquel Nunes da Silva
- QOPNA, LAQV-REQUIMTE, Department of Chemistry, University of Aveiro
- Institute of Biomedicine (iBiMED), Department of Medical Sciences, University of Aveiro
| | - João Rocha
- CICECO, Aveiro Institute of Materials, Department of Chemistry, University of Aveiro
| | | | - Samuel Guieu
- QOPNA, LAQV-REQUIMTE, Department of Chemistry, University of Aveiro
- CICECO, Aveiro Institute of Materials, Department of Chemistry, University of Aveiro
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19
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Nunes da Silva R, Costa CC, Santos MJG, Alves MQ, Braga SS, Vieira SI, Rocha J, Silva AMS, Guieu S. Fluorescent Light-up Probe for the Detection of Protein Aggregates. Chem Asian J 2019; 14:859-863. [PMID: 30632287 DOI: 10.1002/asia.201801606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 12/02/2018] [Indexed: 01/10/2023]
Abstract
A fluorescent dye was decorated with water-soluble pyridinium groups in order to be applied in the detection of cyclodextrins or DNA. The dye displays an enhancement of its emission intensity when the internal rotations are restricted due to the formation of an inclusion complex with cyclodextrins or upon interaction with DNA. In vivo, the fluorescent probe can stain protein aggregates with a selectivity comparable to the widely used Proteostat®.
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Affiliation(s)
- Raquel Nunes da Silva
- Department of chemistry and QOPNA, University of Aveiro, Campus of Santiago, Aveiro, Portugal.,Department of Medical Sciences and Institute of Biomedicine, IBiMED, University of Aveiro, Agras do Crasto, Aveiro, Portugal
| | - Catarina C Costa
- Department of chemistry and QOPNA, University of Aveiro, Campus of Santiago, Aveiro, Portugal
| | - Maria J G Santos
- Department of chemistry and QOPNA, University of Aveiro, Campus of Santiago, Aveiro, Portugal
| | - Mariana Q Alves
- Department of Medical Sciences and Institute of Biomedicine, IBiMED, University of Aveiro, Agras do Crasto, Aveiro, Portugal
| | - Susana S Braga
- Department of chemistry and QOPNA, University of Aveiro, Campus of Santiago, Aveiro, Portugal
| | - Sandra I Vieira
- Department of Medical Sciences and Institute of Biomedicine, IBiMED, University of Aveiro, Agras do Crasto, Aveiro, Portugal
| | - João Rocha
- Department of chemistry and CICECO, University of Aveiro, Campus of Santiago, Aveiro, Portugal
| | - Artur M S Silva
- Department of chemistry and QOPNA, University of Aveiro, Campus of Santiago, Aveiro, Portugal
| | - Samuel Guieu
- Department of chemistry and QOPNA, University of Aveiro, Campus of Santiago, Aveiro, Portugal.,Department of chemistry and CICECO, University of Aveiro, Campus of Santiago, Aveiro, Portugal
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20
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Guieu S, Cardona F, Rocha J, Silva AMS. Tunable Color of Aggregation-Induced Emission Enhancement in a Family of Hydrogen-Bonded Azines and Schiff Bases. Chemistry 2018; 24:17262-17267. [PMID: 30175509 DOI: 10.1002/chem.201802581] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Indexed: 11/08/2022]
Abstract
A simple synthesis strategy afforded a family of hydrogen-bonded azines and Schiff-bases. Although in dilute solution these dyes are faint light emitters, all exhibit bright luminescence upon aggregation. Changing the peripheral substituents from electron donating to electron withdrawing allows emission fine-tuning in a range from bluish-green to orange-red. The crystal structures of the materials reveal that the restriction of intramolecular rotations is the main mechanism for the aggregation-induced emission enhancement properties.
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Affiliation(s)
- Samuel Guieu
- QOPNA, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.,CICECO, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Francisco Cardona
- QOPNA, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - João Rocha
- CICECO, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Artur M S Silva
- QOPNA, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
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21
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Abstract
A family of chiral boranils exhibits aggregation-induced emission enhancement.
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Affiliation(s)
- Patrícia A. A. M. Vaz
- QOPNA, Department of Chemistry, University of Aveiro
- Aveiro
- Portugal
- CICECO, Department of Chemistry, University of Aveiro
- Aveiro
| | - João Rocha
- CICECO, Department of Chemistry, University of Aveiro
- Aveiro
- Portugal
| | | | - Samuel Guieu
- QOPNA, Department of Chemistry, University of Aveiro
- Aveiro
- Portugal
- CICECO, Department of Chemistry, University of Aveiro
- Aveiro
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22
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23
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24
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Affiliation(s)
- Zhengyu Chen
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Samuel Guieu
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Nicholas G. White
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Francesco Lelj
- La. M.I. and LaSSCAM INSTM Sezione Basilicata; Dipartimento di Chimica; Università della Basilicata; Via dell'Ateneo Lucano 10 85100 Potenza Italy
| | - Mark J. MacLachlan
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
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25
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Seixas RSGR, Ribeiro GC, Guieu S, Silva AMS. Sequential multicomponent synthesis of highly functionalized pyridin-2(1 H)-one derivatives. ChemistrySelect 2016. [DOI: 10.1002/slct.201600080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Gustavo C. Ribeiro
- Department of Chemistry & QOPNA; University of Aveiro; 3810-193 Aveiro Portugal
| | - Samuel Guieu
- Department of Chemistry & QOPNA; University of Aveiro; 3810-193 Aveiro Portugal
- Department of Chemistry & CICECO; University of Aveiro; 3810-193 Aveiro Portugal
| | - Artur M. S. Silva
- Department of Chemistry & QOPNA; University of Aveiro; 3810-193 Aveiro Portugal
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26
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Abstract
Decorating the periphery of chalcones with halogen atoms increased their aggregation-induced emission enhancement properties, even if their optoelectronic properties are dominated by the other substituents.
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Affiliation(s)
| | - João Rocha
- University of Aveiro
- CICECO
- Department of Chemistry
- 3810-193 Aveiro
- Portugal
| | - Artur M. S. Silva
- University of Aveiro
- QOPNA
- Department of Chemistry
- 3810-193 Aveiro
- Portugal
| | - Samuel Guieu
- University of Aveiro
- QOPNA
- Department of Chemistry
- 3810-193 Aveiro
- Portugal
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27
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Guieu S, Pinto J, Silva VLM, Rocha J, Silva AMS. Synthesis, Post-Modification and Fluorescence Properties of Boron Diketonate Complexes. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500318] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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28
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Affiliation(s)
| | - Artur Silva
- Department of Chemistry, QOPNA, University of Aveiro
| | - Diana Resende
- Department of Chemistry, QOPNA, University of Aveiro
| | - Samuel Guieu
- Department of Chemistry, QOPNA, University of Aveiro
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29
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Resende DI, Guieu S, Oliva CG, Silva AM. Synthesis of 2,6-diaryl-1,2-dihydropyridines through a 6π-electrocyclization of N-sulfonylazatrienes. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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Abstract
Decorating the periphery of dimeric boranils with phenyl substituents enhanced their emission efficiency, even if the substituents are not conjugated with the boron centers.
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Affiliation(s)
- Samuel Guieu
- QOPNA
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro, Portugal
- CICECO
| | - Francisco Cardona
- QOPNA
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro, Portugal
| | - João Rocha
- CICECO
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro, Portugal
| | - Artur M. S. Silva
- QOPNA
- Department of Chemistry
- University of Aveiro
- 3810-193 Aveiro, Portugal
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31
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32
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Affiliation(s)
- Samuel Guieu
- CICECO, Department of Chemistry, University of Aveiro
| | - Artur Silva
- QOPNA, Department of Chemistry, University of Aveiro
| | - João Rocha
- CICECO, Department of Chemistry, University of Aveiro
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33
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34
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Frischmann PD, Sahli BJ, Guieu S, Patrick BO, MacLachlan MJ. Sterically-Limited Self-Assembly of Pt4Macrocycles into Discrete Non-covalent Nanotubes: Porous Supramolecular Tetramers and Hexamers. Chemistry 2012; 18:13712-21. [DOI: 10.1002/chem.201201536] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Indexed: 11/10/2022]
Affiliation(s)
- Peter D Frischmann
- Department of Chemistry, University of British Columbia, Vancouver, Canada
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35
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Guieu S, Brandão P, Rocha J, Silva AMS. Dimethyl 5,5'-methyl-enebis(2-hy-droxy-benzoate). Acta Crystallogr Sect E Struct Rep Online 2012; 68:o1404. [PMID: 22590292 PMCID: PMC3344530 DOI: 10.1107/s1600536812015760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 04/11/2012] [Indexed: 11/10/2022]
Abstract
In the title compound, C(17)H(16)O(6), the two methyl salicylate moieties are related by crystallographic twofold rotational symmetry with the two benzene rings close to being perpendicular [inter-ring dihedral angle = 86.6 (8)°]. Intra-molecular phenolic O-H⋯O hydrogen bonds with carboxyl O-atom acceptors are present, with these groups also involved in centrosymmetric cyclic inter-molecular O-H⋯O hydrogen-bonding associations [graph set R(2) (2)(4)], giving infinite chains extending across (101).
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36
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Zaborova E, Deschamp J, Guieu S, Blériot Y, Poli G, Ménand M, Madec D, Prestat G, Sollogoub M. Cavitand supported tetraphosphine: cyclodextrin offers a useful platform for Suzuki-Miyaura cross-coupling. Chem Commun (Camb) 2011; 47:9206-8. [DOI: 10.1039/c1cc12241j] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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37
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Guieu S, Crane AK, MacLachlan MJ. Campestarenes: novel shape-persistent Schiff basemacrocycles with 5-fold symmetry. Chem Commun (Camb) 2011; 47:1169-71. [DOI: 10.1039/c0cc04493h] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Mimouni S, Lamy JS, Lavieville J, Guieu S, Martin M. Modelling of sprays in containment applications with A CMFD code. Nuclear Engineering and Design 2010. [DOI: 10.1016/j.nucengdes.2009.11.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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39
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Deunf E, Zaborova E, Guieu S, Blériot Y, Verpeaux JN, Buriez O, Sollogoub M, Amatore C. Synthesis and Electrochemical Study of an Original Copper(II)-Capped Salen-Cyclodextrin Complex. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200901208] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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40
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Affiliation(s)
- Peter D. Frischmann
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Samuel Guieu
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Raymond Tabeshi
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Mark J. MacLachlan
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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41
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Guieu S, Zaborova E, Blériot Y, Poli G, Jutand A, Madec D, Prestat G, Sollogoub M. Can Hetero-Polysubstituted Cyclodextrins be Considered as Inherently Chiral Concave Molecules? Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200907156] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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42
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Guieu S, Zaborova E, Blériot Y, Poli G, Jutand A, Madec D, Prestat G, Sollogoub M. Can Hetero-Polysubstituted Cyclodextrins be Considered as Inherently Chiral Concave Molecules? Angew Chem Int Ed Engl 2010; 49:2314-8. [DOI: 10.1002/anie.200907156] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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43
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Guieu S, Sollogoub M. Regiospecific tandem azide-reduction/deprotection to afford versatile amino alcohol-functionalized alpha- and beta-cyclodextrins. Angew Chem Int Ed Engl 2008; 47:7060-3. [PMID: 18666299 DOI: 10.1002/anie.200801573] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Samuel Guieu
- Institut de Chimie Moléculaire (FR 2769), Laboratoire de Chimie Organique (UMR CNRS 7611), UPMC Univ Paris 06, Tours 44-45, 1er étage, C. 181, 4 place Jussieu, 75005 Paris, France
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44
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Sollogoub M, Guieu S, Geoffroy M, Yamada A, Estévez-Torres A, Yoshikawa K, Baigl D. Photocontrol of Single-Chain DNA Conformation in Cell-Mimicking Microcompartments. Chembiochem 2008; 9:1201-6. [DOI: 10.1002/cbic.200800072] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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45
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Affiliation(s)
- Samuel Guieu
- UPMC Univ Paris 06, Institut de Chimie Moléculaire (FR 2769), Laboratoire de Chimie Organique (UMR CNRS 7611), 4 place Jussieu, C. 181, F-75005 Paris, France
| | - Matthieu Sollogoub
- UPMC Univ Paris 06, Institut de Chimie Moléculaire (FR 2769), Laboratoire de Chimie Organique (UMR CNRS 7611), 4 place Jussieu, C. 181, F-75005 Paris, France
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46
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Sardinha J, Guieu S, Deleuze A, Fernández-Alonso MC, Rauter AP, Sinaÿ P, Marrot J, Jiménez-Barbero J, Sollogoub M. gem-Difluoro-carbasugars, the cases of mannopyranose and galactopyranose. Carbohydr Res 2007; 342:1689-703. [PMID: 17559817 DOI: 10.1016/j.carres.2007.05.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2007] [Revised: 05/07/2007] [Accepted: 05/11/2007] [Indexed: 10/23/2022]
Abstract
5a-Difluoro-5a-carbamannopyranose (gem-difluoro-carbamannopyranose) and 5a-difluoro-5a-carbagalactopyranose (gem-difluoro-carbagalactopyranose), close congeners of their respective natural sugars, in which the endocyclic oxygen atom has been replaced by a gem-difluoromethylene group, were synthesized from D-mannose and D-galactose, using a rearrangement strategy.
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Affiliation(s)
- João Sardinha
- Université Pierre et Marie Curie-Paris 6, Institut de Chimie Moléculaire (FR 2769), ENS, UMR CNRS 8642, 75005 Paris, France
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47
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Condette-Auliac S, Bracard S, Foscolo S, Boulin A, Schmitt E, Rodesch G, Guieu S, Anxionnat R. L'IRM: unique examen à réaliser dans le cadre du bilan des hématomes intracrâniens. J Neuroradiol 2007. [DOI: 10.1016/j.neurad.2007.01.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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48
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Rodesch G, Gaillard S, Graveleau P, Boulin A, Condette-Auliac S, Guieu S. Prise en charge endovasculaire de shunts artérioveineux duraux intracrâniens. À propos d'une série consécutive de 65 patients. J Neuroradiol 2007. [DOI: 10.1016/j.neurad.2007.01.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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49
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Coskun O, Hamon M, Guieu S, Saoud M, Courtheoux P. P-18 Apport de la tractographie dans l’imagerie du faisceau pyramidal. J Neuroradiol 2005. [DOI: 10.1016/s0150-9861(05)83098-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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50
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Coskun O, Hamon M, Guieu S, Baud J, Boute C, Courtheoux P. P-36 Angio-IRM 3D-Contraste elliptique : exploration du système veineux intracrânien. J Neuroradiol 2005. [DOI: 10.1016/s0150-9861(05)83116-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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