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Godard A, Galán LA, Rouillon J, Al Shehimy S, Tajani W, Cave C, Malacea-Kabbara R, Rousselin Y, Le Gendre P, Fihey A, Bendellaa M, Busser B, Sancey L, Le Guennic B, Bucher C, Maury O, Goze C, Bodio E. Al(III) and Ga(III) Bisphenolate Azadipyrromethene-Based “N 2O 2” Complexes as Efficient NIR-Fluorophores. Inorg Chem 2022; 62:5067-5080. [PMID: 36541863 DOI: 10.1021/acs.inorgchem.2c03918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Aza-boron-dipyrromethenes (Aza-BODIPYs) are an increasingly studied class of fluorophores. They can be seen as an azadipyrromethene ("aza-DIPY") ligand rigidified by a metalloid, a boron atom. Based on this idea, a series of complexes of group 13 metals (aluminum and gallium) have been synthesized and characterized. The impact of the metal and of the nature of the substituents of aza-DIPY core were investigated. The photophysical and electrochemical properties were determined, and an X-ray structure of an azaGaDIPY was obtained. These data reveal that azaGaDIPY and azaAlDIPY exhibit significant red-shifted fluorescence compared to their analogue aza-BODIPY. Their emission can go up to 800 nm for the maximum emission length and up to NIR-II for the emission tail. This, associated with their electrochemical stability (no metal release whether oxidized or reduced) makes them a promising class of fluorophores for optical medical imaging. Moreover, X-ray structure and molecular modeling studies have shown that this redshift seems to be more due to the geometry around the boron/metal than to the nature of the metal.
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Affiliation(s)
- Amélie Godard
- Institut de Chimie Moléculaire de l’Université de Bourgogne, Université Bourgogne Franche-Comté, CNRS UMR 6302, F-21000 Dijon, France
| | - Laura Abad Galán
- Univ Lyon, ENS de Lyon, CNRS UMR 5182, Laboratoire de Chimie, F-69342 Lyon, France
| | - Jean Rouillon
- Univ Lyon, ENS de Lyon, CNRS UMR 5182, Laboratoire de Chimie, F-69342 Lyon, France
| | - Shaymaa Al Shehimy
- Univ Lyon, ENS de Lyon, CNRS UMR 5182, Laboratoire de Chimie, F-69342 Lyon, France
| | - Wassima Tajani
- Institut de Chimie Moléculaire de l’Université de Bourgogne, Université Bourgogne Franche-Comté, CNRS UMR 6302, F-21000 Dijon, France
| | - Charlotte Cave
- Institut de Chimie Moléculaire de l’Université de Bourgogne, Université Bourgogne Franche-Comté, CNRS UMR 6302, F-21000 Dijon, France
| | - Raluca Malacea-Kabbara
- Institut de Chimie Moléculaire de l’Université de Bourgogne, Université Bourgogne Franche-Comté, CNRS UMR 6302, F-21000 Dijon, France
| | - Yoann Rousselin
- Institut de Chimie Moléculaire de l’Université de Bourgogne, Université Bourgogne Franche-Comté, CNRS UMR 6302, F-21000 Dijon, France
| | - Pierre Le Gendre
- Institut de Chimie Moléculaire de l’Université de Bourgogne, Université Bourgogne Franche-Comté, CNRS UMR 6302, F-21000 Dijon, France
| | - Arnaud Fihey
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000 Rennes, France
| | - Mohamed Bendellaa
- Univ. Grenoble Alpes, INSERM U 1209, CNRS UMR 5309, Institute for Advanced Biosciences, 38000 Grenoble, France
| | - Benoit Busser
- Univ. Grenoble Alpes, INSERM U 1209, CNRS UMR 5309, Institute for Advanced Biosciences, 38000 Grenoble, France
- Department of Clinical Biochemistry, Grenoble Alpes University Hospital, 38043 Grenoble, France
- Institut Universitaire de France (IUF), 75005 Paris, France
| | - Lucie Sancey
- Univ. Grenoble Alpes, INSERM U 1209, CNRS UMR 5309, Institute for Advanced Biosciences, 38000 Grenoble, France
| | - Boris Le Guennic
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, 35000 Rennes, France
| | - Christophe Bucher
- Univ Lyon, ENS de Lyon, CNRS UMR 5182, Laboratoire de Chimie, F-69342 Lyon, France
| | - Olivier Maury
- Univ Lyon, ENS de Lyon, CNRS UMR 5182, Laboratoire de Chimie, F-69342 Lyon, France
| | - Christine Goze
- Institut de Chimie Moléculaire de l’Université de Bourgogne, Université Bourgogne Franche-Comté, CNRS UMR 6302, F-21000 Dijon, France
| | - Ewen Bodio
- Institut de Chimie Moléculaire de l’Université de Bourgogne, Université Bourgogne Franche-Comté, CNRS UMR 6302, F-21000 Dijon, France
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Kim D, Gray TG, Teets TS. Heteroleptic copper(I) charge-transfer chromophores with panchromatic absorption. Chem Commun (Camb) 2022; 58:11446-11449. [PMID: 36148809 DOI: 10.1039/d2cc03873k] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four new heteroleptic bis-chelate Cu(I) complexes showing panchromatic visible absorption are described here. With this heteroleptic design, we demonstrate that the energy levels of the spatially separated HOMO and LUMO can be independently and systematically controlled via ligand modification, with charge-transfer absorption bands throughout the visible and NIR regions that cover a wider range than typical Cu(I) chromophores.
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Affiliation(s)
- Dooyoung Kim
- Department of Chemistry, University of Houston, 3585 Cullen Blvd. Room 112, Houston, TX, 77204-5003, USA.
| | - Thomas G Gray
- Department of Chemistry, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Thomas S Teets
- Department of Chemistry, University of Houston, 3585 Cullen Blvd. Room 112, Houston, TX, 77204-5003, USA.
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Soellner J, Císařová I, Strassner T. Ruthenium(II) Bipyridyl Complexes with C∧C* Cyclometalated Mesoionic Carbene Ligands. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00637] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Johannes Soellner
- Physikalische Organische Chemie, Technische Universität Dresden, 01069 Dresden, Germany
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University Prague, 128 43 Praha 2, Czech Republic
| | - Thomas Strassner
- Physikalische Organische Chemie, Technische Universität Dresden, 01069 Dresden, Germany
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Mede T, Jäger M, Schubert US. "Chemistry-on-the-complex": functional Ru II polypyridyl-type sensitizers as divergent building blocks. Chem Soc Rev 2018; 47:7577-7627. [PMID: 30246196 DOI: 10.1039/c8cs00096d] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Ruthenium polypyridyl type complexes are potent photoactive compounds, and have found - among others - a broad range of important applications in the fields of biomedical diagnosis and phototherapy, energy conversion schemes such as dye-sensitized solar cells (DSSCs) and molecular assemblies for tailored photo-initiated processes. In this regard, the linkage of RuII polypyridyl-type complexes with specific functional moieties is highly desirable to enhance their inherent photophysical properties, e.g., with a targeting function to achieve cell selectivity, or with a dye or redox-active subunits for energy- and electron-transfer. However, the classical approach of performing ligand syntheses first and the formation of Ru complexes in the last steps imposes synthetic limitations with regard to tolerating functional groups or moieties as well as requiring lengthy convergent routes. Alternatively, the diversification of Ru complexes after coordination (termed "chemistry-on-the-complex") provides an elegant complementary approach. In addition to the Click chemistry concept, the rapidly developing synthesis and purification methodologies permit the preparation of Ru conjugates via amidation, alkylation and cross-coupling reactions. In this regard, recent developments in chromatography shifted the limits of purification, e.g., by using new commercialized surface-modified silica gels and automated instrumentation. This review provides detailed insights into applying the "chemistry-on-the-complex" concept, which is believed to stimulate the modular preparation of unpreceded molecular assemblies as well as functional materials based on Ru-based building blocks, including combinatorial approaches.
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Affiliation(s)
- Tina Mede
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany.
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Whittemore TJ, White TA, Turro C. New Ligand Design Provides Delocalization and Promotes Strong Absorption throughout the Visible Region in a Ru(II) Complex. J Am Chem Soc 2017; 140:229-234. [PMID: 29260869 DOI: 10.1021/jacs.7b09389] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The new Ru(II)-anthraquinone complex [Ru(bpy)2(qdpq)](PF6)2 (Ru-qdpq; bpy = 2,2'-bipyridine; qdpq = 2,3-di(2-pyridyl)naphtho[2,3-f]quinoxaline-7,12-quinone) possesses a strong 1MLCT Ru → qdpq absorption with a maximum at 546 nm that tails into the near-IR and is significantly red-shifted relative to that of the related complex [Ru(bpy)2(qdppz)](PF6)2 (Ru-qdppz; qdppz = naphtho[2,3-a]dipyrido[3,2-h:2',3'-f]phenazine-5,18-dione), with λmax = 450 nm. Ru-qdppz possesses electronically isolated proximal and distal qdppz-based excited states; the former is initially generated and decays to the latter, which repopulates the ground state with τ = 362 ps. In contrast, excitation of Ru-qdpq results in the population of a relatively long-lived (τ = 19 ns) Ru(dπ) → qdpq(π*) 3MLCT excited state where the promoted electron is delocalized throughout the qdpq ligand. Ultrafast spectroscopy, used together with steady-state absorption, electrochemistry, and DFT calculations, indicates that the unique coordination modes of the qdpq and qdppz ligands impart substantially different electronic communication throughout the quinone-containing ligand, affecting the excited state and electron transfer properties of these molecules. These observations create a pathway to synthesize complexes with red-shifted absorptions that possess long-lived, redox-active excited states that are useful for various applications, including solar energy conversion and photochemotherapy.
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Affiliation(s)
- Tyler J Whittemore
- Department of Chemistry and Biochemistry, The Ohio State University , Columbus, Ohio 43210, United States
| | - Travis A White
- Department of Chemistry and Biochemistry, The Ohio State University , Columbus, Ohio 43210, United States
| | - Claudia Turro
- Department of Chemistry and Biochemistry, The Ohio State University , Columbus, Ohio 43210, United States
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Schleicher D, Leopold H, Borrmann H, Strassner T. Ruthenium(II) Bipyridyl Complexes with Cyclometalated NHC Ligands. Inorg Chem 2017; 56:7217-7229. [DOI: 10.1021/acs.inorgchem.7b00831] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David Schleicher
- Physikalische Organische
Chemie, Technische Universität Dresden, 01069 Dresden, Germany
| | - Hendrik Leopold
- Physikalische Organische
Chemie, Technische Universität Dresden, 01069 Dresden, Germany
| | - Horst Borrmann
- Max-Planck-Institut für Chemische Physik fester Stoffe, 01187 Dresden, Germany
| | - Thomas Strassner
- Physikalische Organische
Chemie, Technische Universität Dresden, 01069 Dresden, Germany
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