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Tejeda-Orusco V, Andreu R, Orduna J, Villacampa B, Franco S, Civera A. Twisted One-Dimensional Charge Transfer and Related Y-Shaped Chromophores with a 4 H-Pyranylidene Donor: Synthesis and Optical Properties. J Org Chem 2021; 86:3152-3163. [PMID: 33530683 PMCID: PMC9161450 DOI: 10.1021/acs.joc.0c02438] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Three series of push–pull
derivatives bearing 4H-pyranylidene as electron donor
group and a variety of acceptors
were designed. On one hand, one-dimensional chromophores with a thiophene
ring (series 1H) or 5-dimethylaminothiophene moiety (series 1N) as an auxiliary donor, non-coplanar with the π-conjugated
system, were synthesized. On the other hand, related two-dimensional
(2D) Y-shaped chromophores (series 2) were also prepared
to compare how the diverse architectures affect the electrochemical,
linear, and second-order nonlinear optical (NLO) properties. The presence
of the 5-dimethylaminothiophene moiety in the exocyclic C=C
bond of the pyranylidene unit gives rise to oxidation potentials rarely
low, and the protonation (with an excess of trifluoroacetic acid)
of its derivatives results in the apparition of a new blue-shifted
band in the UV–visible spectra. The analysis of the properties
of derivatives with and without the additional thiophene ring shows
that this auxiliary donor leads to a higher NLO response, accompanied
by an enhanced transparency. Y-shaped chromophores of series 2 present a blue-shifted absorption, higher molar extinction
coefficients, and higher Eox values compared
to their linear twisted counterparts. As concerns NLO properties,
2D Y-shaped architecture gives rise to somewhat lower μβ
values (except for thiobarbiturate derivatives).
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Affiliation(s)
- Víctor Tejeda-Orusco
- Instituto de Nanociencia y Materiales de Aragón (INMA)-Departamento de Química Orgánica, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Raquel Andreu
- Instituto de Nanociencia y Materiales de Aragón (INMA)-Departamento de Química Orgánica, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Jesús Orduna
- Instituto de Nanociencia y Materiales de Aragón (INMA)-Departamento de Química Orgánica, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Belén Villacampa
- Instituto de Nanociencia y Materiales de Aragón (INMA)-Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Santiago Franco
- Instituto de Nanociencia y Materiales de Aragón (INMA)-Departamento de Química Orgánica, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - Alba Civera
- Instituto de Nanociencia y Materiales de Aragón (INMA)-Departamento de Química Orgánica, CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
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2
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Nojo W, Tamaoki H, Ishigaki Y, Katoono R, Fujiwara K, Fukushima T, Suzuki T. Molecular Wires with Controllable π-Delocalization Incorporating Redox-Triggered π-Conjugated Switching Units. Chempluschem 2020; 84:634-642. [PMID: 31944008 DOI: 10.1002/cplu.201800341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Indexed: 11/11/2022]
Abstract
A perfluorobiphenyl-2,2'-diyl dication and its corresponding dihydrophenanthrene-type electron donor are interconvertible upon two-electron transfer. Redox-triggered C-C bond-formation/cleavage caused a drastic change in the torsion angle of the biphenyl unit. Thus, π-delocalization ON/OFF switching was observed as a change in the UV absorption upon electrolysis of the linearly extended analogue with two phenylethynyl groups. A further extended π-system with a molecular length of ca. 3.5 nm, which has two switching units, was synthesized. Spectroelectrograms as well as voltammetric analyses showed that the two units act nearly simultaneously because of the very small inter-unit electrostatic repulsion in the tetracationic state. Thus, the present pair is a promising candidate as a switching unit for "molecular wires" with controllable π-delocalization, in which a higher ON/OFF ratio of delocalization could be realized by incorporating multiple switching units.
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Affiliation(s)
- Wataru Nojo
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Hitomi Tamaoki
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Yusuke Ishigaki
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Ryo Katoono
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Kenshu Fujiwara
- Department of Life Science, Graduate School of Engineering, Akita University, Akita, 010-8502, Japan
| | - Takanori Fukushima
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, 226-8503, Japan
| | - Takanori Suzuki
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
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3
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Wojcik L, López I, Gauthier S, Cabon N, Le Poul P, Gloaguen F, Le Poul N. Insights into the radical-radical and radical-substrate dimerization processes for substituted phenylmethylenepyrans. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.03.046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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4
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Novoa N, Manzur C, Roisnel T, Dorcet V, Cabon N, Robin-Le Guen F, Ledoux-Rak I, Kahlal S, Saillard JY, Carrillo D, Hamon JR. Redox-switching of ternary Ni(ii) and Cu(ii) complexes: synthesis, experimental and theoretical studies along with second-order nonlinear optical properties. NEW J CHEM 2019. [DOI: 10.1039/c9nj01774g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The redox-switching behavior of the title compounds has been probed for the Ni(ii) derivatives using time-resolved spectroelectrochemistry under thin-layer conditions.
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5
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Durand RJ, Gauthier S, Achelle S, Kahlal S, Saillard JY, Barsella A, Wojcik L, Le Poul N, Robin-Le Guen F. Incorporation of a platinum center in the pi-conjugated core of push-pull chromophores for nonlinear optics (NLO). Dalton Trans 2018; 46:3059-3069. [PMID: 28217794 DOI: 10.1039/c7dt00252a] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In this article, we describe the synthesis, redox characteristics, and linear and nonlinear optical (NLO) properties of seven new unsymmetrical push-pull diacetylide platinum-based complexes. These D-π-Pt-π-A complexes incorporate pyranylidene ligands as pro-aromatic donor groups (D), diazine rings as electron-withdrawing groups (A), and various aromatic fragments (styryl or thienylvinyl) as π-linkers separating the platinum diacetylide unit from the donor and the acceptor groups. This is one of the first examples of push-pull chromophores incorporating a platinum center in the π-conjugated core. The NLO properties of these complexes were compared with those of their purely organic analogues. All compounds (organic and organometallic) exhibited positive μβ values, which dramatically increased upon methylation of the pyrimidine fragment. However, this increase was even more significant in the complexes due to the presence of platinum in the π-conjugated core. The effects of the linker on the redox and spectroscopic properties of the complexes are also discussed. In addition, DFT calculations were performed in order to gain further insight into the intramolecular charge transfer (ICT) occurring through the platinum center.
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Affiliation(s)
- Raphaël J Durand
- Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, IUT de Lannion, rue Edouard Branly, BP 30219, F-22302 Lannion Cedex, France.
| | - Sébastien Gauthier
- Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, IUT de Lannion, rue Edouard Branly, BP 30219, F-22302 Lannion Cedex, France.
| | - Sylvain Achelle
- Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, IUT de Lannion, rue Edouard Branly, BP 30219, F-22302 Lannion Cedex, France.
| | - Samia Kahlal
- Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, Campus de Beaulieu, 263 av. Général Leclerc, 35042 Rennes, France
| | - Jean-Yves Saillard
- Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, Campus de Beaulieu, 263 av. Général Leclerc, 35042 Rennes, France
| | - Alberto Barsella
- Département d'Optique ultra-rapide et Nanophotonique, IPCMS-CNRS, 23 rue du Loess, BP 43, 67034 Strasbourg Cedex 2, France
| | - Laurianne Wojcik
- Laboratoire de Chimie, Électrochimie Moléculaires et Chimie Analytique, UMR CNRS 6521, Université de Bretagne Occidentale, UFR Sciences et Techniques, 6 avenue Victor Le Gorgeu - CS 93837, F-29238 Brest Cedex 3, France
| | - Nicolas Le Poul
- Laboratoire de Chimie, Électrochimie Moléculaires et Chimie Analytique, UMR CNRS 6521, Université de Bretagne Occidentale, UFR Sciences et Techniques, 6 avenue Victor Le Gorgeu - CS 93837, F-29238 Brest Cedex 3, France
| | - Françoise Robin-Le Guen
- Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, IUT de Lannion, rue Edouard Branly, BP 30219, F-22302 Lannion Cedex, France.
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6
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Wojcik L, Michaud F, Gauthier S, Cabon N, Le Poul P, Gloaguen F, Le Poul N. Reversible Redox Switching of Chromophoric Phenylmethylenepyrans by Carbon-Carbon Bond Making/Breaking. J Org Chem 2017; 82:12395-12405. [PMID: 29058426 DOI: 10.1021/acs.joc.7b02199] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Electrochromic organic systems that can undergo substantial variation of their optical properties upon electron stimulus are of high interest for the development of functional materials. In particular, devices based on radical dimerization are appropriate because of the effectiveness and speed of carbon-carbon bond making/breaking. Phenylmethylenepyrans are organic chromophores which are well suited for such purposes since their oxidation leads to the reversible formation of bispyrylium species by radical dimerization. In this paper, we show that the redox and spectroscopic properties of phenylmethylenepyrans can be modulated by adequate variation of the substituting group on the para position of the phenyl moiety, as supported by DFT calculations. This redox switching is reversible over several cycles and is accompanied by a significant modification of the UV-vis spectrum of the chromophore, as shown by time-resolved spectroelectrochemistry in thin-layer conditions.
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Affiliation(s)
- Laurianne Wojcik
- Laboratoire CEMCA, CNRS UMR 6521, Université de Bretagne Occidentale , 6 Avenue Le Gorgeu, CS 93837, Brest 29238 Cedex, France
| | - François Michaud
- Service PIMM-DRX, Université de Bretagne Occidentale , 6 Avenue Le Gorgeu, CS 93837, Brest29238 Cedex, France
| | - Sébastien Gauthier
- IUT de Lannion, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Université de Rennes 1 , Rue Edouard Branly, 22300 Lannion, France
| | - Nolwenn Cabon
- IUT de Lannion, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Université de Rennes 1 , Rue Edouard Branly, 22300 Lannion, France
| | - Pascal Le Poul
- IUT de Lannion, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Université de Rennes 1 , Rue Edouard Branly, 22300 Lannion, France
| | - Frederic Gloaguen
- Laboratoire CEMCA, CNRS UMR 6521, Université de Bretagne Occidentale , 6 Avenue Le Gorgeu, CS 93837, Brest 29238 Cedex, France
| | - Nicolas Le Poul
- Laboratoire CEMCA, CNRS UMR 6521, Université de Bretagne Occidentale , 6 Avenue Le Gorgeu, CS 93837, Brest 29238 Cedex, France
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New 8-substituted BODIPY-based chromophores: synthesis, optical and electrochemical properties. HETEROCYCL COMMUN 2016. [DOI: 10.1515/hc-2016-0151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractBODIPY-based chromophores, in which an electron withdrawing difluoro-boraindacene fragment is connected via position 8 to different donor fragments, were synthesized. Their electrochemical and photophysical properties were studied. All compounds exhibit a quasi-reversible oxidation corresponding to the formation of a BODIPY π-radical cation at around 0.8 V vs. FeCp
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8
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Anisyl and ferrocenyl adducts of methylenepyran-containing β-diketone: Synthesis, spectral, structural, and redox properties. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.03.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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Gauthier S, Caro B, Robin-Le Guen F, Bhuvanesh N, Gladysz JA, Wojcik L, Le Poul N, Planchat A, Pellegrin Y, Blart E, Jacquemin D, Odobel F. Synthesis, photovoltaic performances and TD-DFT modeling of push-pull diacetylide platinum complexes in TiO2 based dye-sensitized solar cells. Dalton Trans 2014; 43:11233-42. [PMID: 24837848 DOI: 10.1039/c4dt00301b] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this joint experimental-theoretical work, we present the synthesis and optical and electrochemical characterization of five new bis-acetylide platinum complex dyes end capped with diphenylpyranylidene moieties, as well as their performances in dye-sensitized solar cells (DSCs). Theoretical calculations relying on Time-Dependent Density Functional Theory (TD-DFT) and a range-separated hybrid show a very good match with experimental data and allow us to quantify the charge-transfer character of each compound. The photoconversion efficiency obtained reaches 4.7% for 8e (see TOC Graphic) with the tri-thiophene segment, which is among the highest efficiencies reported for platinum complexes in DSCs.
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Affiliation(s)
- Sébastien Gauthier
- Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, IUT de Lannion, rue Edouard Branly, BP 30219, F22302 Lannion Cedex, France.
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