Optical and electrochemical cations recognition and release from N-azacrown carbazoles

Malval, Jean‐Pierre; Chaimbault, Corinne; Fischer, Birgit; Morand, J.P.; Lapouyade, R.

doi:10.1163/156856701745104

Cited by 20 publications

(12 citation statements)

References 29 publications

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“…[53] Cyclic voltammetry. The cyclic voltammetry experiments [54] (using a computer-controlled Radiometer Voltalab 6 potentiostat with a three-electrode single compartment cell; the working electrode was a platinum disk; a saturated calomel electrode (SCE) used as a reference was placed in a separate compartment with a salt bridge containing the supporting electrolyte) were performed at 300 K, in N 2 -degassed dichloromethane with a constant concentration (0.1 M) of n-Bu 4 BF 4 . Ferrocene (Fc) was used as an internal reference (considering E Fc/Fc+ = 0.53 V in CH 2 Cl 2 vs. aqueous SCE).…”

Section: Methodsmentioning

confidence: 99%

Synthesis, Photophysics and Nonlinear Optical Properties of Stilbenoid Pyrimidine‐Based Dyes Bearing Methylenepyran Donor Groups

et al. 2013

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Arnaud Spangenberg, et al.. Synthesis, photophysics and nonlinear optical properties of stilbenoid pyrimidine-based dyes bearing methylenepyran donor groups.. ChemPhysChem, Wiley-VCH Verlag, 2013, 14 (12), pp.2725-36. 10.1002 Synthesis, Photophysics and Non-linear Optical Properties of Stilbenoid Pyrimidinebased Dyes bearing Methylenepyran Donor GroupsSylvain Achelle,* [a] Jean-Pierre Malval,* [b] Stéphane Aloïse, [c] Alberto Barsella, [d] Arnaud Spangenberg, [b] Loic Mager, [d] Huriye Akdas-Kilig, [e] Jean-Luc Fillaut, [e] Bertrand Caro, [a] and Françoise Robin-le Guen [a] [ AbstractThe nonlinear properties and the photophysical behavior of two π-conjugated chromophores incorporating an electron-deficient pyrimidine core (A) and -methylenepyrans as terminal donor (D) groups have been thoroughly investigated. Both dipolar and quadrupolar branching strategies are explored and rationalized on the basis of the Frenkel exciton model. Even though a cooperative effect is clearly observed when increasing the dimensionality, the NLO response of this series is moderate when considering the nature of the D/A couple and the size of the chromophores (as measured by the number of π electrons). This effect was assigned to a disruption of the electronic conjugation within the dyes scaffold whose geometry deviates from planarity due to a noticeable twisting of the pyranylidene end-groups. This latter structural parameter has also a strong influence on the excited-state dynamics which leads to a very efficient fluorescence quenching.

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Section: Methodsmentioning

confidence: 99%

Synthesis, Photophysics and Nonlinear Optical Properties of Stilbenoid Pyrimidine‐Based Dyes Bearing Methylenepyran Donor Groups

et al. 2013

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“…The cyclic voltammetry experiments [51] (using a computer-controlled Radiometer Voltalab 6 potentiostat with a three-electrode single compartment cell; the working electrode was a platinum disk; a saturated calomel electrode (SCE) used as a reference was placed in a separate compartment with a salt bridge containing the supporting electrolyte) were performed at 300 K, in N 2 -saturated dichloromethane with a constant concentration (0.1 M) of n-Bu 4 NPF 6 (TBAPF 6 ). Ferrocene (Fc) was used as an internal reference.…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

Two‐Photon Initiating Efficiency of a Ditopic Alkoxynitrostilbene Reacting through a Self‐Regenerative Mechanism

et al. 2020

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The photophysical properties and the photoinitiating reactivity of a ditopic alkoxynitrostilbene were compared to those of its single branch chromophore used as a reference. Whereas a trivial additive effect is observed when considering the oneand two-photon absorption properties, a clear and very significant amplification has been highlighted for the photoreactivity of this free radical photoinitiator which was used as a hydrogen abstractor in presence of an aliphatic amine coreactant. We indeed demonstrate that the proximity of two nitroaromatics moieties within the same molecular architecture gives rise to an original cycling mechanism based on a stepwise photo triggering of each photoredox center followed by a subsequent regenerative process. The combination of a high two-photon absorption cross-section (δ 780nm � 330 GM) with a strong enhancement in photoreactivity makes this nitrostilbene bichromophore a very suitable candidate for two-photon polymerization applications.

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“…A detailed description of the setup can be found in ref. 41. The free energy change DG et for an electron transfer between the studied compounds and the amines can be calculated for the classical Rehm-Weller equation 42 (eqn (2)), where E ox , E red , ET, and C are the oxidation potential of the studied compounds, the reduction potential of iodine, the excited (or triplet) state energy of the studied compounds, and the electrostatic interaction energy for the initially formed ion pair, generally considered as negligible in polar solvents:…”

Section: Redox Potentialsmentioning

confidence: 99%

Eosin-mediated synthesis of polymer coatings combining photodynamic inactivation and antimicrobial properties

et al. 2017

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Optical and electrochemical cations recognition and release from N-azacrown carbazoles

Cited by 20 publications

References 29 publications

Synthesis, Photophysics and Nonlinear Optical Properties of Stilbenoid Pyrimidine‐Based Dyes Bearing Methylenepyran Donor Groups

Synthesis, Photophysics and Nonlinear Optical Properties of Stilbenoid Pyrimidine‐Based Dyes Bearing Methylenepyran Donor Groups

Two‐Photon Initiating Efficiency of a Ditopic Alkoxynitrostilbene Reacting through a Self‐Regenerative Mechanism

Eosin-mediated synthesis of polymer coatings combining photodynamic inactivation and antimicrobial properties

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