- New bichromophoric-2,2′-bipyridines: synthesis and optical properties
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The synthesis and characterization of new unsymmetrically substituted bipyridyl-based chromophores featuring π-conjugated donor, acceptor or photoisomerizable backbones are reported. Their absorption and emission properties are discussed in comparison to
- Lohio, Olivier,Viau, Lydie,Maury, Olivier,Bozec, Hubert Le
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- Hydroxy-functionalized bipyridine and tris(bipyridine)metal chromophores: Synthesis and optical properties
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A new family of symmetrically and unsymmetrically-substituted 4,4′-bis[(dialkylamino)styryl]-2,2′-bipyridine ligands, containing 1-4 hydroxy groups on their dialkylamino moieties, have been synthesized. They are readily prepared in good to excellent yields from 4,4′-dimethyl-2,2′-bipyridine and tetrahydropyranyloxy-protected [(hydroxyalkyl)amino]-benzaldehydes. These chromophores display excellent thermal stabilities, with decomposition temperatures of up to 310 °C. The influence of the OH groups on the optical properties (absorption and emission) is discussed. The synthesis of the corresponding heteroleptic and homoleptic tris(bipyridine)-metal(ii) complexes (M2+ = Ru2+, Zn2+), as building blocks for the elaboration of macromolecular NLO-phores, is also described. Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002.
- Bouder, Thomas Le,Viau, Lydie,Guegan, Jean-Paul,Maury, Olivier,Bozec, Hubert Le
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p. 3024 - 3033
(2007/10/03)
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- Synthesis and characterization of 4-alkenyl and 4,4′-dialkenyl-2,2′-bipyridyl ligands bearing π-donor substituents
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The synthesis of a new series of π-donor mono- and disubstituted vinyl bipyridines (donor = 4-R2N-C6H4-; 4-RO-C6H4-; (C5H5)Fe(C5H4-); (C5H5)Ru(C5H4-)) has been achieved by reaction of the mono- and dilithio species of 4,4′-dimethyl-2,2′-bipyridine and the monolithio species of 4-nonyl-4′-methyl-2,2′-bipyridine with the appropriate aldehydes. Their 1H NMR and UV-visible characterizations are reported.
- Bourgault,Renouard,Lognone,Mountassir,Le Bozec
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p. 318 - 325
(2007/10/03)
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- Synthesis and Second-order Nonlinear Optical Properties of New Bipyridyl Metal Complexes
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The synthesis and characterisation of a series of new ?-donor substituted vinyl bipyridines and their rhenium, zinc and mercury complexes ; (η5-C5H5)Fe(η5-C5H4-)> with large nonlinear optical properties are presented; EFISH experiments at 1.34 μm show that complexation leads to a strong enhancement (by a factor of 3 to 9) of the molecular hyperpolarisability β(0).
- Bourgault, M.,Mountassir, C.,Bozec, H. Le,Ledoux, I.,Pucetti, G.,Zyss, J.
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p. 1623 - 1624
(2007/10/02)
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