Search results for " pyrene"
showing 10 items of 13 documents
Kinematics, deformation partitioning and late Variscan magmatism in the Agly massif, Eastern Pyrenees, France
2020
International audience; In order to constrain the finite deformation pattern of the Variscan basement of the Agly massif, a detailed structural analysis over the whole Agly massif was performed. Our investigation combined geological mapping, reappraisal of published and unpublished data completed with our own structural work. Results are provided in the form of new tectonic maps and series of regional cross-sections through the Agly massif. At variance from previous studies, we identified three deformation fabrics named D1, D2 and D3. The D1 deformation is only relictual and characterized by a broadly northwest-southeast striking and eastward dipping foliation without any clear mineral and …
Alkyloxy modified pyrene fluorophores with tunable photophysical and crystalline properties
2019
Novel alkyloxy modified 2,7-di-tert-butyl-4,5,9,10-tetra(arylethynyl)pyrenes were prepared through a straightforward Sonogashira coupling approach. Optical properties such as quantum yields and absorption/emission spectra of the fluorophores were investigated by UV/Vis and fluorescence measurements. Aggregation induced excimer formation of the chromophores in polar solvents and in the solid state was proved by the presence of a characteristic bathochromically shifted emission band and a decrease of the emission capability. These results strongly indicate the unexpected observation that the excimer formation of adjacent pyrene rings is not prevented by the introduction of bulky tert-butyl su…
Thiophene pyrenyl derivatives for the supramolecular processability of single-walled carbon nanotubes in thin film heterojunction
2017
Abstract A major problem for the use of single-wall carbon nanotubes (SWCNTs) in electronic devices relates to their poor processability. Chemical modification inevitably introduces defects in the nanotube lattice, resulting in a loss of electronic properties. In this contest, we report on a supramolecular approach with the aim of increasing the dispersion of SWCNTs in solution and in organic semiconductor matrices by ensuring the optoelectronic properties. In particular, new pyrenyl derivatives of thiophene have been synthesized and used to improve the solubility of SWCNTs for electron transfer in thin film heterojunction with poly(3-hexylthiophene) (P3HT) as donor system. Photoinduced ele…
CCDC 783767: Experimental Crystal Structure Determination
2011
Related Article: V.Blanco, M.D.Garcia, A.Terenzi, E.Pia, A.Fernandez-Mato, C.Peinador, J.M.Quintela|2010|Chem.-Eur.J.|16|12373|doi:10.1002/chem.201002051
CCDC 1965274: Experimental Crystal Structure Determination
2020
Related Article: Manuel Meneses-Sánchez, Lucía Piñeiro-López, Teresa Delgado, Carlos Bartual-Murgui, M. Carmen Muñoz, Pradip Chakraborty, José Antonio Real|2020|J.Mater.Chem.C|8|1623|doi:10.1039/C9TC06422B
CCDC 1965275: Experimental Crystal Structure Determination
2020
Related Article: Manuel Meneses-Sánchez, Lucía Piñeiro-López, Teresa Delgado, Carlos Bartual-Murgui, M. Carmen Muñoz, Pradip Chakraborty, José Antonio Real|2020|J.Mater.Chem.C|8|1623|doi:10.1039/C9TC06422B
CCDC 1965273: Experimental Crystal Structure Determination
2020
Related Article: Manuel Meneses-Sánchez, Lucía Piñeiro-López, Teresa Delgado, Carlos Bartual-Murgui, M. Carmen Muñoz, Pradip Chakraborty, José Antonio Real|2020|J.Mater.Chem.C|8|1623|doi:10.1039/C9TC06422B
CCDC 1532006: Experimental Crystal Structure Determination
2017
Related Article: P. J. Llabres-Campaner, J. Pitarch-Jarque, R. Ballesteros-Garrido, B. Abarca, R. Ballesteros, E. García-España|2017|Dalton Trans.|46|7397|doi:10.1039/C7DT00855D
Mechanisms involved in lipid accumulation and apoptosis induced by 1-nitropyrene in Hepa1c1c7 cells
2011
International audience; 1-Nitropyrene (1-NP) is a nitro-polycyclic aromatic hydrocarbon (nitro-PAH) present in diesel exhaust and bound to particular matter in urban air. We show that 1-NP and the referent PAH benzo(a)pyrene (BP) induce apoptosis and a lipid accumulation dependent on cytochrome P450 1A1-metabolites in mouse hepatoma cells, whereas 1-amino-pyrene had no effect. The caspase inhibitor, N-benzyloxycarbonyl-Val-Ala-Asp(O-Me) fluoromethyl ketone (Z-VAD-fmk), inhibits 1-NP-induced apoptosis, but failed to alter 1-NP-triggered lipid accumulation determined by Nile red staining. We further show that cholesterol and fatty acid contents are modified after nitro-PAH exposure and that 1…