4 results on '"Nierengarten, I."'
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2. Synthesis of giant globular multivalent glycofullerenes as potent inhibitors in a model of Ebola virus infection
- Author
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Muñoz A., Sigwalt D., Illescas B.M., Luczkowiak J., Rodríguez-Pérez L., Nierengarten I., Holler M., Remy J.-S., Buffet K., Vincent S.P., Rojo J., Delgado R., Nierengarten J.-F., Martín N. and Financial support by the European Research Council (ERC-2012-ADG_320441 (Chirallcarbon), ITN-2008-213592 (CARMUSYS)), Ministerio de Economía y Competitividad (MINECO) of Spain (projects CTQ2014-52045-R, CTQ2011-23410 and CTQ2012-31914), the Comunidad Autónoma de Madrid (PHOTOCARBON project S2013/MIT-2841), Instituto de Salud Carlos III (ISCIII) (FIS PI1101580 and FIS1400708), the Agence National de la Recherche (ANR, Programme Blanc 2011), the International Center for Frontier Research in Chemistry and LabEx ‘Chimie des Systèmes Complexes’ is acknowledged. N.M. thanks the Alexander von Humboldt Foundation. S.P.V. and K.B. thank FNRS (FRIA fellowship).
- Published
- 2016
3. Dendritic‐Like Molecules Built on a Pillar[5]arene Core as Hole Transporting Materials for Perovskite Solar Cells
- Author
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Wakana Matsuda, Andrea Cabrera-Espinoza, Iwona Nierengarten, Gianna Reginato, Hans Köbler, Shu Seki, Jorge Pascual, Ottavia Bettucci, Antonio Abate, Silvia Collavini, Sebastian F. Völker, Juan Luis Delgado, Jean-François Nierengarten, Silver-Hamill Turren-Cruz, Bettucci, O., Pascual, J., Turren-Cruz, S. -H., Cabrera-Espinoza, A., Matsuda, W., Volker, S. F., Kobler, H., Nierengarten, I., Reginato, G., Collavini, S., Seki, S., Nierengarten, J. -F., Abate, A., Delgado, J. L., Bettucci, O, Pascual, J, Turren-Cruz, S, Cabrera-Espinoza, A, Matsuda, W, Völker, S, Köbler, H, Nierengarten, I, Reginato, G, Collavini, S, Seki, S, Nierengarten, J, Abate, A, and Delgado, J
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010405 organic chemistry ,Chemistry ,business.industry ,Organic Chemistry ,Pillar ,Perovskite solar cell ,General Chemistry ,010402 general chemistry ,perovskite solar cell ,01 natural sciences ,Engineering physics ,triarylamine ,Catalysis ,0104 chemical sciences ,hole transporting material ,perovskite solar cells ,photovoltaics ,pillar[5]arene ,Core (optical fiber) ,photovoltaic ,Photovoltaics ,CHIM/06 - CHIMICA ORGANICA ,business ,Perovskite (structure) - Abstract
Multi-branched molecules have recently demonstrated interesting behaviour as charge-transporting materials within the fields of perovskite solar cells (PSCs). For this reason, extended triarylamine dendrons have been grafted onto a pillar[5]arene core to generate dendrimer-like compounds, which have been used as hole-transporting materials (HTMs) for PSCs. The performances of the solar cells containing these novel compounds have been extensively investigated. Interestingly, a positive dendritic effect has been evidenced as the hole transporting properties are improved when going from the first to the second-generation compound. The stability of the devices based on the best performing pillar[5]arene material has been also evaluated in a high-throughput ageing setup for 500 h at high temperature. When compared to reference devices prepared from spiro-OMeTAD, the behaviour is similar. An analysis of the economic advantages arising from the use of the pillar[5]arene-based material revealed however that our pillar[5]arene-based material is cheaper than the reference.
- Published
- 2021
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4. Heteroleptic Copper(I) Complexes Prepared from Phenanthroline and Bis-Phosphine Ligands: Rationalization of the Photophysical and Electrochemical Properties
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John Mohanraj, Meera Mohankumar, Iwona Nierengarten, Michel Holler, Béatrice Delavaux-Nicot, Alix Sournia-Saquet, Jean-François Nierengarten, Nicola Armaroli, Filippo Monti, Enrico Leoni, Leoni, E., Mohanraj, J., Holler, M., Mohankumar, M., Nierengarten, I., Monti, F., Sournia-Saquet, A., Delavaux-Nicot, B., Jean-Francois, Nierengarten, Armaroli, N., Leoni, Enrico, Mohanraj, John, Holler, Michel, Mohankumar, Meera, Nierengarten, Iwona, Monti, Filippo, Sournia-Saquet, Alix, Delavaux-Nicot, Béatrice, Jean-Francois Nierengarten, null, Armaroli, Nicola, Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR), Consiglio Nazionale delle Ricerche (CNR), Laboratoire de chimie moléculaire (LCM), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
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Cu(I) complexes ,Luminescence ,Absorption spectroscopy ,010405 organic chemistry ,Phenanthroline ,Excited states ,chemistry.chemical_element ,Ether ,Crystal structure ,010402 general chemistry ,Electrochemistry ,01 natural sciences ,Medicinal chemistry ,Copper ,0104 chemical sciences ,3. Good health ,Inorganic Chemistry ,chemistry.chemical_compound ,chemistry ,Density functional theory ,[CHIM.COOR]Chemical Sciences/Coordination chemistry ,Physical and Theoretical Chemistry ,Phosphine - Abstract
The electronic and structural properties of ten heteroleptic [Cu(NN)(PP)]+ complexes have been investigated. NN indicates 1,10-phenanthroline (phen) or 4,7-diphenyl-1,10-phenanthroline (Bphen); each of these ligands is combined with five PP bis-phosphine chelators, i.e., bis(diphenylphosphino)methane (dppm), 1,2-bis(diphenylphosphino)ethane (dppe), 1,3-bis(diphenylphosphino)propane (dppp), 1,2-bis(diphenylphosphino)benzene (dppb), and bis[(2-diphenylphosphino)phenyl] ether (POP). All complexes are mononuclear, apart from those based on dppm, which are dinuclear. Experimental data - also taken from the literature and including electrochemical properties, X-ray crystal structures, UV-vis absorption spectra in CH2Cl2, luminescence spectra and lifetimes in solution, in PMMA, and as powders - have been rationalized with the support of density functional theory calculations. Temperature dependent studies (78-358 K) have been performed for selected complexes to assess thermally activated delayed fluorescence. The main findings are (i) dependence of the ground-state geometry on the crystallization conditions, with the same complex often yielding different crystal structures; (ii) simple model compounds with imposed C2v symmetry ([Cu(phen)(PX3)2]+ X = H or CH3) are capable of modeling structural parameters as a function of the P-Cu-P bite angle, which plays a key role in dictating the overall structure of [Cu(NN)(PP)]+ complexes; (iii) as the P-Cu-P angle increases, the energy of the metal-to-ligand charge transfer absorption bands linearly increases; (iv) the former correlation does not hold for emission spectra, which are red-shifted for the weaker luminophores; (v) the larger the number of intramolecular π-interactions within the complex in the ground state, the higher the luminescence quantum yield, underpinning a geometry locking effect that limits the structural flattening of the excited state. This work provides a general framework to rationalize the structure-property relationships of [Cu(NN)(PP)]+, a class of compounds of increasing relevance for electroluminescent devices, photoredox catalysis, and solar-to-fuels conversion, which so far have been investigated in an unsystematic fashion, eluding a comprehensive understanding. © Copyright 2018 American Chemical Society.
- Published
- 2018
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