A5057590501- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Lanthanide and Transition Metal Complexes
- Organic Light-Emitting Diodes Research
- Magnetism in coordination complexes
- Metal complexes synthesis and properties
- Advanced Photocatalysis Techniques
- Organometallic Complex Synthesis and Catalysis
- Crystallography and molecular interactions
- TiO2 Photocatalysis and Solar Cells
- Conducting polymers and applications
- Perovskite Materials and Applications
- Luminescence Properties of Advanced Materials
- Photochemistry and Electron Transfer Studies
- Organic Electronics and Photovoltaics
- Coordination Chemistry and Organometallics
- 2D Materials and Applications
- Supramolecular Chemistry and Complexes
- Catalytic Cross-Coupling Reactions
- SARS-CoV-2 detection and testing
- COVID-19 diagnosis using AI
- Pickering emulsions and particle stabilization
- Asymmetric Synthesis and Catalysis
- Organic and Molecular Conductors Research
- Transition Metal Oxide Nanomaterials
Université Mohammed VI Polytechnique
2021-2024
Laboratoire de Chimie de Coordination
2006-2017
Imperial College London
2016
Bangor University
2014-2015
Centre National de la Recherche Scientifique
2006-2014
Université de Strasbourg
2009-2014
Université de Toulouse
2012-2014
Institut National Polytechnique de Toulouse
2013-2014
Université Toulouse III - Paul Sabatier
2007-2014
Laboratoire de Chimie Moléculaire
2012-2013
Highly luminescent CuI complexes with one phenanthroline and (bis[2-(diphenylphosphino)phenyl]ether) ligand show an emission quantum yield of up to 28 % upon deactivation the metal-to-ligand charge-transfer excited states; their X-ray crystal structure shows a distorted tetrahedral geometry (see figure inside cover). One these compounds is used as active material in light-emitting electrochemical cell; it exhibits efficiency similar that RuII-type complexes.
Preparation of [Cu(NN)(PP)]+ derivatives has been systematically investigated starting from two libraries phenanthroline (NN) and bis-phosphine (PP) ligands, namely, (A) 1,10-phenanthroline (phen), neocuproine (2,9-dimethyl-1,10-phenanthroline, dmp), bathophenanthroline (4,7-diphenyl-1,10-phenanthroline, Bphen), 2,9-diphenethyl-1,10-phenanthroline (dpep), 2,9-diphenyl-1,10-phenanthroline (dpp); (B) bis(diphenylphosphino)methane (dppm), 1,2-bis(diphenylphosphino)ethane (dppe),...
We have prepared complexes of formula [Eu(β-diketonate)3(DPEPO)] and shown quantitative excited-state energy transfer from the ligands combined with efficient Ln luminescence leading to exceptionally-high total photoluminescence quantum yield up 80% in solution PMMA.
Homo- and heteroleptic copper(I) complexes obtained from various chelating bis-phosphine ligands Cu(CH3CN)4BF4 have been used for the preparation of light emitting devices.
The effects of excitation wavelength on the optical properties (emission spectrum and quantum yield) a luminescent solar concentrator (LSC) containing fluorescent organic dye (Lumogen F Rot 305) are studied. Excitation at wavelengths long-wavelength edge absorption results in redshifted emission, but yield remains constant 100%. origin this effect its consequences discussed. extent tail is determined importance reabsorption losses shown. efficiencies photon transport probabilities LSCs...
The synthesis and subsequent spectroscopic, electrochemical, photophysical computational characterisation of a series heteroleptic Cu(I) complexes general formula: [CuPOP{4,4'(R)-bipyridyl}][BF(4)] [CuPOP{4,4',6,6'(R)-bipyridyl}][BF(4)] is described (POP = bis{2-(diphenylphosphanyl)phenyl} ether; R Me, CO(2)H, CO(2)Et. steric constraint imposed by the POP ligand can impede distortion towards square planar geometry upon MLCT excitation or oxidation this explored in context varying...
Abstract A series of homoleptic copper(I), silver(I), and gold(I) complexes two bisphosphine ligands {1,2‐bis(diphenylphosphino)benzene, dppb; bis[2‐(diphenylphosphino)phenyl]ether, POP} have been prepared. Whilst all three [M(dppb) 2 ]BF 4 are tetracoordinate, this geometry is found only for the silver(I) complex with POP. Instead, [Cu(POP) ] + [Au(POP) adopt a trigonal coordination an uncoordinated phosphorus atom. close inspection P–M bond lengths reveals interesting trend. From copper to...
The coronavirus pandemic, which appeared in Wuhan, China, December 2019, rapidly spread all over the world only a few weeks. Faster testing techniques requiring less resources are key managing either to enable larger scale or even just provide developing countries with limited resources, particularly Africa, means perform tests manage crisis. Here, we report an unprecedented, rapid, reagent-free and easy-to-use screening spectroscopic method for detection of SARS-CoV-2 on RNA extracts. This...
We have fabricated Dye Sensitised Solar Cells (DSSCs) using only water as the solvent and guanidinium iodide–iodine redox couple that operate at 4% energy efficiency under 1-sun illumination. This result is ∼5 times higher than best previously reported values. show it critical to facilitate wetting of electrolytes into mesoporous TiO2 dye films, especially when hydrophobic dyes. chenodeoxycholic acid be a good surfactant for this purpose. By separate variation iodide iodine concentrations in...
Heteroleptic copper(I) complexes CuPOP-F and CuFc-F have been prepared from a fullerene-substituted phenanthroline ligand bis[2-(diphenylphosphino)phenyl] ether (POP) 1,1′-bis(diphenylphosphino)ferrocene (dppFc), respectively. Electrochemical studies indicate that some ground-state electronic interaction between the fullerene subunit metal-complexed moiety are present in both CuFc-F. Their photophysical properties investigated by steady state time-resolved UV−vis−NIR luminescence...
Synthesis and photophysical characterisation of [Ln(hfac)3DPEPO] complexes (with Ln = Eu, Tb, Yb, Nd, Gd) has been carried out to investigate the factors responsible for variation in total photoluminescence quantum yield within this family emissive lanthanide complexes. Electronic absorption emission spectroscopy, conjunction with DFT calculations excited state Eu complex, elucidate role each ligand sensitisation through antenna effect. The X-ray crystal structure [Gd(hfac)3DPEPO] determined...
Abstract In this paper, we describe the synthesis and electronic properties of a series [Cu(NN) 2 ] + systems. The NN ligands investigated are 2,9‐bis[( tert ‐butyldimethylsilyloxy)methyl]‐1,10‐phenanthroline ( 1 ), 2,9‐bis[(triisopropylsilyloxy)methyl]‐1,10‐phenanthroline ‐butyldiphenylsilylmoxy)ethyl]‐1,10‐phenanthroline 3 2,9‐bis[2,6‐bis(benzyloxy)phenethyl]‐1,10‐phenanthroline 4 ) 2‐(1,3‐diphenylpropan‐2‐yl)‐9‐phenethyl‐1,10‐phenanthroline 5 ). electrochemical ground state absorption...
Treatment of 2-diphenylphosphino-6-methylpyridine (dpPyMe) with Cu(CH3CN)4BF4 afforded the stable dinuclear Cu(I) complex [Cu2(μ-dpPyMe)3(CH3CN)](BF4)2. This compound is a weak emitter in solution, however remarkably high emission quantum yield (46%) has been found rigid matrix at room temperature.
A heteroleptic silver(<sc>i</sc>) complex has been prepared, characterized and selected for the first time as an active material light-emitting electrochemical (LEC) devices. Its electronic properties, DFT device performances have systematically investigated.
Abstract In this work, five phenanthroline derivatives substituted with different methyl groups have been selected to synthesize β‐diketonate‐based europium complexes check the influence of substitutions on degradation effect those in poly(methyl methacrylate) (PMMA) films. The photophysical properties Eu(III) complexes, including absorbance, excitation, and emission carefully investigated solution, solid‐state, doped PMMA film. all these states, exhibit an impressive red at 614 nm a high...
The material Ag(POP)(Bphen)](BF<sub>4</sub>) was used as luminescent down-shifter (LDS). LDS serves two purposes. Firstly it improves the photocurrent of OPV. Secondly, layer reduces effect UV, leading to enhanced lifetime.
Abstract The intermediate resulting from the addition of an organolithium reagent to 1,10‐phenanthroline has been quenched with benzyl bromide. protected dihydrophenanthroline is thus stabilized and can be used for further chemical transformations. This strategy allows modify reactivity phenanthroline backbone offers a unique opportunity perform modifications that would not possible when starting 1,10‐phenanthroline. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
With simpler manufacturing processes and production costs lower than by one‐fifth of those for silicon solar cells, dye‐sensitized cells (DSSCs) are among the most promising technologies third‐generation possessing capability producing electricity under cloudy conditions low or artificial light in comparison to other technologies. Although large‐scale commercialization DSSCs is inhibited their power conversion efficiency. To boost efficiency, several approaches have been implemented,...
The performance of a flexible and glass dye-sensitized solar cell (DSSC) with water-based electrolyte solutions is described. High concentrations alkylamidazoliums were used to overcome the deleterious effect water and, based on this variable, pure DSSCs tested displaying highest recorded efficiency so far 3.45% 6% for cells, respectively, under simulated air mass 1.5 spectrum illumination at 100 mWcm −2 . An improvement in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"...