A5009765046- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Porphyrin and Phthalocyanine Chemistry
- Supramolecular Chemistry and Complexes
- Crystallography and molecular interactions
- Luminescence and Fluorescent Materials
- Photochromic and Fluorescence Chemistry
- Molecular Junctions and Nanostructures
- Molecular Sensors and Ion Detection
- Magnetism in coordination complexes
- Surface Chemistry and Catalysis
- Lanthanide and Transition Metal Complexes
- Synthesis and Properties of Aromatic Compounds
- Metal complexes synthesis and properties
- Advanced NMR Techniques and Applications
- Photochemistry and Electron Transfer Studies
- Synthesis and Biological Evaluation
- Surface and Thin Film Phenomena
- Synthesis and Characterization of Heterocyclic Compounds
- Graphene research and applications
- Bioactive Compounds and Antitumor Agents
- Organic Chemistry Cycloaddition Reactions
- Quantum and electron transport phenomena
- Advanced Chemical Physics Studies
- Metal-Organic Frameworks: Synthesis and Applications
Centre National de la Recherche Scientifique
2016-2025
Aix-Marseille Université
2016-2025
Centre Interdisciplinaire de Nanoscience de Marseille
2016-2025
Czech Academy of Sciences
2024
Palacký University Olomouc
2024
Regional Centre of Advanced Technologies and Materials
2024
Robert Bosch (Germany)
2023
Canadian Nautical Research Society
2018-2020
Délégation Provence et Corse
2016-2020
Nantes Université
2013-2019
Efficient enzyme immobilization is crucial for the successful commercialization of large-scale enzymatic water treatment. However, issues such as lack high loading coupled with leaching present challenges widespread adoption immobilized systems. The study describes development and bioremediation application an biocomposite employing a cationic macrocycle-based covalent organic framework (COF) hierarchical porosity horseradish peroxidase (HRP). intrinsic porous features azacalix[4]arene-based...
The zwitterionic N,N'-dialkyl-2-amino-5-alcoholate-1,4-benzoquinonemonoiminium derivatives [C6H2(NHCH2CH2X)2(O)2] (X = NMe2, 9; X NHEt, 10; OMe, 11), previously prepared from 4,6-diaminoresorcinol by a transamination reaction, and 12 N(CH2CH2)2O) behave as tridentate ligands when reacted with [Ni(acac)2] to form the corresponding octahedral Ni(II) 2:1 complexes (13−16), respectively. In contrast, ligand 9 | NiCl2·6H2O in tandemlike manner afford stabilized organometalate 1:1 complex (17)....
Azacalix[n]arenes (ACAs) are lesser-known cousins of calix[n]arenes that contain amine bridges instead methylene bridges, so they generally have higher flexibility due to enlarged cavities. Herein, we report a highly substituted cationic azacalix[4]arene-based covalent organic framework (ACA-COF) synthesized by the Zincke reaction under microwave irradiation. The current work is rare example synthetic strategy utilizes chemical functionalization an macrocycle constrain its conformational...
A straightforward synthesis of the zwitterionic benzoquinonemonoimine 8 is reported. This molecule a rare example zwitterion being more stable than its canonical forms. It shown that best described as constituted two chemically connected but electronically not conjugated 6 pi electron subunits. Its reactivity with electrophiles such H(+), CH(3)(+), and metal salts leads to new 12 molecules (H(+)), 14 (CH(3)(+)), 20 (Pd(2+)), respectively, in which one or both subsystems localize into an...
A near-infrared-absorbing heptamethine (HM+ ) incorporating three bulky benzo[cd]indole heterocycles was designed to efficiently prevent self-aggregation of the dye, which results in a strong enhancement its photoinitiating reactivity as compared parent bis-benzo[cd]indole (HMCl+ used reference system. In this context, we highlight an efficient free-radical NIR-polymerization up 100 % acrylates C=C bonds conversion even under air conditions. Such important initiating performance obtained by...
We present a novel family of "potentially antiaromatic" alkyl-substituted p-benzoquinonediimine pH-dependent chromophores. It appears from the structural data that these overall 12 pi-electron molecules should be better considered as constituted by two chemically connected but electronically not conjugated 6 subunits. Molecule 5 to first example separated, conjugated, and localized systems can tuned reversible protonation become delocalized. The mono- diprotonated derivatives have been...
The first 12 pi-electron zwitterionic structure in quinonoid chemistry is described with the N,N,O,O-molecule 6 which positive charge pi-delocalized between nitrogen atoms and negative oxygen atoms; depending on crystallization solvent, a 1D-tape-like H-bonded network can be generated solid-state.
Syntheses of nanometer scale, directly beta-fused oligoporphyrins sharing an extended π-system are described.
Dinuclear, divalent acetylacetonato (acac) complexes of the type [M(acac){μ-C6H2(NR)4}M(acac)] (M = Ni, Pd) have been prepared by reaction corresponding bis(acac) metal precursor with 2,5-diamino-1,4-benzoquinonediimines C6H2(NHR)2(NR)2 (4a, R CH2-t-Bu; 4b, CH2Ph; 4c, Ph), which are metalated and become bridging ligands, also like in complex [(C8H11)Pt{μ-C6H2(NCH2-t-Bu)4}Pt(C8H11)] (6) obtained 4a [PtCl2(COD)]. The were fully characterized, including X-ray diffraction for...
We describe a versatile and very efficient synthesis of previously unknown substituted 5,14-dihydro-5,7,12,14-tetraazapentacenes (DHTAPs). A structural study by NMR spectroscopy showed that the conjugated pi-system pentacyclic skeleton rearranges depending on electronic effect substituent(s).
A novel sulfonamide-conjugated benzo-[2,1-b:3,4-b']bithiophene semiconductor has been designed and synthetized in order to develop a probe for specific detection of anions both the homogeneous (solution) heterogeneous phase. Its photophysical electrochemical data were reported this study. On basis optical NMR titrations analysis, chelator was found be highly selective fluoride compared others (Ka = 1.6 × 10(4) M(-1) dimethyl sulfoxide (DMSO)). In addition, from an intricate sample, shows...
Abstract Recently π–d conjugated coordination polymers have received a lot of attention owing to their unique material properties, although synthesis long and defect‐free remains challenging. Herein we introduce novel on‐surface with quinoidal ligands under ultra‐high vacuum conditions, which enables formation flexible lengths up hundreds nanometers. Moreover, this procedure allows the incorporation different transition‐metal atoms four‐ or two‐fold coordination. Remarkably, mode revealed...
On-surface synthesis under ultra-high vacuum (UHV) conditions facilitates the fabrication of unique molecular compounds, replicating established in-solution protocols.
Two compact far-red cationic benzoquinone diimine dyes were synthesized, having molecular weights lower than 400 or 300 Da and featuring light absorption properties centered around 700 nm.
Efflux-mediated antibiotic resistance poses a significant global threat, affecting diverse bacterial species. Clinicians recognize the danger of efflux mechanisms during treatment, yet precise diagnostic tools remain unavailable. The antibiogram currently infers abnormal pump activity in clinical isolates, which is subsequently confirmed through transcriptomic or genomic analysis. This study harnesses colorimetric, fluorescence, and solubility properties phenazinium derivatives to develop...
Protoporphyrin IX (PpIX) is used as a photosensitizing agent in photodynamic detection and therapy (PDT) of cancer synthesized intracellularly from aminolevulinic acid (ALA) precursors. To evaluate means to specifically target ALA derivatives defined cells, we have characterized ethylene glycol esters amino pseudodipeptide potential specific substrates for cellular esterases aminopeptidases, respectively. The PpIX formation induced by these products was investigated using cultures human rat...
A new and very efficient one-pot synthesis, in water, of 6 pi + electron zwitterionic benzoquinonemonoimines involves the first examples transamination reactions quinonoid chemistry allows introduction functionalities to, fine-tuning properties of, a large family molecules with interesting potential, both supramolecular as multidentate ligands coordination chemistry.
Full details on a very efficient transamination reaction for the synthesis of zwitterionic N,N-dialkyl-2-amino-5-alcoholate-1,4-benzoquinonemonoiminium derivatives [C6H2(=NHR)2(=O)2] 5-16 are reported. The molecular structures zwitterions 5 (R=CH3) in 5.H2O, 13 (R=CH2CH2OMe), 15 (R=CH2CH2NMe2), and parent, unsubstituted system [C6H2(=NH2)2(=O)2] 4 4.H2O have been established by single-crystal X-ray diffraction. This one-pot preparation can be carried out water, MeOH, or EtOH allows access to...
When a 2,5-diamino-1,4-benzoquinonediimine C6H2(=NR)2(NHR)2 (2) is used as bridging ligand, new dinickel(II) complexes [(acac)Ni[mu-C6H2(=NPh)4]Ni(acac)] (3a: R=Ph) and [(acac)Ni[mu-C6H2(=NCH2tBu)4]Ni(acac)] (3b: R=CH2tBu) are obtained; upon one-electron oxidation of these delocalized mixed-valence compounds formed. An X-ray diffraction study on 3b reveals equalization the bond lengths within each ligand 6 systems lack conjugation between them. The oxidized state in 3b+ involves both...
Temperature-controlled reactivity places Bandrowski's base 3 at the crossroads of a new versatile strategy for preparation two different categories chromophores. We describe access to class quinonediimines (8) with an extended pi-conjugation owing presence imine functions. Under slightly conditions, appears be precursor choice in novel pH- and light-dependent binary molecular switch. This molecule (11) is constituted benzobis(imidazole) core that can reversibly protonated diarylethene unit...
Precise control of multiple spin states on the atomic scale presents a promising avenue for designing and realizing magnetic switches. Despite substantial progress in recent decades, challenge achieving over multiconfigurational reversible switches low-dimensional nanostructures persists. Our work demonstrates multiple, fully plasmon-driven spin-crossover single π-d metal–organic chain suspended between two electrodes. The plasmonic nanocavity stimulated by external visible light allows...