A5011452544- Luminescence and Fluorescent Materials
- Molecular Sensors and Ion Detection
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Supramolecular Chemistry and Complexes
- Porphyrin and Phthalocyanine Chemistry
- Molecular Junctions and Nanostructures
- Advanced biosensing and bioanalysis techniques
- Photochromic and Fluorescence Chemistry
- Photoreceptor and optogenetics research
- Supramolecular Self-Assembly in Materials
- Chemical Synthesis and Analysis
- Lanthanide and Transition Metal Complexes
- Radical Photochemical Reactions
- Click Chemistry and Applications
- Organic Light-Emitting Diodes Research
- Crystallography and molecular interactions
- Fluorine in Organic Chemistry
- Magnetism in coordination complexes
- Analytical Chemistry and Sensors
- Synthesis and Properties of Aromatic Compounds
- Nanoplatforms for cancer theranostics
- CO2 Reduction Techniques and Catalysts
- Polyoxometalates: Synthesis and Applications
- Nanocluster Synthesis and Applications
Institut des Sciences Moléculaires
2015-2024
Université de Bordeaux
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Institut Polytechnique de Bordeaux
2016-2024
Canadian Nautical Research Society
2015-2021
École Nationale Supérieure de Chimie, de Biologie et de Physique
2016
Université Grenoble Alpes
2014-2015
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2014-2015
Institut de Recherches en Technologies et Sciences pour le Vivant
2014-2015
Laboratoire de Chimie et Biologie des Métaux
2014-2015
Abstract Currently available approaches to molecular‐scale logic gates are summarized and compared. These include: chemically‐controlled fluorescent transmittance‐based switches concerned with small molecules, DNA oligonucleotides fluorescence readout, oligonucleotide reactions DNA‐based catalysts, chemically‐gated photochromics, reversibly denaturable proteins, molecular machines optical electronic signals, two‐photon fluorophores multichromophoric transient switches. The photochemical...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTProof-of-Principle of Molecular-Scale ArithmeticA. Prasanna de Silva and Nathan D. McClenaghanView Author Information School Chemistry, Queen's University Belfast BT9 5AG, Northern Ireland Cite this: J. Am. Chem. Soc. 2000, 122, 16, 3965–3966Publication Date (Web):April 7, 2000Publication History Received22 November 1999Revised22 February 2000Published online7 April inissue 1...
Integrated "ICT chromophore-receptor" systems show ion-induced shifts in their electronic absorption spectra. The wavelength of observation can be used to reversibly configure the system any four logic operations permissible with a single input (YES, NOT, PASS 1, 0), under conditions ion and transmittance output. We demonstrate these dyes integrated into Tsien's calcium receptor, 1-2. Applying multiple inputs 1-2 also allows us perform two- or three-input OR NOR operations. weak fluorescence...
Three new luminescent and redox-active Ru(II) complexes containing novel dendritic polypyridine ligands have been synthesized, their absorption spectra, luminescence properties (both at room temperature in fluid solution 77 K rigid matrix), redox behavior investigated. The are made of 1,10-phenanthroline coordinating subunits carbazole groups as branching sites. first second generation species this class (L1 L2, respectively; see Figure 1 for structural formulas) prepared employed. metal...
Abstract Organic donor–acceptor–donor (D–A–D) polymers or small molecules are widely investigated in organic solar cells due to their broad light absorption, narrow band gap, excellent charge mobility, and exciton seperation at the interface. However, studies of conjugated with D–A–D molecule structures as photocatalytically active materials still rare. In this study, an unprecedented demonstration that photocatalytic activity can fact be affected by tuning D A is given. Especially, EBE...
Straightforward synthetic methodologies are reported for the functionalization of oligothiophenes with hydrogen-bonding motifs. Codeposition from a solution symmetric melamine-terminated electron-donor oligomers complementary barbiturate-labeled electron-acceptor fullerene resulted in homogeneous films. Incorporation into photovoltaic devices gave 2.5-fold enhancement light energy to electrical conversion when compared analogous systems non-hydrogen-bonding parent C(60). [reaction: see text]
BF(2)-Azadipyrromethene dyes are a promising class of NIR emitter (nonhalogenated) and photosensitizer (halogenated). Spectroscopic studies on benchmark example each type, including absorption (one two photon), time-resolved transient (ps-ms) fluorescence, reported. Fast photodynamics reveal that intense nanosecond fluorescence is quenched in brominated analog, giving rise to persistent (21 μs) signature. Kinetics for these changes determined ascribed the efficient population triplet state...
Abstract The light‐triggered, programmable rupture of cell‐sized vesicles is described, with particular emphasis on self‐assembled polymersome capsules. mechanism involves a hypotonic osmotic imbalance created by the accumulation photogenerated species inside lumen, which cannot be compensated owing to low water permeability membrane. This simple and versatile can adapted wealth hydrosoluble molecules, are either able generate reactive oxygen or undergo photocleavage. Ultimately, in...
A series of photoactive triads have been synthesized and investigated in order to elucidate photoinduced electron transfer hole migration mechanism across nanosized, rigid helical foldamers. The are comprised a central oligoamide foldamer bridge with 9, 14, 18, 19, or 34 8-amino-2-quinolinecarboxylic acid repeat units, two chromophores, an N-terminal oligo(para-phenylenevinylene) donor C-terminal perylene bis-imide acceptor. Time-resolved fluorescence transient absorption spectroscopic...
Nanoconjugates composed of CdSe-ZnS core-shell nanocrystals and pyrenyl ligands are shown to exhibit a double photoluminescence. Owing the different response two emission signals towards oxygen, function as high dynamic range ratiometric luminescent O(2) nanosensors.
In our research program aiming to develop new ruthenium-based polypyridine catalysts for oxidation we were interested in combining a photosensitizer and catalytic fragment within the same complex achieve light-driven oxidation. To respond lack of such conjugates, report here system capable using light activate water molecules order perform selective sulfide oxygenation into sulfoxide via an oxygen atom transfer from H(2)O substrate with TON up 197 ± 6. On basis electrochemical photophysical...
Using the photoreducible Cu<sup>II</sup> precatalyst <bold>2</bold>, trifluoromethylation of terminal alkenes can be conducted at low copper loading on exposing reaction mixture to sunlight/ambient light.
A cyclometalated iridium complex is reported where the core comprises naphthylpyridine as main ligand and ancillary 2,2′-bipyridine attached to a pyrene unit by short alkyl bridge. To obtain with satisfactory purity, it was necessary modify standard synthesis (direct reaction of chloro-bridged dimer) method harnessing an intermediate tetramethylheptanolate-based complex, which subjected acid-promoted removal subsequent complexation. The photophysical behavior bichromophoric model without...
Abstract Iodoperfluooralkylation of terminal alkenes and alkynes is effectively photo‐promoted by benzophenone 2 (BP) or the photoreducible copper(II) complex 1 . In particular, BP at mol% in methanol upon 365 nm irradiation with a low‐pressure mercury lamp (type TLC=thin layer chromatography, 6 W) results fast reaction excellent yields. Complex exhibited very similar reactivity, suggesting that reactions involving are likely to be governed photoactivation processes, rather than...
The supramolecular systems [Ru(Pyr(n)bpy)(CN)(4)](2-) (n = 1, 2), where one and two pyrenyl units are linked via two-methylene bridges to the [Ru(bpy)(CN)(4)](2-) chromophore, have been synthesized. photophysical properties of these systems, which contain a highly solvatochromic metal complex moiety, investigated in water, methanol, acetonitrile. In all solvents, prompt efficient singlet-singlet energy transfer takes places from pyrene inorganic moiety. Energy at triplet level, on other...
Several logic gates and switches can be accessed from two different combinations of a single set fluorophore, receptor spacer components.
Fast reversible energy transfer and intersystem crossing conspire to permit excited-state equilibration between three excited states in a copper(I) phenanthroline complex. Introduction of multiple quasi-isoenergetic planned fashion represents new strategy prolong luminescence lifetimes copper complexes (e.g., 1.2 μs compared with 70 ns for the parent complex).