101
|
Drouet S, Merhi A, Argouarch G, Paul F, Mongin O, Blanchard-Desce M, Paul-Roth CO. Synthesis of new luminescent supramolecular assemblies from fluorenyl porphyrins and polypyridyl isocyanurate-based spacers. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.081] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
102
|
Malti WE, Mongin O, Blanchard-Desce M, Raehm L, Durand JO. Functionalisation of mesoporous silica nanoparticles with 3-isocynatopropyltrichlorosilane. CR CHIM 2011. [DOI: 10.1016/j.crci.2011.09.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
103
|
Parthasarathy V, Fery-Forgues S, Campioli E, Recher G, Terenziani F, Blanchard-Desce M. Dipolar versus octupolar triphenylamine-based fluorescent organic nanoparticles as brilliant one- and two-photon emitters for (bio)imaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:3219-3229. [PMID: 21972222 DOI: 10.1002/smll.201100726] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 06/01/2011] [Indexed: 05/31/2023]
Abstract
Two related triphenylamine-based dipolar and octupolar fluorophores are used to prepare aqueous suspensions of fluorescent organic nanoparticles (FONs) via the reprecipitation method. The obtained spherical nanoparticles (30-40 nm in diameter) are fluorescent in aqueous solution (up to 15% fluorescence quantum yield) and exhibit extremely high one- and two-photon brightness, superior to those obtained for quantum dots. Despite the two chromophores showing similar fluorescence in solution, the fluorescence of FONs made from the octupolar derivative is significantly red-shifted compared to that generated by the dipolar FONs. In addition, the maximum two-photon absorption cross section of the FONs made from the octupolar derivative is 55% larger than that of the dipolar derivative FONs. The experimental observations provide evidence that the different molecular shape (rodlike versus three-branched) and charge distribution (dipolar versus octupolar) of the two chromophores strongly affect the packing inside the nanoparticles as well as their spectroscopic properties and colloidal stability in pure water. The use of these FONs as probes for biphotonic in-vivo imaging is investigated on Xenopus laevis tadpoles to test their utilization for angiography. When using FONs made from the octupolar dye, the formation of microagglomerates (2-5 μm scale) is observed in vivo, with subsequent lethal occlusion of the blood vessels. Conversely, the nanoparticles of the dipolar dye allow acute imaging of blood vessels thanks to their suitable size and brightness, while no toxic effect is observed. Such a goal cannot be achieved with the dissolved dye, which permeates the vessel walls.
Collapse
|
104
|
Gary-Bobo M, Mir Y, Rouxel C, Brevet D, Basile I, Maynadier M, Vaillant O, Mongin O, Blanchard-Desce M, Morère A, Garcia M, Durand JO, Raehm L. Mannose-Functionalized Mesoporous Silica Nanoparticles for Efficient Two-Photon Photodynamic Therapy of Solid Tumors. Angew Chem Int Ed Engl 2011; 50:11425-9. [DOI: 10.1002/anie.201104765] [Citation(s) in RCA: 210] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Indexed: 12/22/2022]
|
105
|
Gary-Bobo M, Mir Y, Rouxel C, Brevet D, Basile I, Maynadier M, Vaillant O, Mongin O, Blanchard-Desce M, Morère A, Garcia M, Durand JO, Raehm L. Mannose-Functionalized Mesoporous Silica Nanoparticles for Efficient Two-Photon Photodynamic Therapy of Solid Tumors. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201104765] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
106
|
Raehm L, Durand JO, Brevet D, Gary-Bobo M, Garcia M, Morere A, Mongin O, Blanchard-Desce M, Maynadier M, Basile I, Rouxel C, Mir Y. Functionalized mesoporous silica nanoparticles for two-photon photodynamic therapy. Photodiagnosis Photodyn Ther 2011. [DOI: 10.1016/j.pdpdt.2011.03.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
107
|
Sissa C, Painelli A, Blanchard-Desce M, Terenziani F. Fluorescence Anisotropy Spectra Disclose the Role of Disorder in Optical Spectra of Branched Intramolecular-Charge-Transfer Molecules. J Phys Chem B 2011; 115:7009-20. [DOI: 10.1021/jp2027274] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
108
|
Alain-Rizzo V, Drouin-Kucma D, Rouxel C, Samb I, Bell J, Toullec PY, Michelet V, Leray I, Blanchard-Desce M. Synthesis, photophysical, and two-photon absorption properties of elongated phosphane oxide and sulfide derivatives. Chem Asian J 2011; 6:1080-91. [PMID: 21328699 DOI: 10.1002/asia.201000681] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2010] [Indexed: 01/08/2023]
Abstract
A series of rod-shaped and related three-branched push-pull derivatives containing phosphane oxide or phosphane sulfide (PO or PS)-as an electron-withdrawing group conjugated to electron-donating groups, such as amino or ether groups, with a conjugated rod consisting of arylene-vinylene or arylene-ethynylene building blocks-were prepared. These compounds were efficiently synthesized by a Grignard reaction followed by Sonogashira coupling. Their photophysical properties including absorption, emission, time-resolved fluorescence, and two-photon absorption (TPA) were investigated with special attention to structure-property relationships. These fluorophores show high fluorescence quantum yields and solvent-dependent experiments reveal that efficient intramolecular charge transfer occurs upon excitation, thereby leading to highly polar excited states, the polarity of which can be significantly enhanced by playing on the end groups and conjugated linker. Rod-shaped and related three-branched systems show similar fluorescence properties in agreement with excitation localization on one of the push-pull branches. By using stronger electron donors or replacing the arylene-ethynylene linkers with an arylene-vinylene one induces significant redshifts of both the low-energy one-photon absorption and TPA bands. Interestingly, a major enhancement in TPA responses is observed, whereas OPA intensities are only weakly affected. Similarly, phosphane oxide derivatives show similar OPA responses than the corresponding sulfides but their TPA responses are significantly larger. Finally, the electronic coupling between dipolar branches promoted by common PO or PS acceptor moieties induces either slight enhancement of the TPA responses or broadening of the TPA band in the near infrared (NIR) region. Such behavior markedly contrasts with triphenylamine-core-mediated coupling, which gives evidence for the different types of interactions between branches.
Collapse
|
109
|
Rouxel C, Charlot M, Mir Y, Frochot C, Mongin O, Blanchard-Desce M. Banana-shaped biphotonic quadrupolar chromophores: from fluorophores to biphotonic photosensitizers. NEW J CHEM 2011. [DOI: 10.1039/c1nj20073a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
110
|
Malvolti F, Rouxel C, Mongin O, Hapiot P, Toupet L, Blanchard-Desce M, Paul F. Optical electron transfer through 2,7-diethynylfluorene spacers in mixed-valent complexes containing electron-rich “(η2-dppe)(η5-C5Me5)Fe” endgroups. Dalton Trans 2011; 40:6616-8. [DOI: 10.1039/c1dt10231a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
111
|
Four M, Riehl D, Mongin O, Blanchard-Desce M, Lawson-Daku LM, Moreau J, Chauvin J, Delaire JA, Lemercier G. A novel ruthenium(ii) complex for two-photon absorption-based optical power limiting in the near-IR range. Phys Chem Chem Phys 2011; 13:17304-12. [DOI: 10.1039/c1cp21661a] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
112
|
Katan C, Blanchard-Desce M, Tretiak S. Position Isomerism on One and Two Photon Absorption in Multibranched Chromophores: A TDDFT Investigation. J Chem Theory Comput 2010; 6:3410-26. [DOI: 10.1021/ct1004406] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
113
|
Lambry JC, Beaumont E, Tarus B, Blanchard-Desce M, Slama-Schwok A. Selective probing of a NADPH site controlled light-induced enzymatic catalysis. J Mol Recognit 2010; 23:379-88. [PMID: 20029835 DOI: 10.1002/jmr.1009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Achieving molecular recognition of NADPH binding sites is a compelling strategy to control many redox biological processes. The NADPH sites recognize the ubiquitous NADPH cofactor via highly conserved binding interactions, despite differences in the regulation of the hydride transfer in redox active proteins. We recently developed a photoactive NADPH substitute, called nanotrigger NT synchronizing the initiation of enzymatic catalysis of the endothelial NO-synthase (eNOS) with a laser pulse. Spatial and temporal control of enzymatic activity by such a designed light-driven activator would benefit from achieving molecular selectivity, i.e. activation of a single NADPH-mediated enzyme.In this work, we probe the ability of NT to discriminate between two NADPH sites with light. The selected NADPH sites belong to dihydrofolate reductase dihydrofolate reductase enzyme (DHFR) and endothelial NO-synthase (eNOS). Ultrafast kinetics showed that NT could not activate DHFR catalysis with a laser pulse in contrast with the observed trigger of eNOS catalysis leading to NO formation. Homology modelling, molecular dynamics simulations showed that NT discriminated between the two NADPH sites by different donor to acceptor distances and by local steric effects hindering light activation of DHFR catalysis. The data suggested that the narrow NADPH site required a tight fit of the nanotrigger at a suitable distance/angle to the electron acceptor for a specific activation of the catalysis. The ability of the nanotrigger to activate eNOS combined with a low reactivity in unfavourable NADPH sites makes NT a highly promising tool for targeting eNOS in endothelial cells with a laser pulse.
Collapse
|
114
|
Arrhenius TS, Blanchard-Desce M, Dvolaitzky M, Lehn JM, Malthete J. Molecular devices: Caroviologens as an approach to molecular wires-synthesis and incorporation into vesicle membranes. Proc Natl Acad Sci U S A 2010; 83:5355-9. [PMID: 16593731 PMCID: PMC386284 DOI: 10.1073/pnas.83.15.5355] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Molecular wires, which would allow electron flow to take place between different components, are important elements in the design of molecular devices. An approach to such species would be molecules possessing an electron-conducting conjugated chain, terminal electroactive polar groups, and a length sufficient to span a lipid membrane. To this end, bispyridinium polyenes of different lengths have been synthesized and their incorporation into the bilayer membrane of sodium dihexadecyl phosphate vesicles has been studied. Since they combine the features of carotenoids and of viologens, they may be termed caroviologens. Vesicles containing the caroviologen whose length approximately corresponds to the thickness of the sodium dihexadecyl phosphate bilayer display temperature-dependent changes of its absorption spectrum reflecting the gel --> liquid-crystal phase transition of the membrane. The data agree with a structural model in which the caroviologens of sufficient length span the bilayer membrane, the pyridinium sites being close to the negatively charged outer and inner surfaces of the sodium dihexadecyl phosphate vesicles and the polyene chain crossing the lipidic interior of the membrane. These membranes may now be tested in processes in which the caroviologen would function as a continuous, transmembrane electron channel-i.e., as a molecular wire. Various further developments may be envisaged along these lines.
Collapse
|
115
|
Lebret V, Raehm L, Durand JO, Smaïhi M, Werts MHV, Blanchard-Desce M, Méthy-Gonnod D, Dubernet C. Folic Acid-Targeted Mesoporous Silica Nanoparticles for Two-Photon Fluorescence. J Biomed Nanotechnol 2010; 6:176-80. [DOI: 10.1166/jbn.2010.1112] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
116
|
Katan C, Charlot M, Mongin O, Le Droumaguet C, Jouikov V, Terenziani F, Badaeva E, Tretiak S, Blanchard-Desce M. Simultaneous Control of Emission Localization and Two-Photon Absorption Efficiency in Dissymmetrical Chromophores. J Phys Chem B 2010; 114:3152-69. [DOI: 10.1021/jp911445m] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
117
|
Terenziani F, Parthasarathy V, Pla-Quintana A, Maishal T, Caminade AM, Majoral JP, Blanchard-Desce M. Cooperative two-photon absorption enhancement by through-space interactions in multichromophoric compounds. Angew Chem Int Ed Engl 2010; 48:8691-4. [PMID: 19827071 DOI: 10.1002/anie.200903519] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
118
|
Zoon PD, van Stokkum IHM, Parent M, Mongin O, Blanchard-Desce M, Brouwer AM. Fast photo-processes in triazole-based push–pull systems. Phys Chem Chem Phys 2010; 12:2706-15. [DOI: 10.1039/b921322h] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
119
|
Sissa C, Parthasarathy V, Drouin-Kucma D, Werts MHV, Blanchard-Desce M, Terenziani F. The effectiveness of essential-state models in the description of optical properties of branched push–pull chromophores. Phys Chem Chem Phys 2010; 12:11715-27. [DOI: 10.1039/c003563g] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
120
|
Terenziani F, Parthasarathy V, Pla-Quintana A, Maishal T, Caminade AM, Majoral JP, Blanchard-Desce M. Cooperative Two-Photon Absorption Enhancement by Through-Space Interactions in Multichromophoric Compounds. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200903519] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
121
|
Lebret V, Raehm L, Durand JO, Smaïhi M, Gerardin C, Nerambourg N, Werts MH, Blanchard-Desce M, Méthy-Gonnod D, Dubernet C. Nanoparticules de silice mésoporeuse optimisées pour la fluorescence à deux photons. Med Sci (Paris) 2009; 25:744-6. [DOI: 10.1051/medsci/2009258-9744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
122
|
Guo M, Varnavski O, Narayanan A, Mongin O, Majoral JP, Blanchard-Desce M, Goodson T. Investigations of energy migration in an organic dendrimer macromolecule for sensory signal amplification. J Phys Chem A 2009; 113:4763-71. [PMID: 19317441 DOI: 10.1021/jp8112123] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The issue of macromolecular exciton delocalization length and fluorescence sensing of energetic materials is investigated and modeled from results of nonlinear optical and time-resolved spectroscopy. By using two- and three-photon absorption techniques the fluorescence quenching effects of an organic dendrimer for sensing TNT were carried out. The Stern-Volmer plots for the set of dendrimers were examined and a large quenching constant for the dendrimer G4 was obtained (1400 M(-1)). The quenching constant was found to increase with the dendrimer generation number. The mechanism for the enhanced sensitivity of the dendrimer system was examined by probing the exciton dynamics with femtosecond fluorescence up-conversion. Fluorescence lifetime measurements revealed a multicomponent relaxation that varied with dendrimer generation. Fluorescence anisotropy decay measurements were used to probe the exciton migration length in these dendrimer systems and for the large structure the excitation migration area covers approximately 20 units. All of these results were used in a model that describes the exciton localization length with the fluorescence quenching strength. The use of time-resolved techniques allows for a closer and more detailed description of the mechanism of sensory amplification in organic macromolecules.
Collapse
|
123
|
Beaumont E, Lambry JC, Blanchard-Desce M, Martasek P, Panda SP, van Faassen EEH, Brochon JC, Deprez E, Slama-Schwok A. NO formation by neuronal NO-synthase can be controlled by ultrafast electron injection from a nanotrigger. Chembiochem 2009; 10:690-701. [PMID: 19222033 DOI: 10.1002/cbic.200800721] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Nitric oxide synthases (NOSs) are unique flavohemoproteins with various roles in mammalian physiology. Constitutive NOS catalysis is initiated by fast hydride transfer from NADPH, followed by slower structural rearrangements. We used a photoactive nanotrigger (NT) to study the initial electron transfer to FAD in native neuronal NOS (nNOS) catalysis. Molecular modeling and fluorescence spectroscopy showed that selective NT binding to NADPH sites close to FAD is able to override Phe1395 regulation. Ultrafast injection of electrons into the protein electron pathway by NT photoactivation through the use of a femtosecond laser pulse is thus possible. We show that calmodulin, required for NO synthesis by constitutive NOS, strongly promotes intramolecular electron flow (6.2-fold stimulation) by a mechanism involving proton transfer to the reduced FAD(-) site. Site-directed mutagenesis using the S1176A and S1176T mutants of nNOS supports this hypothesis. The NT synchronized the initiation of flavoenzyme catalysis, leading to the formation of NO, as detected by EPR. This NT is thus promising for time-resolved X-ray and other cellular applications.
Collapse
|
124
|
Collings J, Poon SY, Le Droumaguet C, Charlot M, Katan C, Pålsson LO, Beeby A, Mosely J, Kaiser HM, Kaufmann D, Wong WY, Blanchard-Desce M, Marder T. The Synthesis and One- and Two-Photon Optical Properties of Dipolar, Quadrupolar and Octupolar Donor-Acceptor Molecules Containing Dimesitylboryl Groups. Chemistry 2009; 15:198-208. [DOI: 10.1002/chem.200801719] [Citation(s) in RCA: 189] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
125
|
Chevallier F, Charlot M, Katan C, Mongin F, Blanchard-Desce M. Novel chromophores from alternated pyridine–ethylenedioxythiophene unit oligomers: dramatic enhancement of photoluminescence properties in elongated derivatives. Chem Commun (Camb) 2009:692-4. [DOI: 10.1039/b815656e] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|