Energy Transfer in Self-Assembled [<i>n</i>]-Acene Fibers Involving ≥100 Donors Per Acceptor

Guerzo, André Del; Olive, Alexandre G. L.; Reichwagen, Jens; Hopf, Henning; Desvergne, Jean‐Pierre

doi:10.1021/ja0566228

Cited by 175 publications

(93 citation statements)

References 19 publications

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“…Despite their low concentration, energy transfer from the green to the red component was also evidenced, supporting a previous observation of long (4100 chromophores) energy hopping in such materials. 26 Similar results were achieved in a bi-component system using charge-transfer interactions between naphthalene and 1,2,4,5-tetracyanobenzene to assemble rigid tubes. Addition of a small amount of pyrene affords white light emission through energy transfer (Figure 1).…”

Section: Introductionsupporting

confidence: 55%

Energy transfer in supramolecular materials for new applications in photonics and electronics

Wong

Bassani

2014

NPG Asia Mater

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Supramolecular materials use self-assembly of molecular components to form complex architectures that may otherwise be extremely difficult to prepare. One of the fundamental aspects of this approach is that relatively weak intermolecular forces are used to direct the assembly of the subcomponents. An important point is how to achieve strong electronic communication throughout the material in view of the 'looseness' of the molecular constituents, which interact only weakly. This is particularly important for applications in molecular electronics where exciton delocalization and charge transport generally limit the overall device performance. This review focuses on recent advances in supramolecular materials and architectures that are engineered to possess efficient energy transfer between the self-assembled component in view of new applications in photonics and electronics.

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Section: Introductionsupporting

confidence: 55%

Energy transfer in supramolecular materials for new applications in photonics and electronics

Wong

Bassani

2014

NPG Asia Mater

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“…[15] It is considered that the gel fiber formed should be applicable as an effective electronand light-emitting nanomaterial, because of exciton delocalization along the fiber network. [16] Furthermore, we can expect that the three kinds of gelators designed would give similarly shaped nanofibers because their coordination geometry is the same, whereas the properties of these fibrous structures could be controlled by choosing the central metal ( Figure 1). To clarify the gelation effect, we also designed nongelling reference compounds 2 M, which have 2-ethylhexyl moieties as solubilizing substituents.…”

Section: Introductionmentioning

confidence: 99%

Organogels of 8‐Quinolinol/Metal(II)–Chelate Derivatives That Show Electron‐ and Light‐Emitting Properties

Shirakawa

Fujita

Tani

et al. 2007

Chemistry A European J

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8-quinolinol/copper(II)-, palladium(II)-, and platinum(II)-chelate-based organogelators (1 M) and their nongelling reference compounds (2 M) were synthesized. Complexes 1 M could gelate various organic solvents at very low concentrations. Electron microscope measurements gave visual images of well-developed fibrous structures characteristic of low-molecular-weight organogels. UV/Vis and FTIR spectroscopy revealed that the good gelation ability of 1 M arises from the pi-pi interactions of the chelate moieties and the hydrogen-bond interactions among the amide groups. Very interestingly, field emission performances of the nanofibers prepared from the 1 M gels are evidently different depending on the electronic states of the three kinds of central metals. In addition, the 1 Pt gel shows unique thermo- and solvatochromism of visible and phosphorescent color in response to a sol-gel phase transition. Furthermore, the 1 Pt gel possesses an attractive ability to inhibit dioxygen quenching of excited triplet states, which increases the phosphorescence quantum yield of this gel. This effect is attributed to the isolation effect of the phosphorescent chelate moiety from the dioxygen-containing solution phase.

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“…8 For example, gels with chromophore units have been used as photocatalysts 9,10 and excitation energy transfer has been studied in supramolecular gels formed by photoactive fibers which contained entrapped dyes. [11][12][13][14][15] Recently, we reported orthogonal fibrillization of two fluorescent supramolecular gelators. 16 Additionally, supramolecular gels have been used as photon upconversion matrixes based on the triplet-triplet-annihilation mechanism via organic molecules.…”

Section: Introductionmentioning

confidence: 99%

Multimodal Light-Harvesting Soft Hybrid Materials: Assisted Energy Transfer upon Thermally Reversible Gelation

et al. 2017

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Multimodal light-harvesting soft systems able to absorb UV-to-NIR radiations and convert into visible emissions have drawn much attention in the last years in order to explore new areas of application in energy, photonics, photocatalysis, sensors and so forth. Here, we present a new hybrid system combining a supramolecular photonic gel of naphthalimide-derived molecules self-assembled into fibers and upconverting NaYF 4 :Yb/Tm nanoparticles (UCNPs). The hybrid system presented here manipulates light reversibly as a result of an optical communication between the UCNPs and the photoactive gel network. Upon UV irradiation, the system shows the characteristic emission at 410 nm from the photoactive organomolecule. This emission is also activated upon 980 nm excitation thanks to an efficient energy transfer from the UCNPs to the fibrillary network. Interestingly, the intensity of this emission is thermally regulated during the reversible assembly or disassembly of the organogelator molecules, in such a way that gelator emission is only observed in the aggregated state. Additionally, the adsorption of the UCNPs with the supramolecular gel fibers enhance their emissive properties, a behavior ascribed to the isolation from solvent quenchers and surface defects, as well as an increased IR light scattering promoted by the fibrillary network. The reported system constitutes a unique case of a thermally regulated, reversible, dual UV and IR light harvesting hybrid soft material.3

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Energy Transfer in Self-Assembled [n]-Acene Fibers Involving ≥100 Donors Per Acceptor

Cited by 175 publications

References 19 publications

Energy transfer in supramolecular materials for new applications in photonics and electronics

Energy transfer in supramolecular materials for new applications in photonics and electronics

Organogels of 8‐Quinolinol/Metal(II)–Chelate Derivatives That Show Electron‐ and Light‐Emitting Properties

Multimodal Light-Harvesting Soft Hybrid Materials: Assisted Energy Transfer upon Thermally Reversible Gelation

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