Intramolecular electronic energy transfer between rigidly linked naphthalene and anthracene chromophores

Scholes, Gregory D.; Ghiggino, Kenneth P.; Oliver, Anna M.; Paddon‐Row, Michael N.

doi:10.1021/j100148a006

Cited by 105 publications

(105 citation statements)

References 10 publications

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“…In particular both through space and through bond ET were reported in systems containing naphtalene and anthracene [3][4][5]. The connector, c, cannot be considered as a simple innocent component and its role has been questioned, for example, in the through bond/through space classical discussion [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Switching from intramolecular energy transfer to intramolecular electron transfer by the action of pH and Zn2+ co-ordination

Albelda

Díaz

Garcı́a-España

et al. 2002

Chemical Physics Letters

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Intramolecular electron (eT) and energy transfer (ET) have shown to occur in a covalently linked donor-acceptor (CLDA) system consisting of a naphthalene donor covalently linked through a polyamine chain connector to an anthracene acceptor; the connector has been chosen in order to switch ON or OFF the energy flux as a function of its protonation state as well as by co-ordination to Zn 2þ . The largest energy transfer efficiency ðg ¼ 0:61Þ occurs for the fully protonated form ðpH < 2Þ, while at pH > 9 (eT) from the lone pairs of the nitrogens to the excited fluorophore takes place, leading to complete quenching of the emission. On the other hand at neutral and basic pH values, coordination of Zn 2þ prevents the eT quenching allowing the ET process to occur. Ó

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Section: Introductionmentioning

confidence: 99%

Switching from intramolecular energy transfer to intramolecular electron transfer by the action of pH and Zn2+ co-ordination

Albelda

Díaz

Garcı́a-España

et al. 2002

Chemical Physics Letters

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“…Electrons are coupled between monomers via through-space interactions, where the monomers are close enough spatially that there is an overlap of their electron density distributions, or through-bond interactions, where there is an indirect orbital overlap via an intervening σ bond framework. 11,12 On excitation, configurations are mixed by exchange interactions to create an exciton state whose spatial extent is determined by the degree of coherent sharing of the excitation among the monomers. 7 Interactions between excitons and nuclear motions introduce time-dependent confinement effects, where the exciton is confined to a region of the chain of typically 5 monomers termed a chromophore.…”

Section: Introductionmentioning

confidence: 99%

Trap Limited Exciton Transport in Conjugated Polymers

Athanasopoulos¹,

Hennebicq²,

Beljonne³

et al. 2008

J. Phys. Chem. C

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A Monte-Carlo approach based on hopping rates computed from quantum-chemical calculations is applied to model the energy diffusion dynamics in a polyindenofluorene conjugated polymer on a predetermined chain morphology. While the model predicts faster time-dependent energy evolution than that seen by site-selective experiments and yields a diffusion length that is an order of magnitude larger than typical experimental values, we show that these discrepancies can be corrected by introducing a low concentration of traps in the transport simulations. Implications for conjugated polymer based opto-electronic devices are discussed.

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“…The transfer of the excitons to the dye molecule typically occurs through space (TS) normally by a Förster energy transfer process, 9 which is a long-range dipole-dipole coupling process between the transition dipoles of the excited polymer and ground-state dye molecule. 10 The rate constant of the Förster energy transfer process, k T (r) is proportional to r -6 , where r is the distance between the donor and the acceptor. Hence the Förster energy transfer process occur normally only over a range of 1 to 50 Å.…”

Section: Introductionmentioning

confidence: 99%

“…The TB energy transfer is promoted by an orbital overlap, and is much faster than the TS transfer process. 10,12,13 The rate of the energy transfer TB can be tuned, if the dye molecule forms a part of the conjugated polymer backbone. Figure 1: In polymer blends the energy transfer between the polymer and the dye molecules occur by a TS process, which probably is of the Förster type.…”

Section: Introductionmentioning

confidence: 99%

Design of porphyrin-polyphenyleneethynylene light harvesting systems

2005

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The design of light harvesting systems based on zinc-porphyrin linked polyphenyleneethynylene systems is demonstrated through two different synthetic procedures. The use of the Sonogashira cross-coupling reaction was found to be problematic in several aspects and it was only possible for one of the synthetic strategies to incorporate a single porphyrin molecule in each polymer chain. The polymer materials were separated into fractions using preparative SEC and subjected to photophysical studies in both the solution and in the solid state. In the solid state light harvesting by the pendent polyphenyleneethynylene and energy transfer to the zinc-porphyrin was found to be high whereas it was low in solution. This observation was confirmed when making electroactive devices. I/V characteristics were measured on fabricated solar cells of the polymers. Material properties for the native polyphenyleneethynylene were determined using ultra violet photoelectron spectroscopy on thin films and carrier mobility studies were performed using pulse radiolysis time resolved microwave conductivity.

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Intramolecular electronic energy transfer between rigidly linked naphthalene and anthracene chromophores

Cited by 105 publications

References 10 publications

Switching from intramolecular energy transfer to intramolecular electron transfer by the action of pH and Zn2+ co-ordination

Switching from intramolecular energy transfer to intramolecular electron transfer by the action of pH and Zn2+ co-ordination

Trap Limited Exciton Transport in Conjugated Polymers

Design of porphyrin-polyphenyleneethynylene light harvesting systems

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