Singlet Electronic Energy Transfer in Polymers Containing Naphthalene and Anthracene Chromophores

Holden, David A.; Guillet, J. E.

doi:10.1021/ma60074a016

Cited by 86 publications

(68 citation statements)

References 17 publications

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“…Subsequently, the w ET value for the film was estimated based on a comparison of the emission spectrum of the polymer with solubilized perylene in solution and in the film. According to the method originally proposed by Holden and Guillet [18] the following equation may be written for the solution system:…”

Section: Resultsmentioning

confidence: 99%

Novel Photoactive Polymeric Multilayer Films Formed via Electrostatic Self‐Assembly

Zapotoczny

Golonka

Nowakowska

2005

Macromol. Rapid Commun.

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Summary: We demonstrate a novel approach for constructing photoactive multilayer films in which the aggregation of fluorescing molecules is effectively eliminated. In the films formed via a layer‐by‐layer electrostatic self‐assembly technique, the core‐shell amphiphilic copolymer, poly[(sodium 4‐styrenesulfonate)‐block‐vinylnaphthalene], was deposited. The isolated cores served as nanosized host sites for photoactive guest molecules (pyrene, perylene). The efficient energy transfer between polymeric chromophores and perylene molecules was observed.AFM image of a nanostructured polymeric film prepared via a layer‐by‐layer technique and containing photoactive block copolymer poly[(sodium 4‐styrenesulfonate)‐block‐vinylnaphthalene]. Below is the representative height profile taken along the drawn line.magnified imageAFM image of a nanostructured polymeric film prepared via a layer‐by‐layer technique and containing photoactive block copolymer poly[(sodium 4‐styrenesulfonate)‐block‐vinylnaphthalene]. Below is the representative height profile taken along the drawn line.

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Section: Resultsmentioning

confidence: 99%

Novel Photoactive Polymeric Multilayer Films Formed via Electrostatic Self‐Assembly

Zapotoczny

Golonka

Nowakowska

2005

Macromol. Rapid Commun.

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“…For pHs 7 and 11 after the first 20 min, only minor changes are observed in the normal ized naphthalene or pyrene emission intensity for S-N-M micelles ( Figure 5). We plot the intensity of naphthalene fluorescence in terms of the efficiency of energy transfer to the pyrene, χ (25): where Id 0 is the fluorescence of the naphthalene before mixing (cor rected for dilution). For S-N-M at pH 3.5, pyrene emission shows an initial sharp increase when the micelle and pyrene solutions are mixed (see Figure 4), but then the pyrene begins to lose intensity (see Figure 5).…”

Section: Long-time Steady-state Resultsmentioning

confidence: 99%

Fluorescence Studies of Pyrene Capture by Naphthalene-Labeled Diblock Copolymer Micelles in Aqueous Media

Fox

Chan

Kiserow

et al. 1996

Advances in Chemistry

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Fluorescence techniques are used to characterize the diffusion of pyrene into several naphthalene-labeled diblock copolymer micelles as a function of pH. The capture of pyrene by the micelles is composed of a fast and a slow process, as shown by intensity and spectral changes in pyrene fluorescence observed when a solution containing pyrene is mixed with a solution containing labeled micelles. The most important pH effect was at low pH: The corona is collapsed. Sensitized pyrene fluorescence results are in accord with a model in which solubilization occurs within the micellar core. Equilibration time of the sensitized fluorescence suggests a pyrene diffusion constant on the order of 10 -16 cm 2 /s. Several anomalous photophysical features suggest that the micelle core may have a complex structure.POLYMERIC MICELLES have recently received considerable attention because of their potential usefulness in many areas as a matrix for controlled release and uptake of small molecules in aqueous and organic environments (1,2,4,5; for a review,

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“…In the glassy state I-Py-N shows an efficient "antenna" effect in the energy transfer from naphthalene to pyrene groups (14). For such high efficiency to be possible, most of the PyS03-groups must exist within a distance from the NS03-groups of less than the Forster radius Ro (28.64 A), defined as a distance at which there is a 0.5 probability for the NRET mechanism of deactivation of the donor excited state (16). Figure 4 shows the structured fluorescence spectra of pyrene and naphthalene on excitation of the naphthalene chromophores at 290 nm for ionenes with different counterions.…”

Section: Resultsmentioning

confidence: 99%

Photophysical studies of hydrophobically functionalized polyionene systems in aqueous solutions

Uznański¹,

Pęcherz²,

Κryszewski³

1995

Can. J. Chem.

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Complexes of polyionene and anionic dyes and surfactant were prepared by exchange reaction of counterions in the parent polymer. Fluorescence studies were conducted to observe some characteristic behaviour of these complexes in water Polyionenes with aromatic hydrocarbons adopt an open conformation and there is no evidence for interpolymer interactions. On the contrary, polyionenes with long aliphatic counterions easily form microdomains in aqueous solution due to hydrophobic interaction as evidenced by an increase in excimer emission. Microdomains have an interpolymer nature, as confirmed by measurements of energy transfer from naphthalene to pyrene moieties. Polyionenes with SDS counterions interact with external surfactant molecules and form polymer–surfactant aggregates. Electrostatic repulsions between aggregates dominate on hydrophobic interaction between polymer chains and are responsible for conformational changes. Keywords: hydrophobically modified polymers, surfactants, complexation, fluorescence, nonradiative energy transfer

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Singlet Electronic Energy Transfer in Polymers Containing Naphthalene and Anthracene Chromophores

Cited by 86 publications

References 17 publications

Novel Photoactive Polymeric Multilayer Films Formed via Electrostatic Self‐Assembly

Novel Photoactive Polymeric Multilayer Films Formed via Electrostatic Self‐Assembly

Fluorescence Studies of Pyrene Capture by Naphthalene-Labeled Diblock Copolymer Micelles in Aqueous Media

Photophysical studies of hydrophobically functionalized polyionene systems in aqueous solutions

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