Blinking of single dye molecules in a polymer matrix is correlated with free volume in polymers

Suzuki, Kota; Habuchi, Satoshi; Vácha, Martin

doi:10.1016/j.cplett.2011.02.041

Cited by 11 publications

(8 citation statements)

References 21 publications

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“…At lower illumination intensities, the on−off blinking effects were readily discernible in the autocorrelation curves, with blinking manifesting as features at the characteristic time scale of the blinking, as expected. 16,17 Autocorrelation curves were different for each spot's trajectory, with each spot exhibiting its own unique blinking dynamics, though features were most commonly observed at τ < 5 s, consistent with faster "flickering" of fluorescence intensity.…”

Section: ■ Experimental Methodsmentioning

confidence: 95%

Single-Molecule Fluorescence Spectroscopy of Phase-Separated 10,12-Pentacosadynoic Acid Films

Yeboah

Sowah-Kuma

et al. 2021

J. Phys. Chem. B

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Phase-separated monolayers of 10,12-pentacosadiynoic acid and perfluorotetradecanoic acid can be photopolymerized to produce micrometer-sized, fluorescent polydiacetylene fibers at the air−solid interface. The photopolymer fibers were not uniformly fluorescent but rather showed a series of fluorescent spots along their lengths. The spots exhibited the classic properties of single-molecule fluorescence emission, including diffractionlimited size and fluorescence intermittency ("on−off blinking"). We have analyzed the fluorescence blinking dynamics of these spots using a variety of single-molecule analysis approaches, including fluorescence intensity histograms, autocorrelation analysis, as well as cross-correlation analysis as a function of distance between individual transition dipole moments, and propose a simple physical model for the fiber structure based on the observed blinking dynamics, in which the polymer fibers contain numerous structural defects. The model was supported by grazing incidence X-ray diffraction measurements of the mixed monolayer films at the air−water interface, in which it was observed that the presence of perfluorocarbon in the mixed monolayers significantly inhibited the ability of the 10,12-pentacosadiynoic acid to polymerize.

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Section: ■ Experimental Methodsmentioning

confidence: 95%

Single-Molecule Fluorescence Spectroscopy of Phase-Separated 10,12-Pentacosadynoic Acid Films

Yeboah

Sowah-Kuma

et al. 2021

J. Phys. Chem. B

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“…This study concluded that the dark-state corresponds to temporary dissociation of the charge transfer complex which can occur only when sufficient free volume is available. In contrast, studies by Suzuki et al on DiI (1,1′-dioctadecyl-3,3,3′3′-tetramethylindocarbocyanine) in different polymers found that the measured lifetimes for this system do not depend on polymer [ 119 ]. A similar observation was made by Yoo et al in studies of π-stacked perylenediimide (PDI).…”

Section: Photoluminescence Intermittency In Organic Luminophoresmentioning

confidence: 99%

Photoluminescence Intermittency from Single Quantum Dots to Organic Molecules: Emerging Themes

Riley

Hess

Reid

2012

IJMS

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Recent experimental and theoretical studies of photoluminescence intermittency (PI) or “blinking” exhibited by single core/shell quantum dots and single organic luminophores are reviewed. For quantum dots, a discussion of early models describing the origin of PI in these materials and recent challenges to these models are presented. For organic luminophores the role of electron transfer, proton transfer and other photophysical processes in PI are discussed. Finally, new experimental and data analysis methods are outlined that promise to be instrumental in future discoveries regarding the origin(s) of PI exhibited by single emitters.

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“…For this mechanism, an excess of free volume in the matrix was found to be correlated with a larger fraction of molecules showing blinking. 54…”

Section: Photophysics Of the Triplet Statementioning

confidence: 99%

Single-molecule photophysics, from cryogenic to ambient conditions

Kozankiewicz

Orrit

2014

Chem. Soc. Rev.

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We review recent progress in characterizing and understanding the photophysics of single molecules in condensed matter, mostly at cryogenic temperatures. We discuss the central role of the triplet state in limiting the number of useful host-guest systems, notably a new channel, intermolecular intersystem crossing. Another important limitation to the use of single molecules is their photo-reactivity, leading to blinking of the fluorescence signal, and eventually to its loss by photo-bleaching. These processes are at the heart of modern super-resolution schemes. We then examine some of the new host-guest systems recently discovered following these general principles, and the mechanisms of spectral diffusion and dephasing that they have revealed. When charges are injected into organic conductors, they get trapped and influence single molecules via the local fields they create in the material, and via their coupling to localized vibrations. Understanding these processes is necessary for better control of spectral diffusion and dephasing of single molecules. We finally conclude by giving some outlook on future directions of this fascinating field.

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Blinking of single dye molecules in a polymer matrix is correlated with free volume in polymers

Cited by 11 publications

References 21 publications

Single-Molecule Fluorescence Spectroscopy of Phase-Separated 10,12-Pentacosadynoic Acid Films

Single-Molecule Fluorescence Spectroscopy of Phase-Separated 10,12-Pentacosadynoic Acid Films

Photoluminescence Intermittency from Single Quantum Dots to Organic Molecules: Emerging Themes

Single-molecule photophysics, from cryogenic to ambient conditions

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