Diffusion-assisted acid-base non-exponential dynamics in the short time domain

Boiko Cohen; Pavel Leiderman; Dan Huppert

doi:10.1016/S0022-2313(02)00624-5

Diffusion-assisted acid-base non-exponential dynamics in the short time domain

Boiko Cohen, Pavel Leiderman, Dan Huppert^*

^*Corresponding author for this work

School of Chemistry

Tel Aviv University

Research output: Contribution to journal › Conference article › peer-review

6 Scopus citations

Abstract

We measured the direct proton transfer between a photoacid, 8-hydroxypyrene-1,3,6-trisulfonate (HPTS), and a base, acetate anion, in water and water-glycerol mixtures. We used the pump-probe technique with ∼150 fs time resolution to excite the sample at 400nm and monitor the change in the sample transmittance as a function of both time and wavelength. We analyzed the experimental data using the irreversible diffusion-controlled Smoluchowski model. As the solution viscosity increases, from about 1 cP (neat water) to 10 cP, at 0.27 mole fraction of glycerol, the probe signal decay becomes longer and increasingly non-exponential.

Original language	English
Pages (from-to)	682-687
Number of pages	6
Journal	Journal of Luminescence
Volume	102-103
Issue number	SPEC
DOIs	https://doi.org/10.1016/S0022-2313(02)00624-5
State	Published - May 2003
Event	Proceedings of the 2002 International Conference on Luminescence - Budapest, Hungary Duration: 24 Aug 2002 → 29 Aug 2002

Keywords

Acid-base
Diffusion assisted reaction

Access to Document

10.1016/S0022-2313(02)00624-5

Cite this

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title = "Diffusion-assisted acid-base non-exponential dynamics in the short time domain",

abstract = "We measured the direct proton transfer between a photoacid, 8-hydroxypyrene-1,3,6-trisulfonate (HPTS), and a base, acetate anion, in water and water-glycerol mixtures. We used the pump-probe technique with ∼150 fs time resolution to excite the sample at 400nm and monitor the change in the sample transmittance as a function of both time and wavelength. We analyzed the experimental data using the irreversible diffusion-controlled Smoluchowski model. As the solution viscosity increases, from about 1 cP (neat water) to 10 cP, at 0.27 mole fraction of glycerol, the probe signal decay becomes longer and increasingly non-exponential.",

keywords = "Acid-base, Diffusion assisted reaction",

author = "Boiko Cohen and Pavel Leiderman and Dan Huppert",

note = "Funding Information: We are grateful to Prof. N. Agmon for his helpful discussion. This work was supported by grants from the Binational US–Israel Science Foundation and the James–Franck German–Israel program in laser–matter interaction. ; Proceedings of the 2002 International Conference on Luminescence ; Conference date: 24-08-2002 Through 29-08-2002",

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doi = "10.1016/S0022-2313(02)00624-5",

language = "אנגלית",

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journal = "Journal of Luminescence",

issn = "0022-2313",

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T1 - Diffusion-assisted acid-base non-exponential dynamics in the short time domain

AU - Cohen, Boiko

AU - Leiderman, Pavel

AU - Huppert, Dan

N1 - Funding Information: We are grateful to Prof. N. Agmon for his helpful discussion. This work was supported by grants from the Binational US–Israel Science Foundation and the James–Franck German–Israel program in laser–matter interaction.

PY - 2003/5

Y1 - 2003/5

N2 - We measured the direct proton transfer between a photoacid, 8-hydroxypyrene-1,3,6-trisulfonate (HPTS), and a base, acetate anion, in water and water-glycerol mixtures. We used the pump-probe technique with ∼150 fs time resolution to excite the sample at 400nm and monitor the change in the sample transmittance as a function of both time and wavelength. We analyzed the experimental data using the irreversible diffusion-controlled Smoluchowski model. As the solution viscosity increases, from about 1 cP (neat water) to 10 cP, at 0.27 mole fraction of glycerol, the probe signal decay becomes longer and increasingly non-exponential.

AB - We measured the direct proton transfer between a photoacid, 8-hydroxypyrene-1,3,6-trisulfonate (HPTS), and a base, acetate anion, in water and water-glycerol mixtures. We used the pump-probe technique with ∼150 fs time resolution to excite the sample at 400nm and monitor the change in the sample transmittance as a function of both time and wavelength. We analyzed the experimental data using the irreversible diffusion-controlled Smoluchowski model. As the solution viscosity increases, from about 1 cP (neat water) to 10 cP, at 0.27 mole fraction of glycerol, the probe signal decay becomes longer and increasingly non-exponential.

KW - Acid-base

KW - Diffusion assisted reaction

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SN - 0022-2313

VL - 102-103

SP - 682

EP - 687

JO - Journal of Luminescence

JF - Journal of Luminescence

IS - SPEC

T2 - Proceedings of the 2002 International Conference on Luminescence

Y2 - 24 August 2002 through 29 August 2002

ER -

Diffusion-assisted acid-base non-exponential dynamics in the short time domain

Abstract

Keywords

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