Confinement effect on the photophysics of ESIPT fluorophores

Fabiano S. Santos, Elamparuthi Ramasamy, Vaidhyanathan Ramamurthy, Fabiano S. Rodembusch

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The photophysics of three benzothiazole derivatives that exhibit excited state intramolecular proton transfer (ESIPT) were investigated in a confined medium afforded by the water soluble supramolecular host octaacid (OA). The dye@(OA)2 inclusion complexes were probed by UV-Vis absorption, steady-state and time resolved fluorescence emission techniques. Comparison studies of the free dyes in solution were also conducted. All three benzothiazole derivatives free in solution and as OA complexes in water absorb in the UV region. The fluorescence maxima of the OA complexes in water are similar to those in an apolar environment. This is different from the emission behavior of the dyes dissolved alone in water. The observed Stokes shift when confined within OA is related to the intramolecular proton transfer mechanism. Within OA only neutral species are present, indicating that these compounds are shielded from the bulk water. The excited state behavior of the benzothiazole derivatives in a confined medium indicates that supramolecular effects significantly alter the nature of the fluorescence emission.

Original languageEnglish (US)
Pages (from-to)2820-2827
Number of pages8
JournalJournal of Materials Chemistry C
Volume4
Issue number14
DOIs
StatePublished - Apr 14 2016

Fingerprint

Proton transfer
Fluorophores
Excited states
Water
Dyes
Fluorescence
Derivatives
Coloring Agents
benzothiazole

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

Cite this

Confinement effect on the photophysics of ESIPT fluorophores. / Santos, Fabiano S.; Ramasamy, Elamparuthi; Ramamurthy, Vaidhyanathan; Rodembusch, Fabiano S.

In: Journal of Materials Chemistry C, Vol. 4, No. 14, 14.04.2016, p. 2820-2827.

Research output: Contribution to journalArticle

Santos, Fabiano S. ; Ramasamy, Elamparuthi ; Ramamurthy, Vaidhyanathan ; Rodembusch, Fabiano S. / Confinement effect on the photophysics of ESIPT fluorophores. In: Journal of Materials Chemistry C. 2016 ; Vol. 4, No. 14. pp. 2820-2827.
@article{7f136a8b6c0a4b3d869e9c65b97f5783,
title = "Confinement effect on the photophysics of ESIPT fluorophores",
abstract = "The photophysics of three benzothiazole derivatives that exhibit excited state intramolecular proton transfer (ESIPT) were investigated in a confined medium afforded by the water soluble supramolecular host octaacid (OA). The dye@(OA)2 inclusion complexes were probed by UV-Vis absorption, steady-state and time resolved fluorescence emission techniques. Comparison studies of the free dyes in solution were also conducted. All three benzothiazole derivatives free in solution and as OA complexes in water absorb in the UV region. The fluorescence maxima of the OA complexes in water are similar to those in an apolar environment. This is different from the emission behavior of the dyes dissolved alone in water. The observed Stokes shift when confined within OA is related to the intramolecular proton transfer mechanism. Within OA only neutral species are present, indicating that these compounds are shielded from the bulk water. The excited state behavior of the benzothiazole derivatives in a confined medium indicates that supramolecular effects significantly alter the nature of the fluorescence emission.",
author = "Santos, {Fabiano S.} and Elamparuthi Ramasamy and Vaidhyanathan Ramamurthy and Rodembusch, {Fabiano S.}",
year = "2016",
month = "4",
day = "14",
doi = "10.1039/c5tc03245h",
language = "English (US)",
volume = "4",
pages = "2820--2827",
journal = "Journal of Materials Chemistry C",
issn = "2050-7526",
publisher = "Royal Society of Chemistry",
number = "14",

}

TY - JOUR

T1 - Confinement effect on the photophysics of ESIPT fluorophores

AU - Santos, Fabiano S.

AU - Ramasamy, Elamparuthi

AU - Ramamurthy, Vaidhyanathan

AU - Rodembusch, Fabiano S.

PY - 2016/4/14

Y1 - 2016/4/14

N2 - The photophysics of three benzothiazole derivatives that exhibit excited state intramolecular proton transfer (ESIPT) were investigated in a confined medium afforded by the water soluble supramolecular host octaacid (OA). The dye@(OA)2 inclusion complexes were probed by UV-Vis absorption, steady-state and time resolved fluorescence emission techniques. Comparison studies of the free dyes in solution were also conducted. All three benzothiazole derivatives free in solution and as OA complexes in water absorb in the UV region. The fluorescence maxima of the OA complexes in water are similar to those in an apolar environment. This is different from the emission behavior of the dyes dissolved alone in water. The observed Stokes shift when confined within OA is related to the intramolecular proton transfer mechanism. Within OA only neutral species are present, indicating that these compounds are shielded from the bulk water. The excited state behavior of the benzothiazole derivatives in a confined medium indicates that supramolecular effects significantly alter the nature of the fluorescence emission.

AB - The photophysics of three benzothiazole derivatives that exhibit excited state intramolecular proton transfer (ESIPT) were investigated in a confined medium afforded by the water soluble supramolecular host octaacid (OA). The dye@(OA)2 inclusion complexes were probed by UV-Vis absorption, steady-state and time resolved fluorescence emission techniques. Comparison studies of the free dyes in solution were also conducted. All three benzothiazole derivatives free in solution and as OA complexes in water absorb in the UV region. The fluorescence maxima of the OA complexes in water are similar to those in an apolar environment. This is different from the emission behavior of the dyes dissolved alone in water. The observed Stokes shift when confined within OA is related to the intramolecular proton transfer mechanism. Within OA only neutral species are present, indicating that these compounds are shielded from the bulk water. The excited state behavior of the benzothiazole derivatives in a confined medium indicates that supramolecular effects significantly alter the nature of the fluorescence emission.

UR - http://www.scopus.com/inward/record.url?scp=84963807888&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84963807888&partnerID=8YFLogxK

U2 - 10.1039/c5tc03245h

DO - 10.1039/c5tc03245h

M3 - Article

AN - SCOPUS:84963807888

VL - 4

SP - 2820

EP - 2827

JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

SN - 2050-7526

IS - 14

ER -