Reorganization of perylene bisimide J-aggregates: from delocalized collective to localized individual excitations.
Tian, Yuxi LU ; Stepanenko, Vladimir ; Kaiser, Theo E ; Würthner, Frank and Scheblykin, Ivan LU
(2012)
In Nanoscale
4(1).
p.218-223
- Abstract
- Water-induced reorganization of individual one-dimensional J-aggregates of perylene bisimide (PBI) dyes was observed by fluorescence microscopy. Fluorescence spectra and decay kinetics of individual J-aggregates immobilized on glass surfaces were measured under a dry nitrogen atmosphere and under humid conditions. The fluorescence properties of PBI J-aggregates arisen from collective excitons under dry nitrogen atmosphere were changed to those of non-interacting dye monomers when water vapor was introduced into the environment (sample chamber). Time-dependent changes of the fluorescence spectra and lifetimes upon exposure to water vapor suggest an initial coordination of water molecules at defect sites leading to the formation of H-type... (More)
- Water-induced reorganization of individual one-dimensional J-aggregates of perylene bisimide (PBI) dyes was observed by fluorescence microscopy. Fluorescence spectra and decay kinetics of individual J-aggregates immobilized on glass surfaces were measured under a dry nitrogen atmosphere and under humid conditions. The fluorescence properties of PBI J-aggregates arisen from collective excitons under dry nitrogen atmosphere were changed to those of non-interacting dye monomers when water vapor was introduced into the environment (sample chamber). Time-dependent changes of the fluorescence spectra and lifetimes upon exposure to water vapor suggest an initial coordination of water molecules at defect sites leading to the formation of H-type dimer units that act as exciton quenchers, and a subsequent slower disintegration of the hydrogen-bonded J-aggregate into monomers that lack resonance coupling. Our present studies resulted in a direct demonstration of how drastically the optical properties of molecular ensembles and characteristics of their excited states can be changed by delicate reorganization of dye molecules at nanometre scales. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2220904
- author
- Tian, Yuxi
LU
; Stepanenko, Vladimir
; Kaiser, Theo E
; Würthner, Frank
and Scheblykin, Ivan
LU
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nanoscale
- volume
- 4
- issue
- 1
- pages
- 218 - 223
- publisher
- Royal Society of Chemistry
- external identifiers
-
- wos:000297848500029
- pmid:22075846
- scopus:83455219351
- ISSN
- 2040-3372
- DOI
- 10.1039/c1nr10973a
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
- id
- b0a881e9-e1e9-4052-a2ba-15b04bdae613 (old id 2220904)
- date added to LUP
- 2016-04-01 10:28:40
- date last changed
- 2022-01-25 23:37:30
@article{b0a881e9-e1e9-4052-a2ba-15b04bdae613,
abstract = {{Water-induced reorganization of individual one-dimensional J-aggregates of perylene bisimide (PBI) dyes was observed by fluorescence microscopy. Fluorescence spectra and decay kinetics of individual J-aggregates immobilized on glass surfaces were measured under a dry nitrogen atmosphere and under humid conditions. The fluorescence properties of PBI J-aggregates arisen from collective excitons under dry nitrogen atmosphere were changed to those of non-interacting dye monomers when water vapor was introduced into the environment (sample chamber). Time-dependent changes of the fluorescence spectra and lifetimes upon exposure to water vapor suggest an initial coordination of water molecules at defect sites leading to the formation of H-type dimer units that act as exciton quenchers, and a subsequent slower disintegration of the hydrogen-bonded J-aggregate into monomers that lack resonance coupling. Our present studies resulted in a direct demonstration of how drastically the optical properties of molecular ensembles and characteristics of their excited states can be changed by delicate reorganization of dye molecules at nanometre scales.}},
author = {{Tian, Yuxi and Stepanenko, Vladimir and Kaiser, Theo E and Würthner, Frank and Scheblykin, Ivan}},
issn = {{2040-3372}},
language = {{eng}},
number = {{1}},
pages = {{218--223}},
publisher = {{Royal Society of Chemistry}},
series = {{Nanoscale}},
title = {{Reorganization of perylene bisimide J-aggregates: from delocalized collective to localized individual excitations.}},
url = {{http://dx.doi.org/10.1039/c1nr10973a}},
doi = {{10.1039/c1nr10973a}},
volume = {{4}},
year = {{2012}},
}