Publication detail

Control over rotary motion and multicolour switching in 3-hydroxyphtha-limide fluorophores: An interplay between AIE and ESIPT

Rastislav Smolka, Dancho Yordanov, Kosuke Nakashima , Martin Vala , Jozef Krajčovič , Martin Weiter , Anton Georgiev

Original Title

Control over rotary motion and multicolour switching in 3-hydroxyphtha-limide fluorophores: An interplay between AIE and ESIPT

Type

journal article in Web of Science

Language

English

Original Abstract

In this paper, we demonstrate the ability of N-substituted 3-hydroxyphthalimides with pyridine and isoquinoline rings to perform multicolour switching by different stimuli. Restriction of the C-N rotary motion of the heterocycles allows control over their photoluminescence performance (PLQY = 54-65%) in water-induced aggregation by an additive interplay of excited-state proton-mediated processes in the aggregates. Restriction of the rotations by the affinity of the heterocyclic nitrogen atoms to Zn2+ and switching to new emission bands (PLQY = 8-29%) in solution and solid state were also achieved. Protonation of the pyridine/isoquinoline rings allows the formation of intramolecular hydrogen bonds with the imide carbonyl groups, resulting in restricted rotations. The protonated forms switch to strong blue emission due to local excitation of the protonated heterocycles, which are unable to undergo proton transfer. Understanding the interplay between both photophysical processes would allow the switching of emissions by multistimuli.

Keywords

3-Hydroxyphthalimide; Aggregation -induced emission; Rotation; Multicolour switching; Excited -state intramolecular proton -transfer; Photoluminescence

Authors

Rastislav Smolka, Dancho Yordanov, Kosuke Nakashima , Martin Vala , Jozef Krajčovič , Martin Weiter , Anton Georgiev

Released

1. 4. 2023

Publisher

ELSEVIER SCI LTD

Location

OXFORD

ISBN

0143-7208

Periodical

DYES AND PIGMENTS

Year of study

215

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

111279

Pages to

111292

Pages count

13

URL

https://www.sciencedirect.com/science/article/pii/S0143720823002048?via%3Dihub

BibTex

@article{BUT184954,
  author="Rastislav {Smolka} and Martin {Vala} and Jozef {Krajčovič} and Martin {Weiter}",
  title="Control over rotary motion and multicolour switching in 3-hydroxyphtha-limide fluorophores: An interplay between AIE and ESIPT",
  journal="DYES AND PIGMENTS",
  year="2023",
  volume="215",
  number="1",
  pages="111279--111292",
  doi="10.1016/j.dyepig.2023.111279",
  issn="0143-7208",
  url="https://www.sciencedirect.com/science/article/pii/S0143720823002048?via%3Dihub"
}