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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
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" }