On-demand acid-gated fluorescence switch-on in photo-generated nanospheres.
Chem Commun (Camb)
; 56(37): 4986-4989, 2020 May 07.
Article
em En
| MEDLINE
| ID: mdl-32297609
ABSTRACT
Herein, we introduce a fast, additive-free, ambient temperature photochemical approach - utilising the novel Diels-Alder cycloaddition of a photo-active ortho-methylbenzaldehyde (oMBA) with a terminal alkyne - for preparing functional acid-sensitive profluorescent nano-/microspheres in one step. Not previously reported, the possibility of applying such a reaction in the context of particle synthesis provides new possibilities for particle design, where multi-step reactivity can be gated into distinct steps. First, a photochemically-gated particle formation step yields a material possessing a reactive, spring-loaded intermediate at every cross-linking point. A second, on-demand step to initiate fluorescence generation subsequently imparts the properties of the chemical transformation to the material itself. The synthesised particles are narrow-disperse with an average diameter ranging from 170-380 nm.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article