Red Thermally Activated Delayed Fluorescence in Dibenzopyridoquinoxaline-Based Nanoaggregates

Abstract All-organic thermally activated delayed fluorescence (TADF) materials have emerged as potential candidates for optoelectronic devices and biomedical applications. However, the development of organic TADF probes with strong emission in the longer wavelength region (> 600 nm) rem...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Subhadeep Das, Subhankar Kundu, Bahadur Sk, Madhurima Sarkar, Abhijit Patra
Formato:	article
Lenguaje:	EN
Publicado:	Georg Thieme Verlag 2021
Materias:	tadf dibenzopyridoquinoxaline nanoaggregates fluorescence imaging lipid droplets Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/c18945767b014e4ea2bd068def0d1fdd
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:c18945767b014e4ea2bd068def0d1fdd
record_format	dspace
spelling	oai:doaj.org-article:c18945767b014e4ea2bd068def0d1fdd2021-11-27T00:45:19ZRed Thermally Activated Delayed Fluorescence in Dibenzopyridoquinoxaline-Based Nanoaggregates2625-182510.1055/a-1679-9558https://doaj.org/article/c18945767b014e4ea2bd068def0d1fdd2021-10-01T00:00:00Zhttp://www.thieme-connect.de/DOI/DOI?10.1055/a-1679-9558https://doaj.org/toc/2625-1825Abstract All-organic thermally activated delayed fluorescence (TADF) materials have emerged as potential candidates for optoelectronic devices and biomedical applications. However, the development of organic TADF probes with strong emission in the longer wavelength region (> 600 nm) remains a challenge. Strong π-conjugated rigid acceptor cores substituted with multiple donor units can be a viable design strategy to obtain red TADF probes. Herein, 3,6-di-t-butyl carbazole substituted to a dibenzopyridoquinoxaline acceptor core resulted in a T-shaped donor–acceptor–donor compound, PQACz-T, exhibiting red TADF in polymer-embedded thin-films. Further, PQACz-T self-assembled to molecular nanoaggregates of diverse size and shape in THF–water mixture showing bright red emission along with delayed fluorescence even in an aqueous environment. The self-assembly and the excited-state properties of PQACz-T were compared with the nonalkylated analogue, PQCz-T. The delayed fluorescence in nanoaggregates was attributed to the high rate of reverse intersystem crossing. Moreover, an aqueous dispersion of the smaller-sized, homogeneous distribution of fluorescent nanoparticles was fabricated upon encapsulating PQACz-T in a triblock copolymer, F-127. Cytocompatible polymer-encapsulated PQACz-T nanoparticles with large Stokes shift and excellent photostability were demonstrated for the specific imaging of lipid droplets in HeLa cells.Subhadeep DasSubhankar KunduBahadur SkMadhurima SarkarAbhijit PatraGeorg Thieme Verlagarticletadfdibenzopyridoquinoxalinenanoaggregatesfluorescence imaginglipid dropletsChemistryQD1-999ENOrganic Materials, Vol 3, Iss 04, Pp 477-487 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	tadf dibenzopyridoquinoxaline nanoaggregates fluorescence imaging lipid droplets Chemistry QD1-999
spellingShingle	tadf dibenzopyridoquinoxaline nanoaggregates fluorescence imaging lipid droplets Chemistry QD1-999 Subhadeep Das Subhankar Kundu Bahadur Sk Madhurima Sarkar Abhijit Patra Red Thermally Activated Delayed Fluorescence in Dibenzopyridoquinoxaline-Based Nanoaggregates
description	Abstract All-organic thermally activated delayed fluorescence (TADF) materials have emerged as potential candidates for optoelectronic devices and biomedical applications. However, the development of organic TADF probes with strong emission in the longer wavelength region (> 600 nm) remains a challenge. Strong π-conjugated rigid acceptor cores substituted with multiple donor units can be a viable design strategy to obtain red TADF probes. Herein, 3,6-di-t-butyl carbazole substituted to a dibenzopyridoquinoxaline acceptor core resulted in a T-shaped donor–acceptor–donor compound, PQACz-T, exhibiting red TADF in polymer-embedded thin-films. Further, PQACz-T self-assembled to molecular nanoaggregates of diverse size and shape in THF–water mixture showing bright red emission along with delayed fluorescence even in an aqueous environment. The self-assembly and the excited-state properties of PQACz-T were compared with the nonalkylated analogue, PQCz-T. The delayed fluorescence in nanoaggregates was attributed to the high rate of reverse intersystem crossing. Moreover, an aqueous dispersion of the smaller-sized, homogeneous distribution of fluorescent nanoparticles was fabricated upon encapsulating PQACz-T in a triblock copolymer, F-127. Cytocompatible polymer-encapsulated PQACz-T nanoparticles with large Stokes shift and excellent photostability were demonstrated for the specific imaging of lipid droplets in HeLa cells.
format	article
author	Subhadeep Das Subhankar Kundu Bahadur Sk Madhurima Sarkar Abhijit Patra
author_facet	Subhadeep Das Subhankar Kundu Bahadur Sk Madhurima Sarkar Abhijit Patra
author_sort	Subhadeep Das
title	Red Thermally Activated Delayed Fluorescence in Dibenzopyridoquinoxaline-Based Nanoaggregates
title_short	Red Thermally Activated Delayed Fluorescence in Dibenzopyridoquinoxaline-Based Nanoaggregates
title_full	Red Thermally Activated Delayed Fluorescence in Dibenzopyridoquinoxaline-Based Nanoaggregates
title_fullStr	Red Thermally Activated Delayed Fluorescence in Dibenzopyridoquinoxaline-Based Nanoaggregates
title_full_unstemmed	Red Thermally Activated Delayed Fluorescence in Dibenzopyridoquinoxaline-Based Nanoaggregates
title_sort	red thermally activated delayed fluorescence in dibenzopyridoquinoxaline-based nanoaggregates
publisher	Georg Thieme Verlag
publishDate	2021
url	https://doaj.org/article/c18945767b014e4ea2bd068def0d1fdd
work_keys_str_mv	AT subhadeepdas redthermallyactivateddelayedfluorescenceindibenzopyridoquinoxalinebasednanoaggregates AT subhankarkundu redthermallyactivateddelayedfluorescenceindibenzopyridoquinoxalinebasednanoaggregates AT bahadursk redthermallyactivateddelayedfluorescenceindibenzopyridoquinoxalinebasednanoaggregates AT madhurimasarkar redthermallyactivateddelayedfluorescenceindibenzopyridoquinoxalinebasednanoaggregates AT abhijitpatra redthermallyactivateddelayedfluorescenceindibenzopyridoquinoxalinebasednanoaggregates
_version_	1718409253607178240

Red Thermally Activated Delayed Fluorescence in Dibenzopyridoquinoxaline-Based Nanoaggregates

Ejemplares similares