Journal Article

PUBDB-2024-06120

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png 2,3 : 6,7‐Naphthalene Bis(dicarboximide) Cyclophane: A Photofunctional Host for Ambient Delayed Fluorescence in Solution

Garain, S. ; Li, P.-L. ; Shoyama, K.Extern* ; Wuerthner, F. (Corresponding author)Extern*

2024
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/anie.202411102  doi:10.3204/PUBDB-2024-06120

Abstract: Harvesting triplet excitons of heavy atom-free purely organic chromophores under aerated conditions is challenging due to the quenching of long-lived triplet states by molecular oxygen and vibrational dissipation. Herein, we show a supramolecular approach of triplet harvesting via mitigating quenching pathways of a triplet harvester. Specifically, we used a host–guest system based on 2,3 : 6,7-naphthalene bis(dicarboximide)-derived cyclophane (NBICy) and carbazole derivative (EtCz). Complexation studies and single-crystal X-ray analysis showed the formation of a rigid host–guest complex (K≈10$^4$ M$^{−1}$ in CCl$_4$), resulting in triplet-exciton stabilization under aerated conditions via mitigating vibrational interference and oxygen quenching. Photophysical studies elucidate the delayed fluorescence emission from the charge-transfer state (1CT) with a quantum yield (QY) of 6–8 % under ambient conditions which increased up to 36 % in an inert atmosphere.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20231007 (I-20231007) (I-20231007)

Experiment(s):

1. PETRA Beamline P11 (PETRA III)

Appears in the scientific report 2024

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Database coverage:
; ; ; Chemical Reactions ; Clarivate Analytics Master Journal List ; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 15 ; Index Chemicus ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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