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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202302664
|2 doi
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|a pubmed24n1192.xml
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|a (DE-627)NLM357913884
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|a (NLM)37289569
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|a DE-627
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|c DE-627
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|a eng
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|a Bo, Yifan
|e verfasserin
|4 aut
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|a One-Pot Synthesis and Excited-State Dynamics of Null Exciton-Coupled Diketopyrrolopyrroles Oligo-Grids
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|c 2023
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 21.09.2023
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.
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|a Exciton coupling in molecular aggregates plays a vital role in impacting and fine-tuning optoelectronic materials and their efficiencies in devices. A versatile platform to decipher aggregation-property relationships is built around multichromophoric architectures. Here, a series of cyclic diketopyrrolopyrrole (DPP) oligomers featuring nanoscale gridarene structures and rigid bifluorenyl spacers are designed and synthesized via one-pot Friedel-Crafts reaction. DPP dimer [2]Grid and trimer [3]Grid, which are cyclic rigid nanoarchitectures of rather different sizes, are further characterized via steady-state and time-resolved absorption and fluorescence spectroscopies. They exhibit monomer-like spectroscopic signatures in the steady-state measurements, from which null exciton couplings are derived. Moreover, in an apolar solvent, high fluorescence quantum yields and excited-state dynamics that resembled DPP monomer are gathered. In a polar solvent, the localized singlet excited state on a single DPP dissociates into the adjacent null coupling DPP with charge transfer characteristics. This pathway facilitates the evolution of the symmetry-broken charge-separated state (SB-CS). Notable is the fact that the SB-CS of [2]Grid is, on one hand, in equilibrium with the singlet excited state and promotes, on the other hand, the formation of the triplet excited state with a yield of 32% via charge recombination
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|a Journal Article
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|a diketopyrrolopyrroles
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|a null-aggregates
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|a rigidity of molecular structures
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| 650 |
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|a symmetry-breaking charge separation
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| 700 |
1 |
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|a Hou, Pengfei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wan, Jun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cao, Hongtao
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Yuyu
|e verfasserin
|4 aut
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|a Xie, Linghai
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Guldi, Dirk M
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 35(2023), 38 vom: 01. Sept., Seite e2302664
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:35
|g year:2023
|g number:38
|g day:01
|g month:09
|g pages:e2302664
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|u http://dx.doi.org/10.1002/adma.202302664
|3 Volltext
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