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Title
Japanese: 
English:Supramolecular-scaffold-directed two-dimensional assembly of pentacene into a configuration to facilitate singlet fission 
Author
Japanese: 福光 真人, 福井 智也, 庄子 良晃, 梶谷 孝, R. Kahn, N. V. Tkachenko, H. Sakai, T. Hasobe, 福島 孝典.  
English: M. Fukumitsu, T. Fukui, Y. Shoji, T. Kajitani, R. Kahn, N. V. Tkachenko, H. Sakai, T. Hasobe, T. Fukushima.  
Language English 
Journal/Book name
Japanese: 
English:ChemRxiv 
Volume, Number, Page        
Published date Apr. 4, 2024 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://chemrxiv.org/engage/chemrxiv/article-details/660e895a21291e5d1d0a0496
 
DOI https://doi.org/10.26434/chemrxiv-2024-x9rjg-v2
Abstract Molecular assemblies featuring two-dimensionality have attracted increasing attention, whereas such structures are difficult to construct simply relying on spontaneous molecular assembly. Here we present two-dimensional assemblies of acene chromophores achieved using a tripodal triptycene supramolecular scaffold, which have been shown to exhibit a strong ability to assemble molecular and polymer motifs two-dimensionally. We designed pentacene and anthracene derivatives sandwiched by two tripodal triptycene units. These compounds assemble into expected two-dimensional structures, with the pentacene chromophores having both sufficient overlap to cause singlet fission and space for conformational change to facilitate the dissociation of a triplet pair into two free triplets, which is not the case for the anthracene analogue. Detailed spectroscopic analysis revealed that the pentacene chromophore in the assembly undergoes singlet fission with a high quantum yield (ΦSF = 88±5%), giving rise to triplet pairs, from which free triplets are efficiently generated (ΦT = 130±8.8%). This demonstrates the utility of the triptycene-based scaffold to design functional π-electronic molecular assemblies.

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