Tuning the Aggregates of Thiophene-based Trimers by Methyl Side-chain Engineering for Photocatalytic Hydrogen Evolution - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Angewandte Chemie International Edition Année : 2023

Tuning the Aggregates of Thiophene-based Trimers by Methyl Side-chain Engineering for Photocatalytic Hydrogen Evolution

Xiaojiao Yuan
  • Fonction : Auteur
Kunran Yang
  • Fonction : Auteur
Chloé Grazon
Lorenzo Vallan
  • Fonction : Auteur
Jean-David Isasa
  • Fonction : Auteur
Pedro Resende
  • Fonction : Auteur
Fanxing Li
  • Fonction : Auteur
Cyril Brochon
Hynd Remita
  • Fonction : Auteur
Georges Hadziioannou
Eric Cloutet
  • Fonction : Auteur
Jian Li
  • Fonction : Auteur

Résumé

Organic π-conjugated semiconductors (OCSs) have recently emerged as a promising alternative to traditional inorganic materials for photocatalysis. However, the aggregation of OCSs in photocatalytic aqueous solution caused by self-assembly, which closely relates to the photocatalytic activity, has not yet been studied. Here, the relationship between the aggregation of 4,7-Bis(thiophen-2yl) benzothiadiazole (TBT) and the photocatalytic activity was systematically investigated by introducing 2 and varying the position of methyl side chains on the two peripheral thiophene units. Experimental and theoretical results indicated that the introduction of-CH3 group at the 3-position of TBT resulted in the smallest size and best crystallinity of aggregates compared to that of TBT, 4-and 5-positions. As a result, TBT-3 exhibited an excellent photocatalytic activity towards H2 evolution, ascribed to the shorten charge carrier transport distance and solid long-range order. These results suggest the important role of aggregation behavior of OCSs for efficient photocatalysis.
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Dates et versions

hal-04305387 , version 1 (24-11-2023)

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Xiaojiao Yuan, Kunran Yang, Chloé Grazon, Cong Wang, Lorenzo Vallan, et al.. Tuning the Aggregates of Thiophene-based Trimers by Methyl Side-chain Engineering for Photocatalytic Hydrogen Evolution. Angewandte Chemie International Edition, 2023, ⟨10.1002/anie.202315333⟩. ⟨hal-04305387⟩

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