[1]Benzothieno[3,2-b][1]benzothiophene-based dyes: effect of the ancillary moiety on mechanochromism and aggregation-induced emission
Physical Chemistry Chemical Physics, ISSN: 1463-9076, Vol: 24, Issue: 24, Page: 15110-15120
2022
- 8Citations
- 7Captures
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Metrics Details
- Citations8
- Citation Indexes8
- CrossRef7
- Captures7
- Readers7
Article Description
It is an established fact that [1]benzothieno[3,2-b][1]benzothiophene (BTBT) is a champion molecule for high-mobility OFET devices. Recently, it has also been utilized in dye-sensitized solar cells (DSSCs) and organic photovoltaics (OPVs) as an alternative to fullerene (non-fullerene acceptor). Considering the advantageous features of BTBT, we herein report its aggregation-induced emission (AIE) and mechanofluorochromic (MFC) behaviour for the first time. We have designed and synthesized two new BTBT derivatives: [1]benzothieno[3,2-b][1]benzothiophene-tetraphenylethylene (BTBT-TPE) and [1]benzothieno[3,2-b][1]benzothiophene-phenyl-N,N-dimethylamine (BTBT-NMe). The donor-π-acceptor-π-donor-integrated BTBT-TPE showed AIE whereas BTBT-NMe showed aggregation-caused quenching (ACQ), as evident by their quantum yield and lifetime results. BTBT-NMe was found to possess great interaction, resulting in the halochromic (protonation) effect. The theoretical calculation of the electronic distribution and energy investigation were consistent with the experimental outcomes. The electron contribution of the HOMO is high for BTBT-NMe at the donor, which can be attributed to the weaker donating nature of TPE compared to that of the NMe group. Overall, the results indicate the potential of the mechanical stimuli and aggregation response of the studied compounds for further investigation.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85132235321&origin=inward; http://dx.doi.org/10.1039/d2cp01934e; http://www.ncbi.nlm.nih.gov/pubmed/35699113; https://xlink.rsc.org/?DOI=D2CP01934E; https://dx.doi.org/10.1039/d2cp01934e; https://pubs.rsc.org/en/content/articlelanding/2022/cp/d2cp01934e
Royal Society of Chemistry (RSC)
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