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Band Gap Control in Conjugated Oligomers via Lewis Acids
Abstract
A simple and effective strategy for optical band gap control is demonstrated through the use of a novel small acceptor/donor/acceptor molecule, 1, and group-13 Lewis acids. Chromophore 1 contains a dithienolesilole donor unit end-capped with benzo-2,1,3-thiadiazole (BT) acceptor units. Addition to 1 of stoichiometeric quantities of Lewis acids of varying strength resulted in the formation of Lewis adducts with progressively red-shifted primary charge-transfer absorption bands. These complexes have absorption spectra that approach those of known conjugated copolymers containing related units. NMR spectroscopy and X-ray diffraction studies revealed that 1 binds 2 equiv of Lewis acid via the nitrogen at the 3-position of BT.
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“Optical properties of an A-D-A chromophore with CT character has been tuned simply by a complexation of Lewis acid to a basic site of the π-delocalized framework.70”
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Metadata
- Authors
- Welch, G. C., Coffin, R., Peet, J., & Bazan, G. C.
- Affiliations
- University of California, Santa Barbara (US)
- Corresponding author
- Bazan, Guillermo C.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-07-08
- Volume
- 131
- Issue
- 31
- Pages
- 10802-10803
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W1978926229
- Cited by
- 159
- References
- 24
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 8 · 2023: 11 · 2022: 11 · 2021: 7 · 2020: 10 · 2019: 12 · 2018: 11 · 2017: 6 · 2016: 12 · 2015: 13 · 2014: 9 · 2013: 9 · 2012: 12
- FWCI
- 9.52
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of the American Chemical Society (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Electronics and Photovoltaics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Light-Emitting Diodes Research
- Physical Sciences › Chemistry › Organic Chemistry › Organoboron and organosilicon chemistry
- Keywords
- conjugated oligomers, Lewis acid adducts, benzo[2,1,3]thiadiazole, charge-transfer absorption, bathochromic shift, conjugated copolymers
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