AI Article Synopsis
- Strong dipole-dipole coupling in π-conjugated segments influences electronic transitions, alters vibronic coupling, and extends excited-state lifetimes.
- Competing J-type and H-type coupling in conjugated-polymers complicates the observation of spectral modifications as they merge in the ensemble.
- The introduction of a single-molecule H-type aggregate with adjustable spacing allows for clearer visualization of HJ-type aggregate formation through the scattering of single-molecule spectra.
Article Abstract
Strong dipole-dipole coupling within and between π-conjugated segments shifts electronic transitions, and modifies vibronic coupling and excited-state lifetimes. Since J-type coupling between monomers along the conjugated-polymer (CP) chain and H-type coupling of chromophores between chains of a CP compete, a superposition of the spectral modifications arising from each type of coupling emerges, making the two couplings hard to discern in the ensemble. We introduce a single-molecule H-type aggregate of fixed spacing and variable length of up to 10 nm. HJ-type aggregate formation is visualized intuitively in the scatter of single-molecule spectra.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6973276 | PMC |
| http://dx.doi.org/10.1002/anie.201912374 | DOI Listing |
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