The spectral complexity shown by conjugated polymers has been explained by interactions between chromophores in tangled chains, but experiments on model oligomers reveal that it may arise from the chromophores themselves.
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Schwartz, B. What makes a chromophore?. Nature Mater 7, 427–428 (2008). https://doi.org/10.1038/nmat2191
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DOI: https://doi.org/10.1038/nmat2191
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