Molecular Encapsulation of Naphthalene Diimide (NDI) Based π-Conjugated Polymers: A Tool for Understanding Photoluminescence.
Angew Chem Int Ed Engl
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Royakkers, J., Guo, K., Toolan, D. T., Feng, L., Minotto, A., Congrave, D., Danowska, M., et al. (2021). Molecular Encapsulation of Naphthalene Diimide (NDI) Based π-Conjugated Polymers: A Tool for Understanding Photoluminescence.. Angew Chem Int Ed Engl, 60 (47), 25005-25012. https://doi.org/10.1002/anie.202110139
Funder: Royal Society; Id: http://dx.doi.org/10.13039/501100000288
Funder: Winton Programme for the Physics of Sustainability
Conjugated polymers are an important class of chromophores for optoelectronic devices. Understanding and controlling their excited state properties, in particular, radiative and non-radiative recombination processes are among the greatest challenges that must be overcome. We report the synthesis and characterization of a molecularly encapsulated naphthalene diimide-based polymer, one of the most successfully used motifs, and explore its structural and optical properties. The molecular encapsulation enables a detailed understanding of the effect of interpolymer interactions. We reveal that the non-encapsulated analogue P(NDI-2OD-T) undergoes aggregation enhanced emission; an effect that is suppressed upon encapsulation due to an increasing π-interchain stacking distance. This suggests that decreasing π-stacking distances may be an attractive method to enhance the radiative properties of conjugated polymers in contrast to the current paradigm where it is viewed as a source of optical quenching.
Research Article, Research Articles, conjugated polymers, encapsulation, macrocycles, organic electronics, photoluminescence
Engineering and Physical Sciences Research Council (EP/P007767/1)
Engineering and Physical Sciences Research Council (EP/S003126/1)
Qatar Foundation for Education, Science and Community Development (NPRP12S-0304--190227)
External DOI: https://doi.org/10.1002/anie.202110139
This record's URL: https://www.repository.cam.ac.uk/handle/1810/330427