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Long-lived Triplet State Formation Caused by Intramolecular Energy Hopping in Diphenylanthracene Dyads Oriented to Undergo Efficient Triplet–Triplet Annihilation Upconversion

05 October 2020, Version 1
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Triplet–triplet annihilation (TTA)-assisted photon upconversion (TTA-UC) in three dyads (DPA–Cn–DPA), comprised of two diphenylanthracene (DPA) moieties connected by nonconjugated C1, C2, and C3 linkages (Cn), has been investigated. The performance of these dyads as energy acceptors in the presence of the energy donor platinum octaethylporphyrin are characterized by longer triplet lifetimes (τT) and different TTA rate constants than those of the parent DPA. The larger τT of the linked systems, caused by “intramolecular energy hopping” in the triplet dyad 3DPA*–Cn–DPA, results in a low threshold intensity, a key characteristic of efficient TTA-UC.

Keywords

photon upconversion
energy transfer
Transient absorption measurement

Supplementary materials

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20201002 UC si chemrxiv
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Version History

Oct 05, 2020 Version 1

Version Notes

First submission

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The content is available under CC BY NC ND 4.0 [opens in a new tab]

DOI

10.26434/chemrxiv.13027631.v1
D O I: 10.26434/chemrxiv.13027631.v1 [opens in a new tab]

Author’s competing interest statement

No conflict of Interests.

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