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Pentacene Dimers as a Critical Tool for the Investigation of Intramolecular Singlet Fission

Pentacene Dimers as a Critical Tool for the Investigation of Intramolecular Singlet Fission

Constantin Hetzer, Dirk M Guldi, Rik R Tykwinski

Chemistry. 2018 Jun 12;24(33):8245-8257.

PMID: 29323762

Abstract:

Singlet fission (SF) involves the spontaneous splitting of a photoexcited singlet state into a pair of triplets, and it holds great promise toward the realization of more efficient solar cells. Although the process of SF has been known since the 1960s, debate regarding the underlying mechanism continues to this day, especially for molecular materials. A number of different chromophores have been synthesized and studied in order to better understand the process of SF. These previous reports have established that pentacene and its derivatives are especially well-suited for the study of SF, since the energetic requirement E(S1 )≥2E(T1 ) is fulfilled rendering the process exothermic and unidirectional. Dimeric pentacene derivatives, in which individual pentacene chromophores are tethered by a "spacer", have emerged as the system of choice toward exploring the mechanism of intramolecular singlet fission (iSF). The dimeric structure, and in particular the spacer, allows for controlling and tuning the distance, geometric relationship, and electronic coupling between the two pentacene moieties. This Minireview describes recent advances using pentacene dimers for the investigation of iSF.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP135488	Pentacene		135-48-8	Price

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