Evidence map›Paper›PMID 31406323›Full record

ArticleNature chemistry2019

Ultra-fast intramolecular singlet fission to persistent multiexcitons by molecular design.

Andrew B Pun, Amir Asadpoordarvish, Elango Kumarasamy, Murad J Y Tayebjee, Daniel Niesner, Dane R McCamey, Samuel N Sanders, Luis M Campos, Matthew Y Sfeir

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Article in Nature chemistry, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

31 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Andrew B PunDepartment of Chemistry, Columbia University, NewYork, NY, USA.
Amir AsadpoordarvishARC Centre of Excellence in Exciton Science, School of Physics, University of New South Wales, Sydney, New South Wales, Australia.ORCID http://orcid.org/0000-0002-6056-9616
Elango KumarasamyDepartment of Chemistry, Columbia University, NewYork, NY, USA.
Murad J Y TayebjeeCavendish Laboratory, University of Cambridge, Cambridge, UK.ORCID http://orcid.org/0000-0001-5639-027X
Daniel NiesnerDepartment of Chemistry, Columbia University, NewYork, NY, USA.
Dane R McCameyARC Centre of Excellence in Exciton Science, School of Physics, University of New South Wales, Sydney, New South Wales, Australia.ORCID http://orcid.org/0000-0001-7727-6804
Samuel N SandersDepartment of Chemistry, Columbia University, NewYork, NY, USA. sanders@rowland.harvard.edu.
Luis M CamposDepartment of Chemistry, Columbia University, NewYork, NY, USA. lcampos@columbia.edu.
Matthew Y SfeirCenter for Functional Nanomaterials, Brookhaven National Laboratory, Upton, MA, USA. msfeir@gc.cuny.edu.ORCID http://orcid.org/0000-0001-5619-5722

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Singlet fission-that is, the generation of two triplets from a lone singlet state-has recently resurfaced as a promising process for the generation of multiexcitons in organic systems. Although advances in this area have led to the discovery of modular classes of chromophores, controlling the fate of the multiexciton states has been a major challenge; for example, promoting fast multiexciton generation while maintaining long triplet lifetimes. Unravelling the dynamical evolution of the spin- and energy conversion processes from the transition of singlet excitons to correlated triplet pairs and individual triplet excitons is necessary to design materials that are optimized for translational technologies. Here, we engineer molecules featuring a discrete energy gradient that promotes the migration of strongly coupled triplet pairs to a spatially separated, weakly coupled state that readily dissociates into free triplets. This 'energy cleft' concept allows us to combine the amplification and migration processes within a single molecule, with rapid dissociation of tightly bound triplet pairs into individual triplets that exhibit lifetimes of ~20 µs.

Identifiers

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.