Engineering topics
Miller, Claire E.
Publications and source records attributed to Miller, Claire E..
Singlet Fission within Diketopyrrolopyrrole Nanoparticles in Water
Abstract not provided
Modeling Singlet Fission in Rylene and Diketopyrrolopyrrole Derivatives: The Role of the Charge Transfer State in Superexchange and Excimer Formation
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Direct Observation of a Charge-Transfer State Preceding High-Yield Singlet Fission in Terrylenediimide Thin Films
Singlet exciton fission (SF) in organic chromophore assemblies results in the conversion of one singlet exciton (S 1 ) into two triplet excitons (T 1 ), provided that the overall process is exoergic, i.e., E (S 1 ) > 2 E (T 1 ). In this paper, we report on SF in thin polycrystalline films of two terrylene-3,4:11,12-bis(dicarboximide) (TDI) derivatives 1 and 2 , which crystallize into two distinct π-stacked structures. Femtosecond transient absorption spectroscopy (fsTA) reveals a charge-transfer state preceding a 190% T 1 yield in films of 1 , where the π-stacked TDI molecules are rotated by 23° along an axis perpendicular to their π systems. In contrast, when the TDI molecules are slip-stacked along their N–N axes in films of 2 , fsTA shows excimer formation, followed by a 50% T 1 yield.
Singlet Fission via an Excimer-Like Intermediate in 3,6-Bis(thiophen-2-yl)diketopyrrolopyrrole Derivatives
Abstract not provided
Enabling singlet fission by controlling intramolecular charge transfer in π-stacked covalent terrylenediimide dimers
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