R
Ryan M. Young
Researcher at Northwestern University
Publications - 150
Citations - 4543
Ryan M. Young is an academic researcher from Northwestern University. The author has contributed to research in topics: Excited state & Chemistry. The author has an hindex of 32, co-authored 124 publications receiving 3224 citations. Previous affiliations of Ryan M. Young include University of California, Berkeley & Lawrence Berkeley National Laboratory.
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Enabling singlet fission by controlling intramolecular charge transfer in π -stacked covalent terrylenediimide dimers
Eric A. Margulies,Claire E. Miller,Yilei Wu,Lin Ma,George C. Schatz,Ryan M. Young,Michael R. Wasielewski +6 more
TL;DR: A series of covalently bound π-stacked terrylenediimide dimers have been studied to elucidate the role of interchromophore charge-transfer states in the mechanism of singlet fission, and show that adjusting the charge- transfer-state energy relative to those of the exciton states can serve to either inhibit or promote singletfission.
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Unified model for singlet fission within a non-conjugated covalent pentacene dimer
Bettina S. Basel,Johannes Zirzlmeier,Constantin Hetzer,Brian T. Phelan,Matthew D. Krzyaniak,S. Rajagopala Reddy,Pedro B. Coto,Noah E. Horwitz,Ryan M. Young,Fraser J. White,Frank Hampel,Timothy Clark,Michael Thoss,Rik R. Tykwinski,Michael R. Wasielewski,Dirk M. Guldi +15 more
TL;DR: The use of time-resolved optical and electron paramagnetic resonance spectroscopy is used to probe singlet fission in a pentacene dimer linked by a non-conjugated spacer and a single kinetic model is developed that describes the data over seven temporal orders of magnitude both at room and cryogenic temperatures.
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Supramolecular Explorations: Exhibiting the Extent of Extended Cationic Cyclophanes
Edward J. Dale,Nicolaas A. Vermeulen,Michal Juríček,Jonathan C. Barnes,Ryan M. Young,Michael R. Wasielewski,J. Fraser Stoddart +6 more
TL;DR: This Account serves as an exploration of the properties that emerge from these structural modifications of the pyridinium-based hosts, coupled with a call for further investigation into the wealth of properties inherent in this class of compounds.
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Direct Observation of Ultrafast Excimer Formation in Covalent Perylenediimide Dimers Using Near-Infrared Transient Absorption Spectroscopy
TL;DR: Femtosecond near-infrared transient absorption experiments reveal a unique low-energy transition that can be used to identify and characterize this state without overlapping excited singlet-state absorption.
Journal ArticleDOI
Direct Observation of a Charge-Transfer State Preceding High-Yield Singlet Fission in Terrylenediimide Thin Films
Eric A. Margulies,Jenna L. Logsdon,Claire E. Miller,Lin Ma,Ethan Simonoff,Ryan M. Young,George C. Schatz,Michael R. Wasielewski +7 more
TL;DR: Femtosecond transient absorption spectroscopy reveals a charge-transfer state preceding a 190% T1 yield in films of 1, where the π-stacked TDI molecules are rotated by 23° along an axis perpendicular to their π systems, while fsTA shows excimer formation, followed by a 50% T2 yield.