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Nicholas J. Hestand
Researcher at University of Chicago
Publications - 25
Citations - 2223
Nicholas J. Hestand is an academic researcher from University of Chicago. The author has contributed to research in topics: Exciton & Intermolecular force. The author has an hindex of 15, co-authored 22 publications receiving 1545 citations. Previous affiliations of Nicholas J. Hestand include Evangel University & University of Pennsylvania.
Papers
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Journal ArticleDOI
Expanded Theory of H- and J-Molecular Aggregates: The Effects of Vibronic Coupling and Intermolecular Charge Transfer.
TL;DR: This review outlines advances made in understanding the relationship between aggregate structure and photophysics when vibronic coupling and intermolecular charge transfer are incorporated.
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Molecular Aggregate Photophysics beyond the Kasha Model: Novel Design Principles for Organic Materials
TL;DR: Interference between the short- and long-range (Coulomb) couplings gives rise to a host of new aggregate types, referred to as HH, HJ, JH, and JJ aggregates, with distinct photophysical properties, which can be exploited for electronic materials design.
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Interference between Coulombic and CT-mediated couplings in molecular aggregates: H- to J-aggregate transformation in perylene-based π-stacks.
TL;DR: Vibronic spectral signatures are developed for integrated Frenkel/CT systems in both the perturbative and resonance regimes and are applied to the reversible H to J-aggregate transformations recently observed in several perylene bisimide systems.
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Polarized Absorption in Crystalline Pentacene: Theory vs Experiment
Nicholas J. Hestand,Hajime Yamagata,Bolei Xu,Dezheng Sun,Yu Zhong,Avetik R. Harutyunyan,Gugang Chen,Hai-Lung Dai,Yi Rao,Frank C. Spano +9 more
TL;DR: In this article, the spectral line shapes for excitation polarized along b and orthogonal to b are analyzed theoretically using a Holstein-like Hamiltonian which includes both Frenkel and charge transfer (CT) excitons represented in a multiparticle basis set.
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Two-dimensional spatial coherence of excitons in semicrystalline polymeric semiconductors: Effect of molecular weight
Francis Paquin,Hajime Yamagata,Nicholas J. Hestand,Maciej Sakowicz,Nicolas Bérubé,Michel Côté,L Reynolds,Saif A. Haque,Natalie Stingelin,Frank C. Spano,Carlos Silva +10 more
TL;DR: In this paper, the authors examined the interplay between extended exciton states delocalized along the polymer backbones and across polymer chains within the $\pi$-stack, depending on the structural development with molecular weight.