Journal ArticleDOI
Expanded Theory of H- and J-Molecular Aggregates: The Effects of Vibronic Coupling and Intermolecular Charge Transfer.
TLDR
This review outlines advances made in understanding the relationship between aggregate structure and photophysics when vibronic coupling and intermolecular charge transfer are incorporated.Abstract:
The electronic excited states of molecular aggregates and their photophysical signatures have long fascinated spectroscopists and theoreticians alike since the advent of Frenkel exciton theory almost 90 years ago. The influence of molecular packing on basic optical probes like absorption and photoluminescence was originally worked out by Kasha for aggregates dominated by Coulombic intermolecular interactions, eventually leading to the classification of J- and H-aggregates. This review outlines advances made in understanding the relationship between aggregate structure and photophysics when vibronic coupling and intermolecular charge transfer are incorporated. An assortment of packing geometries is considered from the humble molecular dimer to more exotic structures including linear and bent aggregates, two-dimensional herringbone and “HJ” aggregates, and chiral aggregates. The interplay between long-range Coulomb coupling and short-range charge-transfer-mediated coupling strongly depends on the aggregate ...read more
Citations
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Journal ArticleDOI
Optical properties of molecular nanocrystals consisting of J-aggregates of anionic and cationic cyanine dyes.
TL;DR: Investigations of the photoelectric properties of multichromic crystals have shown that each of them can potentially be used as a photosensitive layer of a photocell with photoconductivity in three peaks of excitonic absorption.
Journal ArticleDOI
Vapochromic Luminescent π-Conjugated Systems with Reversible Coordination-Number Control of Hypervalent Tin(IV)-Fused Azobenzene Complexes.
TL;DR: In this article, the dynamic and reversible changes of coordination numbers between five and six in solution and solid states, based on hypervalent tin(IV)-fused azobenzene (TAz) complexes, are reported.
Journal ArticleDOI
Aggregation-Dependent Chromism and Photopolymerization of Aminoanthraquinone-Substituted Diacetylenes
Journal ArticleDOI
Organic J-Aggregate Nanodots with Enhanced Light Absorption and Near-Unity Fluorescence Quantum Yield.
TL;DR: In this article, a donor-acceptor-donor type organic molecule consisting of a carbazole (Cz) donor and benzothiazole (BT) acceptor assembles into quasi-crystalline J-aggregates upon a formation of ultrasmall nanoparticles.
Journal ArticleDOI
Steering the multiexciton generation in slip-stacked perylene dye array via exciton coupling
Yongseok Hong,Maximilian Rudolf,Mun-Young Kim,Juno Kim,Tim Schembri,Ana-Maria Krause,Kazutaka Shoyama,David Bialas,Merle I. S. Röhr,Taiha Joo,Hyungjun Kim,Dongho Kim,Frank Würthner +12 more
TL;DR: In this article , a slip-stacked perylene bisimide trimer is presented to investigate singlet fission (SF) mechanisms in dye arrays, and the authors highlight multiple pathways towards the multiexciton state through direct or excimer-mediated mechanisms by depending upon interchromophoric interaction.
References
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Organic Thin Film Transistors for Large Area Electronics
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Journal ArticleDOI
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