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
Multi-colour circularly polarized luminescence properties of chiral Schiff-base boron difluoride complexes.
TL;DR: In this article , a series of chiral Schiff-base boron difluoride complexes were synthesized and their photophysical properties were examined, including multi-colour (blue, yellow and red) photoluminescence in solution and in the solid state with good emission quantum yield depending on the π-systems of the ligands.
Journal ArticleDOI
Photophysics and photoreactivity of cross-conjugated enediynyl aggregates: Applications to multi-parametric sensing of microheterogeneity and reversible fluorescence switching
TL;DR: In this paper, the photophysics of organic fluorophores composed of benzene, pyrene, naphthalene, and anthracene moieties connected via a Y-shaped enediyne π-spacer in water-acetonitrile solvent mixtures and solid forms were studied.
Journal ArticleDOI
Bridging the gap between H- and J-aggregates: Classification and supramolecular tunability for excitonic band structures in two-dimensional molecular aggregates
TL;DR: In this paper , a unified classification for extended 2D aggregates using temperature dependent peak shifts, thermal broadening, and quantum yields is provided. But the authors do not discuss the properties of these aggregates with J-like absorption spectra.
Journal ArticleDOI
Reversible Supramolecular Polymorphism in Solution and Solid Matrix by Manipulating Sidegroup Conformation.
TL;DR: In this article , a perylene bisimide molecule with trans-azobenzene sidegroup was assembled into three supramolecular polymorphs with distinct colors, morphologies, packing and aggregation mechanism.
Journal ArticleDOI
Simulating the Structure of Carbon Dots via Crystalline π -aggregated Organic Nanodots Prepared by Kinetically Trapped Self-assembly.
Jianye Yang,Like Guo,Xue Yong,Tongjin Zhang,Boyang Wang,Haoqiang Song,Yongsheng Zhao,Hongwei Hou,Bai Yang,Jie Ding,Siyu Lu +10 more
TL;DR: In this paper , a new type of crystalline luminescent organic nanodot was reported by kinetically trapped self-assembly, which was then used as a simplified π-packing model to simulate the structure of CDs.
References
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Detailed Balance Limit of Efficiency of p‐n Junction Solar Cells
TL;DR: In this article, an upper theoretical limit for the efficiency of p−n junction solar energy converters, called the detailed balance limit of efficiency, has been calculated for an ideal case in which the only recombination mechanism of holeelectron pairs is radiative as required by the principle of detailed balance.
Journal ArticleDOI
Coherence in Spontaneous Radiation Processes
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Journal ArticleDOI
Organic Thin Film Transistors for Large Area Electronics
TL;DR: In this article, the authors present new insight into conduction mechanisms and performance characteristics, as well as opportunities for modeling properties of organic thin-film transistors (OTFTs) and discuss progress in the growing field of n-type OTFTs.
Journal ArticleDOI
Charge transport in organic semiconductors.
Veaceslav Coropceanu,Jérôme Cornil,Demetrio A. da Silva Filho,Yoann Olivier,Robert J. Silbey,Jean-Luc Brédas +5 more
TL;DR: Electronic Coupling in Oligoacene Derivatives: Factors Influencing Charge Mobility, and the Energy-Splitting-in-Dimer Method 3.1.