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 Article
Measurement and Theoretical Interpretation of Exciton Diffusion as a Function of Intermolecular Separation for Squaraines Targeted for Bulk Heterojunction Solar Cells
Chenyu Zheng,Michael F. Mark,Tyler Wiegand,Steven A. Diaz,Jeremy A. Cody,Frank C. Spano,David W. McCamant,Christopher J. Collison +7 more
TL;DR: In this paper, sub-picosecond transient absorption (TA) data were used to probe the excited-state photophysics of samples with a continuum of intermolecular separation, from monomers in solution to high-concentration solid solution thin films analogous to OPV active layers.
Journal ArticleDOI
A H-aggregating fluorescent probe for recognizing both mercury and copper ions based on a dicarboxyl-pyridyl bifunctionalized difluoroboron dipyrromethene
TL;DR: An interesting dicarboxyl-pyridyl functionalized difluoroboron dipyrromethene dye probe (2,6-diCO2H-BODIPY) was successfully fabricated and characterized, exhibiting a remarkable dual-responsive fluorescence sensitivity for recognizing both Hg2+ and Cu2+ ions based on the ion-induced Haggregation as mentioned in this paper.
Journal ArticleDOI
Photoisomerization of Enediynyl Linker Leads to Slipped Cofacial Hydroporphyrin Dyads with Strong Through-Bond and Through-Space Electronic Interactions
TL;DR: Dyads reported here represent a novel type of photoactive arrays with various modes of electronic interactions between chromophores, and combining through-bond and through-space coupling appears to be a viable strategy to engineer novel optical and photochemical properties in organic conjugated materials.
Journal ArticleDOI
Synthesis of near-infrared absorbing and fluorescent bis(pyrrol-2-yl)squaraines and their halochromic properties
Yasuhiro Kubota,Masato Nakazawa,Junheon Lee,Ryoma Naoi,Motoki Tachikawa,Toshiyasu Inuzuka,Kazumasa Funabiki,Masaki Matsui,Taekyeong Kim +8 more
TL;DR: In this article, a reusable acid gas sensing textile sensor was fabricated using 1,3 and 1,2-Bis(pyrrol-2-yl)squaraines.
Journal ArticleDOI
Design Concepts for Solution and Solid‐State Emitters – A Modern Viewpoint on Classical and Non‐Classical Approaches
TL;DR: In this article, the authors present an overview of published structural features of solid-state emitters (SSSEs) while shining light on design concepts from a more generalized perspective, aiming to give future scientists a versatile tool in hand to efficiently design novel luminescent materials.
References
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Organic Thin Film Transistors for Large Area Electronics
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Journal ArticleDOI
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