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
Molecular polariton electroabsorption
Chiao-Yu Cheng,Nina Krainova,Alyssa N. Brigeman,A. Khanna,Sapana V. Shedge,Christine M. Isborn,Joel Yuen-Zhou,Noel C. Giebink +7 more
TL;DR: In this paper , the authors investigate electroabsorption in organic semiconductor microcavities to understand whether strong light-matter coupling non-trivially alters their nonlinear optical response.
Journal ArticleDOI
A2BC-Type Porphyrin SAM on Gold Surface for Bacteria Detection Applications: Synthesis and Surface Functionalization
Laurie Neumann,Lea Könemund,Valentina Rohnacher,Annemarie Pucci,Hans-Hermann Johannes,Wolfgang Kowalsky +5 more
TL;DR: In this paper, a porphyrin for self-assembled monolayers (SAMs) formation on a gold surface as an electrode material was used for the detection of bacteria.
Journal ArticleDOI
Cucurbit[7]uril Complexation of Near-Infrared Fluorescent Azobenzene-Cyanine Conjugates
TL;DR: Two new azobenzene heptamethine cyanine conjugates exist as dispersed monomeric molecules in methanol solution and exhibit near-infrared (NIR) cyanine absorption and fluorescence, and the addition of cucurbit[7]uril (CB7) induces dye deaggregation and a large increase in cyanine NIR fluorescence emission intensity.
Journal ArticleDOI
Investigation of Intermetallic Energy Transfers in Lanthanide Coordination Polymers Molecular Alloys: Case Study of Trimesate-Based Compounds.
Chloé Blais,Carole Daiguebonne,Yan Suffren,Kevin Bernot,Guillaume Calvez,Laurent Le Pollès,Claire Roiland,Stéphane Freslon,Olivier Guillou +8 more
TL;DR: In this paper , the random distribution of the lanthanide ions over the metallic sites has been investigated using 89Y and 139La solid-state NMR spectroscopy experiments.
Journal ArticleDOI
Near-infrared absorbing hydrogen-bonded dithioketopyrrolopyrrole (DTPP) n-type semiconductors
TL;DR: In this paper , the optical and semiconducting properties of vacuum-deposited thin films of four hydrogen-bonded pigments were studied, and the lowest optical band-gap among the pigments under study was found to be 1.4 eV for Ph-DTPP thin film, while a signature of high-lying n-orbital was detected through nπ* transition in the far-red/near-infrared area of absorption spectra, interpreted with help of time dependent DFT calculations on monomer and stacked dimer geometry.
References
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Journal ArticleDOI
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.
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Organic Thin Film Transistors for Large Area Electronics
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Journal ArticleDOI
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