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
Aggregates of polar dyes: beyond the exciton model
Mattia Anzola,Anna Painelli +1 more
TL;DR: In this paper, the physics of aggregates of polar and polarizable donor-acceptor dyes are discussed, extending a previous model to account for the coupling of electronic and vibrational degrees of freedom.
Journal ArticleDOI
Novel homo Yin-Yang probes improve sensitivity in RT-qPCR detection of low copy HIV RNA.
Valentina M. Farzan,Maksim V. Kvach,Ilya O. Aparin,Kireev De,Tatiana Prikazchikova,Alexey V. Ustinov,Vadim V. Shmanai,German A. Shipulin,Vladimir A. Korshun,Timofei S. Zatsepin,Timofei S. Zatsepin +10 more
TL;DR: It is demonstrated that fluorescence quenching by formation of the homo dimer exciton in such molecular beacons allows using them in homogeneous assays and for detection of low copy HIV RNA by RT-qPCR.
Journal ArticleDOI
Oblique Packing and Tunable Excitonic Coupling in DNA‐Templated Squaraine Rotaxane Dimer Aggregates
Matthew S. Barclay,Christopher K. Wilson,Simon K. Roy,Olga Mass,Olena M. Obukhova,Rostyslav P. Svoiakov,Anatoliy L. Tatarets,Azhad U. Chowdhury,Jonathan S. Huff,Daniel B. Turner,Paul H. Davis,Ewald Terpetschnig,Bernard Yurke,William B. Knowlton,Jeunghoon Lee,Ryan D. Pensack +15 more
TL;DR: In this paper , it is shown that it is possible to obtain an elusive oblique packing arrangement by using DNA to bring squaraine rotaxanes into close proximity, and that further fine tuning excitonic interactions is possible via synthetic modifications of the rotaxane.
Journal ArticleDOI
The Impact of Aggregation of Quaterthiophenes on the Excited State Dynamics.
TL;DR: In this paper, the authors controlled the degree of aggregation of 2,2':5',2″:5'',2''-quaterthiophene (QTH) to shed light on the impact of the aggregation on the excited state dynamics.
Book ChapterDOI
Photofunctions of Dye-Clay Hybrids: Recent Developments
TL;DR: In this article, the precise design of hybrid nanostructures based on dyes in hybrid materials toward controlled photochemical reactions and novel photoinduced phenomena is overviewed with the emphasis on the recent developments.
References
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Journal ArticleDOI
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