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
Effect of H- and J-Aggregation on the Photophysical and Voltage Loss of Boron Dipyrromethene Small Molecules in Vacuum-Deposited Organic Solar Cells.
Tian-Yi Li,Tian-Yi Li,Johannes Benduhn,Zhi Qiao,Yuan Liu,Yue Li,Rishi Shivhare,Frank Jaiser,Pei Wang,Jie Ma,Olaf Zeika,Dieter Neher,Stefan C. B. Mannsfeld,Zaifei Ma,Koen Vandewal,Karl Leo +15 more
TL;DR: Two NIR boron dipyrromethene (BODIPY) molecules are characterized for application in planar (PHJ) and bulk (BHJ) heterojunction OSCs and find that when two H atoms are substituted by F atoms on the peripheral phenyl rings of the molecules, the molecular aggregation type in the thin film changes from the H-type to J-type.
Journal ArticleDOI
Photophysics of J-Aggregating Porphyrin-Lipid Photosensitizers in Liposomes: Impact of Lipid Saturation
Danielle M. Charron,Danielle M. Charron,Goonay Yousefalizadeh,Hilde Harb Buzzá,Maneesha A Rajora,Maneesha A Rajora,Juan Chen,Kevin G. Stamplecoskie,Gang Zheng,Gang Zheng +9 more
TL;DR: A porphyrin-lipid conjugate was incorporated into liposomes formed of saturated or unsaturated lipids to study the membrane composition-dependent formation of highly ordered porphirin J-aggregates and disordered aggregates.
Journal ArticleDOI
Cocrystallization Tailoring Multiple Radiative Decay Pathways for Amplified Spontaneous Emission.
Geetha Bolla,Qing Liao,Saeed Amirjalayer,Zeyi Tu,Shaokai Lv,Jie Liu,Shuai Zhang,Yonggang Zhen,Yuanping Yi,Xinfeng Liu,Hongbing Fu,Harald Fuchs,Huanli Dong,Zhaohui Wang,Wenping Hu,Wenping Hu,Wenping Hu +16 more
TL;DR: The results suggest that cocrystallization presents a powerful approach to tailor the radiative decay pathways, which is fundamentally important to the development of organic ASE and lasing materials.
Journal ArticleDOI
Graphene quantum dots induced porous orientation of holey graphene nanosheets for improved electrocatalytic activity
TL;DR: In this article, the potential of nitrogen-doped graphene quantum dots (NGQDs) to induce 3D porous orientation of holey graphene oxide (hGO) nanosheets was explored.
Journal ArticleDOI
Double helical π-aggregate nanoarchitectonics for amplified circularly polarized luminescence
TL;DR: In this paper , a selective-recognized and chirality-matched co-assembly strategy for the fabrication of fluorescent π-amino acids into double helical πaggregates, which show exceptional strong circularly polarized luminescence (CPL), was reported.
References
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Journal ArticleDOI
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