Article
Multidisciplinary Sciences
Xian'e Li, Qilun Zhang, Jianwei Yu, Ye Xu, Rui Zhang, Chuanfei Wang, Huotian Zhang, Simone Fabiano, Xianjie Liu, Jianhui Hou, Feng Gao, Mats Fahlman
Summary: Energy level alignment at donor-acceptor heterojunctions is crucial for charge generation and recombination in organic photovoltaic devices. This study systematically investigates the energy level alignment and its variation at different interfaces. Contrary to previous assumptions, significant vacuum level shifts are observed at the interfaces, resulting in reduced interfacial energetic offsets and increased charge transfer state energies.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Maximilian Raisch, Wafa Maftuhin, Michael Walter, Michael Sommer
Summary: By designing a mechanochromic donor-acceptor torsional spring, force-dependent red-shifted absorption and emission spectra can be achieved, allowing for sensing and measuring forces, as well as visualizing force distributions in materials.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Brigitte A. G. Lamers, Martin H. C. van Son, Freek de Graaf, Bart W. L. van den Bersselaar, Bas F. M. de Waal, Kazuki Komatsu, Hiroshi Sato, Takuzo Aida, Jose Augusto Berrocal, Anja R. A. Palmans, Ghislaine Vantomme, Stefan C. J. Meskers, E. W. Meijer
Summary: The assembly of highly ordered nanomaterials through charge transfer interactions is achieved in this study, where pyrene and naphthalenediimide functionalized oligodimethylsiloxanes are synthesized and co-assembled in bulk. By tuning the donor-acceptor interactions through connecting pyrene and NDI to the same oligomer or to two separate oligomers, different types of donor-acceptor molecules are obtained. The discreet length of the oligodimethylsiloxane units plays a crucial role in the formation of liquid crystalline materials and CT dimers.
MATERIALS HORIZONS
(2022)
Review
Chemistry, Multidisciplinary
Hui-Ying Liu, Ya-Cheng Li, Xue-Dong Wang
Summary: Organic donor-acceptor (D-A) cocrystals have gained attention for their blending properties and are potential materials for optoelectronic applications. However, the rational design and selection of components in organic cocrystals with desired properties remains a challenge.
Review
Chemistry, Organic
Zhonglie Yang, Yutong Liu, Kun Cao, Xiaobin Zhang, Hezhong Jiang, Jiahong Li
Summary: The electron-donor-acceptor (EDA) complex, formed by dipole-dipole interactions between an electron donor and an electron acceptor, can be transformed into the excited state upon light irradiation, leading to electron transfer and subsequent reactions. Reactions involving EDA complexes are typically mild and do not require transition metal catalysts or photosensitizers, aligning with the principles of green chemistry.
BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Polymer Science
Shiwei Ren, Zhuoer Wang, Wenqing Zhang, Yubing Ding, Zhengran Yi
Summary: In this study, a polymer with a donor-acceptor structure was designed and prepared, and its potential as a p-type material for organic field-effect transistor (OFET) applications was tested using a solution-processing method. The polymer exhibited high molecular weights and thermodynamic stability, making it a promising material for potential organic electronics applications.
Article
Polymer Science
Anna Grobelny, Karolina Lorenc, Lucja Skowron, Szczepan Zapotoczny
Summary: This study presents a new method for synthesizing ladder-like donor-acceptor polymer brushes, achieving proper arrangement of pendant donor and acceptor groups through alternating copolymerization. Dense brushes can be obtained in a single polymerization process without the use of toxic metal catalysts or bulky substituents.
Review
Chemistry, Multidisciplinary
Meera Madhu, Remya Ramakrishnan, Vishnu Vijay, Mahesh Hariharan
Summary: This review discusses the recent advancements in hierarchical organization of molecular building blocks for improved photoconversion in organic solar cells. The self-sorted donor-on-donor/acceptor-on-acceptor arrangements have shown enhanced charge separation efficiency through ultrafast excited state dynamics. The controlled interface and electronic coupling between covalently linked donors and acceptors provide better charge carrier generation efficiency and offer new possibilities for functional supramolecular architectures.
Article
Chemistry, Multidisciplinary
Anurag Mukherjee, Shubhankar Barman, Anupam Ghosh, Ayan Datta, Anuja Datta, Suhrit Ghosh
Summary: This study investigates the co-assembly of an electron-deficient naphthalene-diimide (NDI)-appended polyurethane (P1) and electron-rich pyrene (Py), forming an organogel with prominent room-temperature ferroelectricity. The assembly allows slow crystallization of the peripheral hydrocarbons through charge-transfer (CT) interaction, resulting in gelation with a nanotubular morphology.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Shuaishuai Yan, Zhan Wang, Fengxiang Liu, Hangyu Zhou, Kai Liu
Summary: A supramolecular polyurethane material reinforced by aromatic donor-acceptor (D-A) charge-transfer interactions is utilized as an electrolyte matrix with high stiffness, excellent toughness, and unique mechanical energy dissipation capacity. The optimized electrolyte network can dynamically adapt to the volume fluctuating Li metal and, importantly, eliminate stress-concentrating behavior under the deformed state. This study highlights the importance of the comprehensive mechanical properties of polymer electrolytes and the stable electrolyte/electrode interface for high-performance solid-state lithium metal batteries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Peihui Li, Wan Xiong, Jinying Wang, Jie Hao, Mingpeng Li, Boyu Wang, Yijian Chen, Wei Si, Haiyang Ren, Guangwu Li, Yongsheng Chen, Jingtao Lu, Hongtao Zhang, Chuancheng Jia, Xuefeng Guo
Summary: The electronic characteristics of organic optoelectronic materials play a crucial role in determining the performance of related devices, particularly in organic photovoltaics. This study investigates a typical acceptor-donor-acceptor (A-D-A)-type molecule to understand its inherent electronic characteristics at the single-molecule level. The presence of 1,1-dicyano methylene-3-indanone (INCN) acceptor units in the A-D-A-type molecule enhances its conductance in single-molecule junctions by providing additional transport channels. Protonation-induced conformational changes allow for detection of charge transport in the central part of the D unit, confirming that the conductive orbitals contributed by the INCN acceptor groups can penetrate the entire A-D-A molecule. These findings offer important insights for the development of high-performance organic optoelectronic materials and devices for practical applications.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chen Lu, Eunkyung Cho, Zhiyuan Cui, Yuhang Gao, Wenjuan Cao, Jean-Luc Bredas, Veaceslav Coropceanu, Feng Li
Summary: In contrast to closed-shell luminescent molecules, organic luminescent radicals have both spin doublet electronic states, resulting in spin-allowed radiative transitions. The efficiency and stability of donor-acceptor (D-A center dot) type luminescent radicals, which have a donor group covalently attached to an electron-withdrawing radical core, remain challenging to define. Experimental and theoretical results suggest that the luminescence efficiency and stability of the radicals are determined by the degree of conjugation and the number of imine nitrogen atoms in the substituents, with higher conjugation and lower number of imine nitrogen atoms leading to higher efficiency and stability.
ADVANCED MATERIALS
(2023)
Article
Polymer Science
Justus P. Wesseler, Grant M. Cameron, Peter A. G. Cormack, Nico Bruns
Summary: Polymers with donor-acceptor Stenhouse adducts (DASAs) are important light-responsive materials that can undergo reversible isomerization under visible light. This allows for on-demand property changes in a non-invasive manner. The incorporation of DASAs into crosslinked polymer networks is explored in this study, specifically in styrene-divinylbenzene-based polymer microspheres. The DASA-functionalized microspheres showed significant changes in their properties upon irradiation, making them suitable for applications in various fields.
Review
Chemistry, Multidisciplinary
Leendert van Dalsen, Rachel E. Brown, James A. Rossi-Ashton, David J. Procter
Summary: The photoactivation of electron donor-acceptor complexes is a sustainable and versatile strategy for generating radicals. However, the electronic constraints of the donor and acceptor components can limit the range of radicals that can be generated. By using sulfonium salts in electron donor-acceptor complexation, radicals can now be generated from native functionality. This approach relaxes the electronic constraints and expands the range of radicals that can be generated.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Xin Chang, Mohammad Balooch Qarai, Frank C. Spano
Summary: A vibronic exciton model was developed to explain the spectral signatures of HJ-aggregates in oligomers and polymers with donor-acceptor-donor repeat units. The model shows that single chains with enhanced intrachain order exhibit J-behavior, while positive H-promoting interchain Coulomb interactions in aggregates attenuate the vibronic ratio. The ratio formula derived previously for P3HT aggregates was shown to also apply to (DAD)(N) aggregates with slight modifications.
JOURNAL OF CHEMICAL PHYSICS
(2021)