Article
Polymer Science
Patrick H. Maag, Florian Feist, Hendrik Frisch, Peter W. Roesky, Christopher Barner-Kowollik
Summary: Fluorescent and catalytically active single chain nanoparticle (SCNP) systems can visualize and trace the distribution of catalysts in a reaction system. This study presents a synthetic strategy to produce such SCNPs through a photoactivated reaction under visible light. The compaction of SCNPs is achieved by generating a fluorescent entity, demonstrating a successful reduction in the size of the nanoparticles.
Review
Chemistry, Multidisciplinary
Xiaoxiao Cheng, Tengfei Miao, Yafei Ma, Wei Zhang
Summary: This review discusses the chiral self-assembly of polymers in dispersion systems and its impact on polymer properties. By comparing traditional post-polymerization self-assembly and in situ PISA strategies, chirality control in polymers is predicted and advanced.
Article
Chemistry, Multidisciplinary
Hongbin Chen, Zhe Zhang, Peiran Wang, Yunxin Zhang, Kangqiao Ma, Yi Lin, Tainan Duan, Tengfei He, Zaifei Ma, Guankui Long, Chenxi Li, Bin Kan, Zhaoyang Yao, Xiangjian Wan, Yongsheng Chen
Summary: Compared to linear NFAs, multi-dimensional NFAs with extended conjugated structures in multiple directions show potential for improving absorption, molecular packing, and charge transport dynamics in organic solar cells. In this study, a conjugated-skeleton connection mode is developed, extending linear molecular structures towards three-dimensions. The resulting 3D NFAs exhibit low reorganization energy, fibrillar network film morphology, enhanced charge transport behavior, and improved stability. By optimizing the molecular geometry using fluorine-induced noncovalent conformational locks, a remarkable efficiency of 17.05% is achieved in binary bulk-heterojunction OSCs based on CH8-1, which represents the highest value for multi-dimensional acceptors to date. This work paves the way for further molecular structural optimization of state-of-the-art NFAs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Kai Mundsinger, Aidan Izuagbe, Bryan T. Tuten, Peter W. Roesky, Christopher Barner-Kowollik
Summary: This article highlights the recent progress in catalytically active SCNPs, a macromolecular material that can be customized in terms of morphology and function for various applications. This versatile catalyst shows great potential in different fields.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Physical
Augustin Nouaille, Jan Lorkowski, Xavier Pannecoucke, Marc Mauduit, Thomas Poisson, Samuel Couve-Bonnaire
Summary: This article presents a review of the challenges in using fluoroalkenes in ring-closing metathesis and cross-metathesis, highlighting the major developments in this field in recent years.
Article
Polymer Science
Sybren K. Schoustra, Vahid Asadi, Han Zuilhof, Maarten M. J. Smulders
Summary: In this study, we propose the use of internal hydrogen bonding in polyimine CANs to enhance creep resistance and control dynamic mechanical properties. The ortho-substituted hydroxy groups are found to stabilize the dynamic covalent imine bonds through internal hydrogen bonding, resulting in significantly improved material properties.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Le Chang, Cong Wang, Shuang Han, Xiaolong Sun, Feng Xu
Summary: This article presents a smart hydrogel system that can undergo structural transformations under neutral aqueous conditions, regulating stiffness and properties through dynamic covalent bonding. With good biocompatibility, this system shows great potential in biomedical applications such as tissue engineering and cell therapy.
Article
Chemistry, Multidisciplinary
Sybren K. Schoustra, Joshua A. Dijksman, Han Zuilhof, Maarten M. J. Smulders
Summary: This study demonstrates the fine-tuned control over macroscopic dynamic material properties using the Hammett equation in tuneable dynamic covalent polyimine materials. By systematically varying the dynamic covalent bond dynamics through selection of appropriate substituents, the research shows a correlation between Hammett parameter and various dynamic material properties. The results showcase the direct tunability and design of dynamic material properties in a quantitative and predictable manner, with the potential for recycling and self-healing over multiple cycles.
Article
Nanoscience & Nanotechnology
Joshua M. Kubiak, Amogh P. Morje, Diana J. Lewis, Sara L. Wilson, Robert J. Macfarlane
Summary: DNA is a powerful tool for programming nanomaterials, but its stability in local environments can be easily disrupted. Researchers have developed a method to stabilize DNA-grafted nanoparticles by embedding them in a hydrogel matrix, allowing for reversible structural changes induced by chemical or mechanical strain. This method extends the utility of programmable atom equivalents (PAEs) and other DNA-assembled micro- and nanostructures by providing flexibility and environmental responsiveness.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Multidisciplinary
Minmin Li, Yuting Xiong, Guangyan Qing
Summary: Protein post-translational modifications (PTMs) play a crucial role in cellular processes and are associated with various human diseases. PTM proteomics is emerging as a breakthrough in precision medicine, particularly in the study of phosphorylation and glycosylation. However, challenges such as low abundance and structural complexity still exist in the analysis of these PTMs. This Account provides an overview of innovative chemical tools and techniques developed to address these challenges.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Multidisciplinary Sciences
Hyunchang Park, Taewon Kang, Hyunjun Kim, Jeong-Chul Kim, Zhenan Bao, Jiheong Kang
Summary: This study reveals a strengthening strategy for self-healing polymers through metal-ligand coordination, achieving a synergistic effect between mechanical strength and self-healing efficiency by controlling the coordinating ability and mode of counter anions.
NATURE COMMUNICATIONS
(2023)
Article
Polymer Science
Zhi Rong Ou, Wei Li Peng, Min Zhi Rong, Ming Qiu Zhang
Summary: A novel strategy utilizing reversible boronic ester bonds and imine bonds has been proposed for controllable depolymerization and recovery of polymer blends. Through the preparation of reversibly interlocked polymer networks (RILNs) from two preformed crosslinked polymers, a cascading effect between boronic ester bonds and imine bonds is enabled, allowing controlled depolymerization and recovery.
Article
Polymer Science
Yinjun Chen, Huiyi Zhang, Soumabrata Majumdar, Rolf A. T. M. van Benthem, Johan P. A. Heuts, Rint P. Sijbesma
Summary: The diamide-imide equilibrium was utilized to synthesize dynamic covalent polymer networks with high processibility and processible viscoelasticity at elevated temperatures. The temperature-dependent mechanical properties of the materials were fully reversible, transitioning from elastic solids to predominantly viscous materials around 110 degrees Celsius.
Article
Chemistry, Physical
Bo Yang, Wusha Miao, Haijun Feng, Qian Zhao, Tao Xie, Ning Zheng
Summary: Typical dynamic covalent polymer networks can achieve self-healing, reprocessing, and shape reconfigurability, while topology isomerizable networks enable programmable physical properties. Combining these two transformation mechanisms into one network is challenging but can greatly enhance material versatility. In this study, researchers successfully regulated the bond exchange kinetics in a dynamic covalent network using an on-demand catalyst. The network demonstrated thermal healing, reprocessing, and shape reconfiguration without changing the polymer properties, and upon UV activation, significant network isomerization occurred. Further control of the switchable catalyst allowed selective programming of both the shapes and properties, offering potential benefits for flexible electronics and soft robotics.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Nanoscience & Nanotechnology
Kazi M. Alam, Charles E. Jensen, Pawan Kumar, Riley W. Hooper, Guy M. Bernard, Aakash Patidar, Ajay P. Manuel, Naaman Amer, Anders Palmgren, David N. Purschke, Narendra Chaulagain, John Garcia, Phillip S. Kirwin, Lian C. T. Shoute, Kai Cui, Sergey Gusarov, Alexander E. Kobryn, Vladimir K. Michaelis, Frank A. Hegmann, Karthik Shankar
Summary: A potential solution to the extraction of photogenerated holes from CdS nanocrystals and nanowires was presented by constructing CdS-C3N5 heterostructures, which improved photocatalytic degradation and photocatalytic decolorization performance while providing control over the reaction pathways.
ACS APPLIED MATERIALS & INTERFACES
(2021)