Article
Chemistry, Inorganic & Nuclear
Yuyuan Xiao, Rong Sun, Jiefeng Liang, Yuhui Fang, Zheng Liu, Shangda Jiang, Bingwu Wang, Song Gao, Wenliang Huang
Summary: The synthesized rare earth metal complexes exhibit complex electronic structures and magnetic behaviors. The structural and magnetic data are consistent with density functional theory calculations, revealing the antiferromagnetic coupling between the radical anions.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Biochemistry & Molecular Biology
Lei Zou, Christopher J. Addonizio, Bo Su, Matthew J. Sis, Adam S. Braegelman, Dongping Liu, Matthew J. Webber
Summary: This study utilized host-guest physical cross-linking to prepare supramolecular hydrogels, with the introduction of asymmetric azobenzene into copolymers enabling temperature and light responsiveness control. UV light was used to disrupt the supramolecular motif leading to a gel-to-sol transition, with rapid hydrogel recovery achieved through thermal relaxation of azobenzene.
Article
Chemistry, Multidisciplinary
Khaled Tamim, Cody B. Gale, Kaitlyn E. C. Silverthorne, Guanhua Lu, Cheok Hang Iao, Michael A. Brook
Summary: Improved sustainability can be achieved by using elastomers that biodegrade easily in the environment and can be reprocessed/reused well before reaching the end of their lifespan. In this study, we developed silicone elastomers with both thermoplasticity and antioxidant activity. By combining ionic and hydrogen bonding, natural phenolic antioxidants such as catechol, pyrogallol, and tannic acid were linked to telechelic aminoalkylsilicones. The mechanical properties of the elastomers, including their processability, were found to be optimal when the [ArOH]/[H2NR] ratio exceeded 1:1.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Aidan E. Gilchrist, Yueming Liu, Katarina Klett, Yu-Chung Liu, Sofia Ceva, Sarah C. Heilshorn
Summary: Hydrogels cross-linked by dynamic covalent chemistry (DCC) are stiff and remodelable, making them ideal biomimetics for tissue engineering applications. By using small molecule competitors, the formation of hydrogel network can be transiently controlled. Experimental and computational methods are used to find a series of competitors that predictably alter the gelation time and mechanics of hydrogels. The tunable gelation kinetics of recombinant hydrogel are demonstrated using human intestine organoids as a model system.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Martin Kos, Rafael Rodriguez, Jan Storch, Jan Sykora, Elsa Caytan, Marie Cordier, Ivana Cisarova, Nicolas Vanthuyne, J. A. Gareth Williams, Jaroslav Zadny, Vladimir Cirkva, Jeanne Crassous
Summary: This study describes the synthesis, photophysical, and chiroptical properties of novel aza[n]helicenes substituted with 2-pyridyl groups. The prepared compounds were coordinated to Ru(bipy)(2)(2+) units to form helical architectures, and their topology and stereochemistry were studied in detail using X-ray crystallography. Interestingly, the coordination to ruthenium(II) allowed for the preparation of fused multihelical systems incorporating aza- and ruthena-helicenes with redox-triggered chiroptical switching activity.
INORGANIC CHEMISTRY
(2021)
Article
Polymer Science
Chao Nan Zhu, Si Yu Zheng, Hao Nan Qiu, Cong Du, Miao Du, Zi Liang Wu, Qiang Zheng
Summary: The supramolecular hydrogels prepared in this study exhibit excellent mechanical properties and transparency, influenced by factors such as pH, temperature, and ionic strength. These hydrogels display plastic-like mechanical properties, self-recovery, shape-memory capabilities, as well as the ability to load functional hydrophobic molecules. The nanosized hydrophobic pockets within the hydrogels offer promising applications in areas such as fluorescent materials and drug delivery systems.
Article
Chemistry, Physical
Tomoya Hosokawa, Masaki Tsuji, Kosei Tsuchida, Kazuyuki Iwase, Takashi Harada, Shuji Nakanishi, Kazuhide Kamiya
Summary: Covalent organic frameworks (COFs) have attracted attention as novel photofunctional materials due to their wide-range visible-light absorption and ability to support various metals. Metal-doped COF films were synthesized and Cu atoms were found to serve as active catalytic sites for the photoinduced oxygen reduction reaction (ORR), showing a significantly higher photocurrent compared to undoped COF.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Raju Laishram, Souvik Sarkar, Indranil Seth, Nurjahan Khatun, Vinod Kumar Aswal, Uday Maitra, Subi J. George
Summary: This article explores a molecular control method for the fibrous network topology and macroscopic properties of supramolecular hydrogels. By introducing the surface-catalyzed secondary nucleation process, a non-covalent strategy is utilized to induce physical cross-links and bundling of supramolecular fibers, thereby influencing the microstructure and mechanical properties of the gel networks.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Polymer Science
Sirine Mhiri, Majdi Abid, Souhir Abid, Frederic Prochazka, Caroline Pillon, Nathalie Mignard
Summary: A series of thermosensitive PEG-PLA hydrogels were synthesized through the Diels-Alder reaction, with tunable properties. The study showed that the chemical composition influenced the properties and water diffusion mechanism of hydrogels.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Marko Mihajlovic, Margot Rikkers, Milos Mihajlovic, Martina Viola, Gerke Schuiringa, Blessing C. Ilochonwu, Rosalinde Masereeuw, Lucienne Vonk, Jos Malda, Keita Ito, Tina Vermonden
Summary: This study investigated the fabrication of chondroitin sulfate/hyaluronic acid-based DN hydrogels and demonstrated the tunability of their viscoelasticity and dynamic character through composition changes. The DN hydrogels, with their reversible, dynamic covalent bonds, are suitable for bioprinting and injectability, while also mimicking the mechanical properties of cartilage tissue.
Article
Biochemistry & Molecular Biology
Monika Gosecka, Mateusz Gosecki, Malgorzata Urbaniak
Summary: A graphene oxide-filled composite hydrogel based on boronic ester cross-links has been constructed to achieve better thermoresponsiveness. Increasing the concentration of graphene oxide enhances the rate and amplitude of material response. The diffusion property of the hydrogel can be regulated by the length of the applied boronic acid-based cross-linking agent.
Article
Nanoscience & Nanotechnology
Rui Peng, Yufeng Luo, Qianling Cui, Hean Zhang, Lidong Li
Summary: This work demonstrates the use of imine-type covalent organic framework nanoparticles as efficient photocatalytic initiators, without the need for a co-initiator, to prepare multifunctional hydrogels under visible light. The hydrogels exhibit high stretchability and mechanical properties, as well as promising fluorescence features.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
Maarten A. Mees, Thomas D. McAllister, Silvio Curia, Steven M. Howdle, Richard Hoogenboom
Summary: This study reports on a feasible method to introduce carbamate and fluorescent zwitterionic groups into linear polyethylenimine (L-PEI) by reacting with supercritical CO2, thus expanding the chemical toolbox of L-PEI and providing a new tool for the preparation of fluorescent L-PEI and PEtOx.
Article
Chemistry, Analytical
Lingshuang Wang, Yujie Chen, Zhen Zhang, Yali Chen, Qiliang Deng, Shuo Wang
Summary: A novel fluorometric method utilizing bipyridine-linked three-dimensional covalent organic frameworks (COFs) for the determination of Co2+ was developed. The fluorescence of COFs is quenched by Co2+ and the method has high sensitivity and accuracy, with satisfactory recoveries in complex samples.
Article
Chemistry, Inorganic & Nuclear
Peng Wang, Mohamed R. Saber, Peter E. VanNatta, Glenn P. A. Yap, Codrina Popescu, Christopher C. Scarborough, Matthew T. Kieber-Emmons, Kim R. Dunbar, Charles G. Riordan
Summary: Incorporating radical ligands into metal complexes is a growing trend in the design of single-molecule magnets. The described mononuclear transition metal SMMs feature high-spin iron(II) complexes with antiferromagnetically coupled alpha-diiminato radical ligands. Experimental and theoretical studies indicate that these complexes exhibit slow magnetic relaxation behavior with a strong magnetic exchange coupling.
INORGANIC CHEMISTRY
(2021)
