Article
Chemistry, Multidisciplinary
Mingfang Ma, Bo Wang, Aiyou Hao, Pengyao Xing
Summary: This study presents a co-assembly strategy to introduce hydrophilic chiral amines into OPV-appended carboxylic acids, resulting in the formation of chiral assemblies with tunable optical activity. The participation of chiral amines alters the aromatic stacking, enhances the luminescence of the OPV compounds, and facilitates the emergence of Cotton effects and circularly polarized luminescence. This work demonstrates the potential of OPV luminophores in chiroptical applications.
Article
Polymer Science
Jiaxiang Wen, Senjie Jiang, Junkang Wang, Xueqing Li, Zhijun Bi, Yi Jin, Longfei Fan, Lihuan Wang, Yancheng Wu, Feng Gan
Summary: Constructing fully rigid chain polyimides with reversible sol-gel/gel-sol transition is important for developing high-performance and functional materials. This study successfully developed new polyimide organogels using n-n interactions and investigated their reversible sol-gel transition behavior. The presence of dynamic n-n interactions in polyimides was confirmed through various spectroscopy methods. Additionally, a new type of nanofiltration (NF) membranes with high rejection for methylene blue and good permeability for sodium salt were prepared.
Article
Chemistry, Organic
Mohammad Mosharraf Hossain, M. Saeed Mirzaei, Sergey Lindeman, Saber Mirzaei, Rajendra Rathore
Summary: This study reports two series of pi-extended dibenzo[g,p]chrysenes (DBCs) with different substituents and benefits from the presence of methyl groups on the sp(3) bridges. The position and nature of substituents strongly affect the optoelectronic properties and charge delocalization mechanism. Isomerism leads to different packings in the solid state structure, with the para molecule showing a permanent three-dimensional porous structure.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Polymer Science
Zhiqin Wang, Chen Ma, Xiaoyu Huang, Guolin Lu, Mitchell A. Winnik, Chun Feng
Summary: The introduction of metal ions in the self-seeding process of copolymer micelles significantly increases the resistance of seed micelles to dissolution, explained by the formation of noncovalent cross-linking within the P2VP layer.
Article
Chemistry, Multidisciplinary
Nan Dai, Hao Zhao, Wen Yu, Fengting Lv, Libing Liu, Shu Wang
Summary: The study presents a facile intracellular catalysis system for enhancing the production of bio-based material in microorganisms by covalently linking synthetic metal catalyst. The synthetic metal catalyst demonstrated resistance to toxic biomolecules and enhanced biosynthesis in complicated biological systems. This work suggests the potential of using synthetic metal catalysts for regulating microbial biosynthesis intracellularly.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Polymer Science
Manping Ma, Nipin Dai, Xiaotian Liu, Chuan Li, Qiaolong Yuan, Farong Huang
Summary: Silicon-containing arylacetylene resins synthesized with interchain pi-pi stacking interactions show higher mechanical properties and heat resistance compared to traditional resins. The strong interchain pi-pi stacking interactions in the PODSA resins result in higher melting temperature and thermal conductivity post-curing.
Review
Chemistry, Multidisciplinary
Hayato Tsuji
Summary: Carbon-bridged oligo(phenylenevinylene)s (COPVs) have a rigid planar molecular structure, excellent functionality and high stability, and exhibit phenomena at room temperature that conventional molecules only show at cryogenic temperatures.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Chemistry, Multidisciplinary
Simon J. Coles, Peter N. Horton, Patrick Kimber, Wim T. Klooster, Pingchuan Liu, Felix Plasser, Martin B. Smith, Graham J. Tizzard
Summary: Treatment of a complex generates an unusual compound that can be reversed with the addition of another compound. Thermal decomposition of the complex leads to carbon-carbon bond activation.
CHEMICAL COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Masashi Mamada, Hajime Nakanotani, Chihaya Adachi
Summary: This study reports structure-property relationships in a series of oligo(p-phenylenevinylene) derivatives, revealing significant effects on crystal packing, emission properties, and lasing behavior by substitution with cyano groups.
MATERIALS ADVANCES
(2021)
Article
Chemistry, Organic
Hui Wang, Hongchi Zhao, Shuang Chen, Libin Bai, Zhiyi Su, Yonggang Wu
Summary: Symmetric ladder-type oligo(p-aniline)s and poly(p-aniline)s were successfully synthesized by an intramolecular ring closure in a highly efficient SNAr reaction from oligo(p-phenylene)s and poly(p-phenylene)s with fluorine (F) and secondary amine (NH) groups. Unlike Cadogan ring closure, the newly designed cyclization reaction will not produce a mixture of symmetric and nonsymmetric structures. Moreover, the introduction of the F atom does not hinder Suzuki polymerization, indicating the possibility of preparing regular oligomers and polymers with a nitrogen bridge.
Article
Materials Science, Paper & Wood
Jialong Tian, Wenhui Yu, Jiang Pan, Kuang Wang, Zhenming Qi, Ling Lin, Jinmei Wang, Chunxia Wang
Summary: A flame retardant containing Si, P, S, and N was synthesized for cotton fabric, showing improved flame retardancy and thermal stability. The chemical structure was characterized by NMR and FTIR, confirming the successful synthesis. The flame retardant was uniformly loaded on cotton fabric and greatly enhanced its properties, including limiting oxygen index, vertical combustion, thermal stability, tensile strength, whiteness, and washing stability. The synthesis of this flame retardant and its application on cotton fabric provides a new perspective for the preparation of flame retardant textiles.
Article
Chemistry, Physical
Yan Jin, Wenqin Li, Rizalina Tama Saragi, Marcos Juanes, Cristobal Perez, Alberto Lesarri, Gang Feng
Summary: This study explores the important role of non-covalent interactions between sulfur and aromatic rings in biological chemistry. By using broadband time-domain microwave spectroscopy, the sulfur-arene interactions between benzofuran and sulfur dioxide or hydrogen sulfide were investigated. The weakly-bound adducts were successfully detected and their structural characteristics were consistent with computational predictions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Wang Zhiqin, Xiang Bo, Huang Xiaoyu, Lu Guolin, Feng Chun
Summary: The self-seeding route of living crystallization-driven self-assembly (CDSA) is an important strategy for generating uniform nanofibers. This study investigates the influence of phosphotungstic acid on the self-seeding of OPV5-b-P2VP(42) and finds that the acid enhances the resistance of seed micelles to dissolution, leading to the formation of shorter fiber-like micelles.
ACTA CHIMICA SINICA
(2022)
Article
Chemistry, Multidisciplinary
Surbhi Grewal, Pravesh Kumar, Saonli Roy, Indu Bala, Chitranjan Sah, Santanu Kumar Pal, Sugumar Venkataramani
Summary: This study reports two tripodal C-3-symmetric molecular systems with extended conjugation and explores the influence of the extended pi-bonds on their absorption properties, thermal relaxation of the photoisomers, and propensity for self-assembly. The position of the acryl group is found to significantly impact the behavior and self-assembly of the molecules.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Materials Science, Ceramics
M. A. Vidales-Hurtado, A. I. Caudana-Campos, R. A. Mauricio-Sanchez, G. Mendez-Montealvo, F. Caballero-Briones, A. Mendoza-Galvan
Summary: The study investigates the thermo-reversible sol-gel transition in solutions made of titanium n-butoxide, ethanol, water, and nitric acid using in situ temperature-dependent Fourier transform infrared spectroscopy. It was found that the nitrate ion plays a key role in substituting ligands and forming bridges and chelates, leading to gel formation. The elastic component was identified as the most important in the material's structure based on dynamic rheological studies of the temperature-dependent viscoelastic behavior.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)