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排序方式: 共有923条查询结果,搜索用时 6 毫秒
921.
Xiaoxin Yang Qiao Zhang Yufeng Liu Mengjie Nian Min Xie Shasha Xie Qinglian Yang Prof. Dr. Suna Wang Prof. Dr. Hui Wei Prof. Dr. Jingui Duan Prof. Dr. Shengyi Dong Prof. Dr. Hang Xing 《Angewandte Chemie (International ed. in English)》2023,62(34):e202303280
Dispersing metal-organic framework (MOF) solids in stable colloids is crucial for their availability and processibility. Herein, we report a crown ether surface coordination approach for functionalizing the surface-exposed metal sites of MOF particles with amphiphilic carboxylated crown ether (CEC). The surface-bound crown ethers significantly improve MOF solvation without compromising the accessible voids. We demonstrate that CEC-coated MOFs exhibit exceptional colloidal dispersibility and stability in 11 distinct solvents and six polymer matrices with a wide range of polarities. The MOF-CEC can be instantaneously suspended in immiscible two-phase solvents as an effective phase-transfer catalyst and can form various uniform membranes with enhanced adsorption and separation performance, which highlights the effectiveness of crown ether coating. 相似文献
922.
Dr. Lingfeng Gao Dr. Shan Mei Qian Qian Shichen Yu Prof. Dr. Bin Zhao Prof. Yingfeng Tu Prof. Dr. Christopher Y. Li 《Angewandte Chemie (International ed. in English)》2023,62(15):e202217267
Nanoparticle (NP) assembly has been extensively studied, and a library of NP superstructures has been synthesized. These intricate structures show unique collective optical, electronic, and magnetic properties. In this work, we report a bottom-up approach for fabricating spherical gold nanoparticle (AuNP) assemblies that mimic colloidosomes. Co-crystallization of lipoic acid-end-functionalized poly(ethylene oxide) (PEO) and AuNPs in solution via a self-seeding method led to the formation of hollow spherical NP assemblies named nanoparticle crystalsomes (NPCs). Due to the spherical shape, the translational symmetry of PEO crystals is broken in NPCs, which can be attributed to the competition between NP close packing and polymer crystallization. This was confirmed by tuning the NPC morphology via varying the self-seeding temperature, crystallization temperature, and PEO molecular weight. We envisage that this strategy paves the way to attaining exquisite morphological control of NP assemblies with broken translational symmetry. 相似文献
923.
Kyungsene Lee Brandon Davis Xuelin Wang Shubham Mirg Connie Wen Dr. Lidya Abune Dr. Benjamin E. Peterson Dr. Li Han Haoyang Chen Prof. Hongjun Wang Prof. Spencer E. Szczesny Prof. Yuguo Lei Prof. Sri-Rajasekhar Kothapalli Prof. Yong Wang 《Angewandte Chemie (International ed. in English)》2023,62(31):e202306583
Cell encapsulation has been studied for various applications ranging from cell transplantation to biological production. However, current encapsulation technologies focus on cell protection rather than cell regulation that is essential to most if not all cell-based applications. Here we report a method for cell nanoencapsulation and regulation using an ultrathin biomimetic extracellular matrix as a cell nanocapsule to carry nanoparticles (CN2). This method allows high-capacity nanoparticle retention at the vicinity of cell surfaces. The encapsulated cells maintain high viability and normal metabolism. When gold nanoparticles (AuNPs) are used as a model to decorate the nanocapsule, light irradiation transiently increases the temperature, leading to the activation of the heat shock protein 70 (HSP70) promoter and the regulation of reporter gene expression. As the biomimetic nanocapsule can be decorated with any or multiple NPs, CN2 is a promising platform for advancing cell-based applications. 相似文献