排序方式: 共有62条查询结果,搜索用时 0 毫秒
21.
Tuan Trinh Daniel Saliba Chenyi Liao Donatien deRochambeau Alexander Lee Prinzen Jianing Li Hanadi F. Sleiman 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(10):3074-3079
The incorporation of synthetic molecules as corner units in DNA structures has been of interest over the last two decades. In this work, we present a facile method for generating branched small molecule‐DNA hybrids with controllable valency, different sequences, and directionalities (5′–3′) using a “printing” process from a simple 3‐way junction structure. We also show that the DNA‐imprinted small molecule can be extended asymmetrically using polymerase chain reaction (PCR) and can be replicated chemically. This strategy provides opportunities to achieve new structural motifs in DNA nanotechnology and introduce new functionalities to DNA nanostructures. 相似文献
22.
Jiang Demin Zhu Chenyi He Yuan Xing ChengCheng Xie Kun Xu Yan Wang Yuqiao 《Journal of Solid State Electrochemistry》2022,26(11):2435-2443
Journal of Solid State Electrochemistry - Anodes play an important role in the extracellular electron transfer (EET) process in microbial fuel cells (MFCs). Herein, polyaniline modified... 相似文献
23.
Junjie Zhou Hang Li Liguo Tan Yue Liu Junliang Yang Ruimao Hua Chenyi Yi 《Angewandte Chemie (International ed. in English)》2023,62(15):e202300314
Hole transport materials (HTMs) with high hole mobility, good band alignment and ease of fabrication are highly desirable for perovskite solar cells (PSCs). Here, we designed and synthesized novel organic HTMs, named T3, which can be synthesized in high yields with commercially available materials, featuring a substituted pyrrole core and triphenylamine peripheral arms. The capability of functionalization in the final synthetic step provides an efficient way to obtain a variety of T3-based HTMs with tunable energy levels and other properties. Among them, fluorine-substituted T3 (T3-F) exhibits the best band alignment and hole extraction properties, leading to PSCs with outstanding PCEs of 24.85 % and 24.03 % (certified 23.46 %) for aperture areas of 0.1 and 1 cm2, respectively. The simple structure and tunable performance of T3 can inspire further optimization for efficient PSCs. 相似文献
24.
25.
Multi-walled carbon nanotubes (MWCNTs) were decorated with magnetite (Fe3O4) nanoparticles and then used to modify a stainless steel electrode. The Fe3O4/MWCNTs composite was characterized by scanning electron microscopy, transmission electron microscopy, Raman spectroscopy and X-ray diffraction patterns. Electrochemical properties of the modified electrode revealed a substantial catalytic activity for the reduction of hydrogen peroxide. The relationship between peak current and the concentration of hydrogen peroxide was linear in the range from 0.06?mmol?L?1 to 0.36?mmol?L?1, and the lowest detectable concentration is 0.01?mmol·L?1 (S/N?=?3). The modified stainless steel electrode displays excellent stability. Graphical abstract
TEM image of Fe3O4/MWCNTs nanocomposites (left) and SEM image of stainless steel after loading Fe3O4/MWCNTs nanocomposites (right). 相似文献
26.
Xiaoyan Zhao Chenyi Wang Yanhua Cheng Wenping Chen Meifang Zhu 《Colloid and polymer science》2010,288(14-15):1471-1477
Photoluminescence electrospun fibers were prepared from poly(fluorinated imide)s (PFIs) solutions. The studied PFIs included three fluorinated aromatic polyimides containing naphthalene pendant groups. The maximum UV–Vis absorption spectrums of the PFI fibers were located at 300–340 nm. The photoluminescence spectra indicated that the PFI fibers exhibited the following luminescence characteristics (excitation wavelength (nm); color): 330, blue; 450, olive green; 520, red. These phenomena could be attributed to the coexistence of naphthalene unit and fluorinated groups. The nanopores surface morphology of PFI fibers were studied using scanning electron microscopy and scanning probe microscopy. Surface wettability of PFI electrospun membranes were characterized by contact angle measurement. The contact angles on the electrospun poly(aryl ether) fibers for water and glycerol were in the range of 137.7–139.0° and 139.1–142.1°, respectively. 相似文献
27.
Under copper-free conditions and with Cs2CO3 as a base, PdCl2(PCy3)2 showed high catalytic activity for cross-coupling of electron-rich, electron-neutral, and electron-deficient aryl chlorides with a variety of terminal alkynes in DMSO at 100-120 degrees C affording internal arylated alkynes in good to excellent yields. 相似文献
28.
A new model for producing band gaps for flexural elastic wave propagation in a periodic microbeam structure is developed using an extended transfer matrix metho... 相似文献
29.
30.
Keller S Yi C Li C Liu SX Blum C Frei G Sereda O Neels A Wandlowski T Decurtins S 《Organic & biomolecular chemistry》2011,9(18):6410-6416
Benzodifuran-functionalised pyrene and anthracene fluorophores 1 and 2 were obtained in reasonable yields. Their single crystal structures, electrochemical, optical absorption, and fluorescence characteristics have been described. They show strong luminescence with high quantum yields of 0.53 for 1 and 0.48 for 2. 相似文献