共查询到20条相似文献，搜索用时 15 毫秒
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Ning Zheng Zizheng Fang Weike Zou Qian Zhao Tao Xie 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2016,128(38):11474-11474
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《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2017,129(47):15054-15058
Effective induction of preferred‐handed helicity of polyacetylenes by pendant mechanically chiral rotaxanes is discussed. Polyacetylenes possessing optically active mechanically chiral rotaxanes in the side chains were synthesized by the polymerization of the corresponding enantiopure [2]rotaxane‐type ethynyl monomers prepared by the chiral‐phase HPLC separations. The CD Cotton effects revealed that the polyacetylenes took preferred‐handed helical conformations depending on the rotaxane chirality. The preferred‐handed helix was not disturbed by an additional chiral substituent on the rotaxane side chain. These results demonstrate the significance and utility of mechanically chiral rotaxanes for the effective construction of asymmetric fields. 相似文献
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Xingxing Chen Zijian Zhang Zicheng Ding Jun Liu Lixiang Wang 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2016,128(35):10307-10307
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Juna Bae Magdalena O. Cichocka Yi Zhang Zoltn Bacsik Sara Bals Xiaodong Zou Tom Willhammar Suk Bong Hong 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(30):10336-10341
Understanding the molecular‐level mechanisms of phase transformation in solids is of fundamental interest for functional materials such as zeolites. Two‐dimensional (2D) zeolites, when used as shape‐selective catalysts, can offer improved access to the catalytically active sites and a shortened diffusion length in comparison with their 3D analogues. However, few materials are known to maintain both their intralayer microporosity and structure during calcination for organic structure‐directing agent (SDA) removal. Herein we report that PST‐9, a new 2D zeolite which has been synthesized via the multiple inorganic cation approach and fulfills the requirements for true layered zeolites, can be transformed into the small‐pore zeolite EU‐12 under its crystallization conditions through the single‐layer folding process, but not through the traditional dissolution/recrystallization route. We also show that zeolite crystal growth pathway can differ according to the type of organic SDAs employed. 相似文献
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Christopher C. Cummins 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2006,118(6):876-884
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Guillaume Blanger‐Chabot Holger Braunschweig 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(40):14408-14412
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Aurlie Ozanne‐Beaudenon Stphane Quideau 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2005,117(43):7227-7231
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Hans‐Jrg Himmel 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(34):11724-11742