共查询到20条相似文献,搜索用时 31 毫秒
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Yuta Suzuki Ryo Yazaki Naoya Kumagai Dr. Masakatsu Shibasaki Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(27):5026-5029
Taking the reins : The title transformation of thioamides and N‐diphenylphosphinoyl imines is described. By harnessing the power of cooperative catalysis between a soft Lewis acid and a hard Brønsted base, thioamide carbon pronucleophiles can furnish Mannich products (see scheme). Divergent transformation of the thioamide functionality highlights the utility of this methodology.
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Jorge Bordello Belén Reija Dr. Wajih Al‐Soufi Prof. Dr. Mercedes Novo Prof. Dr. 《Chemphyschem》2009,10(6):931-939
Buckle up! The dimerization of small fluorescent guests is strongly enhanced in presence of a cyclodextrin host. The host cavity acts like a belt to assist the self‐assembly of guests (see picture). Small variations in the guest structure have significant influence on the stability and geometry of the aggregates.
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Jie Han Dr. Xiao‐Yong Chang Li‐Rong Zhu Mei‐Li Pang Dr. Ji‐Ben Meng Prof. Stephen Sin‐Yin Chui Dr. Siu‐Wai Lai Dr. V. A. L. Roy Dr. 《化学:亚洲杂志》2009,4(7):1099-1107
Chain change : Variations in the position, number, and chain length of the n‐alkoxy chains readily tune the liquid‐crystalline properties of 2,5‐diaryl‐1,3,4‐thiadiazole derivatives from smectic to hexagonal columnar mesophases at room temperature. The calamitic S‐heterocyclic compounds show electrical conductivity in both solid and liquid‐crystal states.
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Carla Bittencourt Dr. Gregory Van Lier Dr. Xiaoxing Ke Irene Suarez‐Martinez Dr. Alexandre Felten Dr. Jacques Ghijsen Dr. Gustaaf Van Tendeloo Prof. Christopher P. Ewels Dr. 《Chemphyschem》2009,10(6):920-925
Finely tuned: Carbon nanotubes are exposed to a CF4 radio‐frequency plasma (see picture). High‐resolution photoelectron spectroscopy shows that the treatment effectively grafts fluorine atoms onto the MWCNTs, altering the valence electronic states. Fluorine surface concentration can be tuned by varying the exposure time.
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Andrey A. Fokin Prof. Dr. Boryslav A. Tkachenko Dr. Natalie A. Fokina Dr. Heike Hausmann Dr. Michael Serafin Dr. Jeremy E. P. Dahl Dr. Robert M. K. Carlson Dr. Peter R. Schreiner Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(15):3851-3862
Functionalized nanodiamonds : Various functional groups have been incorporated into the structures of the naturally occurring diamondoids [1(2)3]tetramantane and [12312]hexamantane (cyclohexamantane), which represent hydrogen‐terminated prism‐shaped nanodiamonds (see picture). The attachment points define the use of these diamond‐like molecules as geometric building blocks for a variety of applications.
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Zijian Zhang Miao Yang Dr. Xinjun Zhang Lichu Zhang Bo Liu Ping Zheng Wei Wang Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(10):2352-2361
Let's stick together : The gelation ability of a dendritic gelator has been enhanced by its complexation with a polyelectrolyte (see figure). This concept provides a route to construct novel functional or ordered materials by complexation of other low‐molecular‐mass functional species with polyelectrolytes.