共查询到20条相似文献,搜索用时 591 毫秒
1.
2.
3.
4.
5.
Jörg Stierstorfer Dr. Karina R. Tarantik Dipl.‐Chem. Thomas M. Klapötke Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(23):5775-5792
A new way to make a bang : Several functionalized 1‐ethyl‐5‐aminotetrazoles, 1‐ethyl‐5‐nitrimino‐tetrazoles, and copper complexes have been synthesized and their chemical and energetic properties have been comprehensively characterized. The compounds belong to all classes of “energetic materials”: explosives, propellants, and pyrotechnics.
6.
Ji‐Ho Yoon Prof. Yun‐Je Lee Jeasung Park Dr. Taro Kawamura Dr. Yoshitaka Yamamoto Dr. Takeshi Komai Dr. Satoshi Takeya Dr. Sang Sup Han Dr. Jong‐Won Lee Prof. Yongjae Lee Prof. 《Chemphyschem》2009,10(2):352-355
Easy come, easy go: Hydroquinone forms a channel structure of cages with hydrogen‐bonded hexagons. These may provide an ideal route for the fast inclusion and facile release of hydrogen molecules (see figure), which can lead to reversible hydrogen storage under mild conditions.
7.
Kathleen M. Mullen Dr. James Mercurio Christopher J. Serpell Paul D. Beer Prof. 《Angewandte Chemie (International ed. in English)》2009,48(26):4781-4784
Bromide is best : The first [2]rotaxane incorporating the triazolium anion‐binding motif is prepared using bromide anion templation. Preliminary anion‐binding investigations reveal that the rotaxane exhibits the rare selectivity preference for bromide over chloride ions.
8.
Tetyana Beryozkina Dr. Ksenia Boyko Natalya Khanduyeva Volodymyr Senkovskyy Dr. Marta Horecha Ulrich Oertel Dr. Frank Simon Dr. Manfred Stamm Prof. Anton Kiriy Dr. 《Angewandte Chemie (International ed. in English)》2009,48(15):2695-2698
Graft work : The first surface‐initiated and site‐specific palladium‐catalyzed Suzuki polycondensation that allows selective grafting and patterning of semiconducting and emissive poly[9,9‐bis(2‐ethylhexyl)fluorene] ( 1 ) at room temperature is developed (see scheme). The pattering is demonstrated by AFM (see image).
9.
10.
11.
12.
Graeme R. Hanson Prof. Paul Jensen Dr. John McMurtrie Dr. Llew Rintoul Dr. Aaron S. Micallef Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(16):4156-4164
Radical assembly : Halogen bonding has been observed for the first time between an isoindoline nitroxide and an iodoperfluorocarbon (see figure), which cocrystallize to form a discrete 2:1 supramolecular compound in which N? O.???I halogen bonding is the dominant intermolecular interaction. This illustrates the potential use of halogen bonding and isoindoline nitroxide tectons for the assembly of organic spin systems.
13.
Ioanna Balomenou George Pistolis Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(17):4228-4232
Doing the hula twist? A photochemically stimulated inversion of an sp2‐hybridized oxygen atom upon simultaneous rotation of two adjacent bonds may be possible in a pure singlet excited potential energy surface in uninhibited fluid media (see scheme).
14.
Tim Ahnfeldt Nathalie Guillou Dr. Daniel Gunzelmann Irene Margiolaki Dr. Thierry Loiseau Dr. Gérard Férey Prof. Dr. Jürgen Senker Prof. Dr. Norbert Stock Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(28):5163-5166
Al together now! A new stable aluminum aminoterephthalate system contains octameric building blocks that are connected by organic linkers to form a 12‐connected net (see picture). The structure adopts a cubic centered packing motive in which octameric units replace individual atoms, thus forming distorted octahedral (red sphere) and tetrahedral cages (green spheres) with effective accessible diameters of 1 and 0.45 nm, respectively.
15.
16.
17.
Hai‐Hua Lu Hui Liu Dr. Wei Wu Xu‐Fan Wang Liang‐Qiu Lu Wen‐Jing Xiao Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(12):2742-2746
Economical approach : The first organocatalytic asymmetric intramolecular hydroarylation of phenol‐ and aniline‐derived enals offers one of the most straightforward and atom‐economic approaches to enantioriched chromans and tetrahydroquinolines (up to 96 % ee; see scheme).
18.
Guest Effect : The differences of nitrogen atom positions and the bridge bonds linked to two pyridine rings of some bipyridine guests can significantly affect the binding abilities and inclusion geometries of β‐cyclodextrin with the guests in both the solution and solid states.
19.
Jun Shi Hiroki Shigehisa Dr. Carlos A. Guerrero Ryan A. Shenvi Chuang‐Chuang Li Dr. Phil S. Baran Prof. 《Angewandte Chemie (International ed. in English)》2009,48(24):4328-4331
One stereocenter makes all the difference : The synthesis and biological evaluation of 17‐epi‐cortistatin A is reported from a common intermediate used to procure natural cortistatin A. The synthesis features a unique stereocontrolled Raney‐Ni reduction process that can be employed to reliably produce both α‐ and β‐configured D‐ring aryl steroids. Biological evaluations of these “cortalogs” are reported for the first time.
20.
Xin‐Yuan Liu Chi‐Ming Che Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(13):2367-2371
A special advantage : The platinum(II)‐catalyzed tandem cyclization of aminoalkynes with 1,3‐diketones offers a new and highly efficient method for the synthesis of indolines and tetrahydroquinolines (see scheme; M.S.=molecular sieves). This transformation affords good to excellent product yields with high regio‐ and chemoselectivity under mild reaction conditions.