共查询到20条相似文献,搜索用时 46 毫秒
1.
2.
3.
Juan‐José Cid Dr. Miguel García‐Iglesias Jun‐Ho Yum Dr. Amparo Forneli Josep Albero Eugenia Martínez‐Ferrero Dr. Purificación Vázquez Prof. Michael Grätzel Prof. Mohammad K. Nazeeruddin Prof. Emilio Palomares Prof. Tomás Torres Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(20):5130-5137
Let it shine! The impact of the anchoring group on photovoltaic performance by a series of phthalocyanine sensitisers (see figure) has been demonstrated.
4.
5.
6.
7.
8.
Serpil Boz Meike Stöhr Dr. Umut Soydaner Marcel Mayor Prof. 《Angewandte Chemie (International ed. in English)》2009,48(17):3179-3183
Like pearls on a string , molecular building blocks have been preorganized and then interlinked on a surface (see STM images). In this way both the supramolecular self‐assembly of the reactants as well as the subsequent thermal activation to release the protecting group are controlled.
9.
10.
11.
P. Fita Dr. N. Urbańska Dr. C. Radzewicz Prof. Dr. J. Waluk Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(19):4851-4856
Reaction rates from polarized spectroscopy : A new method based on ultrafast pump–probe polarization spectroscopy enables the measurement of the ground‐ and excited‐state reaction rates for self‐exchange processes. The technique was used to study double hydrogen transfer in porphycene and its derivatives (see figure).
12.
13.
Benito Alcaide Prof. Dr. Pedro Almendros Dr. Rocío Carrascosa Dipl.‐Chem. Teresa Martínez del Campo Dipl.‐Chem. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(11):2496-2499
Positive discrimination : Chemo‐ and regioselective palladium‐catalyzed cycloetherification of allendiols, namely β,γ‐ and γ,δ‐allendiols, may occur by judicious choice of palladium‐catalyzed conditions owing to their potential ability to discriminate between both nucleophilic sites (see scheme).
14.
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.
15.
16.
Andrew J. Hallett Dr. Gerard J. Kwant Dr. Johannes G. de Vries Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(9):2111-2120
Resolution through revolution : It is possible to extract 3,5‐dinitrobenzoyl‐protected amino acids enantioselectively with the aid of a table‐top centrifugal contact separator and a catalytic amount of a chiral host compound based on the Cinchona alkaloids. Enantioselectivities of up to 80 % could be reached in a single pass. This allows the development of a process for the continuous separation of racemates.
17.
Ru bo Zhang Dr. Leif A. Eriksson Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(10):2394-2402
Cutting ties : Strand scission and base release in hydroxy‐radical adducts of 3′‐uridine monophosphate (UMP) have been explored by using density functional theory. The presence of the ribose 2′‐OH group and the resultant formation of low‐barrier hydrogen bonds with oxygen atoms of the 3′‐phosphate linkage are highly important for hydrogen transfer and the subsequent bond‐breakage reactions (see picture).
18.
19.
Stefan Zahn Dipl.‐Chem. Werner Reckien Dr. Barbara Kirchner Prof. Dr. Holger Staats Jens Matthey Dipl.‐Chem. Arne Lützen Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(11):2572-2580
What a difference ! The energy differences between anti and syn conformers as well as the energy barrier for the rotation around the aryl–aryl bond of a number of 2,2′‐bipyridine molecules were examined by quantum‐chemical methods. The energy differences were found to be governed by the substituents directly attached to the bipyridine and their ability to form intramolecular hydrogen bonds.
20.
Andreas Lorbach Dipl.‐Chem. Michael Bolte Dr. Haiyan Li Hans‐Wolfram Lerner Dr. Max C. Holthausen Prof. Dr. Frieder Jäkle Prof. Dr. Matthias Wagner Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(25):4584-4588
Building bridges : The title compound forms an unprecedented polymeric structure with bridging B–H–B three‐center two‐electron bonds in the solid state. This organoborane serves as an efficient precursor for the preparation of boron‐doped π‐conjugated polymers by hydroboration polymerization with a functionalized 1,4‐diethynylbenzene (see picture). These polymers form thin films that show intense green luminescence.