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排序方式: 共有102条查询结果,搜索用时 15 毫秒
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We present new singular solutions of the nonlinear Schrödinger equation (NLS)
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Zea Strassberger Maurice Mooijman Eelco Ruijter Albert H. Alberts Corien de Graaff Romano V. A. Orru Gadi Rothenberg 《应用有机金属化学》2010,24(2):142-146
A number of new N‐heterocyclic carbene (NHC) ligands were synthesized via a multicomponent reaction, wherein an aldehyde or ketone, a primary amine and an α‐acidic isocyanide were reacted, giving the corresponding 2H‐2‐imidazolines. These were easily alkylated with an alkyl halide at position N‐3, yielding the final NHC precursors, that were then complexed with Ru in situ. The resulting complexes are shown to be active and selective catalysts for the transfer hydrogenation of furfural to furfurol, using isopropanol as the hydrogen source. Importantly, the carbene ligand remains coordinated to the ruthenium center throughout the reaction. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
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Gadi Aleksandrowicz 《Journal of Combinatorial Theory, Series A》2012,119(3):503-520
Plane polyominoes are edge-connected sets of cells on the orthogonal lattice Z2, considered identical if their cell sets are equal up to an integral translation. We introduce a novel injection from the set of polyominoes with n cells to the set of permutations of [n], and classify the families of convex polyominoes and tree-like convex polyominoes as classes of permutations that avoid some sets of forbidden patterns. By analyzing the structure of the respective permutations of the family of tree-like convex polyominoes, we are able to find the generating function of the sequence that enumerates this family, conclude that this sequence satisfies the linear recurrence an=6an−1−14an−2+16an−3−9an−4+2an−5, and compute the closed-form formula an=2n+2−(n3−n2+10n+4)/2. 相似文献
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Raoul Plessius Rosa Kromhout Dr. André Luis Dantas Ramos Dr. Marilena Ferbinteanu Dr. Marjo C. Mittelmeijer‐Hazeleger Prof. Rajamani Krishna Prof. Gadi Rothenberg Dr. Stefania Tanase 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(26):7922-7925
We present a new metal–organic framework (MOF) built from lanthanum and pyrazine‐2,5‐dicarboxylate (pyzdc) ions. This MOF, [La(pyzdc)1.5(H2O)2] ? 2 H2O, is microporous, with 1D channels that easily accommodate water molecules. Its framework is highly robust to dehydration/hydration cycles. Unusually for a MOF, it also features a high hydrothermal stability. This makes it an ideal candidate for air drying as well as for separating water/alcohol mixtures. The ability of the activated MOF to adsorb water selectively was evaluated by means of thermogravimetric analysis, powder and single‐crystal X‐ray diffraction and adsorption studies, indicating a maximum uptake of 1.2 mmol g?1 MOF. These results are in agreement with the microporous structure, which permits only water molecules to enter the channels (alcohols, including methanol, are simply too large). Transient breakthrough simulations using water/methanol mixtures confirm that such mixtures can be separated cleanly using this new MOF. 相似文献
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Ma Xintong Li Sirui Ronda-Lloret Maria Chaudhary Rohit Lin Liangliang van Rooij Gerard Gallucci Fausto Rothenberg Gadi Raveendran Shiju N. Hessel Volker 《Plasma Chemistry and Plasma Processing》2019,39(1):109-124
Plasma Chemistry and Plasma Processing - We present an innovative approach for reacting carbon dioxide and water to give syngas by combining heterogeneous catalysis and non-thermal plasma... 相似文献