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271.
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273.
Stabilizing and Organizing Bi3Cu4 and Bi7Cu12 Nanoclusters in Two‐Dimensional Metal–Organic Networks
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Dr. Linghao Yan Bowen Xia Qiushi Zhang Dr. Guowen Kuang Prof. Dr. Hu Xu Jun Liu Prof. Dr. Pei Nian Liu Prof. Dr. Nian Lin 《Angewandte Chemie (International ed. in English)》2018,57(17):4617-4621
Multinuclear heterometallic nanoclusters with controllable stoichiometry and structure are anticipated to possess promising catalytic, magnetic, and optical properties. Heterometallic nanoclusters with precise stoichiometry of Bi3Cu4 and Bi7Cu12 can be stabilized in the scaffold of two‐dimensional metal–organic networks on a Cu(111) surface through on‐surface metallosupramolecular self‐assembly processes. The atomic structures of the nanoclusters were resolved using scanning tunneling microscopy and density functional theory calculations. The nanoclusters feature highly symmetric planar hexagonal shapes and core–shell charge modulation. The clusters are arranged as triangular lattices with a periodicity that can be tuned by choosing molecules of different size. This work shows that on‐surface metallosupramolecular self‐assembly creates unique possibilities for the design and synthesis of multinuclear heterometallic nanoclusters. 相似文献
274.
Chemistry of Heterocyclic Compounds - Novel 4'-aryl-1,2',5'-triphenyl-2',4',6,7-tetrahydrospiro[indazole-5,3'-pyrazol]-4(1H)-ones have been synthesized in moderate yields by... 相似文献
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The first metal‐carbon bond β‐form paddlewheel complexes containing a Pd24+ core, [Pd(η2‐dithio)]2(μ‐dppa)( μ‐SCNMe2) (dithio = S2P(OEt)2, 2 ; S2COEt, 3 ; S2CNC4H8, 4 ), were prepared by the reactions of the α‐form paddlewheel‐type Pd2+4 dipalladium complex [Pd2 (μ‐Hdppa)2(μ‐SCNMe2)2][Cl]2, 1 with various dithio‐ligands, [NH4][S2P(OEt)2], [K][S2COEt] and [NH4][S2CNC4H8], in methanol at ambient temperature (Hdppa = bis(diphenylphosphino)amine). Electronic spectra and two X‐ray structures of the Pd2+4 species have been determined. 相似文献
277.
炔丙醇电还原自由基中间产物的ESR研究 总被引:1,自引:0,他引:1
Electrochemical-ESR technique (ex situ method) with spin traps phenyl tert-butyl nitrone (PBN) and 5,5-dimethyl-1-Pyrroline-1-oxide (DMPO) has been applied to the detection of radical intermediates produced during electroreduction of propargyl alcohol (PA) at platinized platinum electrode in an acidified alcohol-aqua solution. Propargyl radical and H have been detected by PBN and DMPO, respectively. As a result of the discovery of these radicals, an evidence for a radical mechanism of the electroreduction of PA put forward by some authors might be obtained beyond all doubt. 相似文献
278.
Kuang‐Hway Yih 《中国化学会会志》2003,50(5):1109-1113
The conformational isomers endo‐ and exo‐[Mo{η3‐C3H4(CH3)}(η2‐pyS)(CO)(η2‐diphos)] (diphos: dppm = {bis(diphenylphosphino)methane}, 2 ; dppe = {1,2‐bis(diphenylphosphino)ethane}, 3 ) are prepared by reacting the double‐bridged pyridine‐2‐thionate (pyS) complex [Mo{η3‐C3H4(CH3)}(CO)2]2(η1:η2:μ‐pyS)2, 1 with diphos in refluxing acetonitrile. Stereoselectivity of the methallyl, C3H4(CH3), ligand improves the formation of the exo‐conformation of 2 and 3 . Orientations and spectroscopy of these complexes are discussed. 相似文献
279.
Wen‐Tong Chen Xi‐Rui Zeng Xiao‐Niu Fang Xin‐Fa Li Han‐Mao Kuang 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(12):m571-m573
The title compound, (C10H10N2)[CdBr4], was synthesized via a hydrothermal reaction. Its structure features discrete 4,4′‐bipyridinium cations and tetrahedral [CdBr4]2− anions linked into ion pairs by single N—H⋯Br hydrogen bonds. Photoluminescent investigation reveals that the title compound displays a strong emission in the blue region, which may originate from π→π* charge‐transfer interactions of the 4,4′‐bipyridinium cations. 相似文献
280.
在H2SO4-V(Ⅴ)钼酸铵-丙酮体系中,磷钒钼杂多酸有一个尖锐,灵敏的铬合吸附波,其了峰电位为-0.26V,检测下限0.04mg/L,峰电流与磷量在3-50mg/50L范围内呈线性系,所拟方法可用于碳锰和硅锰中磷的测定。 相似文献