Manganese oxide octahedral molecular sieve (OMS) materials are outstanding selective oxidation catalysts. This review concerns a summary of synthesis, characterization, and applications of OMS materials. The current development of controls of sizes, morphologies, and the applications of OMS in environmental catalysis, selective oxidations, and others are included. 相似文献
This article summarizes recent efforts for synthesis and reaction chemistry with (imido)vanadium(V)‐alkyl, ‐alkylidene complexes. These (arylimido)vanadium(V) dichloride complexes especially containing aryloxo ligands exhibited notable activities for ethylene polymerization affording ultra high molecular weight polymers with unimodal molecular weight distribution, and the reacition pathways for the polymerization/dimerization using (imido)vanadium(V) dichloride complexes containing (2‐anilido‐methyl)pyridine ligands can be tuned by modification of the steric bulk in the imido substituents; the adamantylimido analogues exhibited exceptionally high both activity and selectivity in the dimerization. This article entitled “(Imido)Vanadium(V)‐Alkyl, Alkylidene Complexes Exhibiting Unique Reactivities towards Olefins, Phenols, and Benzene via 1,2‐C‐H Bond Activation” was contributed by Prof. Kotohiro Nomura who was invited as a Visiting Lecturer (Mar. 6, 2011 ～Mar. 12, 2011) of the Chemistry Research Promotion Center, Taiwan, R.O.C. For full text, please see pp 139～148 in this issue. 相似文献
The use of DMC chemistry for the synthesis of 5‐membered N‐ and O‐heterocycles is reported. In these one‐pot reactions DMC act as a sacrificial molecule providing the selected substrates with an halogen‐free leaving group which is then expelled to form the 5‐membered cyclic by intramolecular cyclisation. For more information on this figure, turn to pp 1375—1384 in this issue. 相似文献
AFM topographical image (40 × 40 μm2) of a hepatocellular carcinoma cell with illustrations depicting the location and profile of force/adhesion measurements made on the cell surface and on the substrate. We have demonstrated that adhesion expression in Hepatocellular carcinoma cells is differentiation stage dependent. For more details on this figure, please see pp 929?933 in this issue. 相似文献
Four centuries ago, Galilei realized his astronomical observatory, pointing towards the sky the recently invented telescope. Space missions, applications in radio‐astronomy and spectroscopy, and high performing computer simulations, made possible the discovery of rich chemistry in the cosmos and to promote intense laboratory research. For more details on this figure, discover The Astrochemical Observatory: Molecules in the Laboratory and in the Cosmos in this issue. (pp 1045～1052) 相似文献
Repeated reaction between chiral quaternary ammonium halide dimer and disodium disulfonate gave the ionic polymer, which contains chiral quaternary ammonium sulfonate structure as a repeating unit. This chiral ionic polymer showed an excellent catalytic activity in asymmetric benzylation reaction. With the chiral ionic polymer catalysts, high level of enantioselectivities up to 97% ee were attained. For more details on this figure, please see pp 815～821 in this issue. 相似文献
In order to leap over the hassles from the reported critical Fries rearrangement towards the synthesis of angelicin analogs, the newly detour method was delicately designed and applied not only to the compound synthesis in gram‐scale range, but also to the successful evaluation of both in vitro and in vivo biological efficacy. For more information on this figure, turn to pp 1548～1554 in this issue. 相似文献
Donor‐ or acceptor‐substituted azobenzenethiol monolayers were used to modify the Au electrode surface. Photo‐switching of the azobenzene moiety resulted in changes in the work function of the metal, as well as the packing order of the monolayer at the surface, both of which modulate the electron transfer between the electrode and the redox couple in a contacting solution. This figure was contributed by Prof. Yu‐Tai Tao, now the Distinguished Research Fellow of the Institute of Chemistry, Academia Sinica, Taiwan. For more information about this article, please see pp 9–17 in this issue. 相似文献
The luminescence process using density functional method is studied. Based on the basic research, the commercial red phosphor has been improved and a series of new red emitting VUV phosphors with high efficiency have been explored. This article entitled “Recent Research Progress of Red Phosphors for PDPs Applications” was contributed by Prof. Yuhua Wang who was invited as a Visiting Lecturer (September 18, 2011 ～ September 24, 2011) of the Chemistry Research Promotion Center, Taiwan, ROC. For full text, please see pp 689～692 in this issue. 相似文献
The computational study of gold(I)‐catalyzed ring expansion reactions of unactivated alkynylcyclopropanes is reported. The main finding of this work is that when unactivated alkynylcyclopropane with a smaller singlet‐triplet splitting (ΔEST) is utilized, the gold(I)‐catalyzed ring expansion step has a smaller activation energy and a larger exothermicity. For more information about this figure, turn to pp 473～480 in this issue. 相似文献
Perflurooctanesulfonates (fluorous sulfonates) have been developed as triflates and nonaflates alternatives for Pd‐catalyzed coupling reactions to form C‐C, C‐N, C‐S, C‐H, and C‐CN bonds. They also serve as a phase‐tag for fluorous solid‐phase extraction (F‐SPE) to facilitate the product purification. The utility of fluorous sulfonate linkers in the synthesis of biologically interested library scaffolds is summarized in this short review article. This article entitled “Convertible Fluorous Sulfonate Linker for the Synthesis of Diverse Library Scaffolds“ was contributed by Prof. Wei Zhang who was invited as a Visiting Lecturer of the Chemistry Research Promotion Center, Taiwan, R.O.C. (November 23 ～ November 29, 2010). For full text, please see pp. 575～582 in this issue. 相似文献
In this paper, a simple in situ preparation of aluminum iodide (AlI3) from cheap, abundant aluminum metal (Al(s)) and elemental iodine (I2) served as an efficient catalyst for the dehydrative thioglycosylation of 1‐hydroxyl sugars with various alkyl and aryl mercaptans. Due to the anchimeric assistant mechanism, the anomerically pure β‐thioglycosides were obtained in high yields with exclusive diastereoselectivity. More details will be discussed by Dr. Shiue‐Shien on page 464–473 in this issue.
In this paper , adsorption of lactic acid (LA) on the outer surface, inside and in the edge of Si‐doped Single Walled Carbon Nanotubes (SWCNTs) with different chirality has been investigated. The results showed that the adsorption of lactic acid onto the outer surface of Si‐doped carbon nanotubes is thermodynamically favored. More details will be discussed by Dr. A. N. Chermahini and his group on page 250–260 in this issue.
In this paper, 2,11‐diamino‐4,9‐diphenyl‐4,9‐dihydrobenzo [f]pyrano[3,2‐h]chromene‐3,10‐dicarbonitrile derivatives were prepared as new compounds by the condensation reaction of 2,3‐naphthalenediol with malononitrile and aldehydes using triethanolammonium acetate [TEA][HOAc] as an efficient catalyst. More details will be discussed by Dr. Khazaei and his group on page 757–763 in this is sue.
The half‐occupied iron 3d orbitals interact with a specific porphyrin molecular orbital and affect the NMR chemical shifts. This review describes the importance of revealing the relationship between the orbital interactions and chemical shifts to determin the fine electronic structures of iron porphyrins as well as naturally occurring heme proteins. For more information on this figure, turn to pp 9～21 in this issue. 相似文献
