与表现出依赖于结构的磁性的层状金属氢氧化物盐相比,包含过渡金属离子的层状双氢氧化物(LDH)的磁性仍然可以发展。在本文中,我们报告了由Co-Ni LDH和正烷基磺酸根阴离子(Co-Ni-C n SO 3 LDH)组成的混合磁体的制备。由于Co-Ni LDH是阴离子可交换的,因此我们可以通过嵌入n来系统地控制层间距-具有不同碳数的-烷基磺酸盐。用与温度和场有关的磁化强度测量来检验磁性能。结果,我们发现矫顽场取决于基础间距。建议增加基础间距会改变平面内超交换相互作用与远程平面外偶极相互作用之间的竞争。此外,矫顽场在基距20Å附近的跃迁被认为是Co-Ni-C n SO 3 LDH中磁有序的修正。
MOLECULAR CONTAINERS AND METHODS OF MAKING AND USING SAME
申请人:Isaacs Lyle David
公开号:US20140094529A1
公开(公告)日:2014-04-03
Acyclic CB[n]-type compounds, methods of making such compounds, and uses of the compounds. For example, these compounds can be used as nanocontainers to solubilize pharmaceutical agents. Also provided are compositions and methods of using them for therapy or prophylaxis of a wide variety of conditions for which therapy or prophylaxis is desirable.
THE STABILITY OF THE CARBON--SULFUR BOND IN SOME ALIPHATIC SULFONIC ACIDS
作者:F. C. Wagner、E. Emmet. Reid
DOI:10.1021/ja01360a026
日期:1931.9
Micellar effects on the reaction of (arylsulfonyl)alkyl arenesulfonates with hydroxide ion. 2. The absence of substrate orientational effects in a series of sulfonates of different hydrophobicities
作者:Frank M. Witte、Jan B. F. N. Engberts
DOI:10.1021/jo00221a032
日期:1985.10
Characterization of a Two-component Alkanesulfonate Monooxygenase from Escherichia coli
作者:Eric Eichhorn、Jan R. van der Ploeg、Thomas Leisinger
DOI:10.1074/jbc.274.38.26639
日期:1999.9
The Escherichia coli ssuEADCB gene cluster is required for the utilization of alkanesulfonates as sulfur sources, and is expressed under conditions of sulfate or cysteine starvation. The SsuD and SsuE proteins were overexpressed and characterized. SsuE was purified to homogeneity as an N-terminal histidine-tagged fusion protein. Native SsuE was a homodimeric enzyme of ill, 58,400, which catalyzed an NAD(P)H-dependent reduction of FMN, but it was also able to reduce FAD or riboflavin, The SsuD protein was purified to >98% purity using cation exchange, anion exchange, and hydrophobic interaction chromatography. The pure enzyme catalyzed the conversion of pentanesulfonic acid to sulfite and pentaldehyde and was able to desulfonate a wide range of sulfonated substrates including C-2 to C-10 unsubstituted linear alkanesulfonates, substituted ethanesulfonic acids and sulfonated buffers. SsuD catalysis was absolutely dependent on FMNH2 and oxygen, and was maximal for SsuE/SsuD molar ratios of 2.1 to 4.2 in 10 mM Tris-HCl, pH 9.1. Native SsuD was a homotetrameric enzyme of M-r 181,000. These results demonstrate that SsuD is a broad range FMNH2-dependent monooxygenase catalyzing the oxygenolytic conversion of alkanesulfonates to sulfite and the corresponding aldehydes, SsuE is the FMN reducing enzyme providing SsuD with FMNH2.