We succeeded in preparing silver (Ag) nanoparticles by alcohol reduction of fatty acid silver salts under microwave irradiation (2.45 GHz) for 1–5 min at 413–430 K. The average sizes of Ag nanoparticles were controlled in the range from 4.9 to 7.4 nm only by changing length of the alkyl chains in the fatty acids.
Structural, odd–even chain alternation and thermal investigation of a homologous series of anhydrous silver(i) n-alkanoates
作者:Peter Nattaniel Nelson、Henry Anthony Ellis
DOI:10.1039/c2dt11638c
日期:——
are nearly isostructural, odd–even chain alternation is observed in density, anti-symmetric stretchingvibrations of methyl and unusually, carboxylate (head) groups, as a result of packing differences of hydrocarbon chains within the crystal lattice. These arise from the relative vertical distances between polymeric sheets, which are not in the same plane. Thus, for odd chain length compounds, where
从X射线粉末衍射,固态自旋解耦13 C-NMR和可变温度傅立叶变换红外光谱法确定银(I)n-链烷酸酯的同源系列(n c = 8–20,包括Nc)的分子和晶格结构。这些化合物在单斜晶体系统中结晶,该链具有完全延伸的全反式构象的烃链。此外,链条大约倾斜。相对于金属基面为75°,在层状结构中以甲基(尾)-甲基(尾)双层形式排列。来自双层中不同层的甲基链末端不重叠,但如此接近以引起甲基-甲基相互作用。在一个分子中,两个羧酸根基团以顺式-顺式结合型将双齿模式桥接至两个银原子以形成八元结构。分子内的银-银和分子间的Ag-O-Ag相互作用稳定了头基并促进了层状聚合物片的形成。尽管这些化合物几乎是同构的,但由于晶格内烃链的堆积差异,在甲基,不寻常的羧酸根(头部)基团的密度,反对称拉伸振动中观察到了奇偶链交替。这些是由不在同一平面上的聚合物片之间的相对垂直距离引起的。因此,对于奇数链长的化合物,其中这些距离
Antimicrobial polymer compositions and the use thereof
申请人:Emeta Modesto
公开号:US20060263330A1
公开(公告)日:2006-11-23
An antimicrobial composition comprising: a complex of an anionic polyester with an antimicrobial metal wherein the anionic polyester has at least one carboxylic acid group. A medical device having an antimicrobial composition comprising: a complex of an anionic polyester with an antimicrobial metal wherein the anionic polyester has at least one carboxylic acid group.
The present invention comprises compositions and methods for providing antimicrobial compositions. The antimicrobial compositions comprise gel delivery vehicles comprising stabilized silver, wherein ionic silver is provided to a site for antimicrobial purposes. Methods of making and using such compositions are taught, including application of the silver-containing gel compositions to wounds, burns, abrasions, cuts, surgical incision, sites where skin or organ integrity has been breached, and other sites to supply an antimicrobial environment.
[EN] NEW PHENYL-TETRAHYDROISOQUINOLINE DERIVATIVES<br/>[FR] NOUVEAUX DÉRIVÉS DE PHÉNYL-TÉTRAHYDROISOQUINOLINE
申请人:HOFFMANN LA ROCHE
公开号:WO2013156423A1
公开(公告)日:2013-10-24
The invention provides novel compounds having the general formula (I) wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, A and n are as described herein, compositions including the compounds and methods of using the compounds.