Heterometal–organic framework with pcu net constructed from mixed linear ligands
作者:Wei-Hui Fang、Guo-Yu Yang
DOI:10.1039/c4ce00282b
日期:——
Cooperation of two linear organic ligands under hydrothermal conditions results in the formation of a porous heterometal–organic framework with two types of channels.
两种线性有机配体在水热条件下合作,形成了一个具有两种类型通道的多孙金属有机框架。
Unexpected Dimeric Spiro-Borate Complexes from Lewis-Acid Induced Transformation of Oxalatoborates
作者:Sven H. Zottnick、Jens R. Sorg、Jan A. P. Sprenger、Maik Finze、Klaus Müller-Buschbaum
DOI:10.1002/zaac.201600319
日期:2017.1
groups to the lanthanide ions in reactions with lanthanide chlorides and nitrates yielding the well-known lanthanideoxalates Ln2(C2O4)3·10H2O (Ln = La, Eu). In contrast, the reaction of anhydrous YCl3 with Li[B(C2O4)2] (lithium bis-oxalatoborate = Li[BOB]) in N,N-dimethylformamide (dmf) results in the formation of [B2O(C2O4)2(dmf)2] (2). Transfer of one oxalate group per boron onto the yttrium ion is revealed
On the use of oxalates as starting materials for low-temperature preparation of bronzes and other reduced phases
作者:P. Ganguly、N.Y. Vasanthacharya
DOI:10.1016/0025-5408(86)90014-0
日期:1986.4
A novel low-temperature method of preparing bronzes of tungsten and vanadium and otherreducedphases is reported.
报道了一种新的低温制备钨和钒等还原相青铜的方法。
Thermal decomposition of rare-earth-doped calcium oxalate. Part 1. Doping with lanthanum, samarium and gadolinium
作者:Usharani Patnaik、J. Muralidhar
DOI:10.1016/0040-6031(95)02394-1
日期:1996.3
Abstract The thermaldecomposition of calciumoxalate doped with lanthanum, samarium or gadolinium has been investigated using thermogravimetry (TG) and differential thermal analysis (DTA). The kinetics of the decomposition steps have been studied by the non-isothermal TG technique. The doped oxalatesdecompose in a similar way to pure CaOx. After dehydration, decomposition of doped oxalates proceeds in
摘要 使用热重法 (TG) 和差热分析 (DTA) 研究了掺杂镧、钐或钆的草酸钙的热分解。已经通过非等温 TG 技术研究了分解步骤的动力学。掺杂的草酸盐以类似于纯 CaOx 的方式分解。脱水后,掺杂的草酸盐的分解在两个重叠的放热阶段进行,即镧系元素草酸盐分解,然后是草酸钙分解。加热至 1000°C 的样品显示 CaO 和 Ln 2 O 3 存在于不同的相中。
Synthesis, characterization, and catalytic activity of LaRhO3
作者:H GYSLING
DOI:10.1016/0021-9517(87)90132-1
日期:1987.2
Lanthanum rhodate, LaRhO3, has been prepared by high-temperature reaction of the nitrates, prepared in situ from the corresponding oxides. Use of a slight excess of the rare-earth oxide, and removal of this component from the product with a warm, dilute acetic acid leach, provided the pure perovskite. The presence of pure monophasic material was confirmed by X-ray diffraction and X-ray photoelectron
罗丹酸镧LaRhO 3是通过硝酸盐的高温反应制备的,硝酸盐是由相应的氧化物就地制备的。使用稍微过量的稀土氧化物,并用温暖的稀乙酸浸出法从产品中除去该组分,得到纯净的钙钛矿。通过X射线衍射和X射线光电子能谱(XPS)证实了纯单相材料的存在。将用稍微过量的稀土氧化物制成的材料与用稍微过量的Rh 2 O 3制备的样品进行比较表明,过量的Rh 2 O 3不能通过浸提去除。这些研究表明,需要特别注意用于制备待评估为催化剂的固态材料的合成方法,以及XPS监测此类材料纯度的实用性。LaRhO 3的程序升温还原和XPS研究表明,与文献所述相反,在纯H 2或1:1 H 2:CO中加热该材料时,未观察到稳定的Rh +物种。观察到原始钙钛矿相对于纯H 2的还原具有一定的稳定性。LaRhO 3作为由合成气(即1:1 H)形成线性醇的催化剂的活性还报道了2:CO)以及用于乙烯加氢甲酰化。该结果意味着,在Rh发生含氧