‘Layered hydrogenselenite’ I. Synthesis, structure redetermination of [Cu(HSeO3)2(H2O)2] and determination of [Cu(HSeO3)2(NO3)2]2−·2NH4+,NH4NO3. Structural relationships of these complexes with [Cu(HSeO3)2]
作者:A.M. Lafront、J.C. Trombe
DOI:10.1016/0020-1693(95)04500-9
日期:1995.6
followed by [Cu(HSeO 3 ) 2 (NO 3 ) 2 ] 2− ·2NH 4 + NH 4 NO 3 . The complex [Cu(HSeO 3 ) 2 (H 2 O) 2 ] was previously inadvertenly described as [Cu(HSeO 3 ) 2 (H 2 O)]. It structure has been redetermined along with the structure of the new complex [Cu(HSeO 3 ) 2 (NO 3 ) 2 ] 2− ·2NH 4 + ,NH 4 NO 3 . In both structures the copper atoms and the bridging HSeO 3 − build similar sheets which are interconnected by
摘要描述了两种铜氢硒沸石的合成条件。在没有NH 4 NO 3或没有NH 4 NO 3的系统CuO = SeO 2 = HNO 3 = H 2 O的情况下,观察到以下取决于pH值降低的相:在不存在NH 4 NO 3的情况下,[CuSeO 3 (H 2 O)2],接着是[Cu(HSeO 3)2]和[Cu(HSeO 3)2(H 2 O)2];在NH 4 NO 3的存在下,[CuSeO 3(H 2 O)2]然后是[Cu(HSeO 3)2(NO 3)2] 2-·2NH 4 + NH 4 NO 3。先前将络合物[Cu(HSeO 3)2(H 2 O)2]误描述为[Cu(HSeO 3)2(H 2 O)]。它的结构已与新配合物[Cu(HSeO 3)2(NO 3)2] 2··2NH 4 +,NH 4 NO 3的结构一起重新确定。在这两种结构中,铜原子和桥接的HSeO 3-都形成了相似的薄片,这些薄片通过氢键相互连接。[Cu(HSeO
Structural motifs in heteroleptic copper and cadmium selenites
(TMEDA) react with Na2SeO3 to produce the heteroleptic selenite copper compound of formula [Cu3(TMEDA)3(SeO3)2(H2O)4](NO3)2. In the cationic moiety two copper atoms are linked by two selenite anions through the O–Se–O bridge. One of the two bridging selenite anion coordinates to a third copper atom through the third oxygen atom. Reaction of Cd(CH3COO)2·2H2O with Na2SeO3 in the presence of ligand with
摘要在二胺配体(如四甲基乙基己二胺(TMEDA))存在下,Cu(II)阳离子与Na2SeO3反应生成式[Cu3(TMEDA)3(SeO3)2(H2O)4](NO3)2的亚硒铜化合物。在阳离子部分,两个铜原子通过O-Se-O桥被两个亚硒酸根阴离子连接。两个桥接亚硒酸盐阴离子中的一个通过第三氧原子配位至第三铜原子。Cd(CH3COO)2·2H2O与Na2SeO3在配体如硫脲[(NH2)2CS; tu]或selenourea [(NH2)2CSe; 水溶液中得到tu [td] 2 SeO 3} 2的配合物,其结构已通过X射线衍射分析得以阐明。这是第一个报道的亚硒酸镉分子复合物的例子。通过四个辅助硫脲软配体的配合作用而稳定的两个镉阳离子,通过O和O-Se-O桥的两个桥连亚硒酸盐离子连接在一起。还报道了在那些镉和铜络合物以及无机延伸的CdSeO3和水合的CuSeO3相中亚硒酸盐离子的配位模式之间的比较。
INTERMEDIATES IN THE THERMAL DECOMPOSITION OF NORMAL COPPER(II), NICKEL(II) AND COBALT(II) SELENITE DIHYDRATES
作者:Adel A. A. Emara、Faten S. M. Abd El-Hameed、Saied M. E. Khalil
DOI:10.1080/10426509608046406
日期:1996.7.1
Abstract Thermaldecomposition of normal transition metal selenite dihydrates, MSeO2.2H2O; M [dbnd] Cu(II), Ni(II), Co(II) was traced by TGA/DTA measurements from 50–700°C. The thermal products were obtained by heating the selenites in an air-oven to different temperatures, as determined from TGA/DTA curves, where different coloured products are obtained. The structures of the start selenites and the
Thermal and thermodynamic data concerning the selenites from group IB in the periodic table
作者:G.G. Gospodinov、B.G. Bogdanov
DOI:10.1016/0040-6031(84)85031-5
日期:1984.5
Abstract The thermal dehydration of CuSeO 3 ·2 H 2 O, and the thermal dissociation of CuSeO 3 and Ag 2 SeO 3 are studied. The mechanism of these processes is suggested. The heats of phase transitions and the specific heats of the corresponding compounds are determined.
摘要 研究了CuSeO 3 ·2 H 2 O的热脱水、CuSeO 3 和Ag 2 SeO 3 的热解离。建议了这些过程的机制。测定相变热和相应化合物的比热。
Carbon dots-incorporated CuSeO3 rationally regulates activity and selectivity of the hydrogen species via light-converted electrons
作者:Yuqi Ren、Hongxu Zhang、Caihong Hao、Qing Chang、Ning Li、Jinlong Yang、Shengliang Hu
DOI:10.1016/j.cclet.2023.108225
日期:2023.2
when excellent selectivity is guaranteed. We here present a novel photocatalyst combining amino-functionalized carbon dots (N-CDs) with copper selenite nanoparticles (N-CDs@CuSeO3) for simultaneously improving selectivity and activity. Under visiblelight irradiation, the prepared N-CDs@CuSeO3 exhibits 100% catalytic selectivity for the formation of 4-aminostyrene at full conversion of 4-nitrostyrene