Two new 3D homoleptic binary imidazolates, Cd(im)2 and Hg(im)2
(Him = imidazole), as well as [Hg(im)]NO3, containing 1D polycations of [Hg(im)]nn+ formulation, have been prepared and characterized by ab-initio XRPD methods.
ZINC-IMIDAZOLE COMPLEX MIXED CATALYST AND METHOD FOR PRODUCING METHYL N-PHENYL CARBAMATE USING THE SAME
申请人:KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
公开号:US20200061596A1
公开(公告)日:2020-02-27
Disclosed is a zinc-imidazole complex mixed catalyst. Also disclosed are a method for preparing the zinc-imidazole complex mixed catalyst and a method for producing a methyl N-phenyl carbamate in high yield with high selectivity in the presence of the catalyst. The zinc-imidazole complex mixed catalyst can be reused due to its high reaction stability. In addition, the use of the zinc-imidazole complex mixed catalyst leads to a marked improvement in the production yield of a methyl N-phenyl carbamate with high selectivity.
Mechanochemical reactions of crystalline imidazole with 23 metallic oxides have been studied by milling in a mortar and in ball mill vibrators of low and high mechanical intensity. The reactions were monitored by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) techniques. ZnO, HgO, Ag2O, and Cu2O react rather readily in the mortar, forming the corresponding imidazolates but
结晶的咪唑与23种金属氧化物的机械化学反应已通过在低强度和高机械强度的研钵和球磨机振动器中研磨进行了研究。通过傅里叶变换红外光谱(FTIR)和X射线衍射(XRD)技术监测反应。ZnO,HgO,Ag 2 O和Cu 2 O在研钵中相当容易反应,形成相应的咪唑化物,但CdO,Ga 2 O 3和In 2 O 3需要进行强烈的机械铣削才能进行转化。CuO和NiO不会立即反应,但经过几个月的老化后会变成蓝色。Mg(II),Ca(II),Be(II),Al(III),Fe(II),Co(II),Co(III),Pb(II),Eu(III),Ce( III),Bi(III),Ti(IV),Zr(IV)和Sn(IV)即使在强力研磨数小时后仍对咪唑呈惰性。
Preparation method for zeolitic imidazolate frameworks
申请人:China University of Petroleum-Beijing
公开号:US10815253B2
公开(公告)日:2020-10-27
The present invention provides a preparation method for zeolitic imidazolate frameworks. The preparation method comprises: adding a metal carbonate or oxide, an organic ligand to a hydrophilic liquid to obtain a mixture; introducing an acidic gas to reach a reaction pressure of 0.1 MPa to 2.0 MPa, and reacting for a predetermined time; heating to 30° C.-60° C. and vacuuming to obtain the zeolitic imidazolate framework. The present invention also provides a zeolitic imidazolate framework obtained by the above preparation method. The preparation method according to the present invention is environmentally friendly and has a high yield.
A direct reaction approach for the synthesis of zeolitic imidazolate frameworks: template and temperature mediated control on network topology and crystal size
作者:Mónica Lanchas、Daniel Vallejo-Sánchez、Garikoitz Beobide、Oscar Castillo、Andrés T. Aguayo、Antonio Luque、Pascual Román
DOI:10.1039/c2cc34787c
日期:——
The direct acid–base reaction between ZnO/CoO/Co(OH)2 and imidazolic ligands under moderate heating (100–160 °C), in a closed vessel, leads to the generation of the corresponding zinc/cobalt-imidazolates in a high yield (87–97%) in which network topology is controlled by the addition of small amounts of structure directing agents. Moreover, the fine tuning of the thermal process at the synthetic stage permits us to increase the crystal size, and even to grow X-ray quality single crystals.
在密闭容器中,ZnO/CoO/Co(OH)2 和咪唑配体在适度加热(100-160 °C)条件下发生直接酸碱反应,生成相应的锌/钴咪唑盐,产率高(87-97%),其中的网络拓扑结构可通过添加少量结构引导剂进行控制。此外,在合成阶段对热过程进行微调,还可以增大晶体尺寸,甚至培育出 X 射线质量的单晶体。