Triarylverdazyl radicals as promising redox-active components of rechargeable organic batteries
作者:S. G. Kostryukov、O. Yu. Chernyaeva、B. S. Tanaseichuk、A. Sh. Kozlov、M. K. Pryanichnikova、A. A. Burtasov
DOI:10.1007/s11172-020-2905-5
日期:2020.7
verdazyl radicals bearing various substituents is proposed. 3-Positioned aromaticsubstituents at the verdazyl moiety affect the reduction potentials and almost do not affect the oxidation potential, while 1-positioned aromaticsubstituents affect contrariwise the oxidation potential of this radical without any influence on the reduction potential. The acquired electrochemical data allowed us to reveal the
Highly Selective Single‐Component Formazanate Ferrate(II) Catalysts for the Conversion of CO
<sub>2</sub>
into Cyclic Carbonates
作者:Aeilke J. Kamphuis、Francesca Milocco、Luuk Koiter、Paolo P. Pescarmona、Edwin Otten
DOI:10.1002/cssc.201900740
日期:2019.8.8
anionic mono(formazanate) iron(II) complexes bearing labile halide ligands, which possess both Lewis acidic and nucleophilic functionalities, have been developed as novel single‐component homogeneous catalysts for the reaction of CO2 with epoxides to produce cyclic carbonates. The influence of the halide ligand and the electronic properties of the formazanate ligand backbone on the catalytic activity
Microwave mediated solvent free synthesis of formazans catalyzed by simple ionic liquids derived from dialkylammonium salts
作者:Pranab Jyoti Das、Jesmin Begum
DOI:10.1039/c5ra06363a
日期:——
Microwave assisted solvent free one pot synthesis of formazans, catalysed by ionic liquid is reported for the first time.
首次报道了离子液体催化的微波辅助无溶剂一锅法合成甲醛胺。
Nano BF3·SiO2: A green heterogeneous solid acid for synthesis of formazan dyes under solvent-free condition
作者:Abdolhamid Bamoniri、Bi Bi Fatemeh Mirjalili、Naimeh Moshtael-Arani
DOI:10.1016/j.molcata.2014.06.024
日期:2014.11
A solvent-free, efficient and rapid approach for synthesis of formazan dyes was developed by diazotization of aromatic amines with NaNO2, nano silica-supported borontrifluoride (nano BF3·SiO2), then diazo coupling with aldehyde phenylhydrazones by grinding method at room temperature. This study aimed to overcome the limitations and drawbacks of the previous reported methods such as: low temperature
Electronic Control of Spin-Crossover Properties in Four-Coordinate Bis(formazanate) Iron(II) Complexes
作者:Francesca Milocco、Folkert de Vries、Imke M. A. Bartels、Remco W. A. Havenith、Jordi Cirera、Serhiy Demeshko、Franc Meyer、Edwin Otten
DOI:10.1021/jacs.0c10010
日期:2020.11.25
saturated metal centers in octahedral ligand environments. Spin-crossover complexes with low coordination numbers are much rarer. Here we report a series of four-coordinate, (pseudo)tetrahedral Fe(II) complexes with formazanate ligands and demonstrate how electronic substituent effects can be used to modulate the thermallyinducedtransition between S = 0 and S = 2 spin states in solution. All six compounds
d 区金属配合物中自旋态之间的转变对其结构和反应性具有重要影响,其应用范围从信息存储材料到了解金属酶的催化活性。通过空间和/或电子效应调整配体场 (ΔO) 为元素周期表中的几种过渡金属提供了自旋交叉化合物,但这主要限于八面体配体环境中的配位饱和金属中心。具有低配位数的自旋交叉复合物要少得多。在这里,我们报告了一系列四配位、(伪)四面体 Fe(II) 与甲酸盐配体的配合物,并展示了如何使用电子取代基效应来调节溶液中 S = 0 和 S = 2 自旋态之间的热诱导转变。所有六种化合物在高于室温 (300–368 K) 的 T1/2 溶液中都会发生自旋交叉。虽然 X 射线晶体学的结构分析表明,这些化合物中的大多数在固态下是低自旋的(并且在加热时保持不变),但我们发现堆积效应可以超越这种偏好并产生严格的高自旋( 6) 或逐渐自旋交叉行为 (5) 也在固态。密度泛函理论计算用于描述溶液自旋交叉热力学