Alkali metal ions transfer across the water/1,2-dichloroethane interface facilitated by a series of crown ethers

National Basic Research Program of China [2011CB933700, 2012CB932900]; National Science Foundation of China [NSFC21061120456, 21021002, 20973142]; National Project 985 of High Education; Chinese GovernmentThe facilitated transfer of alkali metal ions (Li+ and Na+) across the water/1,2-dichloroethane (W/1,2-DCE) interface was studied by using a series of crown ethers as ionophores: 4'-ethynylbenzo-15-crown-5-ether (L1), 3',6'-diethynylbenzo-15-crown-5-ether (L2) and 4',5'-diethynylbenzo-15-crown-5-ether (L3). Cyclic voltammetry was employed to study the electrochemical behaviour of the facilitated ion transfer across the W/1,2-DCE interface supported at the tip of a micropipette. The diffusion coefficients of the ionophores in the 1,2-DCE phase were determined, while the metal-ligand complexes formed by these ions with all the ionophores were obtained to be in a 1 : 1 stoichiometric ratio. The association constants, log beta degrees, for complexes LiL1(+), LiL2(+), LiL3(+), NaL1(+), NaL2(+) and NaL3(+) were calculated to be 3.3, 4.2, 4.0, 2.1, 3.5 and 2.2, respectively. The theoretical calculations have shown that the conjugated constituent groups on the benzene ring have an essential effect on the spatial structures of the crown ether rings, which determine the supramolecular interaction between the ions and ionophores

Facilitated Li+ ion transfer across the water/1,2-dichloroethane interface by the solvation effect

National Basic Research Program of China [2012CB932902, 2009CB220100, 2011CB933700]; Open Foundation of State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University [2010-18]; Beijing Higher Institution Engineering Research Center of Power Battery and Chemical Energy Materials; National Science Foundation of China [20973142, 21061120456, 21021002]; Ministry of Science and Technology (MOST) of China [2010DFA72760]; US-China Collaboration on Cutting-edge Technology Development of Electric VehiclesWe demonstrate that the solvation effect can be the driving force for ion transfer across the water/1,2-dichloroethane interface. Voltammetric behaviours of facilitated Li+ ion transfer by the solvents of lithium-based batteries are investigated, which is valuable for the dual-electrolyte Li-air batteries, but also for the ion detection, separation and extraction

Electrochemical Synthesis of Silver-Tetracyanoquinodimethane Nanorods at Agar Supported Water/1,2-Dichloroethane Interface

具有高导电性和独特电学性质的金属有机络合物AgTCNQ是一种重要的电荷转移盐.本文采用琼脂作为胶凝剂构成水|1,2-二氯乙烷液液界面；施加电压时银离子由水相穿过水凝胶进入有机相，与TCNQ-反应生成AgTCNQ纳米棒.结果表明液/液界面电化学方法为合成有机金属功能材料的有效途径.Silver-tetracyanoquinodimethane (AgTCNQ) is an important charge transfer salt due to its high conductivity and other electronic properties. In this communication, we report the synthesis of AgTCNQ at the liquid/liquid interface. Agar was used as a gelling agent to support water/1,2-dichloroethane (DCE) interface. Silver ions were transferred from the hydrogel into DCE phase, where they combined with TCNQ- to form AgTCNQ nanorods. The developed method can provide a new route for synthesis of functional materials based on the electrochemistry at the liquid/liquid interface.This work was supported by National Science Foundation of China (No. 20973142, No. 21061120456, and No. 21021002), National Basic Research Program of China (2011CB933700) and the National Science Foundation (CHE-1026582; MVM).This work was supported by National Science Foundation of China (No. 20973142, No. 21061120456, and No. 21021002), National Basic Research Program of China (2011CB933700) and the National Science Foundation (CHE-1026582; MVM).作者联系地址：1. 厦门大学化学化工学院化学系, 福建厦门361005; 2. 厦门大学固体表面物理化学国家重点实验室, 福建厦门361005; 3. 纽约市立大学皇后学院化学与生物化学系袁美国纽约11367Author's Address: 1. Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China; 2. State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, Fujian, China; 3. Department of Chemistry and Biochemistry, Queens College-CUNY, Flushing, New York 11367, USA通讯作者E-mail：[email protected]

A novel planarization method based on photoinduced confined chemical etching

National Science Foundation of China [91023043, 21021002, 91023006]A photoinduced confined chemical etching system based on TiO2 nanotube arrays is developed for the planarization of the copper surface, which is proved to be a prospective stress-free chemical planarization method for metals and semiconductors

Electrochemical mechanical micromachining based on confined etchant layer technique

National Science Foundation of China [91023006, 91023047, 91023043, 21061120456, 21021002]; Natural Science Foundation of Fujian Province of China [2012J06004]; Fundamental Research Funds for the Central Universities [2010121022]; Scientific Research Foundation for the Returned Overseas Chinese Scholars (State Education Ministry)The confined etchant layer technique (CELT) has been proved an effective electrochemical microfabrication method since its first publication at Faraday Discussions in 1992. Recently, we have developed CELT as an electrochemical mechanical micromachining (ECMM) method by replacing the cutting tool used in conventional mechanical machining with an electrode, which can perform lathing, planing and polishing. Through the coupling between the electrochemically induced chemical etching processes and mechanical motion, ECMM can also obtain a regular surface in one step. Taking advantage of CELT, machining tolerance and surface roughness can reach micro-or nano-meter scale

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作者联系地址：厦门大学化学化工学院Author's Address: College of Chemistry and Chemical Engineering, Xiamen University通讯作者E-mail：[email protected]

Latest and Hot Papers

作者联系地址：厦门大学化学化工学院Author's Address: College of Chemistry and Chemical Engineering, Xiamen University通讯作者E-mail：[email protected]

Effect of Slag Compositions on Change Behavior of Nitrogen in Molten Steel

The problem of nitrogen pickup in the smelting process of the electric arc furnace (EAF) has not been solved well. Using seven slag–steel equilibrium experiments and theoretical analysis, the relation of the foaming index and optical basicity with the nitrogen capacity of slag was clarified. Meanwhile, the effect of slag composition on the equilibrium distribution ratio of nitrogen and the mass transfer coefficient of nitrogen pickup was also studied. The results show that, with the increase in slag basicity, the nitrogen pickup amount, nitrogen pickup rate, and nitrogen equilibrium distribution ratio LN increase. Increasing the foaming index of slag and reducing its optical basicity will increase the nitrogen capacity of slag, which is conducive to hindering the nitrogen pickup of molten steel. The relationship between slag optical basicity and nitrogen capacity can be expressed as lgCN = −5.59lgΛ − 12.41. With the increase in the Al2O3 content of slag, the nitrogen pickup amount of molten steel decreases and the nitrogen pickup rate decreases. The test with MgO = 7.5% showed the highest nitrogen pickup rate and the highest nitrogen pickup mass transfer coefficient, which were 0.21 × 10−4%/min and 1.97 × 10−4 cm/s, respectively. The test with Al2O3 = 7.5% in slag showed the lowest nitrogen pickup rate and the lowest nitrogen pickup mass transfer coefficient, which were 0.08 × 10−4%/min and 1.35 × 10−4 cm/s, respectively

Effect of Slag Compositions on Change Behavior of Nitrogen in Molten Steel

The problem of nitrogen pickup in the smelting process of the electric arc furnace (EAF) has not been solved well. Using seven slag–steel equilibrium experiments and theoretical analysis, the relation of the foaming index and optical basicity with the nitrogen capacity of slag was clarified. Meanwhile, the effect of slag composition on the equilibrium distribution ratio of nitrogen and the mass transfer coefficient of nitrogen pickup was also studied. The results show that, with the increase in slag basicity, the nitrogen pickup amount, nitrogen pickup rate, and nitrogen equilibrium distribution ratio LN increase. Increasing the foaming index of slag and reducing its optical basicity will increase the nitrogen capacity of slag, which is conducive to hindering the nitrogen pickup of molten steel. The relationship between slag optical basicity and nitrogen capacity can be expressed as lgCN = −5.59lgΛ − 12.41. With the increase in the Al2O3 content of slag, the nitrogen pickup amount of molten steel decreases and the nitrogen pickup rate decreases. The test with MgO = 7.5% showed the highest nitrogen pickup rate and the highest nitrogen pickup mass transfer coefficient, which were 0.21 × 10−4%/min and 1.97 × 10−4 cm/s, respectively. The test with Al2O3 = 7.5% in slag showed the lowest nitrogen pickup rate and the lowest nitrogen pickup mass transfer coefficient, which were 0.08 × 10−4%/min and 1.35 × 10−4 cm/s, respectively