نتایج جستجو برای: anion

تعداد نتایج: 33479  

Journal: :Journal of Molecular Liquids 2021

Isothermal and dynamic methodologies were used to study the thermal degradation of 8 novel fatty acid anion-based ionic liquids (FAILs): methyltrioctylammonium hexanoate [N8,8,8,1][C6:0], octanoate [N8,8,8,1][C8:0], tetrahexylammonium [N6,6,6,6][C8:0], laurate [N8,8,8,1][C12:0], palmitate [N8,8,8,1][C16:0], [N6,6,6,6][C16:0], stearate [N8,8,8,1][C18:0] oleate [N8,8,8,1][C18:1]. The stability th...

Journal: :Malaysian Journal of Science. Series B, Physical & Earth Sciences 2021

In KCl crystals, the 2s energy level of F-center within an anion-cation vacancy pair has been proposed as a suitable trap for thermoluminescence (TL) emission. It is further seen that – situated in cation anion large depth. The observed depth explainable on basis Herman and Barnett model, modified presently supports bi-vacancy configuration traps lattice.

Journal: :Dalton transactions 2006
Gemma L Moxham Thomas M Douglas Simon K Brayshaw Gabriele Kociok-Köhn John P Lowe Andrew S Weller

Iridium hydridophosphine complexes of general formula [Ir(PR3)2H2(anion)](PR3= PPh3, PMe2Ph; anion =[1-closo-CB(11)H(6)Cl(6)]-, [1-closo-CB(11)H(6)I(6)]-, [BAr(F)4]-) have been prepared by hydrogenation of cyclooctadiene precursor complexes. Solid-state structures of selected examples of these complexes reveal intimate contacts between the carborane anion and cation, with the anion binding thro...

Journal: :Chemical communications 2014
Ranjan Dutta Pradyut Ghosh

This Feature Article covers recent developments in anion induced capsular self-assemblies, with particular focus on important reports from 2011 to 2013. Contemporary studies on the capsular binding of environmentally and biologically relevant anions in aqueous medium are described. Emerging reports of such systems reveal their potential utility towards various functional aspects like anion sepa...

Journal: :Physical chemistry chemical physics : PCCP 2016
David Quiñonero Ibon Alkorta José Elguero

Stable minima showing halogen bonds between charged molecules with the same sign have been explored by means of theoretical calculations. The dissociation transition states and their corresponding barriers have also been characterized. In all cases, the results indicate that the complexes are thermodynamically unstable but kinetically stable with respect to the isolated monomers in gas phase. A...

2016
Genggongwo Shi Zahra Aliakbar Tehrani Dongwook Kim Woo Jong Cho Il-Seung Youn Han Myoung Lee Muhammad Yousuf Nisar Ahmed Bahareh Shirinfar Aaron J. Teator Dominika N. Lastovickova Lubna Rasheed Myoung Soo Lah Christopher W. Bielawski Kwang S. Kim

Since the aliphatic C-H···anion interaction is relatively weak, anion binding using hydrophobic aliphatic C-H (Cali-H) groups has generally been considered not possible without the presence of additional binding sites that contain stronger interactions to the anion. Herein, we report X-ray structures of organic crystals that feature a chloride anion bound exclusively by hydrophobic Cali-H group...

Journal: :Tribology International 2021

This work reports thermal stability, traction and tribofilm formation properties of three fatty acid-derived ionic liquids (FAILs) evaluates the influence chemical structure anion on indicated above. The results that stability FAILs is related with (longer alkyl chain length increases presence double bond decreases it). At high temperatures low speeds, [N 8,8,8,1 ][C 6:0 ] led to lowest values ...

2013
Manpreet Kaur Jerry P. Jasinski Amanda C. Keeley H. S. Yathirajan B. P. Siddaraju

In the title salt, C(18)H(24)NO(+)·C(6)H(7)O(7) (-), the dihedral angle between the benzene rings in the cation is 74.2 (5)°. In the crystal, anion-anion O-H⋯O hydrogen bonds and weak O-H⋯O inter-actions form infinite chains along [100]. Between these chains, cation-anion N-H-O hydrogen bonds are observed, forming an alternate pattern of cation and anion layers and leading to a two-dimensional ...

2010
Alba Campo-Cacharrón Enrique M. Cabaleiro-Lago Jesús Rodríguez-Otero

The process of anion transport trough a synthetic ion channel based in anion···π interactions is studied by means of computational methods. Employing two models for the units forming the channel, the calculations indicate that stable complexes are formed with any of bromide, chloride, fluoride or hydroxide anions. All these complexes exhibit strong interactions in the gas phase. When studied in...

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