1
|
Zhu Z, He X, Lv J, Xiao H, Pu Y, Hong J, Zeng K, Hu J, Yang G. Dicyanoimidazole resin with bisphenol A moiety: Synthesis, processing, properties, and composites. J Appl Polym Sci 2022. [DOI: 10.1002/app.53499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zhengzhu Zhu
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering Sichuan University Chengdu People's Republic of China
| | - Xian He
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering Sichuan University Chengdu People's Republic of China
| | - Jiangbo Lv
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering Sichuan University Chengdu People's Republic of China
| | - Hang Xiao
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering Sichuan University Chengdu People's Republic of China
| | - Yu Pu
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering Sichuan University Chengdu People's Republic of China
| | - Jinlang Hong
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering Sichuan University Chengdu People's Republic of China
| | - Ke Zeng
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering Sichuan University Chengdu People's Republic of China
| | - Jianghuai Hu
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering Sichuan University Chengdu People's Republic of China
| | - Gang Yang
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering Sichuan University Chengdu People's Republic of China
| |
Collapse
|
2
|
Hu J, Xie H, Zhu Z, Yang W, Tan W, Zeng K, Yang G. Reducing the melting point and curing temperature of aromatic cyano-based resins simultaneously through a Brønsted acid-base synergistic strategy. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124745] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
3
|
Zhu Z, He X, Tan W, Hong J, Liao S, Lv J, Zeng K, Hu J, Yang G. A new class of high-performance thermoset resins using dicyanoimidazole (DCI) as crosslinking group: A key demo of synthesis, curing behavior and thermal properties. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124264] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
4
|
Smetana V, Kelley SP, Titi HM, Hou X, Tang SF, Mudring AV, Rogers RD. Synthesis of Anhydrous Acetates for the Components of Nuclear Fuel Recycling in Dialkylimidazolium Acetate Ionic Liquids. Inorg Chem 2020; 59:818-828. [PMID: 31841315 DOI: 10.1021/acs.inorgchem.9b03077] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A series of anhydrous acetate salts with uranium {[C2C1im][UO2(OAc)3] (1), [C2C2im][UO2(OAc)3] (2), and [C4C1im][UO2(OAc)3] (3)}, lanthanides {[C2C2im]2[La(OAc)5] (4) and [C2C1im]2[Nd(OAc)5] (5)}, and strontium {[C2C1im]n[Sr(OAc)3]n (6)} (where C2C1im = 1-ethyl-3-methylimidazolium, C2C2im = 1,3-diethylimidazolium, C4C1im = 1-butyl-3-methylimidazolium, and OAc = acetate) have been prepared and structurally characterized. Both lanthanides and strontium are common components of the nuclear fuel waste, and their separation from uranium is an important but still challenging task. A new synthetic approach with dialkylimidazolium acetate ionic liquids (ILs) as the solvent has been developed for the direct synthesis of homoleptic acetates from the corresponding hydrates and, unexpectedly, hardly soluble f-element oxides. Although the group of characterized compounds shows perfect structural variability, all actinide and lanthanide metal ions form monomeric complex anions where the metal cation coordinates to five ligands including two oxygen atoms in the case of uranium, as is commonly observed for uranyl compounds. Crystallographic analyses revealed that the complex [UO2(OAc)3]- anions possess rather standard D3h symmetry featuring a hexagonal-bipyramidal coordination environment, while the lanthanide anions [Ln(OAc)5]2- are fully asymmetric and the Ln3+ cations are 10-coordinated in the form of a distorted bicapped tetragonal antiprism. This is the first report of lanthanide ions coordinated in this fashion. For Sr2+, 9-fold coordination through oxygen atoms in the form of a strongly distorted tricapped trigonal prism is observed. The crystallization of anhydrous, homoleptic, anionic acetate complexes from such a large variety of different metal salts appears to be due to the properties of dialkylimidazolium acetate ILs themselves, including enhanced basicity from the high concentration of free anions and their greater affinity for hydrogen-bonding solutes relative to metal cations.
Collapse
Affiliation(s)
- Volodymyr Smetana
- Department of Materials and Environmental Chemistry , Stockholm University , Svante Arrhenius väg 16 C , 10691 Stockholm , Sweden
| | - Steven P Kelley
- College of Arts & Sciences , The University of Alabama , Tuscaloosa , Alabama 35487 , United States
| | - Hatem M Titi
- Department of Chemistry , McGill University 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada
| | | | | | - Anja-Verena Mudring
- Department of Materials and Environmental Chemistry , Stockholm University , Svante Arrhenius väg 16 C , 10691 Stockholm , Sweden
| | - Robin D Rogers
- Department of Materials and Environmental Chemistry , Stockholm University , Svante Arrhenius väg 16 C , 10691 Stockholm , Sweden.,College of Arts & Sciences , The University of Alabama , Tuscaloosa , Alabama 35487 , United States.,Department of Chemistry , McGill University 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada
| |
Collapse
|
5
|
Cheng M, Cheng S. The crystal structure of hexakis(1-isopropyl-1H-imidazole-κ1N)copper(II) dichloride, C36H58Cl2CuN12. Z KRIST-NEW CRYST ST 2019. [DOI: 10.1515/ncrs-2019-0432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractC36H58Cl2CuN12, monoclinic, P21/c (no. 14), a = 8.1490(8) Å, b = 17.0301(15) Å, c = 16.8649(14) Å, β = 101.629(3)°, Z = 2, V = 2292.4(4) Å3, Rgt(F) = 0.0419, wRref(F2) = 0.1121, T = 298(2) K.
Collapse
Affiliation(s)
- Miao Cheng
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252000, Shandong, China
| | - Shuang Cheng
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252000, Shandong, China
| |
Collapse
|
6
|
Activation of the Cyano Group at Imidazole via Copper Stimulated Alcoholysis. INORGANICS 2019. [DOI: 10.3390/inorganics7070087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Reactions of 4,5-dicyano-1-methylimidazole with CuX2 (X = Cl, Br) in alcohol solvents (ethanol and methanol) resulted in the formation of Cu(II) carboximidate complexes [CuCl2(5- cyano-4-C(OEt)N-1-methylimidazole)(EtOH)] (1), [Cu2(µ-Cl)2Cl2(5-cyano-4-C(OMe)N-1-methylimidazole)2] (2), [Cu2(µ-Br)2Br2(5-cyano-4-C(OMe)N-1-methylimidazole)2] (3), and [Cu2(µ-Br)2Br2(5-cyano-4-C(OEt)N-1-methylimidazole)2] (4). The structures were determined by the X-ray crystallographic method, and further spectroscopic and computational methods were employed to explain the structural features. The solvent contributed to the alcoholysis reaction of the cyano group, as the result of which the ligand coordinated to the metal center in bidentate mode forming a five-membered chelating ring. In 1, the solvent also acts as an additional ligand, which coordinates to the metal center of a monomeric complex. In compounds 2–4, two halogen ligands link the metal atoms forming dihalo-bridged copper dimers. The infrared absorption characteristics were verified by simulation of the infrared spectra at the density functional theory level. In addition, the electronic absorption characteristics were explained by simulation of the UV–Vis spectra using the TD-DFT method. Molecular modelling at the DFT level was performed to study the effects of halogen type and steric hindrance of the alkoxy groups in forming the copper(II) complexes.
Collapse
|
7
|
Easton ME, Choudhary H, Rogers RD. Azolate Anions in Ionic Liquids: Promising and Under-Utilized Components of the Ionic Liquid Toolbox. Chemistry 2019; 25:2127-2140. [PMID: 30230057 DOI: 10.1002/chem.201802957] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 08/28/2018] [Indexed: 12/26/2022]
Abstract
Owing to their ease of synthesis, diffuse positive charge, and chemical stability, 1-alkyl-3-methylimidazolium cations (i.e., [Cn mim]+ ) are one of the most routinely utilized and historically important components in ionic liquid (IL) chemistry. However, while this is a routinely encountered member of the IL family as cations, relatively few workers have explored the versatile chemistry of azoles to allow their use as an anionic component in ILs, as azolates. Azolate anions possess many of the desired properties for IL formation, including a diffuse ionic charge, tailorable asymmetry, and synthetic flexibility, with the added advantages of not relying on halogen atoms for electron-withdrawing effects, as is commonly encountered with IL anions such as hexafluorophosphate. This review explores the 122 azolate-containing ILs known in the literature (prepared from only 39 disparate azolate anions), with a view to highlighting not only their demonstrated utility as an IL component, but the ways in which the larger scientific community may utilize their advantageous properties for new tailored materials.
Collapse
Affiliation(s)
- Max E Easton
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada
| | - Hemant Choudhary
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.,College of Arts & Sciences, The University of Alabama, Box 870336, Tuscaloosa, AL, 35487, USA
| | - Robin D Rogers
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.,College of Arts & Sciences, The University of Alabama, Box 870336, Tuscaloosa, AL, 35487, USA
| |
Collapse
|
8
|
Reid JESJ, Bernardes CES, Agapito F, Martins F, Shimizu S, Minas da Piedade ME, Walker AJ. Structure-property relationships in protic ionic liquids: a study of solvent-solvent and solvent-solute interactions. Phys Chem Chem Phys 2018; 19:28133-28138. [PMID: 29022017 DOI: 10.1039/c7cp05076c] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ionic nature of a functionalized protic ionic liquid cannot be rationalized simply through the differences in aqueous proton dissociation constants between the acid precursor and the conjugate acid of the base precursor. The extent of proton transfer, i.e. the equilibrium ionicity, of a tertiary ammonium acetate protic ionic liquid can be significantly increased by introducing an hydroxyl functional group on the cation, compared to the alkyl or amino-functionalized analogues. This increase in apparent ionic nature correlates well with variations in solvent-solute and solvent-solvent interaction parameters, as well as with physicochemical properties such as viscosity.
Collapse
Affiliation(s)
- Joshua E S J Reid
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | | | | | | | | | | | | |
Collapse
|
9
|
Titi HM, Kelley SP, Easton ME, Emerson SD, Rogers RD. Formation of ionic co-crystals of amphoteric azoles directed by the ionic liquid co-former 1-ethyl-3-methylimidazolium acetate. Chem Commun (Camb) 2017; 53:8569-8572. [PMID: 28715010 DOI: 10.1039/c7cc04429a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate was utilized as a liquid-state crystallization agent to form ionic co-crystals using amphoteric azoles selected as model compounds for active pharmaceutical ingredients. Weakly acidic azoles crystallize the IL relatively quickly, while stronger acidic azoles undergo slower ion exchange with the IL to form salts.
Collapse
Affiliation(s)
- Hatem M Titi
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.
| | - Steven P Kelley
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.
| | - Max E Easton
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.
| | - Stephen D Emerson
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487, USA
| | - Robin D Rogers
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada. and Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487, USA and 525 Solutions, Inc., 720 2nd Street, Tuscaloosa, AL 35401, USA
| |
Collapse
|