42345-73-3Relevant academic research and scientific papers
Gold incorporated hematite nanocatalyst for solvent-free CO2fixation under atmospheric pressure
Tudu, Gouri,Ghosh, Sourav,Biswas, Tanmoy,Mahalingam, Venkataramanan
, p. 11887 - 11894 (2020)
We have developed an efficient one-pot synthesis strategy for the preparation of hematite (α-Fe2O3) and gold-integrated hematite (Au/α-Fe2O3) nanocatalysts. The nanostructured hematite along with tetrabutylammonium iodide (TBAI) has emerged as a proficient catalyst-combination for the reaction between carbon dioxide (CO2) and epoxide to form cyclic carbonate with 77% conversion under atmospheric CO2 pressure and solvent-free conditions. The catalytic activity of hematite further improved on the incorporation of a miniscule amount of gold (Au) into the hematite system. The as-prepared Au/α-Fe2O3 nanocatalyst with TBAI is found to be very efficient for the CO2 fixation reaction with 91% conversion under the optimized reaction conditions. The excellent catalytic activity of Au/α-Fe2O3 is attributed to the synergistic effect between α-Fe2O3 and Au species for the efficient fixation of CO2. Furthermore, the recyclability and post catalytic analysis imply the robust nature of the heterogeneous Au/α-Fe2O3 nanocatalyst.
Organosilicon functionalized glycerol carbonates as electrolytes for lithium-ion batteries
Wang, Jinglun,Yong, Tianqiao,Yang, Jianwen,Ouyang, Chuying,Zhang, Lingzhi
, p. 17660 - 17666 (2015)
Two triethoxyl-/trimethoxyl-silyl functionalized glycerol carbonates and one disiloxanyl functionalized glycerol carbonate were synthesized through a cycloaddition reaction of carbon dioxide with allyl glycidyl ether followed by a hydrosilylation with the corresponding hydrosilanes. Their chemical structures were fully characterized by 1H and 13C nuclear magnetic resonance (NMR) spectroscopy and their basic physicochemical properties including dielectric constant, viscosity, ionic conductivity, apparent lithium transference number and electrochemical window, were systematically measured. Trimethoxysilyl functionalized glycerol carbonate as electrolyte solvent with LiPF6 (0.6 M) and lithium oxalyldifluoroborate (0.4 M) binary salts exhibited good cycling stability over 2.7-4.4 V in high-voltage-LiCoO2/graphite full cells. Disiloxane functionalized glycerol carbonate acted as an efficient electrolyte additive to improve the wetting property on the separator in Li/LiCoO2 cells. This journal is
Novel porous organocatalysts for cycloaddition of CO2 and epoxides
Kolle, Joel M.,Sayari, Abdelhamid
, p. 24527 - 24538 (2019)
Three classes of organosilicas (DMO, OMOs and PMOs) containing immobilized multi-hydroxyl bis-(quaternary ammonium) iodide salts were prepared and tested in the cycloaddition of CO2 and epoxides. Owing to its higher surface area, pore volume an
Synthesis method of carbonate functionalized silane
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Paragraph 0023-0043, (2021/11/27)
The invention discloses a synthesis method of a carbonate functionalized silane, relates to the technical field of battery electrolyte additives, and relates to the technical field of battery electrolyte additives. To the synthesis method of the carbonate functionalized silane, by changing the carbon dioxide pressure parameter of the raw material usage and, the synthesis method of the carbonate functionalized silane is improved, and the final product yield and purity are improved by increasing the pressure of carbon dioxide in the reaction kettle and changing the tetrabutylammonium bromide amount.
Triazine-based Organic Polymer-catalysed Conversion of Epoxide to Cyclic Carbonate under Ambient CO2 Pressure
Biswas, Tanmoy,Halder, Arjun,Paliwal, Khusboo S.,Mitra, Antarip,Tudu, Gouri,Banerjee, Rahul,Mahalingam, Venkataramanan
, p. 1683 - 1687 (2020/05/05)
In this work we have achieved epoxide to cyclic carbonate conversion using a metal-free polymeric catalyst under ambient CO2 pressure (1.02 atm) using a balloon setup. The triazine containing polymer (CYA-ANIS) was prepared from cyanuric chloride (CYA?Cl) and o-dianisidine (ANIS) in anhydrous DMF as solvent by refluxing under the N2 gas environment. The presence of triazine and amine functional groups in the polymer results in the adsorption of CO2 up to 7 cc/g at 273 K. This inspired us to utilize the polymer for the conversion of a series of functionalised epoxides into their corresponding cyclic carbonates in the presence of tetrabutyl ammonium iodide (TBAI) as co-catalyst. The product has wide range of applications like solvent in lithium ion battery, precursor for polycarbonate, etc. The catalyst was efficient for the conversion of different mono and di-epoxides into their corresponding cyclic carbonates under atmospheric pressure in the presence of TBAI as co-catalyst. The study indicates that epoxide attached with electron withdrawing groups (like, CH2Cl, glycidyl ether, etc.) displayed better conversion compared to simple alkane chain attached epoxides. This is mainly due to the stabilization of electron rich intermediates produced during the reaction (e. g. epoxide ring opening or CO2 incorporation into the halo-alkoxide anion). This catalyst mixture was capable to maintain its reactivity up to five cycles without losing its activity. Post catalytic characterization clearly supports the heterogeneous and recyclable nature of the catalyst.
Efficient DMF-catalyzed coupling of epoxides with CO2 under solvent-free conditions to afford cyclic carbonates
Jiang, Jia-Li,Hua, Ruimao
, p. 3141 - 3148 (2007/10/03)
To develop a simple, low-molecule, and cost-effective organocatalyst for the coupling of epoxides with CO2, we have screened this coupling reaction in different organic solvents and found that DMF is an efficient organic catalyst for the coupling of epoxides with CO2 to give cyclic carbonates in high yield. In some cases, the catalytic activity of DMF can be significantly increased by the addition of catalytic amount of H2O. Copyright Taylor & Francis Group, LLC.
