Conversion of dilute CO2 to cyclic carbonates at sub-atmospheric pressures by a simple indium catalyst

2021 ◽  
Author(s):  
Hassan A. Baalbaki ◽  
Hootan Roshandel ◽  
Jason E. Hein ◽  
Parisa Mehrkhodavandi
Keyword(s):  
Ammonium Salt ◽  
Isotope Labeling ◽  
Cyclic Carbonates ◽  
Mechanistic Investigation ◽  
Indium Catalyst

A simple indium halide with an ammonium salt catalyst can catalyze effectively the cycloaddition of epoxide and dilute CO2. A detailed mechanistic investigation is conducted using kinetics, isotope labeling, and in situ NMR and IR experiments.

scholarly journals Indium-Catalyzed Direct Conversion of Lactones into Thiolactones Using a Disilathiane as a Sulfur Source

2018 ◽  
Author(s):  
Yohei Ogiwara ◽  
Ken Takano ◽  
Shuhei Horikawa ◽  
Norio Sakai
Keyword(s):  
Elemental Sulfur ◽  
Direct Conversion ◽  
Pharmaceutical Chemistry ◽  
Sulfur Source ◽  
Efficient Synthesis ◽  
Previous Reaction ◽  
Indium Catalyst

Indium-catalyzed reaction of lactones and a disilathiane leading to thiolactones is described. The direct synthesis of thiolactones from lactones with an appropriate sulfur source is one of the most attractive approaches in organic and pharmaceutical chemistry. In this context, we found an indium-catalyzed direct conversion of lactones into thiolactones in the presence of elemental sulfur and a hydrosilane via formation of the disilathiane in-situ. On the basis of the previous reaction, the application utilizing the disilathiane as a sulfur source was performed herein for the efficient synthesis of a variety of thiolactone derivatives from lactones by an indium-catalyst.

Direct synthesis of cyclic carbonates from olefins and CO2 catalyzed by a MoO2(acac)2-quaternary ammonium salt system

2011 ◽  
Vol 13 (9) ◽  
pp. 2518 ◽  
Author(s):  
Fawang Chen ◽  
Tao Dong ◽  
Tiegang Xu ◽  
Xiaofang Li ◽  
Changwen Hu
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Direct Synthesis ◽  
Salt System ◽  
Cyclic Carbonates

In Situ Mechanistic Investigation at the Liquid/Solid Interface by Attenuated Total Reflectance FTIR: Ethanol Photo-Oxidation over Pristine and Platinized TiO2 (P25)

ACS Catalysis ◽  
2011 ◽  
Vol 1 (8) ◽  
pp. 864-871 ◽  
Author(s):  
Dangguo Gong ◽  
Vishnu Priya Subramaniam ◽  
James G. Highfield ◽  
Yuxin Tang ◽  
Yuekun Lai ◽  
...  
Keyword(s):  
Attenuated Total Reflectance ◽  
Total Reflectance ◽  
Photo Oxidation ◽  
Solid Interface ◽  
Mechanistic Investigation ◽  
Reflectance Ftir

scholarly journals First in situ estimations of small phytoplankton carbon and nitrogen uptake rates in the Kara, Laptev, and East Siberian seas

2018 ◽  
Vol 15 (18) ◽  
pp. 5503-5517 ◽  
Author(s):  
P. Sadanandan Bhavya ◽  
Jang Han Lee ◽  
Ho Won Lee ◽  
Jae Joong Kang ◽  
Jae Hyung Lee ◽  
...  
Keyword(s):  
Sea Ice ◽  
Nitrogen Uptake ◽  
Isotope Labeling ◽  
N Uptake ◽  
The Arctic ◽  
Carbon And Nitrogen ◽  
Uptake Rates ◽  
Small Phytoplankton ◽  
C And N

Abstract. Carbon and nitrogen uptake rates by small phytoplankton (0.7–5 µm) in the Kara, Laptev, and East Siberian seas in the Arctic Ocean were quantified using in situ isotope labeling experiments; this research, which was novel and part of the NABOS (Nansen and Amundsen Basins Observational System) program, took place from 21 August to 22 September 2013. The depth-integrated carbon (C), nitrate (NO3-), and ammonium (NH4+) uptake rates by small phytoplankton ranged from 0.54 to 15.96 mg C m−2 h−1, 0.05 to 1.02 mg C m−2 h−1, and 0.11 to 3.73 mg N m−2 h−1, respectively. The contributions of small phytoplankton towards the total C, NO3-, and NH4+ varied from 25 % to 89 %, 31 % to 89 %, and 28 % to 91 %, respectively. The turnover times for NO3- and NH4+ by small phytoplankton found in the present study indicate the longer residence times (years) of the nutrients in the deeper waters, particularly for NO3-. Additionally, the relatively higher C and N uptake rates by small phytoplankton obtained in the present study from locations with less sea ice concentration indicate the possibility that small phytoplankton thrive under the retreat of sea ice as a result of warming conditions. The high contributions of small phytoplankton to the total C and N uptake rates suggest the capability of small autotrophs to withstand the adverse hydrographic conditions introduced by climate change.

scholarly journals Living β-selective cyclopolymerization using Ru dithiolate catalysts

2019 ◽  
Vol 10 (39) ◽  
pp. 8955-8963 ◽  
Author(s):  
Kijung Jung ◽  
Tonia S. Ahmed ◽  
Jaeho Lee ◽  
Jong-Chan Sung ◽  
Hyeyun Keum ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Kinetic Studies ◽  
Steric Factor ◽  
Rational Engineering ◽  
H Nmr ◽  
Mechanistic Investigation

Herein, we demonstrate the first example of living β-selective CP by rational engineering of the steric factor on monomer or catalyst structures, along with a mechanistic investigation by in situ kinetic studies using 1H NMR spectroscopy.

In-Situ Photochromism Switching with Crystal Jumping through the Deammoniation of N-Salicylideneaniline Ammonium Salt

2019 ◽  
Vol 19 (8) ◽  
pp. 4324-4331 ◽  
Author(s):  
Haruki Sugiyama ◽  
Kohei Johmoto ◽  
Akiko Sekine ◽  
Hidehiro Uekusa
Keyword(s):  
Ammonium Salt

An efficient CO2 fixation reaction with epoxides catalysed by in situ formed blue vanadium catalyst from dioxovanadium(+5) complex: moisture enhanced and atmospheric oxygen retarded catalytic activity

2020 ◽  
Vol 44 (6) ◽  
pp. 2547-2554 ◽  
Author(s):  
Rakhimoni Borah ◽  
Naranarayan Deori ◽  
Sanfaori Brahma
Keyword(s):  
Carbon Dioxide ◽  
Catalytic Activity ◽  
Co2 Fixation ◽  
Atmospheric Oxygen ◽  
Carbon Dioxide Fixation ◽  
Vanadium Catalyst ◽  
Cyclic Carbonates ◽  
Mild Conditions ◽  
Fixation Reaction

In situ formed vanadium(+4) species catalyzed carbon dioxide fixation reaction, leading to 99% conversion of epoxides to cyclic carbonates under mild conditions is reported here, along with the study on the in situ formed catalyst to some extent.

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