Author
T. G. Srinivasan
Other affiliations: Lawrence Berkeley National Laboratory
Bio: T. G. Srinivasan is an academic researcher from Indira Gandhi Centre for Atomic Research. The author has contributed to research in topics: Nitric acid & Ionic liquid. The author has an hindex of 36, co-authored 92 publications receiving 3486 citations. Previous affiliations of T. G. Srinivasan include Lawrence Berkeley National Laboratory.
Topics: Nitric acid, Ionic liquid, Extraction (chemistry), Palladium, Uranium
Papers published on a yearly basis
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202 citations
TL;DR: In this paper, the current status of room temperature ionic liquid research related to the extraction of actinides and fission products (cesium and strontium) from nitric acid medium, with special emphasis on the studies carried out in our laboratory.
Abstract: Room temperature ionic liquids (RTILs) are receiving increased attention for possible applications in nuclear fuel cycle. RTILs are being investigated as possible substitutes to molecular diluents in solvent extraction, and as an alternative to high temperature molten salts in non-aqueous reprocessing applications. It is well recognized that ionic liquids often display unique extraction behavior. Unusual extraction of various metal ions has been reported in literature when RTILs are used as solvent medium. These aspects make the subject of RTILs fascinating and challenging. This review provides the current status of room temperature ionic liquid research related to the extraction of actinides and fission products (cesium and strontium) from nitric acid medium, with special emphasis on the studies carried out in our laboratory.
169 citations
TL;DR: In this paper, the diluent characteristics and wide electrochemical window of the room temperature ionic liquid (RTIL), 1-butyl-3-methylimidazolium bis(trifluoromethanesulphonyl)imide (bmimNTf2), has been exploited for the extraction of uranium (VI) from nitric acid medium using 1.1M TBP/bmim NTf2, followed by direct electrodeposition as uranium oxide from organic phase.
129 citations
TL;DR: The extraction of actinides in the absence of DMDOHEMA was insignificant and the distribution ratio achieved in conjunction with C(4)mimNTf(2), was remarkable.
117 citations
TL;DR: The electrochemical behavior of uranyl nitrate in 1-butyl-3-methylimidazolium chloride at glassy carbon working electrode has been investigated in the temperature range 343-373 K by transient electrochemical techniques.
113 citations
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TL;DR: Amphiphilic poly(phenylquinoline)-block-polystyrene rod-coil diblock copolymers were observed to self-organize into robust, micrometer-scale, spherical, vesicular, cylindrical, and lamellar aggregates from solution, but their size scale decreased with a decreasing fraction of the rigid-rod block.
Abstract: Amphiphilic poly(phenylquinoline)-block-polystyrene rod-coil diblock copolymers were observed to self-organize into robust, micrometer-scale, spherical, vesicular, cylindrical, and lamellar aggregates from solution. These diverse aggregate morphologies were seen at each composition, but their size scale decreased with a decreasing fraction of the rigid-rod block. Compared to coil-coil block copolymer micelles, the present aggregates are larger by about two orders of magnitude and have aggregation numbers of over 10(8). The spherical and cylindrical aggregates have large hollow cavities. Only spherical aggregates with aggregation numbers in excess of 10(9) were formed in the presence of fullerenes (C60, C70) in solution, resulting in the solubilization and encapsulation of over 10(10) fullerene molecules per aggregate.
824 citations
TL;DR: Fullerene is able to fit inside the hydrophobic cavity of HIV proteases, inhibiting the access of substrates to the catalytic site of the enzyme, and can be used as radical scavenger and singlet oxygen in high quantum yields.
798 citations
TL;DR: Ionic Liquids-Based Extraction: A Promising Strategy for theAdvanced Nuclear Fuel Cycle Xiaoqi Sun, Huimin Luo, and Sheng Dai.
Abstract: Ionic Liquids-Based Extraction: A Promising Strategy for theAdvanced Nuclear Fuel Cycle Xiaoqi Sun, Huimin Luo, and Sheng Dai* Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States Energy and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37916, United States State Key Laboratory of Rare Earth Resource Utilization, Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
719 citations
TL;DR: The results indicate that the active oxygen species primarily responsible for photoinduced DNA cleavage by C(60) under physiological conditions are reduced species such as O(2)(-)* and *OH.
Abstract: To characterize fullerenes (C60 and C70) as photosensitizers in biological systems, the generation of active oxygen species, through energy transfer (singlet oxygen 1O2) and electron transfer (reduced active oxygen radicals such as superoxide anion radical O2-• and hydroxyl radical •OH), was studied by a combination of methods, including biochemical (DNA-cleavage assay in the presence of various scavengers of active oxygen species), physicochemical (EPR radical trapping and near-infrared spectrometry), and chemical methods (nitro blue tetrazolium (NBT) method). Whereas 1O2 was generated effectively by photoexcited C60 in nonpolar solvents such as benzene and benzonitrile, we found that O2-• and •OH were produced instead of 1O2 in polar solvents such as water, especially in the presence of a physiological concentration of reductants including NADH. The above results, together with those of a DNA cleavage assay in the presence of various scavengers of specific active oxygen species, indicate that the active...
633 citations
TL;DR: Ionic liquids can serve as solvents for lanthanide-mediated organic reactions, and there are several examples of high reactivity and selectivity.
Abstract: Ionic liquids are solvents that consist entirely of ions. These nonvolatile and nonflammable solvents offer interesting opportunities for lanthanide and actinide chemistry. They can replace the organic phase in solvent extraction systems and can be used as nonaqueous electrolytes for electrodeposition of metals. Ionic liquids could find applications in the nuclear fuel cycle. Lanthanide coordination compounds or lanthanide-containing nanoparticles can be obtained via ionothermal or microwave-assisted synthesis in ionic liquids. Lanthanide-doped ionogels are a new type of luminescent hybrid materials. Ionic liquids can serve as solvents for lanthanide-mediated organic reactions, and there are several examples of high reactivity and selectivity.
622 citations