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101.
R. Sankaranarayanan D. Velmurugan S. Shanmuga Sundara Raj Hoong‐Kun Fun S. Narasinga Rao S. Kannadasan P. C. Srinivasan 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(5):569-571
In the title compound, 2‐[(methylphenylamino)methyl]‐1‐(phenylsulfonyl)indole, C22H20N2O2S, the indole system is not strictly planar and the dihedral angle between the fused rings is 2.7 (1)°. The angles around the S atom of the sulfonyl substituent deviate significantly from the ideal value for tetrahedral geometry. The pyramidalization at the indole N atom is very small. Of the two C—H?O interactions, one influences the orientation of indole with respect to the sulfonyl group and the other determines the orientation of the phenyl bound to sulfonyl. The phenyl ring of the sulfonyl substituent makes a dihedral angle of 89.6 (1)° with the best plane of the indole. The molecular packing is stabilized by C—H?π and C—H?O hydrogen bonds. 相似文献
102.
R. Sankaranarayanan D. Velmurugan S. Shanmuga Sundara Raj Hoong‐Kun Fun 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(6):726-727
In the title compound, C29H30N6O, the naphthyridine moiety is planar with a dihedral angle between the fused rings of 1.9 (1)°. The phenol ring is nearly coplanar, while the diethylaminophenyl substituent is orthogonal to the central naphthyridine ring and the pyrrolidine ring makes an angle of 11.2 (1)° with it. The O atom of the hydroxy substituent is coplanar with the phenyl ring to which it is attached. The molecular structure is stabilized by a C—H?N‐type intramolecular hydrogen bond and the packing is stabilized by intermolecular C—H?π, O—H?N and N—H?O hydrogen bonds. 相似文献
103.
Suleyman I. Allakhverdiev Velmurugan Thavasi Vladimir D. Kreslavski Sergey K. Zharmukhamedov Vyacheslav V. Klimov Seeram Ramakrishna Dmitry A. Los Mamoru Mimuro Hiroshi Nishihara Robert Carpentier 《Journal of Photochemistry and Photobiology, C: Photochemistry Reviews》2010,11(2-3):101-113
Among various technologies for hydrogen production, the use of oxygenic natural photosynthesis has a great potential as can use clean and cheap sources—water and solar energy. In oxygenic photosynthetic microorganisms electrons and protons produced from water and redirected by the photosynthetic electron-transport chain via ferredoxin to the hydrogen-producing enzymes hydrogenase or nitrogenase. By these enzymes, e? and H+ recombine and form molecular hydrogen. Hydrogenase activity can be very high but is extremely sensitive to the photosynthetically evolved O2 that leads to reduced and unstable H2 production. However, presently, several approaches are developed to improve the energetic efficiency to generate H2. This review examines the main available pathways to improve the photosynthetic H2 production. 相似文献
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108.
Jaya Mohandas V. Srinivasa Rao N. Vijayakumar T. Kumar S. Velmurugan S. V. Narasimhan 《Journal of Radioanalytical and Nuclear Chemistry》2014,302(3):1185-1188
The removal of uranium and americium from nitric acid solutions by sulphonated phosphinic acid resin has been investigated. The capacity of the sulphonated resin exceeds the capacities of phosphinic acid resin and commercial cation exchange resin. Other advantages of the sulphonated resin for uranium and americium removal include reduced sensitivity to acidity and inert salt concentration. 相似文献
109.
Majid I. Tamboli Dr. Shobhana Krishnaswamy Dr. Rajesh G. Gonnade Dr. Mysore S. Shashidhar 《Chemistry (Weinheim an der Bergstrasse, Germany)》2013,19(38):12867-12874
Investigation of the intermolecular acyl‐transfer reactivity in molecular crystals of myo‐inositol orthoester derivatives and its correlation with crystal structures enabled us to identify the essential parameters to support efficient acyl‐transfer reactions in crystals: 1) the favorable geometry of the nucleophile (? OH) and the electrophile (C?O) and 2) the molecular assembly, reinforced by C? H???π interactions, which supports a domino‐type reaction in crystals. These parameters were used to identify another reactive crystal through a data‐mining study of the Cambridge Structural Database. A 2:1 co‐crystal of 2,3‐naphthalene diol and its di‐p‐methylbenzoate was selected as a potentially reactive crystal and its reactivity was tested by heating the co‐crystals in the presence of solid sodium carbonate. A facile intermolecular p‐toluoyl group transfer was observed as predicted. The successful identification of reactive crystals opens up a new method for the detection of molecular crystals capable of exhibiting acyl‐transfer reactivity. 相似文献