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Search Results: 1 - 10 of 1456 matches for " Vivek Kant Jogi "
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High Performance Polymer Light-Emitting Devices  [PDF]
Vivek Kant Jogi
World Journal of Nano Science and Engineering (WJNSE) , 2014, DOI: 10.4236/wjnse.2014.41003
Abstract:
In order to improve the performance of polymer light-emitting devices, driving voltages, current efficiency, luminance and power efficiency of different cathode metals such as Ca/Al, CsF/Al, LiF/Al and LiF/Ca/Ag were compared. The results show that cathode metals CsF/Al contain the highest current efficiency, maximum luminance and power efficiency. Therefore, we can choose the CsF/Al to be the cathode for improving the performance of polymer light-emitting devices.
2-(2-Chlorophenyl)acetic acid
Rajni Kant,Vivek K. Gupta,Kamini Kapoor,B. Narayana
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812023938
Abstract: In the title compound, C8H7ClO2, the carboxyl group forms a dihedral angle of 74.83 (9)° with the benzene ring plane. In the crystal, molecules are linked into inversion dimers by pairs of O—H...O hydrogen bonds. The dimers are linked into layers parallel to the bc plane by weak C—H...O interactions.
1,2,3,4,5,6-Hexa-O-acetyl-scyllo-inositol
Rajni Kant,Vivek K. Gupta,Kamini Kapoor,Renu Chib
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812033600
Abstract: The title molecule, C18H24O12, has crystallographic 2/m symmetry with two acetate group located on a mirror plane. The H—Csp3—O—Csp2 torsion angles characterizing orientation of the acetyl groups with respect to the cyclohexane ring are 0.0, 23.9 and 23.9°. The cyclohexane ring is in a chair conformation with all substituents in equatorial positions. In the crystal, molecules are connected through C—H...O hydrogen bonds into a chain extending along the c axis.
1-(4-Chlorophenyl)-1H-1,2,3,4-tetrazole
Jong Tae Kim,D. Gayathri,Vivek K. Gupta,Rajni Kant
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812014353
Abstract: There are two independent molecules in the asymmetric unit of the title compound, C7H5ClN4, in which the tetrazole and benzene rings are twisted by dihedral angles of 12.9 (1) and 39.8 (1)°. In the crystal, the independent molecules are connected into a tetramer by C—H...N hydrogen bonds, generating an R44(12) graph-set motif.
(E)-Ethyl 2-cyano-3-(furan-2-yl)acrylate
Rajesh G. Kalkhambkar,D. Gayathri,Vivek K. Gupta,Rajni Kant
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812016510
Abstract: There are two independent molecules in the asymmetric unit of the title compound, C10H9NO3, in both of which, all non-H atoms except for the methyl C atom lie nearly in the same plane [maximum deviations = 0.094 (3) and 0.043 (2) ]. In the crystal, each independent molecules is linked by pairs of C—H...O interactions, generating inversion dimers with R22(10) ring motifs.
N-[2-({[1-(4-Chlorophenyl)-1H-pyrazol-3-yl]oxy}methyl)phenyl]-N-methoxyhydrazinecarboxamide
Rajni Kant,Vivek K. Gupta,Kamini Kapoor,Chetan S. Shripanavar
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812038214
Abstract: In the title compound, C18H18ClN5O3, the hydrazinecarboxamide N—N—C(O)—N unit is nearly planar [maximum deviation = 0.074 (2) ] and is inclined at a dihedral angle of 57.43 (7)° with respect to the plane of the attached benzene ring. The chlorophenyl group makes dihedral angles of 19.71 (7) and 34.07 (6)° with the pyrazole and benzene rings, respectively. In the crystal, pairs of N—H...O hydrogen bonds link the molecules into inversion dimers that are further linked into chains along the a-axis direction by N—H...N hydrogen bonds. In addition, π–π stacking interactions are observed between benzene rings [centroid–centroid distance = 3.680 (1) ].
1-[(6-Chloropyridin-3-yl)methyl]imidazolidin-2-one
Rajni Kant,Vivek K. Gupta,Kamini Kapoor,Chetan S. Shripanavar
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812023537
Abstract: In the title molecule, C9H10ClN3O, the dihedral angle between the pyridine ring and imidazoline ring mean plane [maximum deviation = 0.031–(3) ] is 76.2 (1)°. In the crystal, N—H...O hydrogen bonds link pairs of molecules to form inversion dimers. In addition, weak C—H...N hydrogen bonds and π–π stacking interactions between pyridine rings [centroid–centroid distance = 3.977 (2) ] are observed.
N-(2-{[5-Bromo-2-(morpholin-4-yl)pyrimidin-4-yl]sulfanyl}-4-methoxyphenyl)-4-methylbenzenesulfonamide
Rajni Kant,Vivek K. Gupta,Kamini Kapoor,Mohan Kumar
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812033375
Abstract: In the title compound, C22H23BrN4O4S2, the benzene rings bridged by the sulfonamide group are tilted relative to each other by 68.9 (1)° and the dihedral angle between the sulfur-bridged pyrimidine and benzene rings is 69.7 (1)°. The molecular conformation is stabilized by a weak intramolecular π–π stacking interaction between the pyrimidine and the 4-methylbenzene rings [centroid–centroid distance = 3.934 (2) ]. The morpholine ring adopts a chair conformation and is disordered over two positions with an occupancy ratio of 0.853 (6):0.147 (6). In the crystal, molecules are linked by N—H...O hydrogen bonds into chains extending along the a axis and further, through C—H...N and C—H...O interactions, into a three-dimensional supramolecular structure.
(2E)-1-(4,4′′-Difluoro-5′-methoxy-1,1′:3′,1′′-terphenyl-4′-yl)-3-[4-(methylsulfanyl)phenyl]prop-2-en-1-one
Rajni Kant,Vivek K. Gupta,Kamini Kapoor,S. Samshuddin
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812030139
Abstract: In the title compound, C29H22F2O2S, the central benzene ring makes dihedral angles of 45.83 (7), 38.90 (7) and 55.50 (7)° with the two fluoro-substituted benzene rings and the methylsulfanyl-substituted benzene ring, respectively. In the crystal, C—H...O contacts connect the molecules into layers lying perpendicular to the c axis. In addition, π–π stacking interactions between one of the fluorophenyl groups [centroid–centroid distances = 3.681 (1) and 3.818 (1) ] are observed.
2-(Methoxyimino)-2-{2-[(2-methylphenoxy)methyl]phenyl}acetohydrazide
Rajni Kant,Vivek K. Gupta,Kamini Kapoor,Chetan S. Shripanavar
Acta Crystallographica Section E , 2012, DOI: 10.1107/s160053681203070x
Abstract: In the title molecule, C17H19N3O3, the dihedral angle between the two benzene rings is 57.17 (5)°. In the crystal, N—H...O and N—H...N hydrogen bonds connect molecules to form chains along [001]. In addition, a weak C—H...π interaction is observed.
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