• Rajnikant

      Articles written in Bulletin of Materials Science

    • X-ray structure determination and analysis of hydrogen interactions in 3,3′-dimethoxybiphenyl

      Rajnikant Dinesh Dalbir Singh

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      The crystal structure of 3,3′-dimethoxybiphenyl has been determined by X-ray diffraction methods with an aim of describing the hydrogen interaction in biphenyl derivatives. The title compound crystallizes in monoclinic space group 𝑃21/𝑐 with unit cell dimensions, 𝑎 = 7.706(1), 𝑏 = 11.745(2), 𝑐 = 12.721(2) Å, 𝛽 = 92.31(1)°, 𝑍 = 4 and its structure has been refined up to the reliability index of 3.8%. The average torsion angle about the inter-ring C–C bond is 37.5°. The O1 and O1′ atoms of the methoxy group are deviated by 0.046(1) Å and 0.234(1) Å from the mean planes of respective rings. The crystal cohesion is pronounced due to three-inter-molecular C–H…O hydrogen bonds.

    • X-ray analysis of 2-aniline benzo(2,3-𝑏) cyclopentane-1,3-dione

      Rajnikant Dinesh Mousmi M B Deshmukh Anshu Sawhney

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      The molecular and crystal structure of 2-aniline benzo(2,3-𝑏) cyclopentane-1,3-dione has been determined by X-ray crystallographic techniques. This compound crystallizes in the orthorhombic space group 𝑃212121 with unit cell parameters: 𝑎 = 5.467(1), 𝑏 = 10.657(3), 𝑐 = 19.602(6) Å; 𝑉 = 1142.01(5) Å3, 𝑍 = 4. The crystal structure has been resolved up to an 𝑅-factor 0.050 for 1129 reflections. All the three rings in the structure are planar. However, the dihedral angle between the phenyl ring and the moiety comprising of a five-membered and six-membered ring is 92.4°. The oxygen atom O1 acts as a trifurcated acceptor and is involved in the formation of three intermolecular interactions.

    • Weak C–H…O hydrogen bonds in alkaloids: An overview

      Rajnikant Dinesh Kamni

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      An overview of general classification scheme, medicinal importance and crystal structure analysis with emphasis on the role of hydrogen bonding in some alkaloids is presented in this paper. The article is based on a general kind of survey while crystallographic analysis and role of hydrogen bonding are limited to only those alkaloids whose three-dimensional structure has been reported by us. The C–H…O hydrogen bonding in the solid state in alkaloids has been found to be predominant and this observation makes the role of hydrogen bonding in organic molecular assemblies very important.

    • Synthesis, X-ray structure and N–H…O interactions in 1,3-diphenyl-urea

      Rajnikant Dinesh M B Deshmukh Kamni

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      The synthesis, X-ray structure and role of intermolecular interactions have been studied in case of 1,3-diphenyl-urea, owing to its medicinal importance. The compound crystallizes in orthorhombic crystal system (space group, 𝑃𝑛𝑎21) with unit cell parameters, 𝑎 = 9.118(3), 𝑏 = 10.558(2), 𝑐 = 11.780(3) Å and 𝑍 = 4. The structure has been solved by direct methods and refined to a final 𝑅-value of 0.0316. The oxygen atom of the carbonyl group is responsible for the existence of two N–H…O intermolecular interactions.

    • Synthesis of copper telluride nanowires using template-based electrodeposition method as chemical sensor

      Sandeep Arya Saleem Khan Suresh Kumar Rajnikant Verma Parveen Lehana

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      Copper telluride (CuTe) nanowires were synthesized electrochemically from aqueous acidic solution of copper (II) sulphate (CuSO4.5H2O) and tellurium oxide (TeO2) on a copper substrate by template-assisted electrodeposition method. The electrodeposition was conducted at 30 °C and the length of nanowires was controlled by adjusting deposition time. Structural characteristics were examined using X-ray diffraction and scanning electron microscope which confirm the formation of CuTe nanowires. Investigation for chemical sensing was carried out using air and chloroform, acetone, ethanol, glycerol, distilled water as liquids having dielectric constants 1, 4.81, 8.93, 21, 24.55, 42.5 and 80.1, respectively. The results unequivocally prove that copper telluride nanowires can be fabricated as chemical sensors with enhanced sensitivity and reliability.

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