@article { ISI:000250085300004, title = {One-step preparation of nanosized Ag-PdCo-powder and its alloy formation at low temperature}, journal = {Synthesis and Reactivity in Inorganic Metal-Organic and Nano-Metal Chemistry}, volume = {37}, number = {7}, year = {2007}, month = {SEP}, pages = {531-539}, publisher = {TAYLOR \& FRANCIS INC}, type = {Article}, address = {325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA}, abstract = {

Nano-sized silver-palladium co-powder has been synthesized from silver nitrate-palladium chloride by wet chemical method. The present experimental conditions are applied for the first time for Ag-Pd co-powders wherein sodium formaldehyde sulfoxylate (SFS) has been used as an external reducing agent to simultaneously reduce respective metal salts. SFS reduces the metal salts at room temperature thus prevents formation of bigger particles of the respective metals in co-powder. Powder X-ray diffraction measurements ( XRD) and Transmission electron microscopy ( TEM) suggest the formation of nano-sized Ag-Pd co-powder with particle diameter in the range of about 25 nm. SEM shows that the powder morphology changes with temperature. Heat treatment of 90: 10 (Ag:Pd) composition showed shift in XRD peaks indicating alloy formation of Ag/Pd at lower temperature. Thick-films generated by use of the co-powder resulted in Ag/Pd alloy at about 500 degrees C as confirmed by the XRD. Thermal analysis showed that Ag/Pd co-powders initially gain the weight due to oxidation followed by the weight loss.

}, keywords = {alloy, Chemical synthesis, nano-powder, noble metal, Transition Metal}, issn = {1553-3174}, doi = {10.1080/15533170701563707}, author = {Khanna, P. K. and Singh, N. and Kulkarni, D. and Marimuthu, R. and Charan, Shobhit and Patil, K. R. and Jain, G. H.} } @article { ISI:000291568100065, title = {Glycerol mediated low temperature synthesis of nickel nanoparticles by solution reduction method}, journal = {Journal of Nanoscience and Nanotechnology}, volume = {11}, number = {6}, year = {2011}, month = {JUN}, pages = {5131-5136}, publisher = {AMER SCIENTIFIC PUBLISHERS}, address = {25650 NORTH LEWIS WAY, STEVENSON RANCH, CA 91381-1439 USA}, abstract = {

Phase pure Nickel nano-particles were synthesized by in-situ generation of nickel hydrazine hydrate complex (Ni-HH) followed by its decomposition in an alkaline glycerol medium. The synthesis can be performed in an open beaker with or without the use of surface protective reagents. By using the present method, Ni nano-particles can be prepared in large scale. The black nano-powders so-obtained were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infra-red (FTIR) spectroscopy and thermal analysis (TGA). XRD and SAED analysis revealed that the synthesized particles were pure crystalline nickel with FCC structure.

}, keywords = {Chemical Reduction, Nano-Particles, synthesis, Transition Metal, XRD}, issn = {1533-4880}, doi = {10.1166/jnn.2011.4142}, author = {Singh, Kalpana and Kate, Kunal H. and Chilukuri, V. V. Satayanarayana and Khanna, P. K.} } @article {44238, title = {Transition-metal-catalyzed reactions involving arynes}, journal = {Synthesis-Stuttgart}, volume = {50}, year = {2018}, month = {JAN}, pages = {1-16}, type = {Article}, abstract = {

The plethora of transformations attainable by the transition-metal-catalyzed reactions of arynes has found immense contemporary interest in the scientific community. This review highlights the scope and importance of transition-metal-catalyzed aryne reactions in the field of synthetic organic chemistry reported to date. It covers transformations achieved by the combination of arynes and various transition metals, which provide a facile access to a biaryl motif, fused polycyclic aromatic compounds, different novel carbocycles, various heterocycles, and complex natural products. 1 Introduction 2 Insertion of Arynes 3 Annulation of Arynes 4 Cycloaddition of Arynes 5 Multicomponent Reactions of Arynes 6 Miscellaneous Reactions of Arynes 7 Total Synthesis of Natural Products Using Arynes 8 Conclusion

}, keywords = {annulation, arynes, Cycloaddition, Insertion, multicomponent, Natural products, Transition Metal}, issn = {0039-7881}, doi = {10.1055/s-0036-1589517}, author = {Dhokale, Ranjeet A. and Mhaske, Santosh B.} } @article {47398, title = {Advances in transition-metal-catalyzed C-H bond oxygenation of amides}, journal = {Synthesis-Stuttgart}, year = {2021}, month = {APR }, type = {Article; Early Access}, abstract = {

C-O bond formation represents a fundamental chemical transformation in organic synthesis to develop valuably oxygenated (hetero)arenes. Particularly, the direct and regioselective C-H bond oxygenation of privileged amides, using a transition metal catalyst and a mild oxygenating source, is a step-economy and attractive approach. During the last decade, considerable progress has been realized in the direct C-H oxygenation of primary, secondary, and tertiary amides. This Short Review compiles the advances in transition-metal-catalyzed oxygenation of C(sp(2))-H and C(sp(3))-H bonds on various amides with diverse oxygenation sources. The review is categorized into two different major sections: (i) C(sp(2))-H oxygenation and (ii) C(sp(3))-H oxygenation. Each section is discussed based on the directing group (monodentate and bidentate) attached to the amide derivatives.

}, keywords = {Amides, C-H activation, directing group, Oxygenation, Transition Metal}, issn = {0039-7881}, doi = {10.1055/a-1481-2584, Early Access Date = APR 2021}, author = {Vijaykumar, Muniyappa and Punji, Benudhar} }