1. Model heterogeneous catalysis is studied under ultra-high vacuum (UHV) conditions on top of alloy bimetallic nano-clusters (e.g. Au-Cu and Cu-Pd) grown via buffer layer assisted growth method in UHV. In situ Auger and thermal desorption methods are used to follow reactivity and selectivity. High pressure-low pressure apparatus is uniquely used to study the thermal and photo-excited catalysis.
2. Local (transient) electric field effect on photo-induced and electron-induced reactivity of caged molecules on surfaces is studied near sharp edges and by growing model
in-vacuum nano-capacitors by trapping electrons in ice.
3. The role of plasmonic giant field enhancement near metallic (Ag) nano-particles on photo-reactivity vs. the effect of hot excited electrons on surface photochemistry has
been investigated. Its potential enhancement in photo-catalysis when embedded within TiO2 films has been investigated.
1. Photoinduced desorption of Xe from porous silicon: Evidence for selective and highly effective optical activity, Toker, G., Asscher, M., Phys. Rev. Lett., 107, 167402-16406 (2011).
2. Reduced Oxide Sites and Surface Corrugation Affecting the Reactivity, Thermal stability, and Selectivity of Supported Au–Pd Bimetallic Clusters on SiO2/Si(100) ; Gross, E., Sorek, E., Murugadoss, A., Asscher, M., Langmuir , 29 (20), 6025–6031 (2013).
3. Electron-induced chemistry of methyl chloride caged within amorphous solid water Horowitz, Y. and Asscher, M., J. Chem. Phys., 139, 154707 (2013).
4. Structure and Composition of Au-Cu and Pd-Cu Bimetallic Catalysts ffecting Acetylene Reactivity, Murugadoss, A., Sorek, E., and Asscher, M., Topics in Catalysis, 57 (10), 1007-1014 (2014).
5. Enhanced Photo Chemistry of Ethyl Chloride on Ag Nanoparticles,Toker, G., Bespaly A., Zilberberg, L., Asscher, M. Nano Letters, 15(2), 936-42 (2015);
6. Buffer Layer Assisted Growth of Ag Nanoparticles in Titania Thin Films Zilberberg, L., Mitlin, S., Shankar, H., Asscher, M., J. Phys. Chem. C, 119(52), 28979-28991 (20155).
• Ph.D., 1978, Hebrew University of Jerusalem
• B.Sc., 1973, Hebrew University of Jerusalem
1. We study the formation and chemistry of free carbyne and carbene radicals in aqueous solution. These species are produced by degradation of metal complexes that contain triple or double metal-carbon bonds in water. An alternative route to obtain these extremely reactive species is by reacting tri- or di-halo alkanes with chromium(II) ions according to:
R-CX3 + 3Cr+2 = R-C + 3[XCr]2+ or R-CHX2 + 2Cr+2 = RHC + 2[XCr]2+
Both carbynes and carbenes undergo coupling reactions and produce alkynes and alkenes respectively. In addition, they react with solvent molecules and produce a large variety of products.
2. We study the mechanism by which organo-metallic cluster complexes that contain alkylidyne ligands are formed. We believe that the origin of the alkylidyne group is a free carbyne that reacts with the tri-nuclear framework. We apply ion-exchange chromatography , GC-MS and X-ray crystallography techniques to elucidate the exact mechanism.
3. Ferric citrate complexes play an important role in the biological mobilization of iron in living cells. Ferric citrate preparations are used in medicine as iron supplements and for imaging purposes. Our goal has been the structural characterization of several ferric citrate complexes and the understanding of the role of each species in biological systems.
1. Bino, A.; Ardon, M.; Shirman, E. Formation of a Carbon-Carbon Triple Bond by Coupling Reactions in Aqueous Solution Science 2005,308, 234-235.
2. Kefalas, E. T.; Dakanali, M.; Panagiotidis, P.; Raptopoulou, C. P.; Terzis, A.; Mavromoustakos, T.; Kyrikou, I.; Karligiano, N.; Bino, A.; Salifoglou, A. pH- Specific Aqueous Synthetic Chemistry in the Binary Cadmium(II)-Citrate System. Gaining Insight into Cadmium(II)-Citrate Speciation with Relevance to Cadmium Toxicity Inorg. Chem. 2005, 44, 4818-4828.
3. van Slageren, J.; Rosa, P.; Caneschi, A.; Sessoli, R.; Casellas, H.; Rakitin, Y.V.; Cianchi, L.; Giallo, F.D.; Spina, G.; Bino, A.; Barra, A.L.; Guidi, T.; Carretta, S.; Caciuffo, R. Static and dynamic magnetic properties of an [Fe-13] cluster Phys. Rev. B, 2006 , 73, 014422.
4. Bogoslavsky, B.; Levy, O.; Kotlyar, A.; Salem, M.; Gelman, F.; Bino, A. Do carbyne radicals really exist in Aqueous solution? Angew. Chem. Int. Ed. 2012, 51,90-94.
5. Levy, O; Bogoslavsky, B.; Bino, A. Anhydrous Chromous Acetate Revisited – a Very Simple Synthetic Route Inorg. Chim. Acta, 2012, 391,179-181.
6. Levy, O; Bino, A. Metal Ions Do Not Play a Direct Role in the Formation of Carbon- Carbon Triple Bonds During Reduction of Trihaloalkyls by Cr(II) or V(II) Chem. Eur. J. 2012, 18, 15944- 15947.
7. Danovich, D.; Bino, A. ; Shaik, S. The formation of carbon-carbon triply bonded molecules from two free carbyne radicals via a conical intersection J. Phys. Chem. Lett., 2013, 4, 58-64.
8. Levy, O; Musa, S.; Bino, A. Formation of an Alkyne During Degradation of Metal-Alkylidyne Complexes Dalton Trans., 2013, 42, 12248 – 12251.
9. Halevi, O.; Bogoslavsky, B.; Grinstein, D.; Tibika-Apfelbaum, F.; Bino, A. Synthesis and Characterization of Nitrogen Rich Ruthenium Complexes Inorg. Chim. Acta, 2014, 421 , 228–232.
10. Avisar Levy, M.; Levy, O.; Ascarelli, O.; Popov, I.; Bino, A. Fractal Structures of Highly-Porous Metals and Alloys at the Nanoscale J. Alloys Compd. 2015, 635, 48-54.