Dr. habil. Konstantin Amsharov

Dr. habil. Konstantin Amsharov

 

Nachwuchsgruppenleiter

 

Tel: +49 (0) 9131 85 22 544
Fax: +49 (0) 9131 85 26 864
E-Mail:

 

Kurzbiographie

Dr. Konstantin Yu. Amsharov studied chemistry at Sankt-Petersburg State University in Sankt-Petersburg. In 2002 he received his Ph.D from the Institute of Macromolecular Compounds, Russian Academy of Science. From 2002 to 2004 he was a postdoctoral fellow in the group of Prof. Shamanin (Institute of Macromolecular Compounds, Russian Academy of Science). In 2005, he moved to Max-Planck Institute for Solid State Research, Stuttgart where he worked with Prof. Martin Jansen on several projects in the area of fullerene chemistry and synthesis of higher and non-IPR fullerenes. From 2009 to 2012 he received his habilitation in Organic chemistry in the subject “Direct synthesis of carbon based nanostructures: buckybowls, higher fullerenes and nanotubes” at the Institute of Organic Chemistry, University of Stuttgart, Germany. From 2005 to 2013 he was a Group Leader of the “Fullerene group” in the department of Prof  Martin Jansen (Max-Planck Institute for Solid State Research, Stuttgart). Since 2014 he is leading a junior research group (Heisenberg program) at FAU Erlangen-Nürnberg.

Mitarbeiter

Group Picture 2017

Dr. Ekaterina Roshchina
Olena Papaianina, MSc
Jorg Tomada, Msc
Arber Uka, Msc
Stanislav Shkolnikov, BSc
Ann-Kristin Steiner, BSc

 

 

Motivated undergraduate students with an interest in our research topics are encouraged to join our group.

Forschungsbereich

Research area: Zipping Approach

Our research group has its main focus on the rational synthesis of sp2-carbon based nanostructures which includes the rational synthesis of higher and non-classical fullerenes, geodesic polycyclic hydrocarbons, buckybowls, graphene nanoribbons, nanographenes carbon nanotubes and other related system. Our synthetic strategy is based on the synthesis of the precursor molecules - polycyclic aromatic hydrocarbons, containing the carbon framework required for the formation of the target nanostructure. The respective precursor molecule can be “rolled up” to the desired carbon nanostructure by intramolecular Aryl-Aryl domino-coupling. For this purpose specially designed precursor molecules are synthesized and investigated for controlled synthesis of the respective carbon nanostructures. The characteristic feature of the approach is a zipper mechanism of cyclization (regiospecific condensation in a domino fashion) by which the regiospecifity of each condensation step is unambiguously predefined by the specially “designed” precursor structure. Our main goal is to find and to develop alternative synthetic approaches suitable for preparative production of various carbon allotrope in isomerically pure form.

ausgewählte Publikationen

Publikationen

O. Papaianina, Y. K. Amsharov Aluminum oxide mediated C-F bond activation in trifluoromethylated arenesChem. Commun. 2016, 52, 1505-1508

Thermally activated γ-aluminium oxide was found to be very effective for C–F bond activation in trifluoromethylated arenes. Depending on the activation degree the respective arenes can be converted either to cyclic ketones or to the respective carboxylic acids with good to excellent yields.The high selectivity of the reaction is a consequence of an effective encapsulation of the reagent in to the alumina nanopore environment. In general our finding demonstrates that the CF3 functionality can be reconsidered as synthetically useful functionality and an effective synthon for carboxyl groups.

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J. R. Sanchez-Valencia, T. Dienel, O. Gröning, I. Shorubalko, A. Mueller, M. Jansen, K. Amsharov, P. Ruffieux, R. Fasel Controlled synthesis of single-chirality carbon nanotubesNature 2014, 512, 61-64

We have shown that specially designed polycyclic aromatic hydrocarbons (PAHs) can be quantitatively converted to the “preprogrammed” ultra-short singly-capped nanotubes bearing several CNT segments. The tubes obtained by this route are already bonded to the metal and can be used directly for the SWCNT fabrication on the same metal surface. We have demonstrated that CNT seeds are active in tube growth initiation and can be grown to isomerically pure SWCNTs by epitaxial elongation under Chemical Vapor Deposition (CVD) condition. For the first time the uncontrolled CNT nucleation has been avoided and predefined isomerically pure and defect free SWCNTs were effectively fabricated.

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M. Kabdulov, M. Jansen, K. Y. Amsharov Bottom-Up C60 Fullerene Construction from a Fluorinated C60H21F9 Precursor by Laser-Induced Tandem CyclizationChemistry - A European Journal 2013, 19, 17262-17266

A specially fluorinated C60 fullerene precursor was converted to the target C60 cage by laser ionisation via highly selective HF elimination without any detectable side reactions and undesired fragmentations. The fully selective transformation to the target fullerene has been unambiguously demonstrated using a 13C-labeled precursor. In general the findings open new horizons for the synthesis of new carbon-based nanomaterials, which cannot be obtained by any conventional alternative method.

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A. Kromer, U. Wedig, E. Roduner, M. Jansen, K. Y. Amsharov Counterintuitive Anisotropy of Electron Transport Properties in KC60(THF)5⋅2 THF FullerideAngew. Chem. Int. Ed. 2013, 52, 12610-12614

We have synthesized and characterized single crystals of the fulleride based 1D electric conductor (KC60(THF)5·2THF) in which C60 anions are highly ordered in 2D corrugated layers. The combination of the counter alkali metal cation coordinated with solvent ligands prevents the dimerization of C60·- and the conductivity loss over a large temperature range. The spatial separation of particular fullerene anions kept their orbital correlation resulting in the 1D conductivity in the 2D layer with counterintuitive anisotropy. On the base of experimental ESR and SQUID data and X-ray analysis we have demonstrated that conduction electrons move freely only along the C60-channels with larger intercentroid separation whereas the channels with shorter C60-C60 contacts in the same layer are nonconductive.

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Y. K. Amsharov, M. A. Kabdulov, M. Jansen Facile Bucky-Bowl Synthesis by Regiospecific Cove-Region Closure by HF EliminationAngew. Chem. Int. Ed. 2012, 51, 4594-4597

Building bowls: An effective intramolecular aryl–aryl coupling is the key step in the rational synthesis of carbon based nanostructures. We have found that such a process can be embodied very efficiently through quantitative HF elimination on active Al2O3. The process is characterized by an unprecedentedly high chemoselectivity and regiospecificity allowing the facile synthesis of extended bowl shaped hydrocarbons in multi-gram scale.

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A. Mueller, K. Y. Amsharov Synthesis of Precursors for Large-Diameter Hemispherical Buckybowls and Precursors for Short Carbon NanotubesEuropean Journal of Organic Chemistry 2012, 2012, 6155-6164

Synthesis of polycyclic aromatic hydrocarbons possessing a carbon connectivity required for the generation of extended hemispherical buckybowls via intramolecular cyclodehydrogenation is a key prerequisity for the rational synthesis of isomerically pure single-walled carbon nanotubes (SWCNTs). We have developed several approaches to the precursors for the rational synthesis of isomerically pure armchair, zigzag and chiral single-walled carbon nanotubes (SWCNTs). The suggested synthesis strategy provides further options for the construction of precursors for virtually any possible SWCNT chiralities.

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K. Amsharov, N. Abdurakhmanova, S. Stepanow, S. Rauschenbach, M. Jansen, K. Kern Towards the Isomer-Specific Synthesis of Higher Fullerenes and Buckybowls by the Surface-Catalyzed Cyclodehydrogenation of Aromatic PrecursorsAngew. Chem. Int. Ed. 2010, 49, 9392-9396

A Pt surface-catalyzed cyclodehydrogenation reaction enabled selective formation of various carbon based nanostructures from specially “preprogrammed” polycyclic organic precursors. As no C-C bond rearrangement occurred during the reaction, only specifically designed precursors gave the desired carbon nanostructure (see picture).This efficient and selective condensation process opens new horizons in the directed synthesis of fullerenes and related structures. On the basis of these results, for the first time we successfully proceeded the rational synthesis of a higher fullerene C84(20) by folding of the respective C84H42 precursor.

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Publikationen

46)O. Papaianina, V. A. Akhmetov, A. A. Goryunkov, F. Hampel, F. W. Heinemann, K. Y. Amsharov, Synthesis of Rationally Halogenated Buckybowls via Chemoselective Aromatic C-F Bond ActivationAngew. Chem. Int. Ed. 2017, 56, 4834-4838
45)N. Suzuki, T. Fujita, K. Y. Amsharov, J. Ichikawa Aluminium-mediated Aromatic C–F Bond Activation: Regioswitchable Construction of Benzene-fused Triphenylene FrameworksChem. Comm. 2016, 52, 12948-12951
44)K. Y. Amsharov Cyclodehydrofluorination of Fluoroarenes on Metal Oxides. Towards Bottom-Up Synthesis of Carbon Nanostructures on Insulating SurfacesPhys. Status Solidi B 2016, 253, 2473-2477
43)S. N. Spisak, J. Li, A. Y. Rogachev, Z. Wei, O. Papaianina, K. Y. Amsharov, A. V. Rybalchenko, A. A. Goryunkov, M. A. Petrukhina, From Corannulene to Indacenopicene: Effect of Carbon Framework Topology on Aromaticity and Reduction LimitsOrganometallics 2016, 35, 3105-3111
42)J. F. Greisch, K. Y. Amsharov, J. Weippert, P. Weis, A. Böttcher, M. M. Kappes From Planar to Cage in 15 Easy Steps: Resolving the C60H21F9 → C60 Transformation by Ion Mobility Mass SpectrometryJ. Am. Chem. Soc. 2016, 138, 11254-11263
41)N. Abdurakhmanova, A. Mueller, S. Stepanow, S. Rauschenbach, M. Jansen, K. Kern, Y. K. Amsharov Bottom up fabrication of (9,0) zigzag and (6,6) armchair carbon nanotube end-caps on the Rh(111) surfaceCarbon 2015, 84, 444-447
40)K. Y. Amsharov Combinatorial approach for the synthesis of precursors for chirality-controlled synthesis of SWCNTsPhys. Status Solidi B 2015, n/a-n/a
39)U. Zschieschang, K. Amsharov, M. Jansen, K. Kern, H. Klauk, T. R. Weitz Separating the impact of oxygen and water on the long-term stability of n-channel perylene diimide thin-film transistorsOrg. Electr. 2015, 26, 340-344
38)A. Mueller, K. Y. Amsharov Synthesis of Robust Precursors for the Controlled Fabrication of (6,6), (8,8), (10,10), and (12,12) Armchair Single-Walled Carbon NanotubesEur. J. Org. Chem. 2015, 2015, 3053-3056
37)S. Ulas, J. Weippert, K. Amsharov, M. Jansen, M. L. Pop, M. V. Diudea, D. Strelnikov, A. Böttcher, M. M. Kappes Thermal Decomposition of the Fullerene Precursor C 60 H 21 F 9 Deposited on GraphiteJ. Phys. Chem. C 2015, 119, 7308-7318
36)N. Abdurakhmanova, N. Amsharov, S. Stepanow, M. Jansen, K. Kern, K. Amsharov Synthesis of wide atomically precise graphene nanoribbons from para-oligophenylene based molecular precursorCarbon 2014, 77, 1187-1190
35)K. Y. Amsharov, K. Ziegler, A. Mueller, M. Jansen Capturing the Antiaromatic #6094C68 Carbon Cage in the Radio-Frequency FurnaceChemistry - A European Journal 2012, 18, 9289-9293
34)A. Mueller, Y. K. Amsharov, M. Jansen End-Cap Precursor Molecules for the Controlled Growth of Single-Walled Carbon NanotubesFullerenes, Nanotubes and Carbon Nanostructures 2012, 20, 401-404
33)U. Wedig, K. Y. Amsharov, M. Jansen Intermolecular Halogen-Halogen Interactions, a Theoretical Point of ViewZ. anorg. allg. Chem. 2012, 638, 1625-1625
32)K. Amsharov, P. Merz Intramolecular Aryl-Aryl Coupling of Fluoroarenes through Al2O3 -Mediated HF EliminationJ. Org. Chem. 2012, 77, 5445-5448
31)K. Ziegler, K. Y. Amsharov, M. Jansen Synthesis, Separation and Structure Elucidation of a Missing C60 Chloride: C2v-C60Cl8Zeitschrift für Naturforschung B 2012, 67,
30)K. Ziegler, A. Mueller, K. Y. Amsharov, M. Jansen Capturing the Most-Stable C56 Fullerene Cage by In Situ ChlorinationChemistry - An Asian Journal 2011, 6, 2412-2418
29)K. Y. Amsharov, Y. Krämer, M. Jansen Direct Observation of the Transition from Static to Dynamic Jahn-Teller Effects in the [Cs(THF)4]C60 FullerideAngew. Chem. Int. Ed. 2011, 50, 11640-11643
28)K. Ziegler, K. Y. Amsharov, I. Halasz, M. Jansen Facile Separation and Crystal Structure Determination of C2-C82(3) FullereneZ. anorg. allg. Chem. 2011, 637, 1463-1466
27)A. Mueller, K. Ziegler, K. Y. Amsharov, M. Jansen Perchloropyracylene and its Fusion with C60 by Chlorine-Assisted Radio-Frequency Furnace SynthesisChemistry - A European Journal 2011, 17, 11797-11804
26)N. V. Kozhemyakina, K. Y. Amsharov, J. Nuss, M. Jansen Synthesis and Structure Analysis of (K[DB18 C6])4(C60)5⋅12 THF Containing C60 in Three Different Bonding StatesChemistry - A European Journal 2011, 17, 1798-1805
25)M. A. Kabdulov, K. Y. Amsharov, M. Jansen A step toward direct fullerene synthesis: C60 fullerene precursors with fluorine in key positionsTetrahedron 2010, 66, 8587-8593
24)K. Ziegler, A. Mueller, K. Y. Amsharov, M. Jansen Disclosure of the Elusive C2v-C72 Carbon CageJ. Am. Chem. Soc. 2010, 132, 17099-17101
23)U. Kraft, U. Zschieschang, F. Ante, D. Kälblein, C. Kamella, K. Amsharov, M. Jansen, K. Kern, E. Weber, H. Klauk Fluoroalkylphosphonic acid self-assembled monolayer gate dielectrics for threshold-voltage control in low-voltage organic thin-film transistorsJournal of Materials Chemistry 2010, 20, 6416
22)K. Y. Amsharov, M. A. Kabdulov, M. Jansen Homo-elimination of HF - An Efficient Approach for Intramolecular Aryl-Aryl CouplingChemistry - A European Journal 2010, 16, 5868-5871
21)A. Mueller, K. Ziegler, K. Y. Amsharov, M. Jansen In Situ Synthesis of Chlorinated Fullerenes by the High-Frequency Furnace MethodEur. J. Inorg. Chem. 2010, 2011, 268-272
20)Y. K. Amsharov, K. S. Simeonov, M. Jansen On Selectivity of Higher Fullerene ChlorinationFullerenes, Nanotubes and Carbon Nanostructures 2010, 18, 427-430
19)A. Mueller, K. Y. Amsharov, M. Jansen Synthesis of end-cap precursor molecules for (6,6) armchair and (9,0) zig-zag single-walled carbon nanotubesTetrahedron Letters 2010, 51, 3221-3225
18)K. S. Simeonov, K. Y. Amsharov, M. Jansen A Fast Route Toward the Preparative Isolation of Fullerene Isomers C78(1) and C78(2)Fullerenes, Nanotubes and Carbon Nanostructures 2009, 17, 341-348
17)K. S. Simeonov, K. Y. Amsharov, M. Jansen C80Cl12: A Chlorine Derivative of the Chiral D2-C80 Isomer-Empirical Rationale of Halogen-Atom Addition PatternChemistry - A European Journal 2009, 15, 1812-1815
16)K. Y. Amsharov, M. A. Kabdulov, M. Jansen Highly Efficient Fluorine-Promoted Intramolecular Condensation of Benzo[c]phenanthrene: A New Prospective on Direct Fullerene SynthesisEuropean Journal of Organic Chemistry 2009, 2009, 6328-6335
15)U. Zschieschang, K. Amsharov, T. R. Weitz, M. Jansen, H. Klauk Low-voltage organic n-channel thin-film transistors based on a core-cyanated perylene tetracarboxylic diimide derivativeSynthetic Metals 2009, 159, 2362-2364
14)L. Epple, Y. K. Amsharov, M. Jansen Structures of the Individual Higher Fullerene Isomers C76-D2 and C78(2)-C2v in Cocrystals with Ag- and Cu-TetraphenylporphyrinesFullerenes, Nanotubes and Carbon Nanostructures 2009, 17, 67-77
13)K. Amsharov, M. Jansen Synthesis of a higher fullerene precursor - an "unrolled" C84 fullereneChem. Commun. 2009, 2691
12)R. T. Weitz, K. Amsharov, U. Zschieschang, M. Burghard, M. Jansen, M. Kelsch, B. Rhamati, P. A. Aken van, K. Kern, H. Klauk The Importance of Grain Boundaries for the Time-Dependent Mobility Degradation in Organic Thin-Film TransistorsChem. Mater. 2009, 21, 4949-4954
11)K. Y. Amsharov, M. Jansen A C78 Fullerene Precursor: Toward the Direct Synthesis of Higher FullerenesJ. Org. Chem. 2008, 73, 2931-2934
10)K. S. Simeonov, K. Y. Amsharov, E. Krokos, M. Jansen An Epilogue on the C78-Fullerene Family: The Discovery and Characterization of an Elusive IsomerAngew. Chem. Int. Ed. 2008, 47, 6283-6285
9)K. S. Simeonov, K. Y. Amsharov, M. Jansen Chlorinated Derivatives of C78-Fullerene Isomers with Unusually Short Intermolecular Halogen-Halogen ContactsChemistry - A European Journal 2008, 14, 9585-9590
8)L. Epple, K. Amsharov, K. Simeonov, I. Dix, M. Jansen Crystallographic characterization and identification of a minor isomer of C84 fullereneChem. Commun. 2008, 5610
7)T. R. Weitz, K. Amsharov, U. Zschieschang, E. B. Villas, D. K. Goswami, M. Burghard, H. Dosch, M. Jansen, K. Kern, H. Klauk Organic n-Channel Transistors Based on Core-Cyanated Perylene Carboxylic Diimide DerivativesJ. Am. Chem. Soc. 2008, 130, 4637-4645
6)K. S. Simeonov, K. Y. Amsharov, M. Jansen Connectivity of the Chiral D2-Symmetric Isomer of C76 through a Crystal-Structure Determination of C76Cl18⋅TiCl4Angew. Chem. Int. Ed. 2007, 46, 8419-8421
5)K. Amsharov, K. Simeonov, M. Jansen Formation of fullerenes by pyrolysis of 1,2´-binaphthyl and 1,3-oligonaphthyleneCarbon 2007, 45, 337-343
4)K. Amsharov, M. Jansen Formation of fullerenes by pyrolysis of perchlorofulvalene and its derivativesCarbon 2007, 45, 117-123
3)Y. N. Sazanov, A. V. Novoselova, Y. K. Amsharov, V. L. Ugolkov, O. A. Andreeva, A. V. Gribanov Prospects for Using Polyacrylonitrile for Preparing Carbonized Polymeric CompositesRussian Journal of Applied Chemistry 2005, 78, 794-797
2)O. V. Ratnikova, Y. E. Melenevskaya, Y. K. Amsharov, E. N. Vlasova, B. Z. Volchek, A. V. Gribanov, L. A. Shibaev, V. N. Zgonnik The New Method for the Synthesis of Fullerols Based on Radical ReactionFullerenes, Nanotubes and Carbon Nanostructures 2005, 12, 155-158
1)V. N. Zgonnik, L. V. Vinogradova, Y. E. Melenevskaya, Y. K. Amsharov, O. V. Ratnikova, Y. F. Biryulin, A. V. Novoselova, P. N. Lavrenko Synthesis of fullerene-containing polymer composites and investigation of interactions in these systemsPhys. Solid State 2002, 44, 615-616