Dr. Johannes Ammer

Johannes Ammer Dipl.-Ing., Dr. rer. nat.

Dissertation
	Generation of carbocations by laser flash photolysis: explorations, limitations, applications (12/2012) [download]
Awards
	Award of the Dr. Klaus Römer-Stiftung for PhD students (2011).
Publications

	Scales of Lewis Basicities toward C-centered Lewis Acids (Carbocations) H. Mayr, J. Ammer, M. Baidya, B. Maji, T. A. Nigst, A. R. Ofial, T. Singer, J. Am. Chem. Soc. 2015, 137, 2580-2599. [download]
	Structures and Reactivities of Iminium Ions Derived From Substituted Cinnamaldehydes and Various Chiral Imidazolidin-4-ones F. An, S. Paul, J. Ammer, A. R. Ofial, P. Mayer, S. Lakhdar, H. Mayr, Asian J. Org. Chem. 2014, 3, 550-555. [download]
	Photogeneration of Carbocations: Applications in Physical Organic Chemistry and the Design of Suitable Precursors J. Ammer, H. Mayr, J. Phys. Org. Chem. 2013, 26, 956-969. [download]
	Ion-Pairing of Phosphonium Salts in Solution: C-H···Halogen and C-H···π Hydrogen Bonds J. Ammer, C. Nolte, K. Karaghiosoff, S. Thallmair, P. Mayer, R. de Vivie-Riedle, H. Mayr, Chem. Eur. J. 2013, 19, 14612-14630. [download]
	Nucleophilic Reactivities and Lewis Basicities of 2-Imidazolines and Related N-Heterocyclic Compounds B. Maji, M. Baidya, J. Ammer, S. Kobayashi, P. Mayer, A. R. Ofial, H. Mayr, Eur. J. Org. Chem. 2013, 3369-3377. [download]
	A Comprehensive Microscopic Picture of the Benzhydryl Radical and Cation Photogeneration and Interconversion through Electron Transfer C. F. Sailer, B. P. Fingerhut, S. Thallmair, C. Nolte, J. Ammer, H. Mayr, R. de Vivie-Riedle, I. Pugliesi, E. Riedle ChemPhysChem 2013, 14, 1423-1437. [download]
	Solvent Nucleophilicities of Hexafluoroisopropanol/Water Mixtures J. Ammer, H. Mayr, J. Phys. Org. Chem. 2013, 26, 59-63. [download]
	Free Energy Relationships for Reactions of Substituted Benzhydrylium Ions: From Enthalpy- over Entropy- to Diffusion-Control J. Ammer, C. Nolte, H. Mayr, J. Am. Chem. Soc. 2012, 134, 13902-13911. [download]

	Photogeneration of Benzhydryl Cations by Near-UV Laser Flash Photolysis of Pyridinium Salts T. A. Nigst, J. Ammer, H. Mayr, J. Phys. Chem. A 2012, 116, 8494-8499. [download]

	Photolytic Generation of Benzhydryl Cations and Radicals from Quaternary Phosphonium Salts: How Highly Reactive Carbocations Survive Their First Nanoseconds J. Ammer, C. F. Sailer, E. Riedle, H. Mayr, J. Am. Chem. Soc. 2012, 134, 11481-11494. [download]
	Buildup and Decay of the Optical Absorption in the Ultrafast Photo-Generation and Reaction of Benzhydryl Cations in Solution B. P. Fingerhut, C. F. Sailer, J. Ammer, E. Riedle, R. de Vivie-Riedle, J. Phys. Chem. A 2012, 116, 11064-11074. [download]
	Nucleofugality and Nucleophilicity of Fluoride in Protic Solvents C. Nolte, J. Ammer, H. Mayr, J. Org. Chem. 2012, 77, 3325-3335. [download]
	Ambidente Reaktivität von Methylhydrazinen Ambident Reactivities of Methylhydrazines T. A. Nigst, J. Ammer, H. Mayr, Angew. Chem. 2012, 124, 1381-1385; Angew. Chem. Int. Ed. 2012, 51, 1353-1356. [deutsch-download][english-download]
	Laserblitzphotolytische Erzeugung α,β-ungesättigter Iminium-Ionen Generation of α,β-Unsaturated Iminium Ions by Laser Flash Photolysis S. Lakhdar, J. Ammer, H. Mayr, Angew. Chem. 2011, 123, 10127-10130; Angew. Chem. Int. Ed. 2011, 50, 9953-9956. [deutsch-download][english-download]
	Encapsulation of Diphenylmethyl Phosphonium Salts in Reverse Micelles: Enhanced Bimolecular Reaction of the Photofragments C. F. Sailer, R. B. Singh, J. Ammer, E. Riedle, I. Pugliesi, Chem. Phys. Lett. 2011, 512, 60-65. [download]
	The First Picoseconds in the Life of Benzhydryl Cations: Ultrafast Generation and Chemical Reactions C. F. Sailer, B. P. Fingerhut, J. Ammer, C. Nolte, I. Pugliesi, H. Mayr, R. de Vivie-Riedle, E. Riedle In Ultrafast Phenomena XVII (M. Chergui, D. Jonas, E. Riedle, R. W. Schoenlein, A. Taylor, Eds.), Oxford University Press, New York, 2011, pp 427-429.
	Nucleophilic Reactivities of Tertiary Alkylamines J. Ammer, M. Baidya, S. Kobayashi, H. Mayr, J. Phys. Org. Chem. 2010, 23, 1029-1035. [download]
	Electrophilic Reactivity of the α,α-Dimethylbenzyl (Cumyl) Cation J. Ammer, H. Mayr, Macromolecules 2010, 43, 1719-1723. [download]
	Magnetic and Transport Properties of La_0.67Pb_0.33(Mn_1-xCo_x)O_3-d M. Mihalik, V. Kavecanský, S. Matas, M. Zentková, J. Ammer, K. Kellner, G. Gritzner, Acta Phys. Pol., A 2008, 113, 251-254. [download]
	Preparation, Structure and Properties of La_0.67Pb_0.33(Mn_1-xCo_x)O_3-d G. Gritzner, J. Ammer, K. Kellner, V. Kavecanský, M. Mihalik, S. Matas, M. Zentková, Appl. Phys. A 2008, 90, 359-365. [download]
Conference Presentations

	Design of Suitable Precursors for the Photogeneration of Carbocations (Short Presentation) J. Ammer, H. Mayr, XIV European Symposium on Organic Reactivity, Prague (Czech Republic), September 1-6, 2013.
	Photolytic Generation of Benzhydryl Cations and Radicals from Quaternary Phosphonium Salts: How Highly Reactive Carbocations Survive Their First Nanoseconds (Poster) J. Ammer, C. F. Sailer, C. Nolte, E. Riedle, H. Mayr, 4th SFB 749 Workshop, Wildbad Kreuth (Germany), March 21-23, 2012.
	Laserblitzphotolytische Erzeugung von Carbokationen und Radikalen aus quaternären Phosphoniumsalzen (Lecture) J. Ammer, C. F. Sailer, C. Nolte, E. Riedle, H. Mayr, Sitzung des ProcessNet-Arbeitsausschusses "Kinetik und Reaktionsmechanismen" der DECHEMA, Frankfurt (Germany), January 9, 2012.
	Electrophilicities of Acceptor-Substituted Benzhydryl Cations (Poster) J. Ammer, C. Nolte, T. Singer, H. Mayr, ORCHEM 2010, Weimar (Germany), September 13-15, 2010.
	Electrophilicities of Acceptor-Substituted Benzhydryl Cations (Poster) J. Ammer, C. Nolte, S. Kobayashi, H. Mayr, International Conference of the SFB 749 at Kloster Irsee, Irsee (Germany), March 21-24, 2010.
	Electrophilicities of Acceptor-Substituted Benzhydryl Cations (Poster) J. Ammer, C. Nolte, S. Kobayashi, H. Mayr, The 12th Kyushu International Symposium on Physical Organic Chemistry, Fukuoka (Japan), December 15-18, 2009.