Andrzej Rajca, Charles Bessey Professor

Andrzej Rajca

Andrzej Rajca
Charles Bessey Professor

University of Nebraska–Lincoln
818D Hamilton Hall
Lincoln, Nebraska 68588-0304
Office: 402-472-9196

Research Interests

Rajca group’s research interest is in the area of organic and biomaterials chemistry. The underlying theme of our research is rational design and synthesis of new materials (molecules and polymers) with magnetic and optical properties. Rational design of new structures and materials (molecules and polymers) with targeted properties are implemented using the tools of organic synthesis, crystallography, magnetic resonance spectroscopy (NMR and EPR) and imaging (MRI), as well as magnetometry (SQUID), circular dichroism (CD) spectroscopy and multiangle light scattering (MALS).


  • Francesca Ciccullo, Nolan Gallagher, Olympia Geladari, Thomas Chasse, Andrzej Rajca, and Maria Benedetta Casu, “A Derivative of the Blatter Radical as a Potential Metal-Free Magnet for Stable Thin Films and Interfaces”, ACS Appl. Mater. Interfaces, 2016, 8, 1805–1812 DOI: 10.1021/acsami.5b09693
  • Arnon Olankitwanit, Suchada Rajca, Andrzej Rajca, “Aza-m-Xylylene Diradical with Increased Steric Protection of the Aminyl Radicals”, J. Org. Chem., 2015, 80, 5035–5044 DOI: 10.1021/acs.joc.5b00421
  • Virginia Meyer, Michael A. Swanson, Laura J Clouston, Przemysław J. Boratyński, Richard Stein, Hassane S. Mchaourab, Andrzej Rajca, Sandra S. Eaton, Gareth R. Eaton, “Room Temperature Distance Measurements of Immobilized Spin Labeled Protein by Double Electron–Electron Resonance Spectroscopy”, Biophys. J., 2015, 108, 1213–1219. DOI: 10.1016/j.bpj.2015.01.015
  • Nolan Gallagher, Arnon Olankitwanit, Andrzej Rajca, “High-Spin Organic Molecules”, J. Org. Chem., 2015, 80, 1291–1298 (JOCSynopsis). DOI: 10.1021/jo502505r
  • Molly. A. Sowers, Jessica. R. McCombs, Ying. Wang, Joseph T. Paletta, Stephen. W. Morton, Erik. C. Dreaden, Michael. D. Boska, M. Francesca. Ottaviani, Paula. T. Hammond, Andrzej. Rajca, Jeremiah. A. Johnson, “Redox-responsive branched-bottlebrush polymers for in vivo MRI and fluorescence imaging”, Nat. Commun., 5, Article number: 5460. DOI: 10.1038/ncomms6460 [MIT News | NIBIB Science Highlight]
  • Arnon Olankitwanit, Maren Pink, Suchada Rajca, Andrzej Rajca, “Synthesis of Aza-m-Xylylene Diradicals with Large Singlet-Triplet Energy Gap and Statistical Analyses of their EPR Spectra”, J. Am. Chem. Soc., 2014, 136, 14277–14288. DOI: 10.1021/ja508119d
  • Ying Wang, Joseph Paletta, Kathleen Berg, Erin Reinhart, Suchada Rajca, Andrzej Rajca, “Synthesis of Unnatural Amino Acids Functionalized with Sterically Shielded Pyrroline Nitroxides”, Org. Lett., 2014, 16, 5298–5300.DOI: 10.1021/ol502449r
  • Andrzej Rajca, Arnon Olankitwanit, Ying Wang, Przemyslaw J. Boratynski, Maren Pink, and Suchada Rajca, “High-Spin S = 2 Ground State Aminyl Tetraradicals”, J. Am. Chem. Soc., 2013, 135, 18205–18215. DOI: 10.1021/ja409472f. Highlighted in Synfacts: Timothy M. Swager, Joseph M. Azzarelli, Synfacts, 2014, 10, 0142. DOI:10.1055/s-0033-1340602 [Spotlights on Recent JACS Publications]
  • Joseph T. Paletta, Maren Pink, Bridget Foley, Suchada Rajca, Andrzej Rajca, “Synthesis and Reduction Kinetics of Sterically Shielded Pyrrolidine Nitroxides”, Org. Lett., 2012, 14, 5322–5325. DOI: 10.1021/ol302506f
  • Andrzej Rajca, Ying Wang, Michael Boska, Joseph T. Paletta, Arnon Olankitwanit, Michael A. Swanson, Deborah G. Mitchell, Sandra S. Eaton, Gareth R. Eaton, Suchada Rajca,“Organic Radical Contrast Agents for Magnetic Resonance Imaging”, J. Am. Chem. Soc., 2012, 134, 15724–15727. DOI: 10.1021/ja3079829, [JACS In C&EN]
  • Makoto Miyasaka, Maren Pink, Arnon Olankitwanit, Suchada Rajca, Andrzej Rajca, “Band Gap of Carbon-Sulfur [n]Helicenes”, Org. Lett., 2012, 14, 3076–3079. DOI: 10.1021/ol3011437. (Highlighted in Synfacts: Timothy M. Swager, Gregory D. Gutierrez, Synfacts, 2012, 8 0964. DOI: 10.1055/s-0032-1317089)
  • Andrzej Rajca, Przemyslaw J. Boratynski, Arnon Olankitwanit, Kouichi Shiraishi, Maren Pink, Suchada Rajca, “Ladder Oligo(m-aniline)s: Derivatives of Azaacenes with Cross-Conjugated π-Systems”, J. Org. Chem., 2012, 77, 2107–2120 (Featured Article). DOI: 10.1021/jo2025948.  (Highlighted in Synfacts: Timothy M. Swager, John B. Goods, Synfacts, 2012, 8 0502. DOI: 10.1055/s-0031-1290840)
  • Andrzej Rajca, Kouichi Shiraishi, Przemyslaw J. Boratynski, Maren Pink, Makoto Miyasaka, Suchada Rajca, “Oxidation of Annelated Diarylamines: Analysis of Reaction Pathways to Nitroxide Diradical and Spirocyclic Products”, J. Org. Chem., 2011, 76, 8447–8457. DOI: 10.1021/jo2017923
  • Arnon Olankitwanit, Velavan Kathirvelu, Suchada Rajca, Gareth R. Eaton, Sandra S. Eaton, Andrzej Rajca, “Calix[4]arene nitroxide tetraradical and octaradical”, Chem. Commun., 2011, 47, 6443–6445. DOI: 10.1039/C1CC11172H [From collection Supramolecular Chemistry]
  • Andrzej Rajca, Arnon Olankitwanit, Suchada Rajca, “Triplet Ground State Derivative of Aza-m-Xylylene Diradical with Large Singlet-Triplet Energy Gap”, J. Am. Chem. Soc., 2011, 133, 4750–4753. DOI: 10.1021/ja200708b
  • Ying Wang, Suchada Rajca, Andrzej Rajca, “Bis(benzenesulfonyl) Sulfide” (2011), Encyclopedia of Reagents for Organic Synthesis [Online], John Wiley & Sons Ltd. DOI: 10.1002/047084289X.rn01351


  • Kausik Das PhD 2007 Streck Laboratories, Omaha, Nebraska
  • Sumit Mukherjee PhD 2006 University of Wisconsin-Madison