Faculty - Rajca

Dr. Andrzej Rajca e-mail: Dr. Andrzej Rajca Rajca's Web Page Dr. Rajca's Research Group Site NCMN Homepage

Dr. Andrzej Rajca, Charles Bessey Professor
Chemistry
University of Nebraska - Lincoln
818D Hamilton Hall
Lincoln, Nebraska 68588-0304
phone: 402.472.9196
email: arajca1@unl.edu
Rajca's website
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Current Research

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).

Recent Publications

112. 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

111. 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]

110. 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

109. 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

108. 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

107. 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]

106. 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

105. 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 

104. Przemyslaw J. Boratynski, Maren Pink, Suchada Rajca, Andrzej Rajca, “Isolation of the Triplet Ground State Aminyl Diradical”, Angew. Chem. Int. Ed., 2010, 49, 5459–5462. DOI:10.1002/anie.201002811

103. Makoto Miyasaka, Maren Pink, Suchada Rajca, Andrzej Rajca, “Spiro Oligothiophenes”, Org. Lett., 2010, 12, 3230–3233. DOI:10.1021/ol1011696. Highlighted in Synfacts: Timothy M. Swager, Joel Batson, Synfacts, 2010, 1136-1136. DOI: 10.1055/s-0030-1258632

102. Andrzej Rajca, Velavan Kathirvelu, Sandip K. Roy, Maren Pink, Suchada Rajca, Santanu Sarkar, Sandra S. Eaton, Gareth R. Eaton, “A Spirocyclohexyl Nitroxide Amino Acid Spin Label for Pulsed EPR Spectroscopy Distance Measurements”, Chem. Eur. J., 2010, 16, 5778–5782. DOI:10.1002/chem.200903102

101. Jerzy K. Zak, Makoto Miyasaka, Suchada Rajca, Mieczyslaw Lapkowski, Andrzej Rajca, “Radical Cation of Helical, Cross-Conjugated β-Oligothiophene”, J. Am. Chem. Soc., 2010, 132, 3246–3247. DOI: 10.1021/ja910076n

A. Rajca, S. Rajca, “Asymmetric Synthesis of Chiral Tetraphenylenes” Angew. Chem. Int. Ed. 2010, 49, 672 – 674.

A. Rajca, V. Kathirvelu, S. K. Roy, M. Pink, S. Rajca, S. Sarkar, S. S. Eaton, G. R. Eaton, “A Spirocyclohexyl Nitroxide Amino Acid Spin Label for EPR Distance Measurements” Chem. Eur. J. 2010, 16, 5778 – 5782.

J. K. Zak, M. Miyasaka, S. Rajca, M. Lapkowski, A. Rajca, “Radical Cation of Helical, Cross-Conjugated ?–Oligothiophene” J. Am. Chem. Soc. 2010, 132, 3246 – 3247.

P. J. Boraty?ski, M. Pink, S. Rajca, A. Rajca, “Isolation of S = 1 Ground State Aminyl Diradical”, Angew. Chem. Int. Ed. 2010, 49, 5459 – 5462.

M. Miyasaka, M. Pink, S. Rajca, A. Rajca, “Spiro Oligothiophenes“ Org. Lett. 2010, 12, 3230 – 3233.

A. Rajca, J. Wongsriratanakul, S. Rajca, “Magnetic Ordering in an Organic Polymer.” Science 2001, 294, 1503 – 1505.

A. Rajca, "Organic Di? and Polyradicals.  From Spin Coupling to Magnetism?"  Chem. Rev. 1994, 94, 871 – 893.

 

Recent Graduates

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