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Suchada Rajca

  • 4173 Citations
  • 43 h-Index
1989 …2019
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Research Output 1989 2019

  • 4173 Citations
  • 43 h-Index
  • 85 Article
  • 2 Comment/debate
  • 2 Letter
  • 1 Conference article
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Article
2019
1 Citation (Scopus)

gem-Diethyl Pyrroline Nitroxide Spin Labels: Synthesis, EPR Characterization, Rotamer Libraries and Biocompatibility

Bleicken, S., Assafa, T. E., Zhang, H., Elsner, C., Ritsch, I., Pink, M., Rajca, S., Jeschke, G., Rajca, A. & Bordignon, E., Jan 1 2019, In : ChemistryOpen.

Research output: Contribution to journal › Article

Open Access
Gems
Spin Labels
Biocompatibility
Labeling
Paramagnetic resonance

High-Spin Diradical Dication of Chiral π-Conjugated Double Helical Molecule

Shu, C., Zhang, H., Olankitwanit, A., Rajca, S. & Rajca, A., Jan 1 2019, In : Journal of the American Chemical Society. 141, 43, p. 17287-17294 8 p.

Research output: Contribution to journal › Article

Enantiomers
Discrete Fourier transforms
Cations
Positive ions
Dibutyl Phthalate
7 Citations (Scopus)

Thermally and Magnetically Robust Triplet Ground State Diradical

Gallagher, N., Zhang, H., Junghoefer, T., Giangrisostomi, E., Ovsyannikov, R., Pink, M., Rajca, S., Casu, M. B. & Rajca, A., Jan 1 2019, In : Journal of the American Chemical Society.

Research output: Contribution to journal › Article

Polystyrenes
Ultrahigh vacuum
Vacuum
Ground state
Glass
2018
3 Citations (Scopus)

Maximizing NMR signal per unit time by facilitating the e-e-n cross effect DNP rate

Leavesley, A., Jain, S., Kamniker, I., Zhang, H., Rajca, S., Rajca, A. & Han, S., Jan 1 2018, In : Physical Chemistry Chemical Physics. 20, 43, p. 27646-27657 12 p.

Research output: Contribution to journal › Article

Nuclear magnetic resonance
Polarization
electron spin
nuclear magnetic resonance
polarization
3 Citations (Scopus)

Reduction kinetics and electrochemistry of tetracarboxylate nitroxides

Huang, S., Zhang, H., Paletta, J. T., Rajca, S. & Rajca, A., Mar 4 2018, In : Free Radical Research. 52, 3, p. 327-334 8 p.

Research output: Contribution to journal › Article

Electrochemistry
Gems
Kinetics
Glutathione
Voltammetry
6 Citations (Scopus)

S = 1 Tetraazacyclophane Diradical Dication with Robust Stability: A Case of Low-Temperature One-Dimensional Antiferromagnetic Chain

Wang, W., Chen, C., Shu, C., Rajca, S., Wang, X. & Rajca, A., Jun 27 2018, In : Journal of the American Chemical Society. 140, 25, p. 7820-7826 7 p.

Research output: Contribution to journal › Article

Salts
Temperature
Magnetic anisotropy
X ray crystallography
X Ray Crystallography
11 Citations (Scopus)

Truncated Cross Effect Dynamic Nuclear Polarization: An Overhauser Effect Doppelgänger

Equbal, A., Li, Y., Leavesley, A., Huang, S., Rajca, S., Rajca, A. & Han, S., May 3 2018, In : Journal of Physical Chemistry Letters. 9, 9, p. 2175-2180 6 p.

Research output: Contribution to journal › Article

Overhauser effect
Polarization
polarization
Glycerol
Esters
2017
6 Citations (Scopus)

Intramolecular Hydrogen Atom Transfer in Aminyl Radical at Room Temperature with Large Kinetic Isotope Effect

Wang, Y., Olankitwanit, A., Rajca, S. & Rajca, A., May 31 2017, In : Journal of the American Chemical Society. 139, 21, p. 7144-7147 4 p.

Research output: Contribution to journal › Article

Isotopes
Hydrogen
Chemical activation
Atoms
Kinetics
2 Citations (Scopus)

PEGylated, Water-Soluble, Stable Aminyl Radical

Wang, Y., Rajca, S. & Rajca, A., Jul 21 2017, In : Journal of Organic Chemistry. 82, 14, p. 7512-7518 7 p.

Research output: Contribution to journal › Article

Hydrogen
Atoms
Water
Acetone
Isomers
11 Citations (Scopus)

Synthesis and Electron Spin Relaxation of Tetracarboxylate Pyrroline Nitroxides

Huang, S., Paletta, J. T., Elajaili, H., Huber, K., Pink, M., Rajca, S., Eaton, G. R., Eaton, S. S. & Rajca, A., Feb 3 2017, In : Journal of Organic Chemistry. 82, 3, p. 1538-1544 7 p.

Research output: Contribution to journal › Article

Esters
Electrons
Tricarboxylic Acids
Spin Labels
Trehalose
2016
43 Citations (Scopus)

High-Spin Organic Diradical with Robust Stability

Gallagher, N. M., Bauer, J. J., Pink, M., Rajca, S. & Rajca, A., Aug 3 2016, In : Journal of the American Chemical Society. 138, 30, p. 9377-9380 4 p.

Research output: Contribution to journal › Article

Vacuum
Ground state
Technology
Temperature
Decomposition
23 Citations (Scopus)

Radical Cation and Neutral Radical of Aza-Thia[7]helicene with SOMO-HOMO Energy Level Inversion

Wang, Y., Zhang, H., Pink, M., Olankitwanit, A., Rajca, S. & Rajca, A., Jun 15 2016, In : Journal of the American Chemical Society. 138, 23, p. 7298-7304 7 p.

Research output: Contribution to journal › Article

Molecular orbitals
Electron energy levels
Cations
Positive ions
Oxidation
15 Citations (Scopus)

Thiophene-Based Double Helices: Syntheses, X-ray Structures, and Chiroptical Properties

Zhang, S., Liu, X., Li, C., Li, L., Song, J., Shi, J., Morton, M., Rajca, S., Rajca, A. & Wang, H., Aug 10 2016, In : Journal of the American Chemical Society. 138, 31, p. 10002-10010 9 p.

Research output: Contribution to journal › Article

Optical Rotation
Thiophenes
Anisotropy
Ladders
Thiophene
2015
7 Citations (Scopus)

Aza-m-Xylylene Diradical with Increased Steric Protection of the Aminyl Radicals

Olankitwanit, A., Rajca, S. & Rajca, A., May 15 2015, In : Journal of Organic Chemistry. 80, 10, p. 5035-5044 10 p.

Research output: Contribution to journal › Article

Diamines
Hydrogen
Atoms
Chemical shift
Electrochemistry
2014
21 Citations (Scopus)

Synthesis of aza-m-xylylene diradicals with large singlet-triplet energy gap and statistical analyses of their EPR spectra

Olankitwanit, A., Pink, M., Rajca, S. & Rajca, A., Oct 8 2014, In : Journal of the American Chemical Society. 136, 40, p. 14277-14288 12 p.

Research output: Contribution to journal › Article

Ground state
Paramagnetic resonance
Half-Life
Energy gap
Temperature
18 Citations (Scopus)

Synthesis of unnatural amino acids functionalized with sterically shielded pyrroline nitroxides

Wang, Y., Paletta, J. T., Berg, K., Reinhart, E., Rajca, S. & Rajca, A., Oct 17 2014, In : Organic Letters. 16, 20, p. 5298-5300 3 p.

Research output: Contribution to journal › Article

amino acids
Gems
Amino Acids
glutathione
cysteine
2013
36 Citations (Scopus)

High-spin s = 2 ground state aminyl tetraradicals

Rajca, A., Olankitwanit, A., Wang, Y., Boratyński, P. J., Pink, M. & Rajca, S., Dec 4 2013, In : Journal of the American Chemical Society. 135, 48, p. 18205-18215 11 p.

Research output: Contribution to journal › Article

Exchange coupling
Excited states
Ground state
Discrete Fourier transforms
Dimers
2012
23 Citations (Scopus)

Band gap of carbon-sulfur [n]helicenes

Miyasaka, M., Pink, M., Olankitwanit, A., Rajca, S. & Rajca, A., Jun 15 2012, In : Organic Letters. 14, 12, p. 3076-3079 4 p.

Research output: Contribution to journal › Article

Sulfur
helices
Energy gap
sulfur
Carbon
18 Citations (Scopus)

Ladder oligo(m -aniline)s: Derivatives of azaacenes with cross-conjugated π-systems

Rajca, A., Boratyński, P. J., Olankitwanit, A., Shiraishi, K., Pink, M. & Rajca, S., Mar 2 2012, In : Journal of Organic Chemistry. 77, 5, p. 2107-2120 14 p.

Research output: Contribution to journal › Article

Ladders
Oligomers
Discrete Fourier transforms
Derivatives
Amination
88 Citations (Scopus)

Organic radical contrast agents for magnetic resonance imaging

Rajca, A., Wang, Y., Boska, M., Paletta, J. T., Olankitwanit, A., Swanson, M. A., Mitchell, D. G., Eaton, S. S., Eaton, G. R. & Rajca, S., Sep 26 2012, In : Journal of the American Chemical Society. 134, 38, p. 15724-15727 4 p.

Research output: Contribution to journal › Article

Magnetic resonance
Contrast Media
Magnetic Resonance Imaging
Imaging techniques
Dendrimers
65 Citations (Scopus)

Synthesis and reduction kinetics of sterically shielded pyrrolidine nitroxides

Paletta, J. T., Pink, M., Foley, B., Rajca, S. & Rajca, A., Oct 19 2012, In : Organic Letters. 14, 20, p. 5322-5325 4 p.

Research output: Contribution to journal › Article

Ascorbic Acid
Derivatives
Kinetics
ascorbic acid
kinetics
2011
23 Citations (Scopus)

Calix[4]arene nitroxide tetraradical and octaradical

Olankitwanit, A., Kathirvelu, V., Rajca, S., Eaton, G. R., Eaton, S. S. & Rajca, A., Jun 14 2011, In : Chemical Communications. 47, 22, p. 6443-6445 3 p.

Research output: Contribution to journal › Article

Scaffolds
Magnetic resonance imaging
Conformations
Tuning
Electrons
18 Citations (Scopus)

Oxidation of annelated diarylamines: Analysis of reaction pathways to nitroxide diradical and spirocyclic products

Rajca, A., Shiraishi, K., Boratyński, P. J., Pink, M., Miyasaka, M. & Rajca, S., Oct 21 2011, In : Journal of Organic Chemistry. 76, 20, p. 8447-8457 11 p.

Research output: Contribution to journal › Article

Nuclear magnetic resonance
Discrete Fourier transforms
Oxidation
Paramagnetic resonance
X ray crystallography
48 Citations (Scopus)

Triplet ground state derivative of aza- m -xylylene diradical with large singlet-triplet energy gap

Rajca, A., Olankitwanit, A. & Rajca, S., Apr 6 2011, In : Journal of the American Chemical Society. 133, 13, p. 4750-4753 4 p.

Research output: Contribution to journal › Article

Ground state
Energy gap
Derivatives
Temperature
Molecules
2010
39 Citations (Scopus)

A spirocyclohexyl nitroxide amino acid spin label for pulsed EPR spectroscopy distance measurements

Rajca, A., Kathirvelu, V., Roy, S. K., Pink, M., Rajca, S., Sarkar, S., Eaton, S. S. & Eaton, G. R., May 17 2010, In : Chemistry - A European Journal. 16, 19, p. 5778-5782 5 p.

Research output: Contribution to journal › Article

Spin Labels
Distance measurement
Paramagnetic resonance
Amino acids
Labels
30 Citations (Scopus)

Asymmetric synthesis of chiral tetraphenylenes

Rajca, A. & Rajca, S., Jan 18 2010, In : Angewandte Chemie - International Edition. 49, 4, p. 672-674 3 p.

Research output: Contribution to journal › Article

Rhodium
Cycloaddition
Scaffolds
Substitution reactions
Ligands
37 Citations (Scopus)

Isolation of the triplet ground state aminyl diradical

Boratyński, P. J., Pink, M., Rajca, S. & Rajca, A., Jul 26 2010, In : Angewandte Chemie - International Edition. 49, 32, p. 5459-5462 4 p.

Research output: Contribution to journal › Article

Ground state
Exchange coupling
Dimers
Shielding
Energy gap
56 Citations (Scopus)

Radical cation of helical, cross-conjugated β-oligothiophene

Zak, J. K., Miyasaka, M., Rajca, S., Lapkowski, M. & Rajca, A., Mar 17 2010, In : Journal of the American Chemical Society. 132, 10, p. 3246-3247 2 p.

Research output: Contribution to journal › Article

Cations
Positive ions
Temperature
Dimerization
Sulfur
7 Citations (Scopus)

Spiro oligothiophenes

Miyasaka, M., Pink, M., Rajca, S. & Rajca, A., Jul 16 2010, In : Organic Letters. 12, 14, p. 3230-3233 4 p.

Research output: Contribution to journal › Article

Thiophenes
thiophenes
Trifluoroacetic Acid
musculoskeletal system
Skeleton
2009
47 Citations (Scopus)

Functionalized thiophene-based [7]helicene: Chirooptical properties versus electron delocalization

Rajca, A., Pink, M., Xiao, S., Miyasaka, M., Rajca, S., Das, K. & Plessel, K., Oct 2 2009, In : Journal of Organic Chemistry. 74, 19, p. 7504-7513 10 p.

Research output: Contribution to journal › Article

Thiophenes
Electrons
Bromine
X ray analysis
Sulfur
25 Citations (Scopus)

Intramolecular cyclization of thiophene-based [7]helicenes to quasi-[8]circulenes

Rajca, A., Miyasaka, M., Xiao, S., Boratyński, P. J., Pink, M. & Rajca, S., Dec 4 2009, In : Journal of Organic Chemistry. 74, 23, p. 9105-9111 7 p.

Research output: Contribution to journal › Article

Thiophenes
Cyclization
Pyrolysis
Vacuum
Atoms
48 Citations (Scopus)

Noncovalent interactions in the asymmetric synthesis of rigid, conjugated helical structures

Miyasaka, M., Pink, M., Rajca, S. & Rajca, A., Jul 27 2009, In : Angewandte Chemie - International Edition. 48, 32, p. 5954-5957 4 p.

Research output: Contribution to journal › Article

Enantioselectivity
Conformations
46 Citations (Scopus)

Stable diarylnitroxide diradical with triplet ground state

Rajca, A., Shiraishi, K. & Rajca, S., Sep 18 2009, In : Chemical Communications. 29, p. 4372-4374 3 p.

Research output: Contribution to journal › Article

Ground state
Temperature
2008
4 Citations (Scopus)

Chiral tetrathienylene: Synthesis and X-ray structure

Xiao, S., Pink, M., Wang, H., Rajca, S. & Rajca, A., Jun 1 2008, In : Journal of Sulfur Chemistry. 29, 3-4, p. 425-432 8 p.

Research output: Contribution to journal › Article

Thiophenes
X rays
Bromine
Chloroform
Conformations
33 Citations (Scopus)

Diarylnitroxide diradicals: Low-temperature oxidation of diarylamines to nitroxides

Rajca, A., Vale, M. & Rajca, S., Jul 16 2008, In : Journal of the American Chemical Society. 130, 28, p. 9099-9105 7 p.

Research output: Contribution to journal › Article

SQUIDs
Oxidation
Temperature
Paramagnetic resonance
Magnetic resonance spectroscopy
54 Citations (Scopus)

Impact of electron-electron spin interaction on electron spin relaxation of nitroxide diradicals and tetraradical in glassy solvents between 10 and 300 K

Sato, H., Kathirvelu, V., Spagnol, G., Rajca, S., Rajca, A., Eaton, S. S. & Eaton, G. R., Mar 13 2008, In : Journal of Physical Chemistry B. 112, 10, p. 2818-2828 11 p.

Research output: Contribution to journal › Article

electron spin
Electrons
Electron-electron interactions
Recovery
Glass
55 Citations (Scopus)

Synthesis, structure, and conformation of aza[1n]metacyclophanes

Vale, M., Pink, M., Rajca, S. & Rajca, A., Jan 4 2008, In : Journal of Organic Chemistry. 73, 1, p. 27-35 9 p.

Research output: Contribution to journal › Article

Amination
X ray crystallography
Oligomers
Conformations
Polymers
2007
26 Citations (Scopus)

1,3-Alternate calix[4]arene nitronyl nitroxide tetraradical and diradical: synthesis, X-ray crystallography, paramagnetic NMR spectroscopy, EPR spectroscopy, and magnetic studies

Rajca, A., Pink, M., Mukherjee, S., Rajca, S. & Das, K., Oct 29 2007, In : Tetrahedron. 63, 44, p. 10731-10742 12 p.

Research output: Contribution to journal › Article

Exchange coupling
X ray crystallography
X Ray Crystallography
Magnetic resonance
Scaffolds
75 Citations (Scopus)

Annelated, chiral π-conjugated systems: Tetraphenylenes and helical β-oligothiophenes

Rajca, A., Rajca, S., Pink, M. & Miyasaka, M., Jul 24 2007, In : Synlett. 12, p. 1799-1822 24 p.

Research output: Contribution to journal › Article

Dimers
Graphite
Sulfur
Carbon
Derivatives
56 Citations (Scopus)

Conformationally constrained, stable, triplet ground state (S = 1) nitroxide diradicals. Antiferromagnetic chains of S = 1 diradicals

Rajca, A., Takahashi, M., Pink, M., Spagnol, G. & Rajca, S., Aug 22 2007, In : Journal of the American Chemical Society. 129, 33, p. 10159-10170 12 p.

Research output: Contribution to journal › Article

Ground state
Magnetic Resonance Spectroscopy
Temperature
X ray crystallography
X Ray Crystallography
31 Citations (Scopus)

Efficient synthesis of tricyclic benzobisoxazines by silica gel catalysis

Spagnol, G., Rajca, A. & Rajca, S., Mar 2 2007, In : Journal of Organic Chemistry. 72, 5, p. 1867-1869 3 p.

Research output: Contribution to journal › Article

Silica Gel
Catalysis
Oxazines
Condensation reactions
Ketones
14 Citations (Scopus)

Helically annelated and cross-conjugated β-oligothiophenes: A fourier transform Raman spectroscopic and quantum chemical density functional theory study

Malavé Osuna, R., Ponce Ortiz, R., Hernández, V., López Navarrete, J. T., Miyasaka, M., Rajca, S., Rajca, A. & Glaser, R., Mar 29 2007, In : Journal of Physical Chemistry C. 111, 12, p. 4854-4860 7 p.

Research output: Contribution to journal › Article

Thiophenes
Molecular orbitals
Thiophene
thiophenes
Density functional theory
60 Citations (Scopus)

Triplet (S = 1) ground state aminyl diradical

Rajca, A., Shiraishi, K., Pink, M. & Rajca, S., Jun 13 2007, In : Journal of the American Chemical Society. 129, 23, p. 7232-7233 2 p.

Research output: Contribution to journal › Article

Magnetometry
SQUIDs
Ground state
Paramagnetic resonance
Temperature
2006
62 Citations (Scopus)

Exchange coupling mediated through-bonds and through-space in conformationally constrained polyradical scaffolds: Calix[4]arene nitroxide tetraradicals and diradical

Rajca, A., Mukherjee, S., Pink, M. & Rajca, S., Oct 18 2006, In : Journal of the American Chemical Society. 128, 41, p. 13497-13507 11 p.

Research output: Contribution to journal › Article

Exchange coupling
Scaffolds
Cones
Conformations
Magnetic Resonance Spectroscopy
21 Citations (Scopus)

Synthesis and structure of a nucleoside with π-conjugated nitroxide spin label forming a one-dimensional ferromagnetic chain

Das, K., Pink, M., Rajca, S. & Rajca, A., Apr 26 2006, In : Journal of the American Chemical Society. 128, 16, p. 5334-5335 2 p.

Research output: Contribution to journal › Article

Spin Labels
Deoxyuridine
Nucleosides
Labels
Hydrogen
2005
126 Citations (Scopus)

Cross-conjugated oligothiophenes derived from the (C2S) n helix: Asymmetric synthesis and structure of carbon-sulfur [11]helicene

Miyasaka, M., Rajca, A., Pink, M. & Rajca, S., Oct 12 2005, In : Journal of the American Chemical Society. 127, 40, p. 13806-13807 2 p.

Research output: Contribution to journal › Article

Sparteine
Optical band gaps
Sulfur
Polymers
Carbon
32 Citations (Scopus)

Stable hydrocarbon diradical, an analogue of trimethylenemethane

Rajca, A., Shiraishi, K., Vale, M., Han, H. & Rajca, S., Jun 29 2005, In : Journal of the American Chemical Society. 127, 25, p. 9014-9020 7 p.

Research output: Contribution to journal › Article

Hydrocarbons
Paramagnetic resonance
SQUIDs
Ground state
Absorption spectra
31 Citations (Scopus)

Triplet ground state (S = 1) pegylated bis(aminoxyl) diradical: Synthesis and the effect of water on magnetic properties

Spagnol, G., Shiraishi, K., Rajca, S. & Rajca, A., Oct 28 2005, In : Chemical Communications. 40, p. 5047-5049 3 p.

Research output: Contribution to journal › Article

Ground state
Conformations
Magnetic properties
Water
57 Citations (Scopus)

π-conjugated conjoined double helicene via a sequence of three oxidative CC- and NN-homocouplings

Shiraishi, K., Rajca, A., Pink, M. & Rajca, S., Jul 6 2005, In : Journal of the American Chemical Society. 127, 26, p. 9312-9313 2 p.

Research output: Contribution to journal › Article

Benzoyl Peroxide
Benzoyl peroxide
Diamines
Dimerization
Dehydrogenation
2004
65 Citations (Scopus)

Chiral molecular glass: Synthesis and characterization of enantiomerically pure thiophene-based [7]helicene

Miyasaka, M., Rajca, A., Pink, M. & Rajca, S., Dec 3 2004, In : Chemistry - A European Journal. 10, 24, p. 6531-6539 9 p.

Research output: Contribution to journal › Article

Thiophenes
Chirality
Thiophene
Glass
Enantiomers