Suchada Rajca

  • 4187 Citations
  • 43 h-Index
1989 …2019
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Research Output 1989 2019

  • 4187 Citations
  • 43 h-Index
  • 85 Article
  • 2 Comment/debate
  • 2 Letter
  • 1 Conference article
26 Citations (Scopus)
Exchange coupling
X ray crystallography
X Ray Crystallography
Magnetic resonance
Scaffolds
8 Citations (Scopus)
Crystallography
X ray crystallography
X Ray Crystallography
Magnetism
Manganese
87 Citations (Scopus)

A dendritic macrocyclic organic polyradical with a very high spin of S = 10

Rajca, A., Wongsriratanakul, J., Rajca, S. & Cerny, R., May 18 1998, In : Angewandte Chemie - International Edition. 37, 9, p. 1229-1232 4 p.

Research output: Contribution to journalArticle

Ground state
Molecules
46 Citations (Scopus)

A Greek cross dodecaphenylene: Sparteine-mediated asymmetric synthesis of chiral D2-symmetric π-conjugated tetra-o-phenylenes

Rajca, A., Wang, H., Bolshov, P. & Rajca, S., Apr 23 2001, In : Tetrahedron. 57, 17, p. 3725-3735 11 p.

Research output: Contribution to journalArticle

Sparteine
Point groups
X ray crystallography
X Ray Crystallography
Crystal symmetry
28 Citations (Scopus)
Hydrocarbons
Ground state
SQUIDs
Isomers
Paramagnetic resonance
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 journalArticle

Dimers
Graphite
Sulfur
Carbon
Derivatives
97 Citations (Scopus)

Annelated heptathiophene: A fragment of a carbon - Sulfur helix

Rajca, A., Wang, H., Pink, M. & Rajca, S., Dec 15 2000, In : Angewandte Chemie - International Edition. 39, 24, p. 4481-4483 3 p.

Research output: Contribution to journalArticle

Thiophenes
Thiophene
Sulfur
Carbon
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 journalArticle

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 journalArticle

Rhodium
Cycloaddition
Scaffolds
Substitution reactions
Ligands
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 journalArticle

Diamines
Hydrogen
Atoms
Chemical shift
Electrochemistry
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 journalArticle

Sulfur
helices
Energy gap
sulfur
Carbon
66 Citations (Scopus)

Biphenylene dimer. Molecular fragment of a two-dimensional carbon net and double-stranded polymer

Rajca, A., Safronov, A., Rajca, S., Ross, C. R. & Stezowski, J. J., Aug 7 1996, In : Journal of the American Chemical Society. 118, 31, p. 7272-7279 8 p.

Research output: Contribution to journalArticle

Dimers
Anions
Polymers
Negative ions
Carbon
33 Citations (Scopus)

Boron-centred diradical dianion: A new triplet state molecule

Rajca, A., Rajca, S. & Desai, S. R., Dec 1 1995, In : Journal of the Chemical Society, Chemical Communications. 19, p. 1957-1958 2 p.

Research output: Contribution to journalArticle

Boron
Sodium
Molecules
2-methyltetrahydrofuran
tetrahydrofuran
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 journalArticle

Scaffolds
Magnetic resonance imaging
Conformations
Tuning
Electrons
48 Citations (Scopus)
Ground state
Paramagnetic resonance
Magnetization
Defects
Molecules
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 journalArticle

Thiophenes
Chirality
Thiophene
Glass
Enantiomers
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 journalArticle

Thiophenes
X rays
Bromine
Chloroform
Conformations
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 journalArticle

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

Control of Magnetic Interactions in Polyarylmethyl Triplet Diradicals Using Steric Hindrance

Rajca, A., Utamapanya, S. & Xu, J., Nov 1 1991, In : Journal of the American Chemical Society. 113, 24, p. 9235-9241 7 p.

Research output: Contribution to journalArticle

SQUIDs
Voltammetry
Ultraviolet spectroscopy
Paramagnetic resonance
Spectrum Analysis
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 journalArticle

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

D2-Symmetric dimer of 1,1'-binaphthyl and its chiral π-conjugated carbodianion

Rajca, A., Safronov, A., Rajca, S. & Wongsriratanakul, J., Apr 12 2000, In : Journal of the American Chemical Society. 122, 14, p. 3351-3357 7 p.

Research output: Contribution to journalArticle

Naphthalene
Dimers
Point groups
X ray crystallography
X Ray Crystallography
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 journalArticle

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

Double Helical Octaphenylene

Rajca, A., Safronov, A., Rajca, S. & Shoemaker, R., Jan 1 1997, In : Angewandte Chemie (International Edition in English). 36, 5, p. 488-491 4 p.

Research output: Contribution to journalArticle

Chirality
Polymers
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 journalArticle

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

Erratum: Organic radical contrast agents for magnetic resonance imaging (Journal of the American Chemical Society (2012) 134 (15724-15727) DOI: 10.1021/ja3079829)

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., Feb 26 2014, In : Journal of the American Chemical Society. 136, 8, 1 p.

Research output: Contribution to journalComment/debate

Magnetic resonance
Contrast Media
Magnetic Resonance Imaging
Imaging techniques
62 Citations (Scopus)
Exchange coupling
Scaffolds
Cones
Conformations
Magnetic Resonance Spectroscopy
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 journalArticle

Thiophenes
Electrons
Bromine
X ray analysis
Sulfur
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 journalArticle

Open Access
Gems
Spin Labels
Biocompatibility
Labeling
Paramagnetic resonance
2 Citations (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. 8, 8, 1 p.

Research output: Contribution to journalComment/debate

Open Access
Gems
Spin Labels
Biocompatibility
Paramagnetic resonance
Escherichia coli
141 Citations (Scopus)

Helically annelated and cross-conjugated oligothiophenes: Asymmetric synthesis, resolution, and characterization of a carbon-sulfur [7]helicene

Rajca, A., Miyasaka, M., Pink, M., Wang, H. & Rajca, S., Nov 24 2004, In : Journal of the American Chemical Society. 126, 46, p. 15211-15222 12 p.

Research output: Contribution to journalArticle

Thiophenes
Thiophene
Sulfur
Carbon
Enantiomers
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 journalArticle

Thiophenes
Molecular orbitals
Thiophene
thiophenes
Density functional theory

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 journalArticle

Enantiomers
Discrete Fourier transforms
Cations
Positive ions
Dibutyl Phthalate
44 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 journalArticle

Vacuum
Ground state
Technology
Temperature
Decomposition
56 Citations (Scopus)

High-spin polyarylmethyl polyradical: Fragment of a macrocyclic 2-strand based upon calix[4]arene rings

Rajca, A., Lu, K. & Rajca, S., Nov 25 1997, In : Journal of the American Chemical Society. 119, 43, p. 10335-10345 11 p.

Research output: Contribution to journalArticle

Temperature
Magnetometry
Electrons
Deuterium
SQUIDs
20 Citations (Scopus)

High-Spin Polymers. Synthesis of 1,3-Connected Polyarylmethane and Its Carbopolyanion and Polyradical

Utamapanya, S., Kakegawa, H., Bryant, L. & Rajca, A., Aug 1993, In : Chemistry of Materials. 5, 8, p. 1053-1055 3 p.

Research output: Contribution to journalArticle

Polymers
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 journalArticle

Exchange coupling
Excited states
Ground state
Discrete Fourier transforms
Dimers
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 journalArticle

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

Intramolecular antiferromagnetic vs ferromagnetic spin coupling through the biphenyl unit

Rajca, A. & Rajca, S., Aug 28 1996, In : Journal of the American Chemical Society. 118, 34, p. 8121-8126 6 p.

Research output: Contribution to journalArticle

Magnetometry
Isomers
Ground state
Spectrum Analysis
Theoretical Models
26 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 journalArticle

Thiophenes
Cyclization
Pyrolysis
Vacuum
Atoms
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 journalArticle

Isotopes
Hydrogen
Chemical activation
Atoms
Kinetics
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 journalArticle

Ground state
Exchange coupling
Dimers
Shielding
Energy gap
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 journalArticle

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

Macrocyclic π-Conjugated Carbopolyanions and Polyradicals Based upon Calix[4]arene and Calix[3]arene Rings

Rajca, A., Rajca, S. & Desai, S. R., Jan 1995, In : Journal of the American Chemical Society. 117, 2, p. 806-816 11 p.

Research output: Contribution to journalArticle

Oxidation
Polyethers
Voltammetry
Dimers
Nuclear magnetic resonance spectroscopy
298 Citations (Scopus)

Magnetic ordering in an organic polymer

Rajca, A., Wongsriratanakul, J. & Rajca, S., Nov 16 2001, In : Science. 294, 5546, p. 1503-1505 3 p.

Research output: Contribution to journalArticle

Polymers
Temperature
Magnetic Fields
Glass
4 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 journalArticle

Nuclear magnetic resonance
Polarization
electron spin
nuclear magnetic resonance
polarization
337 Citations (Scopus)
Magnesium Hydroxide
Magnesium Oxide
Magnesia
Crystallite size
Oxides
114 Citations (Scopus)

Nanoscale Metal Oxide Particles as Chemical Reagents. Intrinsic Effects of Particle Size on Hydroxyl Content and on Reactivity and Acid/Base Properties of Ultrafine Magnesium Oxide

Itoh, H., Utamapanya, S., Stark, J. V., Klabunde, K. J. & Schlup, J. R., Jan 1 1993, In : Chemistry of Materials. 5, 1, p. 71-77 7 p.

Research output: Contribution to journalArticle

Magnesium Oxide
Magnesia
Hydroxyl Radical
Oxides
Metals
19 Citations (Scopus)

Near-Degeneracy between the Low- and High-Spin States in an Alternant Hydrocarbon Diradical: Topology and Geometry

Rajca, A., Utamapanya, S. & Smithhisler, D. J., Jan 1 1993, In : Journal of Organic Chemistry. 58, 21, p. 5650-5652 3 p.

Research output: Contribution to journalArticle

Hydrocarbons
Topology
Magnetic fields
Hamiltonians
Geometry
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 journalArticle

Enantioselectivity
Conformations
67 Citations (Scopus)
Electrons
Molecules
Anions
Negative ions
Electrochemistry