We report that tetrathiatriarylmethyl (trityl) EPR probes are chiral molecules at room temperature, the two stereoisomers that differ in their helicity being configurationally stable enough to be separated and stored independently.
Driesschaert, B., Robiette, R., Lucaccioni, F., Gallez, B., & Marchand-Brynaert, J. (2011). Chiral properties of tetrathiatriarylmethyl spin probes. Chemical Communications, 47(16), 4793-4795. https://doi.org/10.1039/c1cc10988j (Original work published 2011)