A <sup>13</sup>C‐Labeled Triarylmethyl Radical as an EPR Spin Probe Highly Sensitive to Molecular Tumbling
Martin Poncelet, Benoît Driesschaert
Abstract
Abstract A stable triarylmethyl spin probe whose electron paramagnetic resonance (EPR) spectrum is highly sensitive to molecular tumbling is reported. The strong anisotropy of the hyperfine coupling tensor with the central carbon of a 13 C 1 ‐labeled triarylmethyl radical enables the measurement of the probe rotational correlation time with applications to measure microviscosity and molecular dynamics.
Topics & Concepts
MicroviscosityElectron paramagnetic resonanceSpin probeRotational correlation timeChemistryHyperfine structureNuclear magnetic resonanceAnisotropyMolecular dynamicsSpin (aerodynamics)Chemical physicsAtomic physicsComputational chemistryPhysicsMembraneBiochemistryQuantum mechanicsThermodynamicsElectron Spin Resonance StudiesLanthanide and Transition Metal ComplexesMagnetism in coordination complexes