𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Dead-Time Free Measurement of Dipole–Dipole Interactions between Electron Spins

✍ Scribed by M Pannier; S Veit; A Godt; G Jeschke; H.W Spiess

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
210 KB
Volume
142
Category
Article
ISSN
1090-7807

No coin nor oath required. For personal study only.

✦ Synopsis

A four-pulse version of the pulse double electron-electron resonance (DEER) experiment is presented, which is designed for the determination of interradical distances on a nanoscopic lengthscale. With the new pulse sequence electron-electron couplings can be studied without dead-time artifacts, so that even broad distributions of electron-electron distances can be characterized. A version of the experiment that uses a pulse train in the detection period exhibits improved signal-to-noise ratio. Tests on two nitroxide biradicals with known length indicate that the accessible range of distances extends from about 1.5 to 8 nm. The four-pulse DEER spectra of an ionic spin probe in an ionomer exhibit features due to probe molecules situated both on the same and on different ion clusters. The former feature provides information on the cluster size and is inaccessible with previous methods.

📜 SIMILAR VOLUMES

Diffusion measurements free of motion ar
Diffusion measurements free of motion artifacts using intermolecular dipole-dipole interactions
✍ Scott D. Kennedy; Jianhui Zhong 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 469 KB

Diffusion encoding, or diffusion weighting, is commonly achieved by applying a pair of balanced pulsed-field gradients during spin evolution. An alternative way to obtain diffusion measurements is to select dipolar correlation distances using the distant dipolar field (DDF) in systems with abundant

Cross Correlation between the Dipole–Dip
Cross Correlation between the Dipole–Dipole Interaction and the Curie Spin Relaxation: The Effect of Anisotropic Magnetic Susceptibility
✍ Ivano Bertini; Jozef Kowalewski; Claudio Luchinat; Giacomo Parigi 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 77 KB

Cross-correlated relaxation caused by the interference of nuclear dipole-dipole interaction and the Curie spin relaxation (DD-CSR cross relaxation) is generalized to treat the case of anisotropic magnetic susceptibility, including the important case where the latter originates from zero-field splitt