This book covers the basic theory and techniques as well as various applications of pulsed
electron-electron double resonance (PELDOR or DEER). This electron paramagnetic resonance
technique is able to measure the distances and the distribution of distances between electron
spins in the 1.5-15 nanometer scale to determine the geometry of spin-labeled molecules to
estimate the number of interacting spins in spin clusters and to characterize the spatial
distribution of paramagnetic centers. As a result PELDOR is now a popular method in EPR
spectroscopy particularly in the context of biologically important systems and soft matter and
is also applied to problems in physical chemistry biochemistry polymers soft matter and
materials. Enabling readers to gain an understanding of the fundamentals of the PELDOR methods
and an appreciation of the opportunities PELDOR provides the book helps readers solve their
own physical and biochemical problems.