Probing of chain conformations in conjugated polymer nanoparticles by electron spin resonance spectroscopy.

ESR spectroscopy as a powerful tool for probing the quality of conjugated polymers designed for photovoltaic applications.

Here we report the application of the Electron Spin Resonance (ESR) spectroscopy as a highly sensitive analytical technique for assessment of the electronic quality of organic semiconductor materials, particularly conjugated polymers. It has been shown that different batches of the same conjugated polymer might contain substantially different amounts of radical species which were attributed to ...

Enhanced and selective delivery of enzyme therapy to 9L-glioma tumor via magnetic targeting of PEG-modified, β-glucosidase-conjugated iron oxide nanoparticles

The stability of enzyme-conjugated magnetic iron oxide nanoparticles in plasma is of great importance for in vivo delivery of the conjugated enzyme. In this study, β-glucosidase was conjugated on aminated magnetic iron oxide nanoparticles using the glutaraldehyde method (β-Glu-MNP), and further PEGylated via N-hydroxysuccinimide chemistry. The PEG-modified, β-glucosidase-immobilized magnetic ir...

Probing long-range carrier-pair spin–spin interactions in a conjugated polymer by detuning of electrically detected spin beating

UNLABELLED Weakly coupled electron spin pairs that experience weak spin-orbit interaction can control electronic transitions in molecular and solid-state systems. Known to determine radical pair reactions, they have been invoked to explain phenomena ranging from avian magnetoreception to spin-dependent charge-carrier recombination and transport. Spin pairs exhibit persistent spin coherence, all...

Electron Paramagnetic Resonance Studies of Polymer Chain Dynamics in Solution

Conformational changes at the nucleotide pocket of motor proteins monitored by electron paramagnetic resonance spectroscopy*

A fundamental goal in the field of motor proteins is to identify the conformational changes associated with the hydrolysis of the physiological substrate, ATP, and to define how these conformational changes are modulated by binding to the polymer track and translated into biologically useful movement. We have used electron paramagnetic resonance (EPR) spectroscopy to monitor conformational chan...