Abstract
A simple and sensitive near-null technique for multichannel nanosecond time-resolved magnetic optical rotatory dispersion measurements is introduced with a theoretical analysis describing the basis of the technique and the effects of optical imperfections, photoselection-induced linear dichroism and birefringence, and the Faraday rotation of the solvent and cell windows. This treatment identifies a potential artifact in photolyzed samples that is associated with the coupling of photoselection-induced linear dichroism with the solvent−cell Faraday rotation. Excitation geometries that minimize this problem are described. Experimental applications of the technique to the ligand rebinding reaction of myoglobin−CO after ligand photolysis are presented in the following article.
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