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Spin resonance of DNA-assembled and neat TIPS-pentacene. (a) Comparison of the early time spectrum integrated from 250 to 350 ns after laser flash for DNA-assembled pentacene at 50 K and a neat film of TIPS-PEN at 10 K. Spectra are offset in field by B0 = hf/gμb where f is the applied microwave frequency, h the Planck constant, g the Landé g-factor, and μb the Bohr magneton. The black line indicates the combined triplet and quintet spectra with relative weights given in (b).
