Photon-gated photochemical hole burning by two-color sensitization of a photoreactive polymer via triplet-triplet energy transfer

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Abstract
A new system of photon‐gated photochemical hole burning is presented: zinc‐tetratolyl‐tetrabenzoporphine in glycidyl azide polymer matrix. The two‐color irradiation with dye laser and Ar+ laser at 20 K forms holes 500 times more efficiently than the one‐color irradiation with dye laser alone. No change in the area of Q‐band in the absorption spectra of the guest molecules during hole formation indicates that the sensitized decomposition of azide groups via triplet‐triplet energy transfer from the higher excited triplet state of the guest molecules causes the change in guest‐host interaction leading to the hole formation.