Hyperquenched glassy films of water: A study by hole burning

摘要: The results of infrared absorption (-OH) experiments and nonphotochemical hole-burning aluminum-phthalocyanine-tetrasulfonate (ATP) in hyperquenched glassy films water (HGW) are reported. Zero-phonon hole widths were usually determined for a burning reading temperature 5 K. Hole growth kinetics always monitored at It was found, example, that HGW annealed or deposited 140 K yields zero-phonon width 180 MHz, factor 3 times narrower than the formed T{sub D} = Decrease with annealing onsets A} nearly equals 90 Both unannealed yielded T{sup 1.3} power law dependence on ({<=}10 K), proving pure dephasing/spectral diffusion is governed by electron-TLS{sub int} (intrinsic two-level systems) interaction. An interpretation aforementioned configuration relaxation, onsetting K, terms TLS{sub model given. ATP turns out to be most efficient system yet discovered, an average quantum yield as high 0.18. (The S{sub 1} lifetime 4.8 ns.)more » Remarkably, essentially inoperative cubic ice warming HGW. However, this cessation consistent current mechanism burning. 62 refs., 10 figs., 2 tabs.« less