Thermal effects on energetics and dynamics in water cluster anions (H2O)n(-) |
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Authors: | Young Ryan M Yandell Margaret A King Sarah B Neumark Daniel M |
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Affiliation: | Department of Chemistry, University of California, Berkeley, California 94720, USA. |
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Abstract: | The electron binding energies and relaxation dynamics of water cluster anions (H(2)O)(n)(-) (11 ≤ n ≤ 80) formed in co-expansions with neon were investigated using one-photon and time-resolved photoelectron imaging. Unlike previous experiments with argon, water cluster anions exhibit only one isomer class, the tightly bound isomer I with approximately the same binding energy as clusters formed in argon. This result, along with a decrease in the internal conversion lifetime of excited (H(2)O)(n)(-) (25 ≤ n ≤ 40), indicates that clusters are vibrationally warmer when formed in neon. Over the ranges studied, the vertical detachment energies and lifetimes appear to converge to previously reported values. |
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