无机盐可靠性能检测 | 镁离子水合物（Mg(H2O)n]+, n = 20–70）的电子光谱与纳米量热法研究：自发形成水合电子？-北京欧兰科技发展有限公司

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应用领域	石油/化工
检测样本	无机盐
检测项目	可靠性能
参考标准	暂无

采用立陶宛EKSPLA公司NT342B-20-SH-SFG型纳秒波长可调谐光学参量振荡器（OPO）对镁离子水合物（Mg(H2O)n]+, n = 20–70）的电子光谱与纳米量热法进行了测量研究，讨论了是否会自发形成水合电子的问题。

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Ekspla NT340 高能量可调谐激光器（OPO）
型号：NT340

¥50万 - 100万
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Hydrated singly charged magnesium ions [Mg(H2O)n]+ are thought to consist of an Mg2+
ion and a hydrated electron for n > 15. This idea is based on mass spectra, which exhibit
a transition from [MgOH(H2O)n-1]+ to [Mg(H2O)n]+ around n = 15–22, black-body infrared
radiative dissociation, and quantum chemical calculations. Here, we present
photodissociation spectra of size–selected [Mg(H2O)n]+ in the range of n = 20–70
measured for photon energies of 1.0–5.0 eV. The spectra exhibit a broad absorption from
1.4 to 3.2 eV, with two local maxima around 1.7–1.8 eV and 2.1–2.5 eV, depending on
cluster size. The spectra shift slowly from n = 20 to n = 50, but no significant change is
observed for n = 50–70. Quantum chemical modeling of the spectra yields several
candidates for the observed absorptions, including five- and six-fold coordinated Mg2+ with
a hydrated electron in its immediate vicinity, as well as a solvent-separated Mg2+/e- pair. The photochemical behavior resembles the one of the hydrated electron, with barrierless
interconversion into the ground state following the excitation.

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