Steady-state and ultrafast vibrational spectroscopy can help to elucidate the interactions between small anions and their environment because the anions’ infrared absorption frequencies and vibrational energy relaxation (VER) times depend strongly on those interactions. Their strong infrared absorptions also make many of these anions promising candidates for strong coupling to optical fields. Here, we report the vibrational energy relaxation of dicyanamide (DCA) in H₂O and D₂O and find that the so-called solvent isotope effect on VER is not as pronounced as for other anions. In addition, we report the infrared spectroscopy and VER lifetimes of DCA, N₃⁻, and NCS⁻ embedded in a polyelectrolyte polymer. We find that the polymer matrix accelerates VER in a similar fashion to H₂O, but the detailed mechanism of this acceleration remains unclear.

稳态和超快振动光谱可以帮助阐明小阴离子与其环境之间的相互作用，因为阴离子的红外吸收频率和振动能量弛豫（VER）时间很大程度上取决于这些相互作用。它们的强红外吸收性也使许多这些阴离子成为与光场强耦合的有希望的候选者。在这里，我们报告了H ₂ O和D ₂ O中双氰胺（DCA）的振动能弛豫，发现所谓的溶剂同位素对VER的影响不如其他阴离子明显。此外，我们报告的红外光谱和VER使用寿命期DCA的，N ₃ ^- ，和NCS ^-嵌入聚电解质聚合物中。我们发现聚合物基体以类似于H ₂ O的方式加速VER ，但是这种加速的详细机理仍不清楚。