Department of Chemistry, Durham University, DH1 3LE, Durham, County of Durham, UK.
Phys Chem Chem Phys. 2019 Nov 28;21(44):24286-24290. doi: 10.1039/c9cp04942h. Epub 2019 Oct 30.
Dipole-bound states (DBSs) are diffuse non-valence molecular orbitals of anions where the electron is bound by the permanent dipole moment of the neutral core. Here, an experimental study of the stability of such orbitals under the influence of a perturbing molecular alkyl chain is presented. Photodetachment action and photoelectron imaging spectroscopy of five para-substituted phenolate anions with progressively longer alkyl chains show that the DBS survives in all cases, suggesting that the perturbation of the orbital is not critical to the existence of the DBS.
偶极束缚态（DBS）是阴离子的弥散非价分子轨道，其中电子被中性核的永久偶极矩束缚。在这里，呈现了一项关于在扰动分子烷基链影响下此类轨道稳定性的实验研究。五个对位取代的酚盐阴离子的光电子离解作用和光电子成像光谱学研究，这些阴离子具有逐渐增长的烷基链，表明在所有情况下 DBS 都能存活，这表明轨道的扰动对于 DBS 的存在并不是关键的。
