Advances in singlet oxygen chemistry. Tetrahedron. 2005, 61 (28): 6665–6691. doi:10.1016/j.tet.2005.04.017.  Ogilby PR. Singlet oxygen: there is indeed

Hasegawa: Direct measurements of absolute concentration and lifetime of singlet oxygen in the gas phase by electron paramagnetic resonance. In: Chemical Physics

Synthesis of Pyridylanthracenes and Their Reversible Reaction with Singlet Oxygen to Endoperoxides. J. Org. Chem. 2017, 82, 17, 9258–9262. VP1 crystal

般被称为“衰变”（decay），它是“激发”的逆过程。 持续时间较长的激发态被叫做亚稳态（metastable）。同质异能素与单线态氧（singlet oxygen）就是其中的两个例子。 一般以最简单的氢原子为模型来讨论这一概念。 氢原子的基态对应的是氢原子中唯一的一个电子处于可能达到的最低的原子轨

Karatas, Juyoung Yoon, Engin U. Akkaya. Remote-Controlled Release of Singlet Oxygen by the Plasmonic Heating of Endoperoxide-Modified Gold Nanorods: Towards