geminate ion pair

https://doi.org/10.1351/goldbook.GT07387
Ion pair formed from a precursor that constitutes a single kinetic entity, i.e., by electron transfer or ion transfer in an encounter complex (cf. collision complex) or by ionic dissociation of a single molecular entity.
Source:
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 347 [Terms] [Paper]