Photoexcited Gd(OH2)3+8frees two water molecules to give*Gd(OH2)3+6in an entropy-controlled process (ΔSO∼ 9.5 cal/mol deg, ΔHO∼ 0.32 kcal/mol, ΔGO∼ -2.5 kcal/mol) and secondary excited-state processes. This inner-sphere change may be rationalised by different 4f-shell contraction and 5p-shell expansion in the lowest and excited levels of the 4f7configuration. © 1982.
Marcantonatos, M. D., Deschaux, M., & Vuilleumier, J. J. (1982). Changes in the inner coordination sphere as the primary chemical act of excited Gd3+aq. Chemical Physics Letters, 91(2), 149–157. https://doi.org/10.1016/0009-2614(82)80126-7