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. Author manuscript; available in PMC: 2014 Apr 1.
Published in final edited form as: Inorg Chem. 2013 Mar 21;52(7):4084–4096. doi: 10.1021/ic400227k

Table 2.

Luminescence lifetimes and calculated hydration numbers for Eu complexes

τH2O (ms) τD2O (ms) q
[Eu(L1)] 0.464 0.984 0.98
[Eu(L2)] 0.465 0.959 0.94
[Eu(L3)] 0.464 1.129 1.13
[Eu(L4)] 0.977 1.581 0.17
[Eu(L5)] 0.944 1.625 0.23
[Eu(L6)] - - 1a
a

Data could not be obtained due to low solubility of [Eu(L6)]. q = 1 is assumed based on a similar relaxivity of [Gd(L6)] to [Gd(L3)].