Table 1 Temperature variation of long-term decay constants, kTbEu and kTb, for 5D4 Tb3+ emission in cycTb-phEu and cycTb-phen

From: A stoichiometric terbium-europium dyad molecular thermometer: energy transfer properties

Temp (K)

Rate constant (s−1)

k TbEu

k Tb

kET'

k ET

kET”

k r

10

2398

1555

843

943

35,507

32,062

50

2421

1545

876

1103

29,165

27,863

100

2740

1523

1217

1493

34,131

49,826

150

3086

1583

1503

2118

51,931

64,851

200

3751

1563

2188

3494

117,128

84,531

250

5618

1687

3931

5858

132,653

89,047

298

8811

1714

7096

21678

159,544

123,854

  1. Temperature variation of Tb–Eu energy transfer rates deduced from the long-term lifetimes (kTbEu–kTb = kET’), direct subtraction of decay curves (1/τ1 = kET, with τ1 from Table S8), and steady-state lifetimes (1/τST(cycTb-phEu)–1/τST(cycTb-phen) = kET”, with τST from Tables S4 and S7). The steady-state lifetime is determined by integration of the decay curves: \(\tau _{{\mathrm{ST}}} = \mathop {\int }\limits_0^\infty \frac{{I(t)}}{{I(0)}}dt,\) refer to the discussion above Table S3. The fitted parameter kr = 1/τ2 is from Table S7
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