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Table 4 Room temperature Mössbauer parameters and the corresponding elemental analyses of complex 1a as well as the samples prepared by its dynamic heating up to 130–600°C

From: Thermal decomposition of [Co(en)3][Fe(CN)6]∙ 2H2O: Topotactic dehydration process, valence and spin exchange mechanism elucidation

Sample number

T [°C]

phase

δ [mm/s]

ΔEQ[mm/s]

Hhyp[T]

RA [%]

Elemental analyses [%]

Assignment

N

C

H

1a

25

LS Fe(III)

−0.17

0.85

100

34.4

29.8

5.5

[CoIII(en)3][FeIII(CN)6] 2H2O

1b

130

LS Fe(III)

−0.15

0.98

100

36.0

31.2

5.4

[CoIII(en)3][FeIII(CN)6] ½H2O

2

240

HS Fe(II)

1.17

2.25

13.0

31.3

33.2

3.9

[FeII(en)2(μ-NC) CoIII(CN)4]

HS Fe(II)

1.31

2.53

11.4

HS Fe(II)

1.02

1.95

10.0

HS Fe(III)

0.22

0.60

65.6

[FeIII(NH2CH2CH3)2(μ-NC)2 CoII(CN)3]

3

300

HS Fe(II)

1.14

2.49

18.4

26.8

31.9

3.0

[FeII(en)2(μ-NC) CoIII(CN)4]

HS Fe(III)

0.25

0.45

81.6

[FeIII(NH2CH2CH3)2(μ-NC)2 CoII(CN)3]

4

350

HS Fe(III)

0.26

0.43

55.7

19.9

22.8

2.0

[FeIII(NH2CH2CH3)2(μ-NC)2 CoII(CN)3]

HS Fe(III)

0.46

1.22

44.3

FeIII[CoII(CN)5]

5

400

HS Fe(III)

0.31

0.76

100

0

0

0

CoFe2O4 (SP)

6

450

HS Fe(III)

0.31

0.82

46.8

0

0

0

CoFe2O4 (SP)

HS Fe(III)

0.29

−0.01

42.6

53.2

CoFe2O4

7

600

HS Fe(III)

0.31

0.53

3.4

0

0

0

CoFe2O4 (SP)

HS Fe(III)

0.29

−0.01

48.6

79.1

CoFe2O4

HS Fe(III)

0.37

−0.05

51.4

17.5

CoFe2O4

  1. (LS) low-spin state, (HS) high-spin state, (SP) superparamagnetic particles, (RA) relative abundance.