Table 1 Fluorescence lifetimes of 1c and 1w in the presence of TNP in chloroform and in water

From: Mechanistic insight into the sensing of nitroaromatic compounds by metal-organic frameworks

Solvent

Amount of TNP (1 mm) added/μL

a 1

τ 1/ns

a 2

τ 2/ns

a 3

τ 3/ns

τ av/ns

Chloroform

0

0.23

0.49

0.46

2.08

0.31

5.06

2.65

40

0.26

0.47

0.46

1.74

0.28

3.34

1.85

80

0.41

0.44

0.55

1.33

0.04

3.44

1.04

120

0.53

0.42

0.45

1.19

0.02

4.21

0.84

160

0.54

0.39

0.44

1.10

0.02

4.52

0.76

200

0.65

0.36

0.34

0.98

0.01

5.11

0.62

Water

0

0.41

0.48

0.52

1.43

0.07

2.73

1.12

40

0.35

0.54

0.57

1.47

0.08

2.78

1.25

80

0.32

0.59

0.58

1.48

0.10

2.72

1.32

120

0.38

0.56

0.58

1.49

0.04

3.21

1.21

160

0.38

0.59

0.58

1.49

0.04

3.23

1.23

200

0.38

0.66

0.60

1.74

0.02

4.64

1.38

  1. IF(t) = a1exp(−t/τ1) + a2exp(−t/τ2) + a3exp(−t/τ3), where a1 + a2 + a3 = 1 and τav = a1τ1 + a2τ2 + a3τ3