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Table 6 Values of acoustic impedance (Z), \(\text{l}\) owering in isentropic compressibility (ΔKs) and and relative lowering of isentropic compressibility (ΔKr) for QUE and 7-HF with NAM of different concentrations in hydro-ethanolic medium at different temperatures

From: Studies on solute–solute and solute–solvent interactions of quercetin and 7-hydroxy flavone with nicotinamide in hydro-ethanolic mixed solvents: bioflavonoid-HBD interactions by volumetric and acoustic analysis

\(\text{Temp}/\)K

\(\text{m}\)/mol \({\text{kg}}^{-1}\)

Zkg \({\text{m}}^{-2}{\text{s}}^{-1}\)

ΔKs × \({10}^{11}\) /\({\text{m}}^{2}{\text{N}}^{-1}\)

ΔKr × \({10}^{2}\)

 

QUE

7-HF

QUE

7-HF

QUE

7-HF

30 v/v EtOH + 0.5 m NAM

       

293.15

0.0015

15.40

15.33

3.48

3.57

7.90

8.09

 

0.0020

15.34

15.25

3.21

3.15

7.30

7.14

 

0.0025

15.24

15.20

2.86

2.89

6.49

6.56

 

0.0030

15.15

15.13

2.51

2.62

5.69

5.95

 

0.0035

15.06

15.07

2.15

2.35

4.88

5.33

 

0.0040

14.97

15.01

1.79

2.07

4.07

4.68

298.15

0.0015

15.41

15.33

3.31

3.38

7.57

7.71

 

0.0020

15.35

15.25

3.06

2.96

6.99

6.76

 

0.0025

15.25

15.19

2.69

2.72

6.16

6.20

 

0.0030

15.16

15.13

2.34

2.45

5.35

5.59

 

0.0035

15.07

15.08

1.99

2.18

4.55

4.98

 

0.0040

14.98

15.01

1.63

1.90

3.72

4.33

303.15

0.0015

15.41

15.32

2.95

2.99

6.82

6.90

 

0.0020

15.35

15.24

2.70

2.58

6.23

5.95

 

0.0025

15.26

15.19

2.35

2.35

5.42

5.43

 

0.0030

15.17

15.14

2.00

2.10

4.61

4.84

 

0.0035

15.08

15.08

1.65

1.83

3.80

4.21

 

0.0040

14.99

15.01

1.29

1.55

2.97

3.57

30 v/v EtOH + 1.0 m NAM

293.15

0.0015

15.64

15.55

1.78

1.64

4.25

3.91

 

0.0020

15.59

15.50

1.56

1.42

3.71

3.38

 

0.0025

15.53

15.45

1.28

1.17

3.05

2.80

 

0.0030

15.45

15.38

9.60

0.89

2.29

2.12

 

0.0035

15.36

15.31

6.28

0.59

1.50

1.40

 

0.0040

15.23

15.23

6.16

0.27

0.15

0.65

298.15

0.0015

15.66

15.60

1.82

1.79

4.35

4.27

 

0.0020

15.62

15.56

1.60

1.57

3.84

3.76

 

0.0025

15.55

15.46

1.33

1.13

3.18

2.70

 

0.0030

15.47

15.40

1.02

0.86

2.43

2.06

 

0.0035

15.39

15.33

6.91

0.56

1.65

1.34

 

0.0040

15.26

15.25

1.31

0.25

0.31

0.60

303.15

0.0015

15.64

15.61

1.87

2.04

4.48

4.86

 

0.0020

15.60

15.57

1.66

1.83

3.98

4.37

 

0.0025

15.54

15.52

1.41

1.60

3.38

3.81

 

0.0030

15.47

15.46

1.12

1.34

2.69

3.20

 

0.0035

15.38

15.38

7.90

1.05

1.89

2.51

 

0.0040

15.26

15.31

2.39

0.75

0.57

1.79

40 v/v EtOH + 0.5 m NAM

293.15

0.0015

15.02

14.58

2.45

0.78

5.50

1.73

 

0.0020

14.97

14.54

2.22

0.52

4.99

1.16

 

0.0025

14.88

14.47

1.74

0.22

3.89

0.49

 

0.0030

14.76

14.41

1.18

− 0.11

2.64

− 0.24

 

0.0035

14.64

14.34

5.79

− 0.43

1.30

− 0.96

 

0.0040

14.55

14.28

1.93

− 0.74

0.43

− 1.64

298.15

0.0015

15.01

14.68

2.50

1.32

5.61

2.95

 

0.0020

14.97

14.60

2.28

0.85

5.13

1.91

 

0.0025

14.88

14.50

1.81

0.34

4.06

0.76

 

0.0030

14.77

14.44

1.27

0.02

2.86

0.05

 

0.0035

14.64

14.37

6.88

− 0.31

1.54

− 0.68

 

0.0040

14.55

14.31

2.89

− 0.62

0.65

− 1.38

303.15

0.0015

15.01

14.79

2.54

1.77

5.72

3.97

 

0.0020

14.97

14.75

2.33

1.54

5.24

3.45

 

0.0025

14.89

14.66

1.87

1.05

4.20

2.36

 

0.0030

14.78

14.53

1.34

0.31

3.02

0.69

 

0.0035

14.66

14.42

7.76

− 0.24

1.74

− 0.55

 

0.0040

14.58

14.36

4.05

− 0.57

0.91

− 1.27

40 v/v EtOH + 1.0 m NAM

293.15

0.0015

15.40

15.00

2.38

1.11

5.46

2.52

 

0.0020

15.30

14.96

1.90

0.88

4.38

2.00

 

0.0025

15.17

14.91

1.35

0.62

3.10

1.41

 

0.0030

15.08

14.86

9.67

0.34

2.22

0.78

 

0.0035

14.94

14.79

3.55

0.04

0.82

0.10

 

0.0040

14.84

14.73

− 4.00

− 0.25

− 0.09

− 0.57

298.15

0.0015

15.43

15.01

2.39

0.94

5.54

2.16

 

0.0020

15.34

14.96

1.94

0.72

4.49

1.65

 

0.0025

15.22

14.91

1.41

0.47

3.26

1.07

 

0.0030

15.09

14.85

8.23

0.19

1.91

0.44

 

0.0035

14.99

14.79

4.38

− 0.09

1.01

− 0.21

 

0.0040

14.88

14.73

2.42

− 0.39

0.06

− 0.89

303.15

0.0015

15.44

15.00

2.43

0.98

5.64

2.24

 

0.0020

15.35

14.96

2.00

0.76

4.64

1.73

 

0.0025

15.24

14.92

1.49

0.52

3.46

1.19

 

0.0030

15.11

14.86

9.18

0.25

2.13

0.57

 

0.0035

15.01

14.80

5.35

− 0.03

1.24

− 0.07

 

0.0040

14.90

14.74

1.10

− 0.33

0.25

− 0.75

  1. \(m\) signifies the molality of QUE and 7-HF per kg of the solvent (v/v EtOH + 0.5 m\(/\)1.0 NAM). The standard uncertainties (with 0.68 level of confidence) are \(\text{u}\left(m\right)\) = \({1\times 10}^{-3}{\text{mol kg}}^{-1}\), The standard uncertainty in composition of solvent (v/v EtOH + 0.5 m\(/\)1.0 NAM) is u(v/v) =  ± 0.01 v/v. \(\text{u}\left(\text{T}\right)\) = 0.01 K, \(\text{u}\left(\text{P}\right)\) = 1.0 kP
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BMC Chemistry

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