VOLUMETRIC PROPERTIES OF DL-ALANINE IN AQUEOUS SOLUTIONS OF TETRAFLUOROBORATE 1-BUTYL, 3-METHYLIMIDAZOLIUM AT DIFFERENT TEMPERATURES

Páez, Manuel S.; Páez, Francisco J.; Torres, Francisco J.

doi:10.5935/0100-4042.20160059

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Artigo • Quím. Nova 39 (05) • June 2016 • https://doi.org/10.5935/0100-4042.20160059 copy

VOLUMETRIC PROPERTIES OF DL-ALANINE IN AQUEOUS SOLUTIONS OF TETRAFLUOROBORATE 1-BUTYL, 3-METHYLIMIDAZOLIUM AT DIFFERENT TEMPERATURES

Authorship SCIMAGO INSTITUTIONS RANKINGS

Densities of DL-alanine in aqueous ionic liquid, 1-butyl, 3-methylimidazolium tetrafluoroborate solutions were measured from 283.15 to 313.15 K. The densities measured were used to calculate apparent molar volumes (V_Φ), apparent molar volume limits (V_Φ⁰⁾, transfer molar volume limits (ΔV_Φ⁰⁾ and hydration number (NH). The behavior of (ΔV_Φ⁰⁾ was interpreted in terms of solute-solvent interactions on the basis of the cosphere overlap model. The hydration numbers were positive and explained by dehydration and electrostriction.

Keywords:
volumetric properties; ionic liquids; hydration number

Solvente seudobinario	0.1000	0.2000	0.3000	0.4000	0.5000	0.8000	1.0040
Parámetros de ajuste de la ecuación (1)
a	0.9051865	2.0052511	2.9640396	3.7197211	4.4620400	6.2552285	7.2175714
b	0.0385153	0.0300217	0.0884502	-0.0005426	0.0337465	0.0255694	0.0571851
c	0.0001975	-0.0106395	-0.0200580	-0.0274421	-0.0347091	-0.0522350	-0.0616487
d	-0.0634759	-0.1025910	-0.0881999	-0.0976932	-0.1170470	-0.1381559	-0.1902430
e	2.815E-06	3.855E-05	6.952E-05	9.370E-05	0.0001175	0.0001750	0.0002059
f	-0.0000175	4.807E-05	-3.502E-04	2.561E-04	3.394E-05	1.104E-04	-7.531E-05
g	0.2939288	0.3445261	0.3246210	0.3667170	0.5671414	0.6232306	0.7103785
h	-8.061E-09	-4.737E-08	-8.137E-08	-1.078E-07	-1.339E-07	-1.968E-07	-2.307E-07
i	-1.882E-08	-1.383E-07	5.365E-07	-4.921E-07	-1.107E-07	-2.539E-07	2.577E-08
j	5.3895E-05	0.0001560	0.0001206	0.0001326	0.0000802	0.0001144	0.0002620
σ	1.0306E-05	2.027E-05	3.026E-05	4.588E-05	5.914E-05	7.933E-05	9.100E-05

m_Alan mol•Kg^-1	0.0100	0.0300	0.0500	0.0700	0.0900	0.1000
Solvente seudobinario	T=283.15 K
0.0000	52.90	57.50	59.60	60.00	60.20	60.30
0.1000	55.92	57.90	58.55	58.64	58.63	58.62
0.2000	55.70	57.77	58.52	58.56	58.54	58.54
0.3000	55.55	57.63	58.29	58.48	58.46	58.45
0.4000	55.00	57.29	58.12	58.34	58.30	58.28
0.5000	53.85	56.14	57.37	57.72	57.68	57.65
0.8000	52.37	54.16	55.56	56.15	56.12	56.10
1.0040	50.24	52.47	54.00	54.65	54.64	54.64
	T=288.15 K
0.0000	53.64	58.56	60.04	60.33	60.56	60.68
0.1000	56.07	58.02	58.68	58.76	58.74	58.73
0.2000	56.01	57.90	58.58	58.67	58.65	58.64
0.3000	55.81	57.75	58.47	58.57	58.54	58.53
0.4000	55.33	57.54	58.33	58.43	58.40	58.38
0.5000	54.17	56.34	57.49	57.87	57.84	57.82
0.8000	56.26	56.26	56.26	56.26	56.26	56.26
1.0040	50.57	52.76	54.30	54.99	54.99	54.98
	T=293.15 K
0.0000	54.59	59.25	60.48	60.64	60.81	60.91
0.1000	56.32	58.20	58.79	58.91	58.88	58.87
0.2000	56.21	57.98	58.67	58.78	58.74	58.71
0.3000	56.18	58.08	58.73	58.84	58.83	58.82
0.4000	55.62	57.67	58.45	58.58	58.52	58.49
0.5000	54.50	56.54	57.70	58.06	58.02	58.01
0.8000	52.90	54.71	56.00	56.47	56.43	56.42
1.0040	50.90	53.16	54.85	55.25	55.24	55.23
	T=298.15 K
0.0000	55.51	59.63	60.68	60.96	61.09	61.21
0.1000	56.55	58.42	58.92	59.06	59.03	59.02
0.2000	56.40	58.21	58.82	58.95	58.90	58.89
0.3000	56.38	58.22	58.90	58.98	58.96	58.95
0.4000	55.91	57.95	58.68	58.75	58.70	58.66
0.5000	54.80	56.76	57.90	58.23	58.18	58.16
0.8000	53.18	54.90	56.20	56.65	56.60	56.59
1.0040	51.20	53.46	55.06	55.40	55.36	55.36
	T= 303.15 K
0.0000	56.42	60.37	60.94	61.17	61.34	61.47
0.1000	56.98	58.67	59.12	59.27	59.23	59.21
0.2000	56.53	58.40	58.92	59.15	59.10	59.08
0.3000	56.47	58.33	58.99	59.11	59.06	59.04
0.4000	56.20	58.20	58.86	58.95	58.89	58.86
0.5000	55.06	56.92	58.11	58.38	58.32	58.29
0.8000	53.48	55.23	56.40	56.92	56.88	56.85
1.0040	51.56	53.80	55.28	55.62	55.57	55.54
	T=308.15 K
0.0000	57.56	60.73	61.39	61.52	61.73	61.84
0.1000	57.15	58.90	59.42	59.54	59.48	59.45
0.2000	56.70	58.60	59.12	59.33	59.24	59.19
0.3000	56.57	58.47	59.13	59.23	59.15	59.09
0.4000	56.50	58.52	59.14	59.18	59.10	59.07
0.5000	55.47	57.12	58.25	58.60	58.51	58.47
0.8000	53.84	55.53	56.66	57.12	57.07	57.04
1.0040	51.96	54.08	55.58	55.85	55.81	55.79
	T=313.15 K
0.0000	58.46	61.15	61.59	61.86	62.03	62.09
0.1000	57.40	59.06	59.60	59.74	59.66	59.61
0.2000	57.00	58.74	59.26	59.49	59.37	59.30
0.3000	56.73	58.63	59.22	59.32	59.27	59.24
0.4000	56.83	58.68	59.30	59.43	59.34	59.31
0.5000	55.71	57.27	58.42	58.88	58.77	58.69
0.8000	54.22	55.80	56.93	57.39	57.32	57.26
1.0040	52.36	54.37	55.83	56.18	56.11	56.08

Solvente seudobinario	0.1000	0.2000	0.3000	0.4000	0.5000	0.8000	1.0040
T/K	V_φ⁰/cm³ moL^-1
283.15	58.70	58.61	58.57	58.47	57.88	56.27	54.67
288.15	58.83	58.73	58.67	58.57	58.00	56.39	55.02
293.15	59.01	58.93	58.89	58.79	58.18	56.58	55.30
298.15	59.16	59.09	59.05	58.95	58.40	56.78	55.48
303.15	59.41	59.33	59.26	59.16	58.62	57.07	55.79
308.15	59.75	59.64	59.55	59.45	58.92	57.31	56.00
313.15	60.05	59.92	59.82	59.72	59.31	57.71	56.42

T/K	283.15	288.15	293.15	298.15	303.15	308.15	313.15
Solvente seudobinario	V_φ⁰/cm³ moL^-1
0.1000	-0.37	-0.79	-1.03	-1.09	-1.15	-1.17	-1.15
0.2000	-0.46	-0.89	-1.11	-1.16	-1.23	-1.28	-1.28
0.3000	-0.50	-0.95	-1.15	-1.20	-1.31	-1.37	-1.38
0.4000	-0.60	-1.05	-1.25	-1.30	-1.41	-1.47	-1.48
0.5000	-1.19	-1.62	-1.86	-1.85	-1.94	-2.00	-1.89
0.8000	-2.80	-3.23	-3.46	-3.47	-3.49	-3.61	-3.49
1.0040	-4.40	-4.60	-4.74	-4.77	-4.77	-4.92	-4.78

T (K)	Solvente seudobinario
T (K)	0.0000	0.1000	0.2000	0.3000	0.4000	0.5000	0.8000	1.0040
283.15	7.7	8.3	8.3	8.4	8.4	8.6	9.2	9.8
288.15	6.4	7.8	7.8	7.8	7.9	8.1	8.6	9.1
293.15	5.6	7.3	7.3	7.3	7.4	7.6	8.1	8.5
298.15	5.2	6.9	6.9	6.9	6.9	7.1	7.6	8.0
303.15	4.7	6.3	6.3	6.4	6.4	6.5	7.0	7.3
308.15	4.0	5.6	5.7	5.7	5.7	5.9	6.3	6.6
313.15	3.4	4.9	4.9	4.9	5.0	5.1	5.4	5.7

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