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1 Electronic Supplementary Material (ESI) for New Journal of Chemistry. This journal is The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2017 Electronic Supplementary Information The role of non-covalent interaction for the adsorption of CO 2 and hydrocarbons with per-hydroxylated pillar[6]arene: A Computational Study Debashis Sahu, Kalyanashis Jana, and Bishwajit Ganguly * Computation and Simulation Unit, Analytical Discipline & Centralized Instrument Facility, and Academy of Scientific and Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar, Gujarat , India. ganguly@csmcri.org (Top View) E = -59.4, H = -54.0, H b = (Side view) (-12.8) Figure S1: B3LYP-D3/6-31G(d) calculated optimized structures of PA[6] with five CO 2 gas molecules and cooperative intermolecular interactions among the CO 2 gas molecules inside PA[6] cavity. Binding electronic energies ( E), binding enthalpies ( H), and binding enthalpies per gas molecule (H b ) are given in kcal/mol. All the distances are in angstroms (Ǻ) unit and aromatic rings of PA[6] are marked numerically.
2 (Top View) E = -33.6, H = -26.3, H b = -5.3 (Side view) 2.9 (-5.1) Figure S2: B3LYP-D3/6-31G(d) calculated optimized structures of PA[6] with five CH 4 gas molecules and cooperative intermolecular interactions among the CH 4 gas molecules inside PA[6] cavity. Binding electronic energies ( E), binding enthalpies ( H), and binding enthalpies per gas molecule (H b ) are given in kcal/mol. All the distances are in angstroms (Ǻ) unit and aromatic rings of PA[6] are marked numerically. Table S1: Molecular graphs (network of bond paths linking pairs of neighboring nuclei) of four CO 2 adsorbed inside PA[6] (top view for the better clarity). Small red dots indicates bond critical points (3, - 1). 4 CO 2 inside P[6] ρ(r c ) 2 ρ(r c ) V(r c ) G(r c ) a b c d e f
3 k l m n a b j q o c i p f d e h g g h i j k l m n o p q Table S2: Molecular graphs (network of bond paths linking pairs of neighboring nuclei) of four CH 4 adsorbed inside PA[6] (top view for the better clarity). Small red dots indicates critical points. k l 4 CH 4 inside P[6] ρ(r c ) 2 ρ(r c ) V(r c ) G(r c ) a i m j a p h q o n r g b f e d c b c d e f g h i j k l m n o p q r Table S3: Molecular graphs (network of bond paths linking pairs of neighboring nuclei) of twon-butane adsorbed inside PA[6] (top view for the better clarity). Small red dots indicates critical points
![2 n-butane inside P[6] ρ(r c ) 2 ρ(r c ) V(r c ) G(r c ) a 0.00924 0.02959 0.78 m n o p a l b v u t r q s k j c d i h g f e b 0.00268 0.01133 0.67 c 0.00596 0.02204 0.79 d 0.00749 0.02306 0.75 e 0.](/docs-images/94/122022329/images/4-0.jpg "00518 0.02028 0.74 f 0.00518 0.01961 0.70 g 0.00754 0.02340 0.76 h 0.00634 0.02014 0.74 i 0.00679 0.02504 0.82 j 0.00864 0.02723 0.77 k 0.00685 0.02490 0.82 l 0.00847 0.02649 0.77 m 0.00811 0.02846 0.")
4 2 n-butane inside P[6] ρ(r c ) 2 ρ(r c ) V(r c ) G(r c ) a m n o p a l b v u t r q s k j c d i h g f e b c d e f g h i j k l m n o p q r s t u v Outside the PA[6] cavity H=-5.3, H b =-5.3 H=-10.1, H b =-5.1 H=-14.9, H b =-5.0
5 H=-19.6, H b =-4.9 H=-24.4, H b =-4.9 H=-29.3, H b =-4.9 Figure S3: B3LYP-D3/6-31G(d) calculated optimized structures of PA[6] with CO 2 interacting with the outside the cavity of PA[6]. Binding enthalpies ( H) and binding enthalpies per gas molecule(h b ) are given in kcal/mol. Outside the PA[6] cavity H= -1.8, H b = -1.8 H= -3.9, H b = -2.0 H= -5.9, H b = -2.0 H= -7.7, H b = -1.9 H=-9.8, H b = -2.0 H=-12.0, H b = -2.0 Figure S4: B3LYP-D3/6-31G(d) calculated optimized structures of PA[6] with CH 4 interacting with the outside the cavity of PA[6]. Binding enthalpies ( H) and binding enthalpies per gas molecule(h b ) are given in kcal/mol E= -10.1, H= -8.6 E= -12.9, H= -11.3
6 2.8 E= -21.6, H= -18.4, H b = -9.2 E= -26.1, H= -23.1, H b = (-1.7) (-1.7) Figure S5: B3LYP-D3/6-31G(d) calculated optimized structures of PA[6] with C 2 H 6 and C 3 H 8 (top view for the better clarity). Binding electronic energies ( E), binding enthalpies ( H) are given in kcal/mol. All the distances are in angstroms (Ǻ) unit. Table S4: B3LYP-D3/6-31G(d) calculated binding free energies ( G, kcal/mol) for the adsorption of the CO 2, CH 4, ethane, propane and butane with PA[6] No. of guest molecules PA[6] host: 1 ( G) 2 ( G) 3 ( G) 4 ( G) 5 ( G) CO CH C 2 H C 3 H n-c 4 H
7 Table S5: Cartesian coordinates of optimized structures of CO 2, CH 4 and n-butane adsorbed inside the PA[6] host Inside the PA[6] cavity PA[6]+1CO 2 O O O O O O C C C H C C C H C H H C C C H C C C H C H H C C H PA[6]+2CO 2 O O O O O O C C C H C C C H C H H C C C H C C C H C H H C C H
8 C C C H C C H H H H H H H H O O O O O O C C C H C C C H C H H C C C H C C C H C C H H H H H H H H O O O O O O C C C H C C C H C H H C C C H
9 C C C H C H H C C H C C C H C C H H H H H H H H C O O C C C H C H H C C H C C C H C C H H H H H H H H C O O C O O PA[6]+3CO 2 O O O O PA[6]+4CO 2 O O O O
10 O O C C C H C C C H C H H C C C H C C C H C H H C C H C C C H C C H H O O C C C H C C C H C H H C C C H C C C H C H H C C H C C C H C C H H
11 H H H H H H O O O O O O C C C H C C C H C H H C C C H C C C H C H H C H H H H H H O O O O O O C C C H C C C H C H H C C C H C C C H C H H C
12 C H C C C H C C H H H H H H H H C O O C O O C O O C H C C C H C C H H H H H H H H C O O C O O C O O C O O PA[6]+5CO 2 O O O O O O PA[6]+1CH 4 O O O O O O
13 C C C H C C C H C H H C C C H C C C H C H H C C H C C C H C C H H H H C C C H C C C H C H H C C C H C C C H C H H C C H C C C H C C H H H H
14 H H H H O O O O O O C C C H C C C H C H H C C C H C C C H C H H C C H H H H H O O O O O O C C C H C C C H C H H C C C H C C C H C H H C C H
15 C C C H C C H H H H H H H H C O O C O C C C H C C H H H H H H H H C H H H H O C O O C O O C O O PA[6]+2CH 4 O O O O O PA[6]+3CH 4 O O O O O
16 O C C C H C C C H C H H C C C H C C C H C H H C C H C C C H C C H H H O C C C H C C C H C H H C C C H C C C H C H H C C H C C C H C C H H H
17 H H H H H O O O O O O C C C H C C C H C H H C C C H C C C H C H H C C H H H H H O O O O O O C C C H C C C H C H H C C C H C C C H C H H C C
18 H C C C H C C H H H H H H H H C H H H H C H H H H H C C C H C C H H H H H H H H C H H H H C H H H H C H H H H PA[6]+4CH 4 O O O O PA[6]+5CH 4 O O O O
19 O O C C C H C C C H C H H C C C H C C C H C H H C C H C C C H C C H H O O C C C H C C C H C H H C C C H C C C H C H H C C H C C C H C
20 H H H H H H O O O O O O C C C H C C C H C H H C C C H C C C H C H H C C H H H H H H H H O O O O O O C C C H C C C H C H H C C C H C C
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