4-(Methyl-sulfon-yl)benzaldehyde.

In the crystal of the title compound, C(8)H(8)O(3)S, the mol-ecules are linked into a three-dimensional array by inter-molecular C-H⋯O hydrogen bonds.

(E)-2-Methyl-N-[4-(methyl-sulfon-yl)benzyl-idene]aniline.

Mol-ecules of the title compound, C(15)H(15)NO(2)S, display an E configuration with respect to the C=N double bond. The crystal structure is stabilized by weak C-H⋯O hydrogen bonds. The dihedral angle between the two aromatic ring planes is 50.41 (12)°.

(E,E)-N,N'-Bis[4-(methyl-sulfon-yl)benzyl-idene]ethane-1,2-diamine.

In the crystal structure of the title Schiff base compound, C(18)H(20)N(2)O(4)S(2), the mol-ecule lies across a crystallographic inversion centre. The torsion angle of the N-C-C-N fragment is 180°, as the inversion centre bis-ects the central C-C bond. The crystal packing is stabilized by C-H⋯O hydrogen bonds and aromatic π-π stacking inter-actions with a centroid-centroid distance of 3.913 (2) Å.

2-Amino-4-methyl-benzene-sulfonamide.

In the crystal of the title compound, C(7)H(10)N(2)O(2)S, the mol-ecules are linked by two strong N-H⋯O hydrogen bonds. The mol-ecular structure is stabilized by an intra-molecular N-H⋯O hydrogen bond. The C/S/N plane makes a dihedral angle of 69.7 (2)° with the aromatic ring plane.

Aqueous dye adsorption on ordered mesoporous carbons.

Ordered mesoporous carbons (OMCs) with varying pore size, and microporous carbon, CFY, were synthesized using ordered mesoporous silica SBA-15 and NaY zeolite as hard templates, respectively. N(2) adsorption tests show that the synthesized OMCs possess abundant mesopores and centralized mesopore distribution. Methylene blue (MB) and neutral red (NR) were used as probe molecules to investigate their adsorption behaviors on OMCs and CFY. As evidenced by adsorption tests, the volume of mesopores of which the pore size is larger than 3.5 nm is a crucial factor for the adsorption capacity and adsorption rate of MB on OMCs. However, the most probable pore diameter of OMCs was found to be vital to the adsorption capacity and adsorption rate of NR. Theoretical studies show that the adsorption kinetics of MB and NR on OMCs can be well depicted by using pseudo-second-order kinetic model.