Surface Characterization of a Novel D-π-D Type Ligand by IGC at Infinite Dilution

Abstract

The adsorption properties and acid-base contributions to the surface energy of (E)-N-((E)-3-(4-(dimethylamino)phenyl)allylidene)-4-(4-((E)-((E))-3-(4 (dimethylamino)phenyl)allylidene)amino)-3-methylnaphthalen-1-yl)-2-ethylnaphthalen-1-amine which is a new D-p-D Type Schiff base ligand (L) were determined by inverse gas chromatography (IGC) at infinite dilution. The retentions of several organic solvents on L were measured in the temperature range from 40 to 100°C by IGC. The dispersive component of the surface energy, c D S of studied adsorbent surface was estimated using retention times of different nonpolar organics in the infinite dilution region. Thermodynamic parameters of adsorption (free energy, DG S A ; enthalpy, DH S A and entrophy, DS S A ), dispersive components of the surface energies, c D S and the acid, K A and base, K D constants for the L were calculated. The obtained results proved that IGC is an efficient and successful technique for the characterization of adsorption properties and acid-base quantity of these kinds of materials.

Structural and Surface Characterization of Newly Synthesized D‐π‐D Type Schiff Base Ligand: (1E,2E)‐3‐[4‐(Dimethylamino)phenyl]prop‐2‐en‐1‐ylidene)phenylamine

“…The values of calculated according to the Dorris-Gray and the Fowkes approaches are very close each to other at the studied temperature ranges. Compared to the values with the before published other Schiff base ligand values, the of (E)-N-((E)-3-(4-(dimethylamino)phenyl)allylidene)-4-(4-((E)-((E))-3-(4(dimethylamino)phenyl)allylidene) amino) -3-methylnaphthalen-1-yl)-2-ethylnaphthalen-1-amine as determined as 33.93 (mJ/m 2 ) at 303 K according to the Dorris-Gray approach [7]. The values are different due to chemical nature difference between the two ligands.…”

“…For example, they are industrially used as dyes and pigments in textile besides their application in pharmacology for the synthesis of antibiotics, antiallergic, and antitumor substances. The Schiff bases can also exhibit thermochromic and photochromic properties [5][6][7]. Moreover, the Schiff base compounds have been regarded as excellent fluorescent materials because of their ability to achieve high thermal stability as well as high photoluminescent efficiency.…”