Study of Interaction of Sodium Carboxymethylcellulose with Cationic Acridine Dyes by Resonance Rayleigh Scattering (CAT#: STEM-ST-0052-YJL)

Introduction

Cellulose is a linear chain polymer of dehydrated β-d-glucopyranosyl units, which are linked together through β-1,4-glycoside linkage. The cellulose diglucose is the basic unit taking control of the conformation. Sodium carboxymethylcellulose is one of the most important water-soluble derivatives. It is used as thickening, suspending and stabilizing agent in various fields such as cosmetics, food, oil production, textile, paper making, building and medicine.
In the near neutral medium, NaCMC exists as a multi-charged anionic polymer species, therefore it has strong hydrophility. However, the skeleton structure of anhydroglucose units has also a strong hydrophobic tendency. As cationic dye AY or AO coexist with NaCMC in a solution, a super molecular complex was formed by the electrostatic attraction between the protonated heteronitrogen with positive charge in acridine ring of the dye and the negative charged oxygen of carboxyl of NaCMC and the hydrophobic interaction of the hydrophobic skeleton of NaCMC with the aryl groups of the dye.