Synthesis, Solvatochromism, Antibacterial Activity and Dyeing Performance of Tricyanofuran‐Hydrazone Analogues

Abstract

Abstract Four novel tricyanofuran disperse dyestuffs 3a‐d bearing hydrazone moiety were synthesized in order to investigate their possible antibacterial activity. The hydrazone moiety was introduced via azo‐coupling of the tricyanofuran with the appropriately functionalized diazonium salt. The optical properties of these compounds showed interesting solvatochromic properties. The absorption peaks are observed in the wavelength range 454–513 nm. It can also be seen that they display different maximum emissions in the wavelength range 528–615 nm. The functional groups attached to the hydrazone moiety influenced both on absorption and emission maxima. The prepared hydrazone‐based disperse dyes were applied for dyeing polyester fabrics, affording satisfactory results. Furthermore, compounds 3a and 3c demonstrated a relatively strong antibacterial activity against some selected gram positive Staphylococcus aureus and Bacillus subtilis ; and gram negative Escherichia coli and Pseudomonas aeuroginosa employing Ampicillin as standard drug.