Facile synthesis of a new fluorogenic metal scavenging interpolymeric diamide based on cellulose and alginic acids

• Synthesis of water soluble fluorogenic, interpolymeric and diamide of polyglucuronic acid of cellulose and alginic acid.
• Polyglucuronic acid and alginic acid were coupled using ethylenediamine as a cross linker.
• The interpolymeric amide exhibited fluorogenic and metal ion scavenging properties.

A microwave assisted synthesis of a water soluble fluorogenic interpolymeric diamide has been described involving alginic acid and polyglucuronic acid (PGA) amide of ethylenediamine (EDA), through a monoamide of PGA and EDA, in good yields (>80 wt % in each step). PGA was prepared by TEMPO (2,2,6,6-tetramethyl piperidine-1-oxyl radical) mediated oxidation of cellulose of the halophytic plant Salicornia brachiata. The amides were characterized by spectral analyses. The fluorescence emission of the PGA amide was 7-fold greater than that of the interpolymeric diamide. PGA monoamide exhibited superior heavy metal ions [Pb(II) and Hg(II)] uptake properties to the diamide, the former showing optimum adsorptions of ions 398.8 and 282.8 mg/g, respectively. These materials may be of utility as potential sensors harnessing their fluorogenic and metal scavenging properties.

A facile synthesis of interpolymeric, fluorogenic, and metal scavenging diamide of polyglucuronic acid of cellulose and alginic acid using ethylenediamine has been described.Figure optionsDownload as PowerPoint slide