Facile synthesis of fluorescent polysaccharides: Cytosine grafted agarose and kappa-carrageenan

作者：Oza Mihir D; Meena Ramavatar; Siddhanta A K^*

来源：Carbohydrate Polymers, 2012, 87(3): 1971-1979.

DOI：10.1016/j.carbpol.2011.10.004

• Fluorescent polysaccharides
• Agarose
• kappa-Carrageenan
• Cytosine

New fluorescent polymeric materials were synthesized by grafting the nucleobase cytosine on to the backbone of agarose and kappa-carrageenan. employing a rapid water based method under microwave irradiation using potassium persulphate (KPS) as an initiator. The emission spectrum of the modified agarose and kappa-carrageenan recorded in aqueous solution (5 x 10(-5) M) exhibited emission maxima (lambda(em,max)) at 348 nm by excitation at 266 nm. The emission intensity was enhanced by ca. 104% and 60% compared to that of pure cytosine solution of the same concentration. When the concentration of the pure cytosine solution is made equivalent to the concentration of the cytosine molar component (3.09 x 10(-5)) and (3.5 x 10(-5)) present in 5 x 10(-5) M solution of modified agarose and kappa-carrageenan, respectively, then ca. 143% and 81% enhancement in emission intensity was observed. The remarkable fluorescent activity of the agarose-cytosine derivative may have potential uses as sensor in various applications.

• 出版日期2012-2-14
• 单位海洋化工研究院有限公司