凯茵化工讯 记者从中国科学技术大学获悉，近期，中国科学技术大学教授崔华、马明明等与南京大学教授王伟合作，模拟萤火虫生物发光，成功制备出一种可高强度和长时间化学发光的水凝胶，陶氏百历摩苯乙烯/丙烯酸聚合物其发光在黑暗中肉眼可见，持续时间达150小时以上。国际权威学术期刊《自然 通讯》日前发表了该成果。

　　目前，大多数化学发光反应都是“闪光”型光发射，发光在短时间内完成，限制了在冷光源、分析化学和生物成像等方面的应用。高强度和长时间的“辉光”型化学发光一直是科学家追求的目标。

　　近期，中科大、南京大学研究团队采用天然的壳聚糖、化学发光试剂和催化剂，制备出一种新型水凝胶。他们研究发现，99.8%的催化剂被固定在水凝胶骨架上，而89.5%的化学发光试剂分散在水凝胶孔洞中。当氧化剂进入水凝胶，被分解产生活性自由基，与化学发光试剂反应产生化学发光。由于催化剂的螯合和异相化作用增强了催化活性和稳定性，水凝胶大大降低氧化剂的扩散速度，从而产生了强而长的化学发光。

Chinese scholars imitate fireflies developed a "bright light" hydrogel

Kailin Chemical News reporter learned from the University of Science and Technology of China, recently, Cui Hua, Ma Mingming, University of Science and Technology of China and Professor Wei Wang of Nanjing University, simulated firefly bioluminescence, the successful preparation of a high strength and Chemiluminescent hydrogels, whose luminescence is visible to the naked eye in darkness for a duration of more than 150 hours, International authoritative academic journal "Nature & Middot; Communications" recently published the results.

At present, most of the chemiluminescence reactions are "flash" type light emission, and the light emission is completed in a short time, which limits the application in cold light sources, analytical chemistry and biological imaging. High intensity and long-term "glow" chemiluminescence has always been the goal pursued by scientists.

Recently, the research group of CUHK and Nanjing University used natural chitosan, chemiluminescence reagents and catalysts to prepare a new type of hydrogel. Their study found that 99.8% of the catalyst was immobilized on the hydrogel backbone while 89.5% of the chemiluminescent reagent was dispersed in the hydrogel pores. When the oxidant enters the hydrogel, it decomposes to produce active radicals that react with the chemiluminescent reagent to produce chemiluminescence. Due to chelation and heterogeneity of the catalyst to enhance the catalytic activity and stability, hydrogels greatly reduce the rate of oxidant diffusion, resulting in strong and long chemiluminescence.