【作者】 陈子晗； 韩欣悦； 施国跃； 张闽；

【Author】 Zi-Han Chen;Xin-Yue Han;Guoyue Shi;Min Zhang;School of Chemistry and Molecular Engineering, East China Normal University;

【机构】 华东师范大学化学与分子工程学院；

【摘要】 本工作中我们使用简便的冷凝-回流法一步制备了聚乙烯亚胺修饰的碳点(PEI-CDs),短时间内在较低温度下即可得到分散均一、粒径小的蓝色荧光碳点。由于碳点表面修饰聚乙烯亚胺富含胺基,PEI-CDs可被用于铜离子的荧光传感分析。进一步,由于硫离子与铜离子的强键合作用,该PEI-CDs可以扩展到对硫化氢分子的生物传感。在此过程中,基于荧光"On/Off/On"的变化情况,该体系可被设计为一种抑制型分子逻辑门。更多还原

【Abstract】 In this work,we present a novel facile strategy for green synthesis of polyethyleneimine（PEI）-capped carbon dots （PEI-CDs）,in which citric acid and PEI were chose as reactants and highly fluorescent PEI-CDs could be readily obtained via a simple one-pot refluxing under 120°C within 2 hours.Fluorescence studies indicate that the as-prepared PEI-CDs exhibit strong fluorescence emission at 446 nm with excitation at 365 nm.Upon the sequential addition of Cu²⁺and H₂S,PEI-CDs result in an interesting"ON-OFF-ON"three-state emission responses,promising a bifunctional sensory platform.Moreover,the Cu²⁺/H₂S-facilated reversible fluorescence changes of PEI-CDs has been demonstrated the design of a INHIBIT logic system based on Boolean logic.更多还原