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用水溶性四苯基乙烯基荧光探针检测ctDNA

DOI: 10.3724/SP.J.1105.2011.11116, PP. 1079-1085

Keywords: DNA检测,聚集诱导发光,四苯基乙烯,荧光探针

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Abstract:

设计合成了一种水溶性的四苯基乙烯(TPE)衍生物TPEDPyMe,研究了该化合物的吸收和发射特性,发现TPEDPyMe具有聚集诱导发光(AIE)性能.在pH值为7.2的三羟甲基氨基甲烷-盐酸(tris-HCl)缓冲溶液中用TPEDPyMe检测小牛胸腺DNA(ctDNA)时观察到,随着ctDNA的浓度从0μg/mL增大到500μg/mL,TPEDPyMe的荧光强度逐渐增大20倍,且荧光峰位从627nm蓝移到576nm.荧光强度与ctDNA浓度变化的线性相关区间为0μg/mL到50μg/mL,此区间内Ksv常数达到了1.4×102.

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