以荧光碳点为载体,3-氨丙基三乙氧基硅烷为功能单体,正硅酸乙酯为交联剂,牛血红蛋白为模板分子,采用溶胶-凝胶法制备出对牛血红蛋白具有高选择性识别性能的新型荧光印迹聚合复合材料(CDs@MIP).采用红外光谱(IR)和扫描电子显微镜(SEM)对聚合物进行表征,结果表明,分子印迹聚合物包覆在荧光碳点表面,印迹因子为4.60.此CDs@MIP对牛血红蛋白具有高选择性,相对于卵清蛋白、牛血清蛋白、人血清蛋白的选择因子分别为4.38、4.73和3.66.在最佳条件下,此CDs@MIP对牛血红蛋白的响应线性范围为0.1～10.0μmol/L,检出限为23.0 nmol/L.将此CDs@MIP用于牛血液样品中牛血红蛋白的测定,回收率为99.0％ ～102.5％.%A novel fluorescent imprinted polymer (CDs@ MIP) with selective recognition of hemoglobin was prepared by the sol-gel method using fluorescent carbon dots as the carrier material, 3-aminopropyltrieth-oxysilane as the functional monomer, tetraethoxysilane as the crosslinking agent and bovine hemoglobin as template molecule. The results of IR and scanning electron microscopy showed that the molecularly imprinted polymer was coated on the surface of fluorescent carbon dots. The CDs@ MIP showed selective recognition properties for bovine hemoglobin with an imprinting factor of 4. 60. Also the adsorption ability and specific recognition performance of CDs@ MIP were investigated, and it was found that the CDs@ MIP had high selectivity toward bovine hemoglobin, and the selection factors for ovalbumin, bovine serum albumin and human serum albumin were 4. 38, 4. 73 and 3. 66, respectively. Under the optimal conditions, the linear range of CDs@ MIP for bovine hemoglobin was 0. 1-10. 0 μmol/ L and the detection limit was 23. 0 nmol/ L. The CDs@ MIP was successfully used for the determination of bovine hemoglobin in bovine blood samples with recoveries of 99. 0％ -102. 5％ .
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