首页|室温驱动腐植酸钠基碳纳米簇用于荧光比色检测银离子和温度传感

室温驱动腐植酸钠基碳纳米簇用于荧光比色检测银离子和温度传感

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  • 国家科技期刊平台
  • NETL
  • NSTL
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基于氢键结合自组装策略,以富含羟基的高生物相容性煤源腐植酸钠大分子和抗坏血酸为原料,通过绿色经济的室温方法构建了一种低毒水溶性青色荧光碳纳米簇(HAN-CNCs).研究发现,在pH=5.0 条件下,Ag+可与HAN-CNCs表面的C=N/C=O基团配位结合,从而诱导HAN-CNCs发生荧光静态猝灭,实现对Ag+较宽线性范围(5.0～300 μmol/L)和较低检出限(27.5 nmol/L)的特异灵敏检测.进一步观察发现,Ag+与HAN-CNCs相互作用后,HAN-CNCs在日光灯下由淡黄色变为灰蓝色,在紫外灯下由青色荧光变为蓝紫色,基于此,将HAN-CNCs制作成便携式纸基传感器,通过手机分析测试条颜色的G/B值,实现了Ag+的视觉比色荧光检测.此外,HAN-CNCs在20～85℃范围内表现出优异的可逆热响应性能,有望作为一种温度传感器.荧光显微镜成像测试发现,HAN-CNCs在选择性检测活细胞中的Ag+时表现出低生物毒性和优异的细胞渗透性,表明该传感系统可应用于评估人体潜在风险和健康安全.
Room Temperature Driven Sodium Humate-protected Carbon Nanoclusters for Fluorescent and Colorimetric Sensing of Ag+and Temperature
Based on hydrogen bonding self-assembly strategy,hypotoxicity and water-soluble cyan fluorescent carbon nanoclusters(HAN-CNCs)were constructed to employ a highly-efficient green economy and room temperature synthesis method,which used ascorbic acid and high biocompatibility coal-based sodium humate with abundant hydroxy as raw materials.The as-prepared HAN-CNCs can be specifically quenched by Ag+at pH of 5.0,with a wide detection range(5.0-300 μmol/L)and a low detection limit of 27.5 nmol/L.It was found that Ag+can induce fluorescence static quenching of the HAN-CNCs,owing to the coordination interaction between Ag+and amine groups or carbonyl groups on the surface of HAN-CNCs.More interestingly,the colorimetric detection of Ag+could be additionally realized by visible color conversion(yellowish-rubricans)under the daylight lamp and the cyan fluorescence gradually changed to blue purple under the irradiation of an ultraviolet lamp.From this,the HAN-CNCs were employed in the fabrication portable test strip for colorimetry monitoring of Ag+via the green-blue(G/B)analysis.In addition,HAN-CNCs exhibit an excellent reversible thermal response in the range of 20-85℃and have potential as a temperature sensor.Furthermore,the HAN-CNCs exhibited a low biotoxicity and an excellent cell permeability when selectively detecting Ag+in living cells by fluorescence microscopy imaging,indicating that the sensing system can be effectively applied to assessing potential risks and health security.

Coal-based sodium humateCarbon nanoclusterRoom temperature drivenColorimetric fluorescence detection of Ag+Temperature sensing

李林、马静、许畅琳、陈彤瑶、郭衡瑶、李紫悠、武文鑫

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太原师范学院化学与材料学院,晋中 030619

山西省腐植酸工程技术研究中心,晋中 036019

山西省蛋白质基功能材料实验室,晋中 036019

煤基腐植酸钠 碳纳米簇 室温驱动 银离子比色荧光检测 温度传感

山西省基础研究计划山西省科技创新平台研究基金山西省高等学校教学改革项目

202203021221216410220367J20220930

2024

10.7503/cjcu20230510

高等学校化学学报
中华人民共和国教育部委托 吉林大学和南开大学

高等学校化学学报

CSTPCD北大核心
影响因子：1.067
ISSN：0251-0790
年,卷(期)：2024.45(6)
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