Peng Chuan, Tan Su-Yun, Li Ming-Tian
School of Materials Science and Engineering, Sichuan University of Science and Engineering, 643000 Zigong, Peoples Republic of China.
J Nanosci Nanotechnol. 2020 Apr 1;20(4):2195-2204. doi: 10.1166/jnn.2020.17202.
Iron tetranitro-phthalocyanine was synthesized by the reaction of 4-nitrophthalimide with FeCl₃, and was then modified by -(trimethoxysilyl)propane-1-thiol to prepare functionalized iron phthalocyanine. A graphene oxide/iron phthalocyanine composite was then prepared, comprising functionalized iron phthalocyanine supported on the surface of graphene oxide via covalent bonds. All these complexes were characterized by infrared spectra (IR), X-ray diffraction, ultraviolet/visible (UV/vis) and Raman spectroscopy, and scanning electron microscopy. The catalytic properties of the graphene oxide/iron phthalocyanine composite for catalyzing adrenaline oxidation were evaluated by measuring the absorbance intensity at the characteristic peak of the oxidation product. A fiberoptic adrenaline sensor based on a graphene oxide/iron phthalocyanine composite catalyst and fluorescence quenching was fabricated and studied. The relationship between the concentrations of dissolved oxygen and adrenaline was investigated by measuring the phase delay . The results showed that the graphene oxide/iron phthalocyanine composite can effectively catalyze adrenaline oxidization, and the optimal conditions are pH = 8.0, = 30 °C, and = 4.0 mg/mL; moreover, concentrations of adrenaline can be detected in the range from 1.8×10 to 9.2×10 mol/L with a sensor response time of 4 min.
通过4-硝基邻苯二甲酰亚胺与FeCl₃反应合成四硝基酞菁铁，然后用-(三甲氧基甲硅烷基)丙烷-1-硫醇对其进行改性，制备功能化酞菁铁。接着制备了氧化石墨烯/酞菁铁复合材料，其包含通过共价键负载在氧化石墨烯表面的功能化酞菁铁。所有这些配合物均通过红外光谱(IR)、X射线衍射、紫外/可见(UV/vis)和拉曼光谱以及扫描电子显微镜进行表征。通过测量氧化产物特征峰处的吸光度强度，评估了氧化石墨烯/酞菁铁复合材料催化肾上腺素氧化的催化性能。制备并研究了基于氧化石墨烯/酞菁铁复合催化剂和荧光猝灭的光纤肾上腺素传感器。通过测量相位延迟研究了溶解氧浓度与肾上腺素之间的关系。结果表明，氧化石墨烯/酞菁铁复合材料能有效催化肾上腺素氧化，最佳条件为pH = 8.0、温度 = 30℃、复合材料浓度 = 4.0 mg/mL；此外，使用传感器时，肾上腺素浓度在1.8×10至9.2×10 mol/L范围内可被检测，响应时间为4分钟。
