温度/光双重响应性树枝状单体的合成与表征

Synthesis and Characterisation of a Novel Thermo/Light Dual-Responsive Dendritic Monomer

摘要:

通过重氮、还原、取代、醚化、酯化等反应，合成了具有温敏和光敏基团的新型双功能性树枝状单体，采用红外光谱(FTIR)、核磁共振(1HNMR和13CNMR)、质谱(MS)对目标产物进行了表征；并通过紫外可见分光光度计(UV-Vis)对单体水溶液的温敏性和光敏性进行了研究。结果表明：单体水溶液(1 mg/mL)的低临界溶解温度(LCST)为12.5 ℃；紫外光照射后，LCST降低了6.3 ℃，同时，单体水溶液对紫外可见光的吸收具有良好的可逆性。

Abstract:

A novel dual functional dendritic monomer containing thermo-responsive and light-responsive groups was designed and prepared via a multi-step process of the diazotization, reduction, substitution, etherification and esterification reaction. The chemical structure of monomer was confirmed by infrared spectroscopy (FTIR), nuclear magnetic resonance (1HNMR and 13CNMR) and mass spectrometry (MS) techniques. The thermo- and light-responsive behaviors of the monomer in water was investigated by ultraviolet and visible spectrophotometry (UV-Vis). The results showed that the lower critical solution temperature (LCST) of the monomer aqueous solution (1 mg/mL) was 12.5 °C and decreased by 6.3 °C after UV light irradiation, meanwhile, it has a good reversibility to the UV-Vis absorption of monomer aqueous solution.