含乙氧甲酰甲氨基咪唑杯[4]芳烃的合成及其水相体系中对Al3+和Ag+的荧光识别

Synthesis of Calix[4]arene Modified with Ethoxyformyl Aminoimidazole and Recognition Properties for Ag+ and Al3+ in aqueous solution

摘要:

合成并表征了一种含乙氧甲酰甲氨基咪唑杯[4]芳烃荧光化合物；采用紫外吸收光谱和荧光发射光谱，在体积比为3:7的甲醇/水混合溶液 (Tris–HCl 缓冲溶液，pH=6.5) 中研究了5,11,13,17–四叔丁基–26,28–二羟基–25,27–二[2–[4–(N,N–二乙氧酰甲基氨基)苯基–4,5–二苯基–1H–咪唑–1]–丁氧基杯[4]芳烃(M)对常见金属离子的识别性能。结果发现，化合物M以1:1的络合比对Al3+的进行选择性识别，且识别行为不受其他常见金属离子的干扰；在同样条件下，化合物M以1:2的络合比与Ag+络合，当Al3+作为干扰离子且浓度高于Ag+时，对M与Ag+的识别产生干扰。即，当Al3+和Ag+同时存在时，化合物M与Al3+具有更好的识别选择性。与其他杯芳烃衍生物相比，化合物M实现了在水相体系中对Al3+和Ag+的识别效果。

Abstract:

Compound calix[4]arene, namely 5,11,13,17–tertbutyl–26,28–dihydroxy–25,27–di[2–[4– (N,N–diethoxyformyl amino)phenyl–4,5–diphenyl–1H–imidazol–1]–yl–butoxycalix[4]arene (M) modified with ethoxyformyl aminoimidazole was synthesized and characterized as a fluorescent probe. Its recognition properties for metal ions were determined by UV and fluorescent spectra in the CH3OH/H2O (VCH3OH/VH2O = 3/7, Tris–HCl buffer aqueous, pH=6.5). The results indicated that compound M expressed high selectivity and sensitivity for Al3+ (1:1) and Ag+ (1:2) without interruption in the presence of other metal ions. Meanwhile, when Al3+ than Ag+ ions coexisted, the fluorescent intensity between compound M and Al3+ were observed. Compared with other calix[4]arene derivatives, compound M realized the recognition with Al3+ than Ag+ ions in the aqueous solution.