摘要
The synthesis of the novel host compound carrying two spirobenzopyran groups was described.Its structure was confirmed by（）1H NMR,IR and elemental analysis.It was shown that the novel host can recognize lanthanide ions selectively with significant spectral shifts in visible region and enhanced absorbance.Thus,the compound can be used to recognize lanthanide ions by naked eyes. The selectivity was relative to size-fit effect.The order of spectral changes was Yb3+>Er3+>Gd3+>Dy3+>Eu3+>Pr3+>La3+,which is opposite to the order of the radii of lanthanide ions.We discussed the possible binding mechanism with analyzing the different UV-Vis spectral changes resulted by addition of the investigated ions.
The synthesis of the novel host compound carrying two spirobenzopyran groups was described. Its structure was confirmed by ^1H NMR, IR and elemental analysis. It was shown that the novel host can recognize lanthanide ions selectively with significant spectral shifts in visible region and enhanced absorbance. Thus, the compound can be used to recognize lanthanide ions by naked eyes. The selectivity was relative to size-fit effect. The order of spectral changes was Yb^3＋ 〉 Er^3＋ 〉 Gd^3＋ 〉 Dy^3＋ 〉 Eu^3＋ 〉 Pr^3＋ 〉 La^3＋ , which is opposite to the order of the radii of lanthanide ions. We discussed the possible binding mechanism with analyzing the different UV-Vis spectral changes resulted by addition of the investigated ions.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第5期888-890,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20275042)资助
关键词
螺吡哺
杯芳烃衍生物
金属离子
识别
Spirobenzopyrans
Calixarene derivatives
Metal ion
Recognition.
