摘要
Sensitized near-infrared fluorescence from Yb（Ⅲ）-Calcein complex in methanol solution was studied.It was found that Calcein form 2∶1 complex with Yb（Ⅲ）in a pH 8.9 buffer solution.The visible fluorescence from Calcein was quenched when complex forms,while the near-infrared fluorescence from Yb（Ⅲ） was greatly sensitized.Near-infrared fluorescence of Yb（Ⅲ）was further enhanced when second ligand,such as tributyl phosphate（TBP）,1,10-Phenanthroline（phen）and trioctyl phosphine oxide（TOPO）,was added.It was also noted that the near-infrared fluorescence from Yb（Ⅲ）could also be enhanced by addition of small amount of Er3+ ions.
Sensitized near-infrared fluorescence from Yb(Ⅲ)-Calcein complex in methanol solution was studied.It was found that Calcein form 2∶1 complex with Yb(Ⅲ)in a pH 8.9 buffer solution.The visible fluorescence from Calcein was quenched when complex forms,while the near-infrared fluorescence from Yb(Ⅲ) was greatly sensitized.Near-infrared fluorescence of Yb(Ⅲ)was further enhanced when second ligand,such as tributyl phosphate(TBP),1,10-Phenanthroline(phen)and trioctyl phosphine oxide(TOPO),was added.It was also noted that the near-infrared fluorescence from Yb(Ⅲ)could also be enhanced by addition of small amount of Er^(3+) ions.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2004年第1期63-65,共3页
Chemical Research and Application
基金
广东省自然科学基金资助项目(010380)
