双光子敏化Eu3高效发光活细胞成像纳米生物探针
外文标题：Nanoprobes with Enhanced Two-Photon-Sensitized Eu3+ Luminescence Properties for Live Cell Imaging
文献类型：期刊
作者：符小艺[1]
机构：北京分子科学国家实验室,分子动态与稳态国家重点实验室,北京大学化学与分子工程学院,北京100871;华南理工大学材料科学与工程学院,广州510640;中国人民大学化学系,北京100872
通讯作者：Wang, Y (reprint author), Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Coll Chem & Mol Engn, Beijing 100871, Peoples R China.
年：2012
期刊名称：物理化学学报影响因子和分区
卷：28
期：10
页码范围：2480-2486
增刊：增刊
学科：物理化学
收录情况：SCI(E)(WOS:000310181300030)
所属部门：化学系
语言：中文
ISSN：1000-6818
链接地址：http://d.g.wanfangdata.com.cn/Periodical_wlhxxb201210031.aspx
DOI：10.3866/PKU.WHXB201208161
人气指数：260
浏览次数：260
基金：supported by the National Natural Science Foundation of China; National Key Basic Research Special Foundation of China
关键词：Luminescence Europium complex Two-photon excitation Bio-nanoprobe Cel Imaging
摘要：Luminescent nanospheres (EuPHS, dav=45 nm) containing 40%(w) of Eu(tta)3dpbt (tta=thenoyltrifluoroacetonato;dpbt=2-(N,N-diethylanilin-4-yl)-4,6-bis(3,5-dimethylpyrazol-1-yl)-1,3,5-triazine) were prepared by encapsulating Eu(tta)3dpbt in a hybrid matrix formed in situ from poly(styrene-co-methyl methacrylate), octyltrimethoxysilane, and poly(octylsiloxane). The EuPHS are promising luminescent markers for bioanalysis because of their good dispersibility in aqueous solutions, high photostability, l ...More
Luminescent nanospheres (EuPHS, dav=45 nm) containing 40%(w) of Eu(tta)3dpbt (tta=thenoyltrifluoroacetonato;dpbt=2-(N,N-diethylanilin-4-yl)-4,6-bis(3,5-dimethylpyrazol-1-yl)-1,3,5-triazine) were prepared by encapsulating Eu(tta)3dpbt in a hybrid matrix formed in situ from poly(styrene-co-methyl methacrylate), octyltrimethoxysilane, and poly(octylsiloxane). The EuPHS are promising luminescent markers for bioanalysis because of their good dispersibility in aqueous solutions, high photostability, low cytotoxicity, and bright Eu3+luminescence under excitation at long wavelengths. EuPHS exhibited excel ent visible light-sensitized and near-infrared two-photon-sensitized Eu3+ luminescence properties, with a visible-light excitation peak at 415 nm and an excitation window extending up to 475 nm. The quantum yield for Eu3+ luminescence was 0.31(λex=415 nm, T=23°C), and the two-photon excitation (TPE) action cross section was 5.0×105 GM (1 GM=10-50 cm4·s·photon-1·particle-1) at 830 nm. Bionanoprobes prepared by adsorbing transferrin on the surfaces of EuPHS were successful y applied in target-specific labeling and two-photon-excitation imaging of live HeLa cel s. ...Hide
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