Energy Transfer of CdSe/ZnS Nanocrystals Encapsulated with Rhodamine-Dye Functionalized Poly(acrylic acid).

Energy Transfer of CdSe/ZnS Nanocrystals Encapsulated with Rhodamine-Dye Functionalized Poly(acrylic acid).
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DOI:
10.1016/j.jphotochem.2012.07.012
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发表时间:
2012-11-15
影响因子:
4.3
通讯作者:
Nocera, Daniel G.
Nocera, Daniel G.
中科院分区:
化学3区
文献类型:
--
作者:
Somers, Rebecca C.;Snee, Preston T.;Bawendi, Moungi G.;Nocera, Daniel G.

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通过官能化的聚丙烯酸(PAA)包覆层,实现了CdSe/ZnS纳米晶(NC)供体和罗丹明异硫氰酸盐(RITC)受体之间的能量转移.用N-辛胺(OA)和5-氨基-1-戊醇(AP)修饰PAA,[PAA-OA-AP],允许同时水增溶和NC的官能化,强调了用这种策略合成NC-受体缀合物的容易性。对NC-RITC构建体的光物理研究表明,能量转移是有效的,kFRET接近108 s-1。分子与具有PAA-OA-AP涂层的NC的共价缀合的容易性,连同有效的能量转移,使得用PAA-OA-AP包封的NC成为感测应用的有吸引力的候选者。
Energy transfer between a CdSe/ZnS nanocrystal (NC) donor and a rhodamine isothiocyanate (RITC) acceptor has been achieved via a functionalized poly(acrylic acid) (PAA) encapsulating layer over the surface of the NC. The modification of PAA with both N-octylamine (OA) and 5-amino-1-pentanol (AP), [PAA-OA-AP], allows for the simultaneous water-solubilization and functionalization of the NCs, underscoring the ease of synthesizing NC-acceptor conjugates with this strategy. Photophysical studies of the NC-RITC constructs showed that energy transfer is efficient, with kFRET approaching 108 s−1. The ease of the covalent conjugation of molecules to NCs with PAA-OA-AP coating, together with efficient energy transfer, makes the NCs encapsulated with PAA-OA-AP attractive candidates for sensing applications.
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