A Self‐Assembled Nanohybrid Composed of Fluorophore–Phenylamine Nanorods and Ag Nanocrystals: Energy Transfer, Wavelength Shift of Fluorescence and TPEF Applications for Live‐Cell Imaging
作者:Lin Kong、Jia‐xiang Yang、Sheng‐li Li、Qiong Zhang、Zhao‐ming Xue、Hong‐ping Zhou、Jie‐ying Wu、Bao‐kang Jin、Yu‐peng Tian
DOI:10.1002/chem.201302874
日期:2013.12.2
A fluorophore–phenylamine derivative (L) has been coupled with silver nanocrystals (NCs) to construct an L–Ag nanohybrid. Owing to synergic effects of the L and Ag components, the exciton–plasmon interactions between L and Ag increase the strength of the donor–acceptor interaction within the nanohybrid, a fact that results in an energy‐transfer process and further brings about a dramatic redshift of
荧光团-苯胺衍生物(L)已与银纳米晶体(NCs)偶联以构建L- Ag纳米杂化物。由于的协同作用大号和Ag部件之间的激发子-等离子体相互作用大号和Ag增加供体-受体相互作用的强度的纳米杂化物内,这一事实导致的能量转移过程,并进一步带来了显着的红移单光子吸收和荧光,以及降低的荧光FL寿命。耦合效应还导致一系列非线性光学特性的增强,包括双光子激发荧光(TPEF),双光子吸收(TPA)横截面(δ),双光子吸收系数(β),非线性折射率(γ)和三阶非线性光学磁化率(χ (3))。纳米杂合体的增强的双光子荧光被证明对于活细胞(如HepG2)的双光子显微镜检查有潜在的用处。此外,细胞毒性测试表明,低微摩尔浓度的纳米杂交体在至少24小时内不会引起细胞活力的显着降低,因此对于进一步的生物学研究应该是安全的。