Bipyrene-Functionalized Graphene as a “Turn-On” Fluorescence Sensor for Manganese(II) Ions in Living cells
2013
Mao, Xiaowei | Su, Haiyan | Tian, Demei | Li, Haibing | Yang, Ronghua
1,2-bis-(2-pyren-1-ylmethylamino-ethoxy) ethane (NPEY) was synthesized and brought to the surface of graphene nanosheets (GNs) via π–π stacking, which provided a simple and convenient route for processing “turn-on” fluorescent sensor by simply mixing the diluted aqueous solutions of both components. The synthesized NPEY modified graphene nanosheets (NPEY-GNs) not only allows good selectivity toward Mn²⁺ with the detection limit of 4.6 × 10–⁵ M, but also shows “turn-on” response for Mn²⁺ both in vitro and in living cells. These sensing capabilities of NPEY-GNs in living cells make it a robust candidate for many biological fields, such as intracellular tracking, intracellular imaging, etc.
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