Details

Autor(en) / Beteiligte

• Liao, Fang
• Song, Xun
• Yang, Siwei
• Hu, Chenyao
• He, Lin
• Yan, Shuai
• Ding, Guqiao

Titel

Photoinduced electron transfer of poly(o-phenylenediamine)–Rhodamine B copolymer dots: application in ultrasensitive detection of nitrite in vivo

Ist Teil von

• Journal of materials chemistry. A, Materials for energy and sustainability, 2015-01, Vol.3 (14), p.7568-7574

Erscheinungsjahr

2015

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We demonstrate a new semiconducting polymer dot: the poly( o -phenylenediamine)–Rhodamine B copolymer dot (Pp–RhB dot), which emits in the red wavelength range. The Pp–RhB dots can be used as an ultrasensitive fluorescence probe for NO 2 − in vivo and show high selectivity and ultrasensitivity (detection limit: 2.0 × 10 −11 M) for NO 2 − . The fluorescence of Pp–RhB dots is decreased ( φ = 0.014) as a result of fast photoinduced electron transfer (PET) between the modulator (poly( o -phenylenediamine)) and the transducer (RhB), but the N–NO 2 bonding mode prevents PET, causing the fluorescence emission to be enhanced ( φ = 0.92). This probe effectively avoids the influence of auto-fluorescence in biological systems and gave positive results when tested in both aqueous solution and living cells.