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- W2057248013 abstract "Herein, a new conjugated poly(pyridinium salt), poly{(4,4′-(1,4-phenylene)bis(2,6-diphenylpyridinium))-co-N-butyl-3,6-carbazolylene ditosylate} (Poly1), exhibits aggregation-induced emission (AIE) characteristics. It is weakly emissive in solution but highly luminescent in the aggregate state. A fluorescence turn-on biosensor for calf thymus DNA (ctDNA) detection and quantification is developed by taking advantage of complexation-induced aggregation of Poly1, which increases the polymer fluorescence in aqueous solution. It was found that the fluorescence intensity of Poly1 in ethanol–phosphate buffer solution (2 mM, pH 7.4) (v/v 1 : 1) was increased up to about 2.4 folds when the concentration of ctDNA increased from 0 to 95 μM along with the blue-shift of the emission peak from 604 to 586 nm. In the concentration range from 0 to 60 μM, the ratio of the increase in photoluminescent intensity at 604 nm in the presence of ctDNA (IctDNA – I0) to that in the absence of ctDNA (I0) is linearly proportional to the concentration of ctDNA with a correlation coefficient of 0.997. The detection limit was calculated to be of 1.2 μM based on the results of fluorescence titration." @default.
- W2057248013 created "2016-06-24" @default.
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- W2057248013 date "2013-01-01" @default.
- W2057248013 modified "2023-09-26" @default.
- W2057248013 title "Fluorescence turn-on detection of DNA based on the aggregation-induced emission of conjugated poly(pyridinium salt)s" @default.
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- W2057248013 doi "https://doi.org/10.1039/c3py00350g" @default.
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