Luminescent Probes for Ultrasensitive Detection of Nucleic Acids
作者:Lev N. Krasnoperov、Salvatore A. E. Marras、Maxim Kozlov、Laura Wirpsza、Arkady Mustaev
DOI:10.1021/bc900403n
日期:2010.2.17
Novel amino-reactive derivatives of lanthanide-based luminescent labels of enhanced brightness and metal retention were synthesized and used for the detection of cDNA oligonucleotides by molecular beacons. Time-resolved acquisition of the luminescent signal that occurs upon hybridization of the probe to the target enabled the avoidance of short-lived background fluorescence, markedly enhancing the sensitivity of detection, which was less than 1 pM. This value is about 50 to 100 times More sensitive than the level achieved with conventional fluorescence-based molecular beacons, and is 10 to 60 times more sensitive than previously reported for other lanthanide-based hybridization probes. These novel luminescent labels should significantly enhance the sensitivity of all type of nucleic acid hybridization probes, and could dramatically improve the detection limit of other biopolymers and small compounds that are used in a variety of biological applications.
A europium-based ‘off-on’ colourimetric detector of singlet oxygen
作者:S.N. Aisyiyah Jenie、Shane M. Hickey、Zhangli Du、Damien Sebben、Douglas A. Brooks、Nicolas H. Voelcker、Sally E. Plush
DOI:10.1016/j.ica.2017.03.043
日期:2017.6
The design, synthesis and characterisation of a luminescent probe based on the 'click' conjugation between a Eu(III) complex and an anthracene moiety, Eu-A, is reported. Eu-A is demonstrated to be able to colourimetrically detect singlet oxygen (O-1(2)) in aqueous media at neutral pH with a clear 'off-on' rapid response time of two minutes. (C) 2017 Published by Elsevier B.V.
Besthorn; Garben, Chemische Berichte, 1900, vol. 33, p. 3447