title: Coordination polymer nanobelts for nucleic acid detection.
abstract: Herein, coordination polymer nanobelts (CPNBs) were prepared rapidly and on a large scale, by directly mixing aqueous AgNO(3) solution and an ethanol solution of 4, 4'-bipyridine at room temperature. The application of such CPNBs as a fluorescent sensing platform for nucleic acid detection was further explored. CPNB is a π-rich structure, the strong π-π stacking interactions between unpaired DNA bases and CPNB leads to adsorption of fluorescently labeled single-stranded DNA (ssDNA) accompanied by 66% fluorescence quenching. However, the presence of target ssDNA will hybridize with the probe. The resultant helix cannot be adsorbed by CPNB due to its rigid conformation and the absence of unpaired DNA bases. Thus, a significant fluorescence enhancement, 73% fluorescence recovery, was observed in DNA detection as long as the target exists. The present system has excellent sensitivity; a substantial fluorescence enhancement was observed when the concentration of the target was as low as 5 nM. It also exhibits outstanding discrimination ability down to a single-base mismatch.
authors: Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, School of Chemistry and Chemical Industry, China West Normal University, Nanchong, Sichuan, People's Republic of China.
authors: Yonglan
authors: Y
authors: Luo
authors: Fang
authors: F
authors: Liao
authors: Wenbo
authors: W
authors: Lu
authors: Guohui
authors: G
authors: Chang
authors: Xuping
authors: X
authors: Sun
mesh_terms: D004277:DNA, Single-Stranded / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry; D008855:Microscopy, Electron, Scanning / Q000379:methods; D046529:Microscopy, Electron, Transmission / Q000379:methods; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D009693:Nucleic Acid Hybridization; D009696:Nucleic Acids / Q000032:analysis; D009841:Oligonucleotides / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D011725:Pyridines / Q000494:pharmacology; D012835:Silver Nitrate / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods; D013997:Time Factors
chemical_list: D004277:DNA, Single-Stranded; D005456:Fluorescent Dyes; D009696:Nucleic Acids; D009841:Oligonucleotides; D011108:Polymers; D011725:Pyridines; D012835:Silver Nitrate; C034306:4,4'-bipyridyl