【摘 要】
：
Porous organic frameworks (POFs) are excellently stable porous materials,which can be employed as host platforms to support metal nanoparticles as functional composites for various applications.Herein,a novel POF is successfully prepared via Friedel-Craft
【机 构】
：
Tianjin Key Laboratory of Structure and Performance for Functional Molecules,College of Chemistry,Ti
论文部分内容阅读
Porous organic frameworks (POFs) are excellently stable porous materials,which can be employed as host platforms to support metal nanoparticles as functional composites for various applications.Herein,a novel POF is successfully prepared via Friedel-Crafts reaction.Silver nanoparticles (Ag NPs) are embedded in the prepared POF to generate an Ag@POF composite,which not only possesses high surface area,outstanding physicochemical stability and outstretched π-conjugation skeleton,but also exhibits preferable electrochemical stability and conductivity.This composite is able to immobilize a mass of aptamer strands to fabricate an intriguing electrochemical aptasensor.Electrochemical impedance spectroscopy (EIS) is a commonly used technology to analyze the electrochemical signal variation.The Ag@POF-based biosensor shows the excellent electrochemical detection behavior through analyzing EIS.For instance theophylline as a research mode,the Ag@POF based electrochemical aptasensor reveals ultra-sensitiveness,high selectivity,remarkable stability,good repeatability and simple operability even in various real samples.Notably,this aptasensor has the sensitive detection performance with the limit of detection of 0.191 pg/mL (1.06 pmol/L) in a wide concentration range of 5.0 × 10-4-5.0 ng/mL(2.78 × 10-3-27.8 nmol/L).
其他文献
As a novel wastewater treatment strategy,the intimate coupling of photocatalysis and biodegradation(ICPB) has been attracted attention,which is ascribed to its combination of the advantages of photocatalytic reactions and biological treatment.The selectio
The aerobic,selective oxidation of hydrocarbons via C—H bond activation is still a challenge.This work shows the achievement of the room temperature visible light driven photocatalytic activation of benzylic C—H bonds with N-hydroxysuccinimide over BiOBrx
Gold nanoparticles (Au NPs) are nanoscale sources of light and electrons,which are highly relevant for their extensive applications in the field of photocatalysis.Although a number of research works have been carried out on chemical reactions accelerated
Gastric ulcers are one of the most common stomach diseases that often accompanied by inflammation,congestion,edema,scar tissue formation,and pyloric obstruction.Fiberoptic endoscopy and X-ray analysis of the upper GI tract have become the diagnostic proce
A series of probes KJ-x (x =1-3) with carbon chains of different lengths based on the matrix ofrhodamine B were engineered to detect Ag+ in aqueous solution in this work.Among them,KJ-1 is selected as the best option after in vitro investigation in view o
Substituent effect of metal porphyrin molecular catalysts plays a crucial role in determining the catalytic activity of oxygen electrocatalysis.Herein,substituent position effect of Co porphyrins on oxygen electrocatalysis,including the oxygen reduction r
All-inorganic perovskite quantum dots (QDs) have attracted great interests due to its outstanding properties.But their poor stability in polar solvents seriously hampered wide applications in analytical chemistry.In this work,strong,stable and flexibly re
More and more attentions have been focused on design and synthesis of novel metal-organic framework/graphene oxide (MOF/GO) composites with unique performance.Zirconium-porphyrin MOF (PCN-222) is in-situ synthesis with the existence of GO with-COOH group
Codelivery of drugs by drug carriers is a promising strategy against several diseases such as infections and cancer.However,traditional drug carriers are typically characterized by low drug payload,limiting their treatment efficacy.Using nanocrystals of i
In this work,a novel blue-green fluorescence phosphorous oxide quantum dots (PO QDs) was synthesized by solvothermal method in N-methyl-2-pyrrolidone (NMP) solution without any protection treatment during synthesis.Upon excitation at 400 nm,PO QDs emitted