Novel Ce(III)-Metal Organic Framework with a Luminescent Property To Fabricate an Electrochemiluminescence Immunosensor.

Abstract

We designed a novel luminescent metal-organic framework (MOF) named Ce-TCPP-LMOF (CTM) through a simple one-pot solvothermal method. CTM was synthesized by using the emerging electrochemiluminescent (ECL) material (4,4',4″,4‴-(porphine-5,10,15,20-tetrayl)tetrakis(benzoic acid) as the organic ligand and Ce(III) as the metal node. We found that CTM not only has the remarkable ability to emit light but also has a uniform "sandwich biscuit" shape and suitable nanoscale size, which are promising for further applications. We also applied CTM to construct a novel ECL immunosensor and achieve sensitive detection of the proprotein convertase subtilisin/kexin type 9 (PCSK9), a biomarker related to cardiovascular diseases. To further amplify the ECL signal of CTM, a novel dual-amplified signal strategy was established by inducing a polyamidoamine dendrimer (PAMAM) and gold nanoparticles (AuNPs). Importantly, we first proved that the ECL signal of the CTM/S2O82- system could be enhanced by the PAMAM electric field. As the electron transfer rate was accelerated by the AuNP layer, this ECL signal was further enhanced in AuNP-modified electrodes. The ECL immunosensor showed desirable performance for PCSK9 analysis within a detection range of 50 fg mL-1 to 10 ng mL-1 and a low limit of detection of 19.12 ± 2.69 fg mL-1. Real sample detection suggested that the immunosensor holds great potential for analyzing clinical serum samples.

• Authors: Yuan Zhou, Junlin He, Chengli Zhang, Jia Li, Xiaoxue Fu, Weiran Mao, Wenming Li, Chao Yu
• Journal: ACS applied materials & interfaces (ACS Appl Mater Interfaces) Vol. 12 Issue 1 Pg. 338-346 (Jan 08 2020) ISSN: 1944-8252 [Electronic] United States
• PMID: 31794188 (Publication Type: Journal Article)

Chemical References

• Dendrimers
• Metal-Organic Frameworks
• Poly(amidoamine)
• Polyamines
• PCSK9 protein, human
• Proprotein Convertase 9

Topics

• Biosensing Techniques (methods)
• Dendrimers (chemistry)
• Electrochemical Techniques (methods)
• Immunoassay (methods)
• Luminescence
• Luminescent Measurements (methods)
• Metal-Organic Frameworks (chemistry)
• Microscopy, Electron, Scanning
• Polyamines (chemistry)
• Proprotein Convertase 9 (chemistry)