Journal
ANALYST
Volume 138, Issue 5, Pages 1558-1563Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2an36291k
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Funding
- Turkey National Boron Research Institute (BOREN) [2008.C0155]
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Quartz crystal microbalance (QCM) sensors coated with molecularly imprinted polymers (MIP) have been developed for the recognition of immunoglobulin M (IgM) and mannose. In this method, methacryloylamidophenylboronic acid (MAPBA) was used as a monomer and mannose was used as a template. For this purpose, initially, QCM electrodes were modified with 2-propene-1-thiol to form mannose-binding regions on the QCM sensor surface. In the second step, the methacryloylamidophenylboronic acid-mannose [MAPBA-mannose], pre-organized monomer system, was prepared using the MAPBA monomer. Then, a molecularly imprinted film was coated on to the QCM electrode surface under UV light using ethylene glycol dimethacrylate (EDMA), and azobisisobutyronitrile (AIBN) as a cross-linking agent and an initiator, respectively. The mannose can be simultaneously bound to MAPBA and fitted into the shape-selective cavities. The binding affinity of the mannose-imprinted sensors was investigated using the Langmuir isotherm. The mannose-imprinted QCM electrodes have shown homogeneous binding sites for mannose (K-a: 3.3 x 10(4) M-1) and heterogeneous binding sites for IgM (K-a1: 1.0 x 10(4) M-1; K-a2: 3.3 x 10(3) M-1).
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