Metal-organic Framework (MOF) Characterization Using MP-SPR

Application  Note #153

Metal-organic framework (MOF) layer-by-layer deposition on a polyethylenimine (PEI) coated gold sensor slide. Eight tannic acid and Fe (III) layers were deposited in situ

Metal-polyphenol complex (MPC) film deposition was monitored in situ using Multi-Parametric Surface Plasmon Resonance (MP-SPR). The sequential deposition of Tannic Acid (TA) and Fe(III) ions was performed up till 8 cycles. Depositions were measured at two wavelengths (670 nm and 785 nm), and thickness and refractive index were determined using LayerSolver™ software. The first three layers were initial layers, forming only about 2 nm MOF layer on the surface. Thickness of all the 8 MOF layers was 21.0 nm and the refractive index was 1.435 (at 670 nm). Fe(III) and TA formed an amorphous MOF layer.

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