Synthesis and characterization of thiol-stabilized gold nanoparticles appended to bis(pyrazole) pyridine for fabrication of rectangular nano/microstripes and their spin crossover and SERS studies.

We report the synthesis and characterization of thiol-stabilized gold nanoparticles (AuNPs), functionalized with bis(pyrazole)pyridine ligands (L4 and 10), and their subsequent assembly into rectangular nano/microstripes using a lithographically controlled wetting (LCW) technique. The resulting microstructured patterns, with widths of ∼2 μm and heights of 150-200 μm, were employed to simultaneously explore spin crossover (SCO) behavior and surface-enhanced Raman scattering (SERS) properties. Compound 10 exhibited SCO behavior with a molar magnetic susceptibility () of ∼3.