Synthesis and characterization of metallocarbonyl functionalized gold nanoparticles

We designed and synthesized new organometallic Fe complex for application as IR marker of noble metal nanoparticles. The novel metallocarbonyl succinimide complex possesses a disulfide group, which enables its covalent binding to noble metals. The disulfide metallocarbonyl complex was chemisorbed to gold nanoparticles of different sizes and the properties of the AuNp-metallocarbonyl conjugates were determined on the basis of UV–vis and IR spectroscopy, dynamic light scattering (DLS), transmission electron microscopy (TEM) and inductively-coupled plasma mass spectrometry (ICP-MS). A surface enhanced infrared absorption (SEIRA) effect was observed during IR analysis of the AuNp-metallocarbonyl conjugates by IR transmission spectroscopy.