Iridium Complex And Its Application To Explore Things Nanomaterials

Phosphorescent iridium complexes have attracted more and more attention dueto their excellent photophysical and photochemical properties, such as high quantumefficiency, long life time and easy to adjust the emission wavelength. As theadvantages they have, phosphprescent iridium have been applied in many fields suchas, biological imaging, chemical sensors, optical function nanomaterials and so on. Inthis thesis, three types of iridium nanoparticles were synthesized and applied inphosphorescent cell marker, magnetic resonance imaging (MRI) and nanomaterials,including the work of the following three parts:1. Coordination cross-linking polymeric nanoparticles: a versatile platform forphosphorescent bioimaging in vitro and in vivoIn this part, we prepared polymeric nanoparticles by one step chemicalcross-liking reaction to develop a new type of phosphorescent probes. On the basisof the cytotoxicity evaluation, we explored its preliminary applicationphosphorescence imaging and living cells lymphatic imaging in vivo.2. Preliminary study of the structure and property of guest induced iridiumcomplexes nanoparticlesPhosphorescent nanospheres of a carboxyl-functionalized iridium complex wereprepared by a conventional precipitation method. The nanowire and nanospherewere synthesised by adding Tib into different concentration iridium complex1solution. Driven by hydrogen bond, these nanospheres transformed into1-dimensional nanowires at the concentration of the iridium complex higher than4.8mM, while nanowires change back to nanospheres with the diameter obviouslysmaller than that of the sole complex of [Ir(ppy)2(Hdcbpy)]. The interaction betweencarboxylic groups and tris(imidazoline) molecules was confirmed by FT-IR spectra.The structures of the nanowires and nanospheres were further studied by XRDdiffraction analysis. With the morphological transformationfrom nanospheres tonanowires, the phosphorescence of nanostructureswas blue shifted.