41 research outputs found
Infrared spectroscopic investigations on the metallation of terminal alkynes by Zn(OTf)(2)
An IR study of terminal acetylenes and Zn(OTf)(2) in the presence of amine bases provides evidence that is consistent with the generation of Zn-acetylides
Iridium metal complexes as an unambiguous probe of intramolecular vibrational redistribution
Ultrafast luminescence spectroscopy has been undertaken on three iridium cored phosphorescent complexes, with the Ir(ppy)3 molecule being compared with two Ir(ppy)3 cored dendrimers. Energy dissipation by intramolecular vibrational redistribution (IVR) and cooling shows as a luminescence decay because it decreases the admixture of singlet character to the emitting triplet state. A larger amount of vibrational energy dissipates by IVR in dendrimer complexes. We have therefore found a methodology of obtaining unambiguous information on the IVR process and show its potential to study IVR rates as a function of vibrational energy