HPLC of Formula: 98-98-6In 2020 ,《Spectroscopic and Theoretical Investigation of Color Tuning in Deep-Red Luminescent Iridium(III) Complexes》 was published in Inorganic Chemistry. The article was written by Stonelake, Thomas M.; Phillips, Kaitlin A.; Otaif, Haleema Y.; Edwardson, Zachary C.; Horton, Peter N.; Coles, Simon J.; Beames, Joseph M.; Pope, Simon J. A.. The article contains the following contents:
A series of heteroleptic, neutral iridium(III) complexes of the form [Ir(L)2(N^O)] (where L = cyclometalated 2,3-disubstituted quinoxaline and N^O = ancillary picolinate or pyrazinoate) are described in terms of their synthesis and spectroscopic properties, with supporting computational analyses providing addnl. insight into the electronic properties. The 10 [Ir(L)2(N^O)] complexes were characterized using a range of anal. techniques (including 1H, 13C, and 19F NMR and IR spectroscopies and mass spectrometry). One of the examples was structurally characterized using X-ray diffraction. The redox properties were determined using cyclic voltammetry, and the electronic properties were investigated using UV-vis, time-resolved luminescence, and transient absorption spectroscopies. The complexes are phosphorescent in the red region of the visible spectrum (λem = 633-680 nm), with lifetimes typically of hundreds of nanoseconds and quantum yields ca. 5% in aerated chloroform. A combination of spectroscopic and computational analyses suggests that the long-wavelength absorption and emission properties of these complexes are strongly characterized by a combination of spin-forbidden metal-to-ligand charge-transfer and quinoxaline-centered transitions. The emission wavelength in these complexes can thus be controlled in two ways: first, substitution of the cyclometalating quinoxaline ligand can perturb both the HOMO and LUMO levels (Cl atoms on the ligand induce the largest bathochromic shift), and second, the choice of the ancillary ligand can influence the HOMO energy (pyrazinoate stabilizes the HOMO, inducing hypsochromic shifts). Heteroleptic neutral iridium(III) complexes [Ir(L)2(N^O)] (where N^O = picolinate or pyrazinoate) that incorporate cyclometalated quinoxaline ligands demonstrate tunable emission in the red region of the visible spectrum. In the experiment, the researchers used Picolinic acid(cas: 98-98-6HPLC of Formula: 98-98-6)
Picolinic acid(cas: 98-98-6) is used as a chelate for alkaline earth metals. Used to prepare picolinato ligated transition metal complexes. In synthetic organic chemistry, has been used as a substrate in the Mitsunobu reaction and in the Hammick reaction.HPLC of Formula: 98-98-6