In 2014,Sharma, Sanjeev; Kim, Hyungjun; Lee, Young Hoon; Kim, Taewon; Lee, Yoon Sup; Lee, Min Hyung published 《Heteroleptic Cyclometalated Iridium(III) Complexes Supported by Triarylborylpicolinate Ligand: Ratiometric Turn-On Phosphorescence Response upon Fluoride Binding》.Inorganic Chemistry published the findings.Synthetic Route of C7H6BrNO2 The information in the text is summarized as follows:
Heteroleptic cyclometalated iridium(III) complexes (CN̂)2Ir(Bpic) (4-6) (CN̂ = dfppy (4), ppy (5), btp (6)) supported by triarylborylpicolinate (Bpic) ancillary ligand were synthesized and characterized. X-ray diffraction (XRD) study of 5 confirmed NÔ chelation of the Bpic ligand to the iridium center forming an (CN̂)2Ir-borane conjugate. While the UV/vis absorption bands of 4-6 remained almost unchanged in the low-energy region upon fluoride addition, a ratiometric turn-on phosphorescence response was observed for 4 and 5. In contrast, the phosphorescence of 6 was little affected by fluoride binding. Exptl. and theor. studies suggest that the LUMO in neutral 4 and 5 is dominated by the Bpic ligand, which makes the weakly emissive 3ML’CT/3LL’CT (L = CN̂; L’ = Bpic) states as the lowest-energy triplet excited state, while the fluoride binding to 4 and 5 induces the highly emissive 3MLCT/3ππ* states centered on the (CN̂)2Ir moiety. Thermally induced conversion from the 3MLCT/3ππ* to the 3ML’CT/3LL’CT states is suggested to be responsible for the low-energy weak phosphorescence in 4 and 5. In addition to this study using Methyl 5-bromopicolinate, there are many other studies that have used Methyl 5-bromopicolinate(cas: 29682-15-3Synthetic Route of C7H6BrNO2) was used in this study.
Methyl 5-bromopicolinate(cas: 29682-15-3) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. Synthetic Route of C7H6BrNO2