In 2022,Chemical Communications (Cambridge, United Kingdom) included an article by Hattori, Yohei; Kitajima, Ryota; Matsuoka, Ryota; Kusamoto, Tetsuro; Nishihara, Hiroshi; Uchida, Kingo. Category: imidazoles-derivatives. The article was titled 《Amplification of luminescence of stable radicals by coordination to NHC-gold(I) complex》. The information in the text is summarized as follows:
Gold NHC pyridine complexes I·SbF6 (R = 2,6-iPr2C6H3, 2,4,6-Me3C6H2, Cy, Me; X = H, X-X = benzo), substituted by stable radical in pyridine 4-position, were prepared and examined for photoluminescence properties. The luminescence of stable radicals can be enhanced by coordination to metal complexes. The 4% fluorescence quantum yield of (3,5-difluoro-4-pyridyl)bis(2,4,6-trichlorophenyl)methyl radical (F2PyBTM) in dichloromethane was enhanced up to 36% by coordination to AuI with N-heterocyclic carbene ligand, which is a record for metal-radical complexes.Chloro{1,3-bis[2,6-bis(1-methylethyl)phenyl]-4,5-dihydroimidazol-2-ylidene}gold(I)(cas: 852445-84-2Category: imidazoles-derivatives) was used in this study.
Chloro{1,3-bis[2,6-bis(1-methylethyl)phenyl]-4,5-dihydroimidazol-2-ylidene}gold(I)(cas: 852445-84-2) belongs to imidazoles.Although other azole heterocycles are ubiquitous in a wide range of biologically active natural products, imidazole rings occur predominantly in the natural amino acid histidine. In addition, imidazole rings are part of unnatural cyclic peptides and are used as ester isosteres in peptidomimetic studies. Category: imidazoles-derivatives
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem