In 2019,Journal of Physical Chemistry B included an article by Amoruso, Giordano; Taylor, Victoria C. A.; Duchi, Marta; Goodband, Emma; Oliver, Thomas A. A.. Recommanded Product: 1-Methyl-1H-imidazole. The article was titled 《Following Bimolecular Excited-State Proton Transfer between Hydroxycoumarin and Imidazole Derivatives》. The information in the text is summarized as follows:
The ultrafast dynamics of a bimol. excited-state proton transfer (ESPT) reaction between the photoacid 7-hydroxy-4-(trifluoromethyl)-1-coumarin (CouOH) and 1-methylimidazole (MI) base in aprotic chloroform-d1 solution were investigated using ultrafast transient IR (TRIR) and transient absorption (TA) spectroscopies. The excited-state lifetime of the photoacid in solution is relatively short (52 ps), which at the millimolar photoacid and base concentrations used in our study precludes any diffusion-controlled bimol. ESPT reactions. This allows the prompt ESPT reaction between hydrogen-bonded CouOH and MI mols. to be studied in isolation and the “”contact”” ESPT dynamics to be unambiguously determined Our time-resolved studies reveal that ultrafast ESPT from the CouOH moiety to hydrogen-bonded MI mols. occurs within ∼1 ps, tracked by unequivocal spectroscopic signatures of CouO-* photoproducts that are formed in tandem with HMI+. Some of the ESPT photoproducts subsequently π-stack to form exciplexes on a ∼35 ps time scale, minimizing the attractive Coulombic forces between the oppositely charged aromatic mols. For the concentrations of CouOH and MI used in our study (up to 8 mM), we saw no evidence for excited-state tautomerization of coumarin anions. After reading the article, we found that the author used 1-Methyl-1H-imidazole(cas: 616-47-7Recommanded Product: 1-Methyl-1H-imidazole)
1-Methyl-1H-imidazole(cas: 616-47-7) is actively involved in removing acid during the production of diethoxyphenylphosphine. It is used as an intermediate in organic synthesis.Recommanded Product: 1-Methyl-1H-imidazole
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem