New discoveries in chemical research and development in 2021. The appropriate choice of redox mediator can avoid electrode passivation and overpotential, which strongly inhibit the efficient activation of substrates in electrolysis.1714-29-0, Name is 1-Bromopyrene, molecular formula is C16H9Br. In an article, author is Du, Can,once mentioned of 1714-29-0, Category: benzoxazole.
The excited-state intramolecular proton transfer (ESIPT) process of 6-amino-2-(2 ‘-hydroxyphenyl) benzoxazole (6A-HBO) was investigated using density functional theory and time-dependent density functional theory methods with B3LYP and TZVP basis sets. n-Heptane, dichloromethane, methanol, and acetonitrile were chosen as a series of polar solvents in calculations using the IEFPCM model. To obtain a more comprehensive ESIPT mechanism, we constructed the S-0 and S-1 states’ potential energy surfaces (PESs) by incrementally twisting the OH bond and increasing the distance of O-H bond. Based on the analysis of the bond lengths, the IR vibrational spectra, and the frontier molecular orbits (MOs), the intramolecular hydrogen bonding (OH…N) is clearly strengthened, and the charge is redistributed in the S-1 state. The results of calculated absorption spectrum are in accord with the experimental data. The fluorescence spectrum of 6A-HBO-enol showed a normal red shift, but the red shift of the 6A-HBO-keto is larger and increases with the solvent polarity, indicating a charge transfer. Analysis of the PESs indicates a lower potential energy barrier in S-1 state for the proton transfer from the O atom to the N atom, with the excited state potential barrier slightly decreasing with the increase of the solvent polarity.
I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 1714-29-0 help many people in the next few years. Category: benzoxazole.
Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem