Research progress on high performance Nd‐Fe‐B permanent magnet

Li, W.; Pan, Wei; Guo, Yanqun; Guo, Zhaohui; Zhu, Minggang; Li, A. H.; Li, X. M.; Cui, Jun

doi:10.1002/pssc.200777319

Cited by 2 publications

(1 citation statement)

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“…Then aggregated into the hexagonal‐plate microcrystals, they found the intermolecular hydrogen bonds between adjacent M2 molecules might suppress the ESIPT process in the solid state . In effect, for these two similar M1 and M2 structures, it should be better to make a comparative investigation about excited‐state dynamical behaviors, since different structures do result in different possible processes . Moreover, previous experimental reports do not focus on clarifying excited‐state mechanism for both M1 and M2 systems.…”

Section: Introductionmentioning

confidence: 99%

Revealing and comparing different excited‐state intramolecular proton transfer processes for 3‐(4‐dimethylamino‐phenyl)‐1‐(4‐fluoro‐2‐hydroxy‐phenyl)‐propenone and 3‐(4‐dimethylamino‐phenyl)‐1‐(4‐fluoro‐2‐hydroxy‐phenyl)‐3‐hydroxy‐propenon

Gao

Song

Yang

et al. 2020

J Chinese Chemical Soc

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Two novel 2′‐hydroxychalcone derivatives (i.e., M1 and M2) are explored in this work. We mainly focus on investigating the effects of photoexcitation on hydrogen bonds and on the excited‐state intramolecular proton transfer (ESIPT) process. On the basis of calculations of electrostatic potential surface and intramolecular interactions, we verify the formation of hydrogen bond O1H2···O3 in both S0 and S1 states. Exploring the ultraviolet–visible spectra in the liquid phase, our simulated results reappear in the experimental phenomenon. Analyzing molecular geometry and infrared stretching vibrational spectra, we confirm O1H2···O3 is strengthened for both M1 and M2 in the S1 state. We further confirm that charge redistribution facilitates ESIPT tendency. Constructing potential energy curves, we find the ultrafast ESIPT behavior for M1, which is because of the deficiency of side hydroxyl moiety comparing with M2. This work makes a reasonable affiliation of the ESIPT mechanism for M1 and M2. We wish this paper could facilitate understanding these two novel systems and promote their applications.

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Section: Introductionmentioning

confidence: 99%