Jia, Jidong; Zhang, Xueru; Wang, Yuxiao; Shi, Yufang; Sun, Jinyu; Yang, Junyi; Song, Yinglin published the artcile< Enhanced Two-Photon Absorption of Cross-Conjugated Chalcone Derivatives: Modulation of the Effective π-Conjugated Structure>, Recommanded Product: 1-(Pyridin-3-yl)ethanone, the main research area is enhanced photon absorption cross conjugated chalcone derivative modulation effective.
Three cross-conjugated chalcone derivatives T3CT, T3CP2, and T3CP3 were designed and synthesized to develop excellent organic nonlinear optical (NLO) materials. In a Z-scan experiment, all compounds show good NLO absorption characteristics in the visible to near-IR region. The photophys. mechanism is confirmed to be two-photon absorption (TPA)-induced excited-state absorption (ESA). Intramol. charge transfer (ICT) observed in transient absorption spectra (TAS) significantly affects mol. NLO properties. We define the π-conjugated system that dominates the electron transition process in the cross-conjugated structure as the effective π-conjugated structure. Electron transition anal. shows a sufficiently strong ICT can effectively expand the effective π-conjugated structure in these cross-conjugated structures. The TPA cross sections of these compounds at 650 and 750 nm are only in the range of 17-97 GM. However, we achieve a significant enhancement of the TPA cross section at 580 nm (1737-2027 GM) by extending the effective π-conjugated structure. Excited by 580 nm femtosecond laser pulses, all compounds exhibit excellent OL performance and the min. OL threshold is 4.71 x 10-3 J/cm2. The results show that these cross-conjugated chalcone derivatives have promising applications in OL, and their NLO performance can be effectively improved by modulating the effective π-conjugated structure.
Journal of Physical Chemistry A published new progress about Conjugation (bond). 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, Recommanded Product: 1-(Pyridin-3-yl)ethanone.