Efficient Emission of Ultraviolet Light by Solid State Organic Fluorophores: Synthesis and Characterization of 1,4‐Dialkeny‐2,5‐dioxybenzenes
作者:Masaki Shimizu、Kenta Nishimura、Rika Hirakawa、Tsuneaki Sakurai
DOI:10.1002/chem.202003526
日期:2021.1.21
that the optical excitation of the dialkenyldimethoxybenzenes involves intramolecular charge‐transfer from the ether oxygen atoms to the twisted alkenyl‐benzene‐alkenyl moiety, whereas the dialkenylbis(triphenylsiloxy)benzenes were optically excited through intramolecular charge‐transfer from the oxygen atoms and twisted π‐system to the phenyl‐Si moieties of each triphenylsilyl group.
在固态中表现出有效的紫外线(UV)荧光的有机发光体的设计和开发仍未得到开发。在这里,我们报道了1,4-二烯基-2,5-二烷氧基苯和1,4-二烯基-2,5-二甲硅烷氧基充当此类UV发射荧光团。二烯基二氧基苯可以很容易地从3,5-二甲氧基-1,4-二乙酰苯或2,5-二甲氧基-1,4-二甲酰苯分三步制备,从1,4-双(二乙氧基膦酰基甲基)-2-5分两步制备。 -二甲氧基苯。所述dialkenyldioxybenzenes发射UV光在溶液中(λ EM = 350-387纳米)和在固体状态(λ EM= 328–388 nm)。另外,固态的量子产率通常高于溶液中的量子产率。特别是金刚烷取代的苯在紫外区以固态发出高量子产率(Φ = 0.37–0.55)的荧光。掺杂有金亚甲基取代苯的聚甲基丙烯酸甲酯薄膜也具有良好的紫外线发射率(Φ= 0.27–0.45)。密度泛函理论计算表明,二烯基二甲氧基苯的光激发涉及