Laser Flash Photolysis Study of the Magnetic Field Effects on the Biradicals Generated from Aromatic Ketone-Xanthene Bifunctional Chain Molecules
作者:Yoshifumi Tanimoto、Masanobu Takashima、Michiya Itoh
DOI:10.1246/bcsj.62.3923
日期:1989.12
the biradicals generated from the intramolecular photoreactions of bifunctional chain molecules, α-(xanthone-2-carbonyloxy)-ω-(xanthene-2-carbonyloxy)alkanes (XO-n-XH, n=2–12) and Ar-12-XH (Ar=anthraquinone-4-carbonyloxy (AQ), 4-benzoylphenoxy (BP), and 4-acetylphenoxy (AP)) were studied by laser flash photolysis. All biradicals exhibit significant MFE. The simultaneous observation of the effects on
双官能链分子α-(xanthone-2-carbonyloxy)-ω-(xanthene-2-carbonyloxy)alkanes (XO-n-XH, n= 2-12) 和 Ar-12-XH(Ar=蒽醌-4-羰氧基(AQ)、4-苯甲酰苯氧基(BP)和 4-乙酰苯氧基(AP))通过激光闪光光解进行研究。所有双自由基都表现出显着的 MFE。同时观察对由 XO-12-XH、AQ-12-XH 和 BP-12-XH 产生的链末端两个自由基的影响,提供了明确的证据,即各自的两个自由基中心在磁性上相互关联其他。XO-n-XH 产生的双自由基效应的 n 依赖性表明双自由基的单线态-三线态简并发生在 n=6 左右的链长处,即,