Synthesis and spectroscopic analysis of benzylidene imidazolone linked to P-porphyrins through axial ligand
作者:Jin Matsumoto、Kyosuke Takemori、Jun Ishikawa、Yu Nabetani、Mamoru Fujitsuka、Tetsuro Majima、Masahide Yasuda
DOI:10.1007/s00044-018-2255-0
日期:2018.12
Tetraphenylporphyrinatophosphorus(V) complexes (1) comprising two axially linked benzylidene imidazolone (Biz) moieties, which are chromophores of the green fluorescent protein, were prepared. In medical applications such as photodynamic therapy, the P-porphyrin part (Ptp) is expected to sensitize to generate singlet oxygen, whereas the Biz units act as fluorescent probes. The fluorescence spectra
制备了包含两个轴向连接的亚苄基咪唑酮(Biz)部分的四苯基卟啉对磷(V)络合物(1),其为绿色荧光蛋白的发色团。在诸如光动力疗法的医学应用中,预计P-卟啉部分(Ptp)会敏化产生单线态氧,而Biz单位则充当荧光探针。在370 nm的Biz激发下分析1的荧光光谱。分别在460和610 nm处观察到由Biz和Ptp激发态引起的荧光。发生了由Ptp激发的单重态Biz的分子内猝灭,导致Biz发出的荧光弱。在Biz单位1中引入氰基提高了他们的荧光量子产率高达7.7×10 -4。在550 nm的Ptp激发下1的荧光光谱与不含Biz发色团的二甲氧基四苯基卟啉氯化磷的对-卟啉参考化合物的荧光光谱极为相似。在对卟啉的轴向位置引入Biz后,Ptp的理化参数保持不变。