Phthalocyanine-Cored Fluorophores with Fluorene-Containing Peripheral Two-Photon Antennae as Photosensitizers for Singlet Oxygen Generation
作者:Seifallah Abid、Sarra Ben Hassine、Nicolas Richy、Franck Camerel、Bassem Jamoussi、Mireille Blanchard-Desce、Olivier Mongin、Frédéric Paul、Christine O. Paul-Roth
DOI:10.3390/molecules25020239
日期:——
in the fluorenyl-based π-π* absorption band of these chromophores. Once excited, these compounds relax to the ground state, mostly by emitting intense red light or by undergoing intersystem crossing. As a result, the tetrafunctionalized Zn(II) phthalocyanines are fluorescent, but can also efficiently photosensitize molecular oxygen in tetrahydrofurane (THF), forming singlet oxygen with nearly comparable
:合成并表征了一系列的游离碱和Zn(II)酞菁,其特征在于芴基触角通过甲氧基或氧代桥连接到酞菁核(Pc)。随后研究了这些新化合物的选定的线性和非线性(双光子吸收)光学性质。如先前对于带有2-芴基外围树突的相关卟啉树枝状大分子所观察到的,在这些生色团的基于芴基的π-π*吸收带中激发之后,从外围触角到中心酞菁核芯发生了有效的能量转移。一旦激发,这些化合物就会松弛到基态,主要是通过发出强烈的红光或经历系统间交叉。结果,四官能化的Zn(II)酞菁具有荧光性,但还可以有效地使四氢呋喃(THF)中的分子氧光敏化,形成单线态氧,其收率几乎与裸露的Zn(II)酞菁(ZnPc)相当。与后者的复合物相比,当在周边(β)位置附加到酞菁核上时,目前证明了含芴基的触角对单光子和双光子亮度(2PA)的积极作用。此外,当与已知的卟啉类似物比较时,显然建立了以酞菁代替卟啉作为中心核心以获得更多荧光二光子氧光敏剂的兴趣。因