Spectroscopic, computational modeling and cytotoxicity of a series of meso-phenyl and meso-thienyl-BODIPYs
摘要:
A series of twenty-two BODIPY compounds were synthesized, containing various meso-phenyl and meso-thienyl groups, and their spectroscopic and structural properties were investigated using both experimental and computational methods. Further functionalization of the BODIPY framework via iodination at the 2,6-pyrrolic positions was explored in order to determine the effect of these heavy atoms on the photophysical and cytotoxicity of the meso-aryl-BODIPYs. BODIPYs bearing meso-thienyl substituents showed the largest red-shifted absorptions and emissions and reduced fluorescence quantum yields. The phototoxicity of the BODIPYs in human carcinoma HEp2 cells depends on both the presence of iodines and the nature of the meso-aryl groups. Six of the eleven 2,6-diiodo-BODIPYs investigated showed at least a sevenfold enhancement in phototoxicity (IC50 = 3.5-28 mu M at 1.5 J/cm(2)) compared with the non-iodinated BODIPYs, while the others showed no cytotoxicity, while their singlet oxygen quantum yields ranged from 0.02 to 0.76. Among the series investigated, BODIPYs 2a and 4a bearing electron-donating meso-dimethoxyphenyl substituents showed the highest phototoxicity and dark/phototoxicity ratio, and are therefore the most promising for application in PDT. (C) 2013 Elsevier Ltd. All rights reserved.
Heavy-atom-free charge transfer photosensitizers: Tuning the efficiency of BODIPY in singlet oxygen generation via intramolecular electron donor-acceptor interaction
lifetime, excited triplet state formation, and singlet oxygen formation properties are measured. DFT quantum chemical computation is also carried out to explain the experiments. The occurrence of intra-molecular CT is confirmed by UV-Vis absorption, fluorescence properties and quantum chemical computation. The triplet excited state formation is evidenced by laserflashphotolysis technique. The quantitative
A series of beta-formyl-BODIPYs 2 were synthesized in high yields from tetramethyl-BODIPYs 1 via the Vilsmeier-Haack reaction and were further functionalized using a Knoevenagel condensation to generate novel BODIPYs 3 and 4.
Spectroscopic, computational modeling and cytotoxicity of a series of meso-phenyl and meso-thienyl-BODIPYs
作者:Jaime H. Gibbs、Larry T. Robins、Zehua Zhou、Petia Bobadova-Parvanova、Michael Cottam、Gregory T. McCandless、Frank R. Fronczek、M. Graça H. Vicente
DOI:10.1016/j.bmc.2013.07.017
日期:2013.9
A series of twenty-two BODIPY compounds were synthesized, containing various meso-phenyl and meso-thienyl groups, and their spectroscopic and structural properties were investigated using both experimental and computational methods. Further functionalization of the BODIPY framework via iodination at the 2,6-pyrrolic positions was explored in order to determine the effect of these heavy atoms on the photophysical and cytotoxicity of the meso-aryl-BODIPYs. BODIPYs bearing meso-thienyl substituents showed the largest red-shifted absorptions and emissions and reduced fluorescence quantum yields. The phototoxicity of the BODIPYs in human carcinoma HEp2 cells depends on both the presence of iodines and the nature of the meso-aryl groups. Six of the eleven 2,6-diiodo-BODIPYs investigated showed at least a sevenfold enhancement in phototoxicity (IC50 = 3.5-28 mu M at 1.5 J/cm(2)) compared with the non-iodinated BODIPYs, while the others showed no cytotoxicity, while their singlet oxygen quantum yields ranged from 0.02 to 0.76. Among the series investigated, BODIPYs 2a and 4a bearing electron-donating meso-dimethoxyphenyl substituents showed the highest phototoxicity and dark/phototoxicity ratio, and are therefore the most promising for application in PDT. (C) 2013 Elsevier Ltd. All rights reserved.
Synthesis, photodynamic activity, and quantitative structure-activity relationship modelling of a series of BODIPYs
Here we report the synthesis of eleven new BODIPYs (14–24) characterized by the presence of an aromatic ring on the 8 (meso) position and of iodine atoms on the pyrrolic 2,6 positions. These molecules, together with twelve BODIPYs already reported by us (1 − 12), represent a large panel of BODIPYs showing different atoms or groups as substituent of the aromatic moiety. Two physico-chemical features
这里,我们报告的11个新BODIPYs(合成14 - 24),其特征在于通过在8(芳香环的存在内消旋)的位置和碘原子对吡咯2,6位。这些分子中,连同已被我们(报道12个BODIPYs 1 - 12),代表BODIPYs表示不同的原子或基团作为芳族结构部分的取代基的一个大的面板。已经研究了两个物理化学特征(1 O 2生成速率和亲脂性),它们在光敏剂的结果中起着至关重要的作用。在体外在SKOV3细胞系中,在黑暗中处理细胞24小时,然后用绿色LED装置(通量25.2 J / cm 2)照射2 h,研究了23种PS的光诱导杀伤功效。用MTT试验评估细胞杀伤功效,并将其与内消旋未取代化合物之一进行比较(13)。为了理解取代基的可能作用,建立了基于理论整体分子描述符的预测定量构效关系(QSAR)回归模型。结果清楚地表明,芳环的存在是优异的光动力学响应的基础,而芳环上的电子效应和取代基的位置不影响光动力学功效。