Effect of electron withdrawing anchoring groups on the optoelectronic properties of pyrene sensitizers and their interaction with TiO2: A combined experimental and theoretical approach
作者:Paramaguru Ganesan、Vijay Solomon Rajadurai、Jagadeeswari Sivanadanam、Venuvanalingam Ponnambalam、Renganathan Rajalingam
DOI:10.1016/j.jphotochem.2013.07.010
日期:2013.11
sensitizers (PC, PN, PMN, PR) with various electron withdrawing anchoring groups have been synthesized to understand their consequence on the optoelectronic properties. All the sensitizers have been characterized by NMR, mass spectroscopic and IR techniques. Absorption measurements revealed that charge transfer transition was enhanced by introducing electron withdrawing groups. Effect of solvents on the absorption
合成了一系列带有各种吸电子锚定基团的of敏化剂(PC,PN,PMN,PR),以了解它们对光电性能的影响。所有的敏化剂均已通过NMR,质谱和IR技术进行了表征。吸收测量表明,引入吸电子基团增强了电荷转移跃迁。通过多参数Catalán溶剂标尺探讨了溶剂对敏化剂吸收和发射性质的影响。发现敏化剂的热稳定性受COOH基团的存在影响。进行DFT / TDDFT计算以深入了解the敏化剂的结构和电子性能。研究of敏化剂与TiO的结合亲和力参照图2,进行吸收测量,结果表明,与具有COOH基团(PR)和NO 2基团(PN)的其他敏化剂相比,具有COOH基团和CN基团(PC)的敏化剂显示出更高的结合亲和力。此外,进行激光闪光光解测量以研究敏化剂和TiO 2之间的电子转移过程。通过检测敏化剂的阳离子自由基来确认电子注入到TiO 2的导带中。我们设想,这项工作的结果将为设计具有预定吸电子锚定基团的新型高效敏化剂及其用于光伏应用的光物理性质铺平道路。