Department of Chemistry, Science Faculty, Selcuk University, Campus, 42075 Konya, Turkey.
J Fluoresc. 2012 Sep;22(5):1357-70. doi: 10.1007/s10895-012-1075-8. Epub 2012 Jun 14.
Aromatic chromophores; pyrene, phenanthrene, anthracene, naphtalene and benzene-tethered Schiff base ligands and their iron(III)/chromium(III) Salen and Saloph capped complexes have been synthesized. Compounds have been characterized by means of FT-IR Spectroscopy, (1)H-NMR Spectroscopy, Magnetic Susceptibility, Elementel Analsis, TG/DTA measurements. Their fluorescence and absorbance properties have been investigated by Luminescence Spectroscopy and UV-vis Spectroscopy. Generally, ligands show an intense excimer fluorescence emissions in acetonitrile-methanol medium while iron(III) and chromium(III) complexes exhibit low fluorescence's. Intensity compared to ligands iron and chromium centers act as an extra chromophore that quench the pyrene, phenanthrene, anthracene, naphtalene and benzene molecules' singlet state. The mechanism of quenching is attributed to a iron (or chromium)-to-pyrene (or phenanthrene, anthracene, naphtalene and benzene) electronic energy transfer process.
芳香发色团；芘、菲、蒽、萘和苯桥连席夫碱配体及其铁(III)/铬(III)Salen 和 Saloph 封端配合物已被合成。通过傅里叶变换红外光谱、（1）H-NMR 光谱、磁化率、元素分析、TG/DTA 测量对化合物进行了表征。通过荧光光谱和紫外可见光谱研究了它们的荧光和吸收性质。通常，配体在乙腈-甲醇介质中显示出强烈的分子内缔合物荧光发射，而铁(III)和铬(III)配合物则表现出低荧光。与配体相比，铁和铬中心的强度作为额外的发色团，猝灭了芘、菲、蒽、萘和苯分子的单重态。猝灭机制归因于铁（或铬）到芘（或菲、蒽、萘和苯）的电子能量转移过程。
