Gelation-Induced Enhanced Fluorescence Emission from Organogels of Salicylanilide-Containing Compounds Exhibiting Excited-State Intramolecular Proton Transfer: Synthesis and Self-Assembly
作者:Manoj Kumar Nayak、Byung-Hwa Kim、Ji Eon Kwon、Sanghyuk Park、Jangwon Seo、Jong Won Chung、Soo Young Park
DOI:10.1002/chem.200902615
日期:2010.7.5
bonding. The supramolecular arrangement in these organogels predicted by XRD shows lamellar and hexagonal columnar structures for gelators 3 and 4, respectively. Of particular interest is the observation of significant fluorescence enhancement accompanying gelation, which was ascribed to the formation of J‐aggregates and inhibition of intramolecular rotation in the gel state.
通过场发射扫描电子显微镜(FESEM),X射线研究了由水杨酰苯胺3和4形成的新型低分子量有机胶凝剂(LMOG)的自组装结构,稳定性,氢键相互作用和光学性质。衍射(XRD),UV / Vis吸收和光致发光,以及DFT的理论研究和CI(AM1 / PECI = 8)方法的半经验计算。结果发现,水杨酰苯胺在非极性溶剂中由于π堆积相互作用以及分子间和分子内氢键的存在而形成凝胶。XRD预测的这些有机凝胶中的超分子排列显示了胶凝剂3和4的层状和六角柱状结构, 分别。特别令人感兴趣的是观察到伴随凝胶化的显着荧光增强,这归因于J-聚集体的形成和在凝胶状态下分子内旋转的抑制。