Impact of Inclusion Complex Formation on Absorption and Emission Characteristics of Some 4-Arylidenamino-5-phenyl-4H-1,2,4-triazole-3-thiols
作者:Sunakar Panda、Sashikanta Nayak、P.K. Das、D.L. Singh
DOI:10.14233/ajchem.2016.19556
日期:——
The inclusion complexes of a series of 4-arylidenamino-5-phenyl-4H-1,2,4-triazole-3-thiols have been synthesized with b-cyclodextrin. The compounds and their inclusion complexes have been characterized by studying their physical and spectral properties. The thermodynamic stability constant and free energy of activation have been determined to know the stability of inclusion complexes and type of host-guest relation. Finally, the absorption, excitation and emission spectra of the compounds and their inclusion complexes have been taken to examine whether the inclusion complex formation has any impact on absoption and emission characteristics of 4-arylidenamino-5-phenyl-4H-1,2,4-triazole-3-thiols. It is found that inclusion complex formation brings about a drastic change in absorption, excitation and emission spectra of newly synthesized compounds.
一系列4-芳基亚胺基-5-苯基-4H-1,2,4-三氮唑-3-硫醇的包合物与β-环糊精合成。通过研究它们的物理和光谱性质,对这些化合物及其包合物进行了表征。为了解包合物的稳定性及主客体关系的类型,确定了热力学稳定常数和活化自由能。最后,使用吸收、激发和发射光谱来检查包合物形成是否对4-芳基亚胺基-5-苯基-4H-1,2,4-三氮唑-3-硫醇的吸收和发射特性产生影响。结果发现,包合物的形成导致新合成化合物的吸收、激发和发射光谱发生了剧烈变化。