Chemistry Department, Science College, University of Al-Qadisiyah, Al Diwaniyah, Iraq.
ScientificWorldJournal. 2021 Jul 21;2021:9943763. doi: 10.1155/2021/9943763. eCollection 2021.
This article includes the synthesis of heterocyclic azo dye of theophylline by coupling diazonium salt of 4-chloroaniline with theophylline which is, namely, 8-(1-(4-chlorophenyl)azo)theophylline (CPAT). The complexes of cobalt and nickel were prepared by reacting their ions with CPAT ligand in ethanol under 1 : 2 ratio metal-ligand. The CPAT ligand and its complexes were characterized by elemental analysis, infrared spectrometry, electronic absorption spectroscopy, molar conductivity, and magnetic moment. The cobalt and nickel complexes show octahedral geometry having general formula [M(CPAT)Cl]. This article addresses the properties of CPAT dye such as photochromic properties. The CPAT dye exhibited obvious and desired changes under irradiation with visible light (405 nm), high sensitive for pH changes which refer to its ability to be analysis indicator. CPAT dye exhibited solvatochromic properties presenting red shift with polar solvent. The CPAT and its complexes show interesting antibiological activities towards and bacteria and fungi.
本文包括茶碱偶氮杂环染料的合成，即 8-(1-(4-氯苯基)偶氮)茶碱（CPAT），通过将 4-氯苯胺的重氮盐与茶碱偶联。在乙醇中，以 1:2 的金属-配体比例，通过其离子与 CPAT 配体反应，制备钴和镍的配合物。CPAT 配体及其配合物通过元素分析、红外光谱、电子吸收光谱、摩尔电导率和磁矩进行表征。钴和镍配合物具有八面体几何形状，具有通式[M(CPAT)Cl]。本文介绍了 CPAT 染料的性质，如光致变色性质。CPAT 染料在可见光（405nm）照射下表现出明显和所需的变化，对 pH 值变化高度敏感，这表明其具有作为分析指示剂的能力。CPAT 染料具有溶剂化变色性质，在极性溶剂中呈现红移。CPAT 及其配合物对 和 细菌和 真菌表现出有趣的抗微生物活性。
