Department of Chemistry, Dr B R Ambedkar National Institute of Technology Jalandhar, Jalandhar, 144011, Punjab, India.
Orig Life Evol Biosph. 2013 Jun;43(3):207-20. doi: 10.1007/s11084-013-9338-1. Epub 2013 Jun 29.
The interaction of aromatic amines (aniline, p-chloroaniline, p-toludine and p-anisidine) with iron oxides (goethite, akaganeite and hematite) has been studied. Maximum uptake of amines was observed around pH 7. The adsorption data obtained at neutral pH were found to follow Langmuir adsorption. Anisidine was found to be a better adsorbate probably due to its higher basicity. In alkaline medium (pH > 8), amines reacted on goethite and akaganeite to give colored products. Analysis of the products by GC-MS showed benzoquinone and azobenzene as the reaction products of aniline while p-anisidine afforded a dimer. IR analysis of the amine-iron oxide hydroxide adduct suggests that the surface acidity of iron oxide hydroxides is responsible for the interaction. The present study suggests that iron oxide hydroxides might have played a role in the stabilization of organic molecules through their surface activity and in prebiotic condensation reactions.
芳香胺（苯胺、对氯苯胺、对甲苯胺和对茴香胺）与氧化铁（针铁矿、纤铁矿和赤铁矿）的相互作用已被研究。在 pH 值约为 7 时观察到胺的最大吸收。在中性 pH 下获得的吸附数据发现遵循 Langmuir 吸附。茴香胺可能是一种更好的吸附剂，可能是因为它的碱性更高。在碱性介质（pH > 8）中，胺与针铁矿和纤铁矿反应生成有色产物。通过 GC-MS 对产物进行分析表明，苯胺的反应产物为苯醌和偶氮苯，而对茴香胺则生成二聚体。胺-氧化铁氢氧化物加合物的红外分析表明，氧化铁氢氧化物的表面酸度是相互作用的原因。本研究表明，氧化铁氢氧化物可能通过其表面活性和在原始生物缩合反应中在稳定有机分子方面发挥了作用。
