Papers by Keyword: Indole

Abstract: In this work, we designed and synthesized two photoresponsive materials with 3-indoleacetic acid (IAA) plant hormone which can be monitored from the photoreposive properties of coumarin. The varied position of the long alkoxy side chain (-OC₁₆H₃₃) was purposely introduced to adhesive on the plant leaves. Two coumarin-caged nanomaterials showed average particle diameter about 400 nm and gave the maximum emission wavelength at 425 and 450 nm. The formulated nanoemulsion showed good wettability (θ=48^o) with Cassia fistula leave surface. Interestingly, CM2 gave the short photoresponse of photolysis within one day.

Abstract: NH₄⁺-N was choiced as an influence factor for analysis the effect on the laccase activity from the white rot fungus Pleurotus ostreatus and indole degradation. The experiments were performed with different NH₄⁺-N concentration, with a focus on the indole degradation by laccase in the presence of 2,2-Azino-bis (3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) or not. Results showed that NH₄⁺-N had a positive effect on laccase activity and also enhanced the degradation of indole. Meanwhile, NH₄⁺-N was oxidized to NO₂^-.

Abstract: A series of Cu-based catalysts for the synthesis of indole by the reaction of aniline and ethylene glycol were prepared and characterized by ICP-AES and XRD. The results indicated that the activity and stability of Cu/SiO₂ catalyst was increased after adding Zn, Mn, Cr and Fe promoters. Mn promoter was favorable for the dispersion of Cu, Zn, Cr, Fe and enlarged the specific surface area of catalysts. It could be seen that the catalysts prepared by impregnation method had better stability and higher activity than the catalysts prepared by co-precipitation method. The catalysts with small grain size of Cu had higher activity than those with big grain size. Some catalysts showed excellent performances in this reaction.

Abstract: The reaction process of synthesis of indole from aniline and ethylene glycol was studied by GC-MS. Based on experimental results, a new reaction process proposed. It was found to be quite complicated with involvement of a few of main phases: condensation, cyclization, elimination and so on, which provides a theoretical guild for the development of used catalysts. It could be presupposed that the yield of synthesis of indole was related to dehydrogenation activity of catalysts.

Abstract: A series of novel bis-indolylmethanes containing 1,2,3-triazolyl have been synthesized from the reaction of indoles with 4-formyl-1,2,3-triazole catalyzed by Brønsted acidic ionic liquid [PyNCH₂CO₂H][HSO₄] under solvent-free conditions. The satisfactory results were obtained with excellent yields and short reaction time in the experimental procedure.