The application of MNPs-Ag catalysts in organic synthesis

He, Rong; Zhou, Jinqiu; Mao, Wenjing

doi:10.1080/00397911.2021.1887260

Cited by 2 publications

(1 citation statement)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, the use of heterogeneous catalysts received attention in the organic synthesis field due to their high efficiency and ease of recovery. − The use of these recoverable heterogeneous catalysts reduces the environmental risks that can arise from the use of nonrecoverable homogeneous catalysts without a significant reduction in the yield of synthesized compounds . In the presence of UV light, FeCu@N-doped carbon is an efficient catalyst that can be applied for converting amines with alcohols into Schiff bases .…”

Section: Introductionmentioning

confidence: 99%

Base-Free Synthesis and Photophysical Properties of New Schiff Bases Containing Indole Moiety

et al. 2022

View full text Add to dashboard Cite

Schiff bases represent an essential class in organic chemistry with antitumor, antiviral, antifungal, and antibacterial activities. The synthesis of Schiff bases requires the presence of an organic base as a catalyst such as piperidine. Base-free synthesis of organic compounds using a heterogeneous catalyst has recently attracted more interest due to the facile procedure, high yield, and reusability of the used catalyst. Herein, we present a comparative study to synthesize new Schiff bases containing indole moieties using piperidine as an organic base catalyst and Au@TiO 2 as a heterogeneous catalyst. In both methods, the products were isolated in high yields and fully characterized using different spectral analysis techniques. The catalyst was reusable four times, and the activity was slightly decreased. The presence of Au increases the number of acidic sites of TiO 2 , resulting in C=O polarization. Yields of the prepared Schiff bases in the presence of Au@TiO 2 and piperidine were comparable. However, Au@TiO 2 is an easily separable and recyclable catalyst, which would facilitate the synthesis of organic compounds without applying any hazardous materials. Furthermore, the luminescence behavior of the synthesized Schiff bases exhibited spectral shape dependence on the substituent group. Interestingly, the compounds also displayed deep-blue fluorescence with Commission Internationale de l’Éclairage (CIE) coordinates of y < 0.1. Thus, these materials may contribute to decreasing the energy consumption of the emitting devices.

show abstract