| Synthesis of Dibenzo[a,j]Xanthene Derivatives Using a Heterogeneous Catalyst Based on Ni Nanoparticles Decorated on a Graphene Organic Framework with a Thiadiazole Ligand (Ni@GOF-TDA) |
| کد مقاله : 1068-ICOC |
| نویسندگان |
|
نادیه ناصری1، رویا آزادی *2، سپیده سمیعی2 1دانشگاه شهیدچمران اهواز 2دانشگاه شهید چمران اهواز |
| چکیده مقاله |
| This study investigated the efficient synthesis of dibenzo[a,j]xanthene derivatives through a one-pot condensation process using a newly designed heterogeneous catalyst. The goal was to create and characterize a robust, reusable, and stable solid catalyst for eco-friendly synthesis, overcoming the limitations of homogeneous catalysts and harsh conditions. A graphene organic framework (GOF-TDA) was synthesized by cross-linking nanosheets of graphene oxide (GO) with 5-(4-nitrophenyl)-1,3,4-thiadiazol-2-amine (TDA) as the pillaring agent. The resulting GOF-TDA, with its interlayer spaces, served as a support for immobilizing nickel nanoparticles [1, 2]. The catalytic activity of Ni@GOF-TDA was evaluated in the condensation of aldehydes with β-naphthol under solvent-free conditions. Ni@GOF-TDA exhibited exceptional catalytic performance, achieving high yields (90-97%) of desired xanthenes in short reaction times under mild heating. The entitled catalyst demonstrated excellent stability and was readily recovered and reused for at least five cycles without significant loss of activity. The efficiency of Ni@GOF-TDA composite is attributed to the synergistic effect between well-dispersed Ni nanoparticles and the mesoporous, stabilizing GOF-TDA support. Its convenient operation, eco-friendliness, easy purification, and high yield make this method viable for laboratory research and industrial scales. |
| کلیدواژه ها |
| Graphene organic framework, heterogeneous catalyst, nickel nanoparticles |
| وضعیت: پذیرفته شده |