Fucoidan-mediated green synthesis of palladium nanoparticles as a recyclable
catalyst for Heck coupling and alkyne reduction in pheromone synthesis
#MMPMID41384058
Le VD
; Phan MV
; Phan NM
; Ngo NK
; Le TY
; Mai TV
; Pham DH
; Tran MT
; Nguyen MT
; Nguyen TC
; Nguyen TD
; Mai DT
; Tran TN
; Nguyen TT
; Huynh HN
; Dang CH
RSC Adv
2025[Dec]; 15
(57
): 49074-49087
PMID41384058
show ga
The development of sustainable routes for metallic nanocatalysts remains
challenging due to the reliance on toxic reagents and harsh synthesis conditions.
To address this, a green and efficient method was established for the preparation
of palladium nanoparticles (PdNPs@Fu) using fucoidan, a naturally occurring
polysaccharide with several hydroxyl and sulfate groups as a stabilizing and
reducing agent. Fucoidan can rapidly reduce Pd(2+) to Pd(0) in aqueous medium
under microwave irradiation (450 W, 10 min). The resulting PdNPs@Fu exhibited
uniform crystalline nanoparticles (sizes ranging from 2-6 nm and an average
diameter of 3.83 ± 0.09 nm), with long-term colloidal stability over 30 days.
Catalytic studies demonstrated remarkable activity in model organic
transformations: the Heck coupling (93% yield, 84% after five cycles) and the
selective semi-hydrogenation of alkynes to (Z)-alkenes (94% yield, 85% retained
activity). Notably, the catalyst afforded an overall yield of 78% in the
synthesis of the sweet potato weevil (Cylas formicarius) pheromone. This research
introduces a green synthesis strategy of PdNPs, integrating nanotechnology with
efficient pheromone synthesis for insect control.
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