Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/103821
Title: The Catalytic Activity of Carbon-Supported Cu(I)-Phosphine Complexes for the Microwave-Assisted Synthesis of 1,2,3-Triazoles
Authors: Librando, Ivy L.
Mahmoud, Abdallah G.
Carabineiro, Sónia A. C.
Guedes da Silva, M. Fátima C.
Geraldes, Carlos F. G. C. 
Pombeiro, Armando J. L.
Keywords: Cu(I) complexes; phosphine; DAPTA ligands; carbon nanotubes; click chemistry; CuAAC; triazoles; microwave
Issue Date: 2021
Publisher: MDPI
Project: UIDB/00100/2020 
FCT - Scientific Employment Stimulus-Institutional Call (CEECINST/ 00102/2018) 
UIDB/50006/2020 
UIDP/50006/2020 
CATSUS Ph.D. Program - grant (PD/BD 135555/2018) 
post-doctoral fellowship through the project CO2usE-1801P.00867.1.01 (Contract No. IST-ID/263/2019) 
RUDN University Strategic Academic Leadership Program 
Serial title, monograph or event: Catalysts
Volume: 11
Issue: 2
Abstract: A set of Cu(I) complexes with 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo-[3.3.1]nonane (DAPTA) phosphine ligands viz. [CuX( P-DAPTA)3] (1: X = Br; 2: X = I) and [Cu( -X)( P-DAPTA)2]2 (3: X = Br; 4: X = I) were immobilized on activated carbon (AC) and multi-walled carbon nanotubes (CNT), as well as on these materials after surface functionalization. The immobilized copper(I) complexes have shown favorable catalytic activity for the one-pot, microwave-assisted synthesis of 1,2,3-triazoles via the azide-alkyne cycloaddition reaction (CuAAC). The heterogenized systems with a copper loading of only 1.5–1.6% (w/w relative to carbon), established quantitative conversions after 15 min, at 80 C, using 0.5 mol% of catalyst loading (relative to benzyl bromide). The most efficient supports concerning heterogenization were CNT treated with nitric acid and NaOH, and involving complexes 2 and 4 (in the same order, 2_CNT-ox-Na and 4_CNT-ox-Na). The immobilized catalysts can be recovered and recycled by simple workup and reused up to four consecutive cycles although with loss of activity.
URI: https://hdl.handle.net/10316/103821
ISSN: 2073-4344
DOI: 10.3390/catal11020185
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais
FCTUC Ciências da Vida - Artigos em Revistas Internacionais

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