- Details
- Published on 06 August 2020
Metal-Organic Framework Cu2(OBA)2(BPY) as efficient catalyst for C–O bond formation via oxidative cross-coupling reaction of benzaldehyde and 1,4-dioxane
Huynh Quoc Thai1, Nguyen Thi Ngoc Tran1, Ha Thanh My Phuong1, Dang Huynh Giao1,2, Doan Hoai Son1, Phan Thanh Son Nam1This email address is being protected from spambots. You need JavaScript enabled to view it.
1 Faculty of Chemical Engineering, Ho Chi Minh City University of Technology, VNU-HCM, Vietnam
2 College of Engineering Technology, Can Tho University, Vietnam
ABSTRACT
A metal-organic framework Cu2(OBA)2(BPY) was synthesized, and was used as an efficient heterogeneous catalyst for the oxidative cross-coupling reaction of benzaldehyde and 1,4-dioxane to form 1,4-dioxan-2-yl benzoate as major product. The coupling reaction could proceed readily, with more than 80 % reaction yield being achieved after 24 h at 80℃ in the presence of 2 mol% Cu2(OBA)2(BPY) catalyst and tert-butyl hydroperoxide in water as an oxidant. The Cu2(OBA)2(BPY) was reutilized numerous times for the reaction without a noteworthy decline in catalytic efficiency. This Cu-MOF exhibited higher activity than other MOFs and traditional homogeneous catalysts in the oxidative coupling reaction. To the best of our knowledge, this transformation using heterogeneous catalyst was not previously mentioned in the literature.
- Details
- Published on 06 August 2020
Well-defined rod coil diblock copolymers based on poly(3-hexylthiophene) and poly(methyl methacrylate) via metal-free atom transfer radical polymerization
Nguyen Huu Tam1This email address is being protected from spambots. You need JavaScript enabled to view it. , Tran Minh Hoan1, Truong Thu Thuy1, Nguyen Tran Ha1,2 This email address is being protected from spambots. You need JavaScript enabled to view it.
1 Faculty of Materials Technology, Ho Chi Minh City University of Technology, Vietnam National University, 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, VIETNAM
2 Materials Technology Key Laboratory (Mtlab), Ho Chi Minh City University of Technology – Vietnam National University – Ho Chi Minh City, 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, VIETNAM
ABSTRACT
We have successfully demonstrated a facile synthetic route for well-defined three poly(3-hexylthiophene)-block-poly(methyl methacrylate) rod-coil diblock copolymers (P3HT-b-PMMA), P3HT50-b-PMMA16, P3HT50-b-PMMA21, and P3HT50-b-PMMA63 by metal-free atom transfer radical polymerization using pyrene as an organic photocatalyst. Polymerization of methyl methacrylate is efficiently activated with light leading to excellent control over the molecular weight, polydispersity, and compositions of the resulting diblock copolymers. The structure and properties of the resulting P3HT-b-PMMA diblock copolymers were characterized by proton nuclear magnetic resonance, gel permeation chromatography, fourier transform infrared.
