Polythiophene-Encapsulated Bimetallic Au-Fe3O4 Nano-Hybrid Materials: A Potential Tandem Photocatalytic System for Nondirected C(sp2)-H Activation for the Synthesis of Quinoline Carboxylates

Mandeep Kaur; Subhamay Pramanik; Manoj Kumar; Vandana Bhalla

doi:10.1021/acscatal.6b02681

Polythiophene-Encapsulated Bimetallic Au-Fe₃O₄ Nano-Hybrid Materials: A Potential Tandem Photocatalytic System for Nondirected C(sp²)-H Activation for the Synthesis of Quinoline Carboxylates

Mandeep Kaur, Subhamay Pramanik, Manoj Kumar, Vandana Bhalla

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Hetero-oligophenylene derivative 3 appended with thiophene moieties has been designed and synthesized which undergoes aggregation to form J-type fluorescent aggregates in in H₂O/THF (7/3) media. These aggregates served as reactors for the preparation of bimetallic Au-Fe₃O₄ NPs. During the reduction process, aggregates of derivative 3 were oxidized to the polythiophene species 4. Interestingly, the polythiophene species 4, having a fibrous morphology, served as a shape- and morphology-directed template for assembly of bimetallic Au-Fe₃O₄ NPs in a flower-like arrangement. Furthermore, polythiophene-encapsulated bimetallic 4:Au-Fe₃O₄ nanohybrid materials served as an efficient and recyclable catalytic system for C(sp²)-H bond activation of unprotected electron-rich anilines for the construction of synthetically versatile quinoline carboxylates via C-H activation, carbonylation, and subsequent annulation under mild and eco-friendly conditions (aqueous media, room temperature, visible-light irradiation, and aerial conditions).

Original language	English
Pages (from-to)	2007-2021
Number of pages	15
Journal	ACS Catalysis
Volume	7
Issue number	3
DOIs	https://doi.org/10.1021/acscatal.6b02681
State	Published - Mar 3 2017
Externally published	Yes

Funding

V.B. is grateful to the SERB, New Delhi, India (ref no. EMR/2014/000149), for financial support. We are also grateful to the UGC (New Delhi) for the University with Potential for Excellence (UPE) project.

Funders	Funder number
University Grants Committee
Science and Engineering Research Board	EMR/2014/000149

Keywords

C(sp)-H activation
bimetallic Au-FeO nanoflower
hetero-oligophenylene
photocatalyst
polythiophene
quinoline carboxylates

Access to Document

10.1021/acscatal.6b02681

Cite this

@article{8680793b799048bd86dc5b3db4add5ae,

title = "Polythiophene-Encapsulated Bimetallic Au-Fe3O4 Nano-Hybrid Materials: A Potential Tandem Photocatalytic System for Nondirected C(sp2)-H Activation for the Synthesis of Quinoline Carboxylates",

abstract = "Hetero-oligophenylene derivative 3 appended with thiophene moieties has been designed and synthesized which undergoes aggregation to form J-type fluorescent aggregates in in H2O/THF (7/3) media. These aggregates served as reactors for the preparation of bimetallic Au-Fe3O4 NPs. During the reduction process, aggregates of derivative 3 were oxidized to the polythiophene species 4. Interestingly, the polythiophene species 4, having a fibrous morphology, served as a shape- and morphology-directed template for assembly of bimetallic Au-Fe3O4 NPs in a flower-like arrangement. Furthermore, polythiophene-encapsulated bimetallic 4:Au-Fe3O4 nanohybrid materials served as an efficient and recyclable catalytic system for C(sp2)-H bond activation of unprotected electron-rich anilines for the construction of synthetically versatile quinoline carboxylates via C-H activation, carbonylation, and subsequent annulation under mild and eco-friendly conditions (aqueous media, room temperature, visible-light irradiation, and aerial conditions).",

keywords = "C(sp)-H activation, bimetallic Au-FeO nanoflower, hetero-oligophenylene, photocatalyst, polythiophene, quinoline carboxylates",

author = "Mandeep Kaur and Subhamay Pramanik and Manoj Kumar and Vandana Bhalla",

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year = "2017",

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Polythiophene-Encapsulated Bimetallic Au-Fe₃O₄ Nano-Hybrid Materials: A Potential Tandem Photocatalytic System for Nondirected C(sp²)-H Activation for the Synthesis of Quinoline Carboxylates. / Kaur, Mandeep; Pramanik, Subhamay; Kumar, Manoj et al.
In: ACS Catalysis, Vol. 7, No. 3, 03.03.2017, p. 2007-2021.

Research output: Contribution to journal › Article › peer-review

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