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Saikia S, Devi R, Gogoi P, Saikia L, Choudary BM, Raja T, Deka P, Deka RC. Regioselective Friedel-Crafts Acylation Reaction Using Single Crystalline and Ultrathin Nanosheet Assembly of Scrutinyite-SnO 2. ACS OMEGA 2022; 7:32225-32237. [PMID: 36120068 PMCID: PMC9476169 DOI: 10.1021/acsomega.2c03555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Peculiar physicochemical properties of two-dimensional (2D) nanomaterials have attracted research interest in developing new synthetic technology and exploring their potential applications in the field of catalysis. Moreover, ultrathin metal oxide nanosheets with atomic thickness exhibit abnormal surficial properties because of the unique 2D confinement effect. In this work, we present a facile and general approach for the synthesis of single crystalline and ultrathin 2D nanosheets assembly of scrutinyite-SnO2 through a simple solvothermal method. The structural and compositional characterization using X-ray diffraction (Rietveld refinement analysis), high-resolution transmission electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and so on reveal that the as-synthesized 2D nanosheets are ultrathin and single crystallized in the scrutinyite-SnO2 phase with high purity. The ultrathin SnO2 nanosheets show predominant growth in the [011] direction on the main surface having a thickness of ca. 1.3 nm. The SnO2 nanosheets are further employed for the regioselective Friedel-Crafts acylation to synthesize aromatic ketones that have potential significance in chemical industry as synthetic intermediates of pharmaceuticals and fine chemicals. A series of aromatic substrates acylated over the SnO2 nanosheets have afforded the corresponding aromatic ketones with up to 92% yield under solvent-free conditions. Comprehensive catalytic investigations display the SnO2 nanosheet assembly as a better catalytic material compared to the heterogeneous metal oxide catalysts used so far in the view of its activity and reusability in solvent-free reaction conditions.
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Affiliation(s)
- Sudakhina Saikia
- Department
of Chemical Sciences, Tezpur University, Napaam, Tezpur 784028, India
| | - Rasna Devi
- Department
of Chemical Sciences, Tezpur University, Napaam, Tezpur 784028, India
| | - Pranjal Gogoi
- Catalysis
and Inorganic Chemistry Division, CSIR-National
Chemical Laboratory, Pune 411008, India
| | - Lakshi Saikia
- Materials
Sciences and Technology Division, CSIR-North
East Institute of Science and Technology, Jorhat 785006, India
| | | | - Thirumalaiswamy Raja
- Catalysis
and Inorganic Chemistry Division, CSIR-National
Chemical Laboratory, Pune 411008, India
| | - Pangkita Deka
- Department
of Chemical Sciences, Tezpur University, Napaam, Tezpur 784028, India
- Department
of Chemistry, Jorhat Engineering College, Garmur, Jorhat 785007, India
| | - Ramesh C. Deka
- Department
of Chemical Sciences, Tezpur University, Napaam, Tezpur 784028, India
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Prakash GS, Paknia F, Kulkarni A, Narayanan A, Wang F, Rasul G, Mathew T, Olah GA. Taming of superacids: PVP-triflic acid as an effective solid triflic acid equivalent for Friedel–Crafts hydroxyalkylation and acylation. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2014.08.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Venkatesha N, Chandrashekara B, Jai Prakash B, Bhat Y. Active and deactive modes of modified montmorillonite in p-cresol acylation. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.05.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Bejblová M, Procházková D, Vlk J. Acylations with Long-Chain Acid Anhydrides and Acyl Chlorides over Zeolite Beta. Top Catal 2008. [DOI: 10.1007/s11244-008-9142-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Bejblová M, Vlk J, Procházková D, Šiklová H, Čejka J. The Effect of Type of Acid Sites in Molecular Sieves on Activity and Selectivity in Acylation Reactions. ACTA ACUST UNITED AC 2007. [DOI: 10.1135/cccc20070728] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The role of the type of acid site (Broensted vs. Lewis) on the activity and selectivity of molecular sieve catalysts was investigated in ferrocene and toluene acylation. H-, Zn-, Fe-, Al- and La-forms of zeolite Beta, USY and mesoporous molecular sieves (Al)MCM-41, (Al)SBA-15 were tested. It was observed that addition of metal cations acting as Lewis acid sites can increase the acidity of various molecular sieve catalysts. No general relationship between the type of cation and conversion of individual substrate was found. While the highest activity in ferrocene acylation was observed after addition of Zn, in the case of toluene acylation Al-forms of catalysts were the most active. The results indicate that the acid strength of cationic Lewis sites controls their activity in acylation reactions.
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Zeolites for preparation of acylferrocenes. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/s0167-2991(07)80968-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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