Synthesis and spectroscopic properties of some new difluoroboron bis-β-diketonate derivatives

Pi, Yan; Wang, Dun‐Jia; Liu, Hua; Hu, Yanjun; Wei, Xianhong; Zheng, Jun

doi:10.1016/j.saa.2014.04.078

Cited by 26 publications

(7 citation statements)

References 20 publications

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“…59,60 Brønsted acid sites are very important in oxidation catalysis, since the surface acidity, as well as the basic properties, may be responsible for the adsorption/desorption rates of reactants and products, and are a major factor in the activation of hydrocarbons and occurring intermediates. 61 The lowest intensity of OH stretching of the Brønsted acid (3258 cm −1 ) was detected for MEK oxidation on Mn 3 O 4 catalyst at 63,64 and surface carbonate species, 19 respectively. According to the results of TPSR (SI Figure S3), the band of 1586 cm −1 (CO stretching vibrations of β-diketone ligands) stemmed from diacetyl (CH 3 COCOCH 3 ), which was a common reaction intermediate in catalytic oxidation of MEK.…”

Section: Methodsmentioning

confidence: 97%

Sphere-Shaped Mn₃O₄ Catalyst with Remarkable Low-Temperature Activity for Methyl–Ethyl–Ketone Combustion

Pan

Jian

Chen

et al. 2017

Environ. Sci. Technol.

175

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Mn 3 O 4 , FeMnO x , and FeO x catalysts synthesized via a solvothermal method were employed for catalytic oxidation of methyl−ethyl−ketone (MEK) at low temperature. Mn 3 O 4 with sphere-like morphology exhibited the highest activity for MEK oxidation, over which MEK was completely oxidized to CO 2 at 200°C, and this result can be comparable to typical noble metal loaded catalysts. The activation energy of MEK over Mn 3 O 4 (30.8 kJ/mol) was much lower than that of FeMnO x (41.5 kJ/mol) and FeO x (47.8 kJ/mol). The dominant planes, surface manganese species ratio, surface-absorbed oxygen, and redox capability played important roles in the catalytic activities of catalysts, while no significant correlation was found between specific surface area and MEK removal efficiency. Mn 3 O 4 showed the highest activity, accounting for abundant oxygen vacancies, low content of surface Mn 4+ and strong reducibility. The oxidation of MEK to CO 2 via an intermediate of diacetyl is a reaction pathway on Mn 3 O 4 catalyst. Due to high efficiency and low cost, sphere-shaped Mn 3 O 4 is a promising catalyst for VOCs abatement.

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Section: Methodsmentioning

confidence: 97%

Sphere-Shaped Mn₃O₄ Catalyst with Remarkable Low-Temperature Activity for Methyl–Ethyl–Ketone Combustion

Pan

Jian

Chen

et al. 2017

Environ. Sci. Technol.

175

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“…Various types of asymmetric complexes and tunable emissions have been reported. [24][25][26][27][28][29][30][31][32][33][34] Emission colors can be modulated both in the solution and in solid states. In addition, a photo-responsive ketoiminate was obtained using a dithienylethene unit.…”

Section: Building Blocks For Constructing Nanostructures and Supramolmentioning

confidence: 99%

Recent progress of optical functional nanomaterials based on organoboron complexes with β-diketonate, ketoiminate and diiminate

2015

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The synthesis and application of organoboron complexes are a highly relevant topic owng to their unique characteristics. Based on their emissive properties, these complexes have been used to make novel optical materials and devices; boron β-diketonate is a simple and robust organoboron complex. From a series of recent studies, unique and versatile optical properties have been reported. In this review, we introduce the results of primarily recent studies on boron diketonate and related compounds containing polymers and particularly explain their optical properties. Initially, the multi-emission of boron diketonate derivatives and its application to biotechnology are explained. Next, the formation of nanostructures and its emission properties are demonstrated. The modulation of optical properties by mechanical stress is also presented. Finally, recent progress in the development of solid-emissive materials are shown with boron diketonates and their derivatives, which have aggregation-induced emission properties. The versatility of boron diketonates as a building block for the preparation of functional optical materials is the focus of this review.

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“…Here, we designed and synthesized some novel difluoroboron bis-b-diketonate derivatives containing a pyridyl moiety; and we introduced the electron-donating 4-methyl, 4-methoxyl, electron-withdrawing 4-fluoro and 4-chloro groups into the aromatic substituents of the difluoroboron bis-b-diketonates to investigate their spectroscopic and photoluminescence properties. The design is an extension of our previous work and these difluoroboron pyridine-2,6-bis-b-diketonates could be more sensitive chemical sensors as compared to our previous design [16]. In addition, they will have much stronger photoluminescence intensity and higher quantum yield than difluoroboron bdiketonates in our research [17].…”

Section: Introductionmentioning

confidence: 75%

Synthesis, characterization, and photoluminescence properties of difluoroboron complexes with bis-β-diketone ligands

et al. 2015

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Some novel difluoroboron bis-b-diketonates containing a pyridyl moiety were synthesized from diethyl 2,6-pyridinedicarboxylate via Claisen condensation with the corresponding aryl methyl ketones and followed by complexation with boron trifluoride etherate. Their spectroscopic behaviors were studied by FTIR, 1 H NMR, UV-Vis, and fluorescence spectroscopic techniques. The results indicated that difluoroboron bis-b-diketonates exhibited violet or blue fluorescence emission at 428-454 nm under UV illumination in DMSO and possessed high extinction coefficients. It was found that the nature of the substituents at benzene ring in bis-bdiketone ligands had a significant impact on the photoluminescence behaviors of difluoroboron complexes. The complex 5b exhibited the strongest photoluminescence intensity and highest quantum yield (U u = 0.93), due to two strong electrondonating methoxyl moieties in molecule and the compound 4b displayed the lowest photoluminescence intensity and quantum yield, assigned to the heavy atom effect of the chlorine atom in its molecule. The photoluminescence intensity and quantum yield of these difluoroboron complexes decreased in the sequence, 5b [ 2b [ 1b [ 3b [ 4b.

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Synthesis and spectroscopic properties of some new difluoroboron bis-β-diketonate derivatives

Cited by 26 publications

References 20 publications

Sphere-Shaped Mn₃O₄ Catalyst with Remarkable Low-Temperature Activity for Methyl–Ethyl–Ketone Combustion

Sphere-Shaped Mn₃O₄ Catalyst with Remarkable Low-Temperature Activity for Methyl–Ethyl–Ketone Combustion

Recent progress of optical functional nanomaterials based on organoboron complexes with β-diketonate, ketoiminate and diiminate

Synthesis, characterization, and photoluminescence properties of difluoroboron complexes with bis-β-diketone ligands

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Synthesis and spectroscopic properties of some new difluoroboron bis-β-diketonate derivatives

Cited by 26 publications

References 20 publications

Sphere-Shaped Mn3O4 Catalyst with Remarkable Low-Temperature Activity for Methyl–Ethyl–Ketone Combustion

Sphere-Shaped Mn3O4 Catalyst with Remarkable Low-Temperature Activity for Methyl–Ethyl–Ketone Combustion

Recent progress of optical functional nanomaterials based on organoboron complexes with β-diketonate, ketoiminate and diiminate

Synthesis, characterization, and photoluminescence properties of difluoroboron complexes with bis-β-diketone ligands

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Sphere-Shaped Mn₃O₄ Catalyst with Remarkable Low-Temperature Activity for Methyl–Ethyl–Ketone Combustion

Sphere-Shaped Mn₃O₄ Catalyst with Remarkable Low-Temperature Activity for Methyl–Ethyl–Ketone Combustion