Nano-silica supported acidic ionic liquid as an efficient catalyst for the multi-component synthesis of indazolophthalazine-triones and bis-indazolophthalazine-triones

Safaei, Shirin; Mohammadpoor‐Baltork, Iraj; Khosropour, Ahmad Reza; Moghadam, Majid; Tangestaninejad, Shahram; Mirkhani, Valiollah

doi:10.1039/c3cy00344b

Cited by 53 publications

(24 citation statements)

References 35 publications

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“…This modification led to highly distinct silica xerogel morphologies dependent on the IL anion, forming compact lamellar monoliths with the [MeSO 3 ] anion, free flowing powders when using the [BF 4 ] anion and porcelain-like aggregates while applying the [PF 6 ] anion [33]. This class of materials can be explored in fields like electrochemistry [34], catalysis [35] and nanocomposites. Both the ex situ melt blending of IL-silica xerogel hybrids with thermoplastics [36] and the in situ formation of IL-silica-thermosetting polymer nanocomposites [37] significantly improve thermo-mechanical properties of polymer matrices.…”

Section: Introductionmentioning

confidence: 97%

Ionic liquids as dynamic templating agents for sol–gel silica systems: synergistic anion and cation effect on the silica structured growth

Donato

Lavorgna

et al. 2015

J Sol-Gel Sci Technol

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This work presents a detailed investigation about the influence of a complementary set of imidazolium ionic liquids ([NTf 2 ]) in the preparation of hydrolytic sol-gel silica wet gels and xerogels, providing insights into their hierarchical structures, morphologies of primary particles and aggregation domains. The reported IL decreased dramatically the gelation time (up to *500 times), evolving the systems to transparent or opalescent wet gels with distinct consistencies, or silica powders. Characterization of the obtained silica xerogels was performed by transmission and scanning electron microscopy, atomic force microscopy, X-ray diffraction, small-angle X-ray scattering and thermogravimetric analysis. In general, the IL allowed controlling the silica particle size, color, compactness, structures and morphology. The xerogels showed homogenous and ordered structures (spherical or triangular) of different sizes and with distinct microporosities, depending on the IL applied. These results highlight the key role of IL in the sol-gel silica synthesis with controlled properties, which can be further tuned for specific applications by changing small process parameters.Electronic supplementary material The online version of this article (

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Section: Introductionmentioning

confidence: 97%

Ionic liquids as dynamic templating agents for sol–gel silica systems: synergistic anion and cation effect on the silica structured growth

Donato

Lavorgna

et al. 2015

J Sol-Gel Sci Technol

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“…These materials constitute a new family of thermally-resistant structurally-ordered solids that can be exploited in areas like electrochemistry [21,91,92], catalysis [93,94], biocatalysis, optics, sensors [85], electrorheological fluids [95][96][97] and nanocomposites preparation [4,[6][7][8][9]11]. …”

Section: Colloids Interfacesmentioning

confidence: 99%

Recent Applications of Ionic Liquids in the Sol-Gel Process for Polymer–Silica Nanocomposites with Ionic Interfaces

Donato

Matějka

Mauler

et al. 2017

Colloids and Interfaces

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Abstract:Understanding the organic-inorganic interphases of hybrid materials allows structure and properties control for obtaining new advanced materials. Lately, the use of ionic liquids (ILs) and poly(ionic liquids) (PILs) allowed structure control from the first sol-gel reaction steps due to their anisotropy and multiple bonding capacity. They also act as multifunctional compatibilizing agents that affect the interfacial interactions in a molecular structure-dependent manner. Thus, this review will explore the concepts and latest efforts to control silica morphology using processes such as the sol-gel, both in situ and ex situ of polymer matrices, pre-polymers or polymer precursors. It discusses how to control the polymer-filler interphase bonding, highlighting the last achievements in the interphase ionicity control and, consequently, how these affect the final nanocomposites providing materials with barrier, shape-memory and self-healing properties.

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“…The peaks at 1576 and 1635 cm − 1 can be assigned to C_N and C_C bands of the attached imidazolium ring. Additional bands at 3159, 2948 and 1461 cm −1 were due to C-H stretching and deformation vibrations, confirming the functionalization of the material with the ionic liquid [30]. The absorption of the S_O asymmetric stretching mode appeared at 1170 cm −1 and its symmetric stretching mode lie in 1060 cm −1 , so the broad band around 1046 cm − 1 can be assigned to the stretching modes of Si-O and S_O bands which are overlapped together.…”

Section: Ir Analysismentioning

confidence: 63%

One-pot synthesis of 4,4ʹ-(arylmethylene)-bis-(3-methyl-1-phenyl-1H-pyrazol-5-ols) catalyzed by Brönsted acidic ionic liquid supported on nanoporous Na+-montmorillonite

Shirini

Seddighi

Mazloumi

et al. 2015

Journal of Molecular Liquids

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Nano-silica supported acidic ionic liquid as an efficient catalyst for the multi-component synthesis of indazolophthalazine-triones and bis-indazolophthalazine-triones

Cited by 53 publications

References 35 publications

Ionic liquids as dynamic templating agents for sol–gel silica systems: synergistic anion and cation effect on the silica structured growth

Ionic liquids as dynamic templating agents for sol–gel silica systems: synergistic anion and cation effect on the silica structured growth

Recent Applications of Ionic Liquids in the Sol-Gel Process for Polymer–Silica Nanocomposites with Ionic Interfaces

One-pot synthesis of 4,4ʹ-(arylmethylene)-bis-(3-methyl-1-phenyl-1H-pyrazol-5-ols) catalyzed by Brönsted acidic ionic liquid supported on nanoporous Na+-montmorillonite

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