Green conversion of citral and citronellal using tris(bipyridine)ruthenium(II)-supported saponite catalyst under microwave irradiation

Fatimah, Is; Rubiyanto, Dwiarso; Prakoso, Nurcahyo Iman; Yahya, Amri; Sim, Yoke‐Leng

doi:10.1016/j.scp.2019.01.001

Cited by 13 publications

(8 citation statements)

References 34 publications

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“…The band at 1633 cm −1 is attributed to the bending vibration of -OH. The band at 980 cm − 1 was assigned to the Si-O-Si stretching (Tao et al, 2016;Fatimah et al, 2019). Several new bands at 2925, 2853, 1488 and 1473 cm -1 , which were assigned to the characteristic vibrations of CTAB alkyl chain, emerged in the FTIR spectrum of CTAB-Sap, demonstrating the presence of organic molecules.…”

Section: Resultsmentioning

confidence: 97%

Saponite-anthocyanin derivatives: The role of organoclays in pigment photostability

Lima

Silva

Silva-Filho

et al. 2020

Applied Clay Science

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Hybrid pigments based on organo-saponite (cetyltrimethyl ammonium bromide (CTAB-Sap) and a commercial anthocyanin (ACN) dye, Crystal Red Grape, were prepared. The interactions between organic dye guest and hosts (including saponite and organo-saponite) were investigated by X-ray diffraction, transmission electron microscopy and Fourier transform infrared spectroscopy. The pigments exhibit different colors function of their host-guest interactions. The blue color of organo-clay-anthocyanin indicates the stabilization of quinoidal base form of the dye. The hybrids have good stability against visible light irradiation and basic pH conditions. These dyed materials are environmentally friendly and can be promising candidates in different application fields.

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Section: Resultsmentioning

confidence: 97%

Saponite-anthocyanin derivatives: The role of organoclays in pigment photostability

Lima

Silva

Silva-Filho

et al. 2020

Applied Clay Science

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“…The band at 1633 cm −1 is attributed to -OH water bending. The band at 980 cm − 1 was assigned to the Si-O-Si stretching [4,56].…”

Section: Ftirmentioning

confidence: 99%

“…However, in the last few decades, the efforts of producing dyes providing long-lasting coloring effect comes at the cost of complex organic structures and hazardous effects, reviving the age-old quest of humankind for natural resources, since the conventional uses of synthetic dyes have posed serious threat to global environment. In this way, the demand for eco-friendly products is switching the trend of using synthetic dyes over the use of naturally occurring colorants [3,4].…”

Section: Introductionmentioning

confidence: 99%

Saponite-anthocyanin pigments: Slipping between the sheets

Lima

Castro-Silva

Silva-Filho

et al. 2020

Microporous and Mesoporous Materials

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The present work describes the synthesis and characterization of hybrid materials based on β-cyclodextrin (β-CD) and cetyltrimethylammonium bromide (CTAB) intercalated into saponite (SAP) and a commercially available powder of anthocyanin dye, Crystal Red Grape (RG). The interactions between the organic dye guest and the organo-clay host were investigated by X-ray diffraction, thermogravimetric analysis, transmission electronic microscopy and 13 C solid state nuclear magnetic resonance. The results support complex formation between β-CD and CTAB, their intercalation into the clay interlayer spaces or surface loading, and their interaction with RG (CTAB_SAP-RG, β-CD_SAP-RG and β-CD+CTAB_SAP-RG).The hybrid pigments formed exhibit different colors, enhanced stability against visible light irradiation and basic pH conditions. These hybrid pigments are environmentally friendly and can be promising candidates in different application fields.

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“…Particularly, the hydrogenation rate was insigni cantly in uenced by the increasing particle size, for example, in the Ru-deposited material on MCM-41 (Vajglová et al, 2020) , and Pt-Ga-MCM-41 (Balu et al, 2010) . The nanoparticles formed from active metals demonstrated a highly stable catalytic activity, as represented by better reusability (Balu et al, 2010;Fatimah et al, 2019). Heterogeneous catalysts suitable for the cyclization reaction of citronellal-enes must have strong Lewis acids and weak Bronsted acids (Chuah et al, 2001) .…”

Section: Citronellal Conversion Into Isopule-golmentioning

confidence: 99%

“…The hydrophobicity of the complex provides the possibility of acidity transfer as demonstrated by the activity in a non-solvent reaction system. The anchored metal complex in the support is remarkably maintained for 5 uses in its recycling activity (Fatimah et al, 2019) .…”

Section: Clay-based Heterogeneous Catalystsmentioning

confidence: 99%

Heterogeneous Catalytic Conversion of Citronellal into Isopulegol and Menthol: Literature Review

Yahya

Rubiyanto

Fatimah

2021

sci. technol. indones.

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The conversion of citronellal into isopulegol is a key route in the production of a number of important chemicals. In the perspective of green conversion, the use of a heterogeneous catalyst is superior due to its ease in separation and reusability, so it facilitates a highly economical conversion. In this review, we examine the use of some transition metals in cyclization reactions, which are suitable for citronellal conversion into isopulegol, and consider the potential progress in clay-based catalysts. The structure of clay which potentially provides the porosity by modification and supporting active metal is proposed to be the low-cost catalyst for the conversion. As other mechanism by porous materials-supported metal, the porosity of clay support contributes to conduct thesurface adsorption mechanism and the Broensted acid supply, meanwhile the metal acts as active site for cyclization, and in the one-pot conversion into menthol, as both cyclization and hydrogenation.

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Green conversion of citral and citronellal using tris(bipyridine)ruthenium(II)-supported saponite catalyst under microwave irradiation

Cited by 13 publications

References 34 publications

Saponite-anthocyanin derivatives: The role of organoclays in pigment photostability

Saponite-anthocyanin derivatives: The role of organoclays in pigment photostability

Saponite-anthocyanin pigments: Slipping between the sheets

Heterogeneous Catalytic Conversion of Citronellal into Isopulegol and Menthol: Literature Review

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