Two Schiff-base complexes of cadmium and manganese on modified MCM-41 as practical, recyclable and selective nanocatalysts for the synthesis of sulfoxides

Jabbari, Arida; Nikoorazm, Mohsen; Moradi, Parisa

doi:10.1007/s10934-023-01427-1

Cited by 23 publications

(17 citation statements)

References 39 publications

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“…TGA diagram of Nd-bis(PYT)-@boehmite NPs shows small weight losses (5 % of weight) before 150 °C, which is dependent on the evaporated solvents. [77,78] As shown, no other weight loss was observed up to 250 °C, which illustrated excellent thermal stability of Ndbis(PYT)@boehmite NPs. Therefore Nd-bis(PYT)@boehmite NPs can be employed as catalyst in a wide range of organic reactions with hard conditions.…”

Section: Results (Sample Title Optional)mentioning

confidence: 58%

“…Therefore, TGA analysis of Nd‐bis(PYT)@boehmite NPs was performed (Figure 6). TGA diagram of Nd‐bis(PYT)@boehmite NPs shows small weight losses (5 % of weight) before 150 °C, which is dependent on the evaporated solvents [77,78] . As shown, no other weight loss was observed up to 250 °C, which illustrated excellent thermal stability of Nd‐bis(PYT)@boehmite NPs.…”

Section: Resultsmentioning

confidence: 69%

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A New Neodymium Complex on Boehmite Nanoparticles with 1,3‐Bis(pyridine‐3‐ylmethyl)thiourea as a Practical and Reusable Nanocatalyst for the Chemoselective Synthesis of Tetrazoles

2023

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In first part, boehmite nanoparticles were synthesized using aqueous solutions of NaOH and Al(NO 3 ) 3 ⋅ 9H 2 O. Then, it surface was modified by 3-choloropropyltrimtoxysilane, and further 1,3-bis(pyridin-3-ylmethyl)thiourea was anchored on the modified boehmite nanoparticles. In the final step, a neodymium complex was stabilized on its surface (Nd-bis(PYT)@boehmite NPs). The obtained nanoparticles were characterized by TGA, BET, ICP, EDS, WDX, SEM, and XRD techniques. In the second part, Nd-bis(PYT)@boehmite NPs were employed as an efficient, recoverable, and organic-inorganic hybrid nanocatalyst in the homo-selective synthesis of tetrazole compounds. The chemoselectivity of Nd-bis(PYT)@boehmite NPs was studied in the [3 + 2] cycloaddition of phthalonitrile and sodium azide (NaN 3 ). This catalyst is stable and has heterogeneous nature therefore it can be recovered and used again for several consecutively run without any re-activation [a] Dr.

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Section: Results (Sample Title Optional)mentioning

confidence: 58%

Section: Resultsmentioning

confidence: 69%

A New Neodymium Complex on Boehmite Nanoparticles with 1,3‐Bis(pyridine‐3‐ylmethyl)thiourea as a Practical and Reusable Nanocatalyst for the Chemoselective Synthesis of Tetrazoles

2023

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“…This change is assigned to the coordination of s -methyl isothiouronium with Ni nanoparticles. 36,61,64 This result indicates that the Ni nanoparticles were successfully immobilized on KIT-6.…”

Section: Resultsmentioning

confidence: 80%

“…5), the weight decrease from 35 °C to 200 °C can be assigned to the removal of adsorbed organic solvents and water in the mesoporous materials. 60,61 The weight loss observed in the temperature range of 200 °C to 700 °C can be attributed to the disintegration of the immobilized organic compounds. These results indicate that the organic groups have been successfully stabilized on the KIT-6 surface.…”

Section: Thermogravimetric Analysis Studiesmentioning

confidence: 99%

Immobilization of Ni(ii) complex on the surface of mesoporous modified-KIT-6 as a new, reusable and highly efficient nanocatalyst for the synthesis of tetrazole and pyranopyrazole derivatives

et al. 2023

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“…Multiple re‐uses of the catalyst based on mesoporous silica are possible without significantly reducing its catalytic effectiveness 19 . Silanol sites on the surface of mesoporous silica can be functionalized with a variety of substances that contain active sites, 20 such as amine, 21–23 halogen, 5 mercaptans, 24 which can be modified with a variety of ligands and complexes, e.g. Schiff base metal complexes 25–27 .…”

Section: Introductionmentioning

confidence: 99%

The new Schiff‐base complex of copper(II) grafted on mesoporous KIT‐6 as an effective nanostructure catalyst for the homoselective synthesis of various tetrazoles

Akbari,

Nikoorazm,

Tahmasbi

et al. 2023

Applied Organom Chemis

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In this work, KIT‐6 mesoporous silica material was used to create heterogeneous catalyst due to its excellent surface area, substantial pore volume, and highly functionalized surface. A copper(II) Schiff‐base complex was fabricated on the surface of KIT‐6. For this purpose, (3‐iodopropyl)trimethoxysilane (IPTMS) was synthesized as a linker from (3‐choloropropyl)trimethoxysilane through a simple SN2 reaction using NaI. On the other hand, ligand (a) was synthesized from condensation of diethylenetriamine (DETA) and salicylaldehyde (SA), which was identified by IR and 1H‐NMR techniques. In order to, prepare Sal(PMeOSi)DETA (b), ligand (a) was reacted with IPTMS. One of the challenges of this synthesis was to prove the linkage between the ligand (a) and the IPTMS, which was proved by 1H‐NMR technique. In the next step, the Schiff base complex of copper(Cu(II)[Sal(PMeOSi)DETA]) (c) was synthesized using a complexation reaction of Cu(NO3)2.3 H2O and b. Finally, the obtained copper complex was fixed on KIT‐6, {Cu(II)[Sal(PMeOSi)DETA]} as the new reusable and practical catalyst. This catalyst has been identified using IR, BET, EDS, XRD, SEM, and TGA methods and employed in the synthesis of different tetrazoles for the first time. All tetrazoles were prepared with high yields, and good TOF and TON values, indicating excellent catalytic performance. This catalyst shows excellent homoselectivity in the synthesis of five‐substituted 1H‐tetrazoles. Also, it can be recovered and reused several times without a significant decrease in its catalytic activity or copper leaching.

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Two Schiff-base complexes of cadmium and manganese on modified MCM-41 as practical, recyclable and selective nanocatalysts for the synthesis of sulfoxides

Cited by 23 publications

References 39 publications

A New Neodymium Complex on Boehmite Nanoparticles with 1,3‐Bis(pyridine‐3‐ylmethyl)thiourea as a Practical and Reusable Nanocatalyst for the Chemoselective Synthesis of Tetrazoles

A New Neodymium Complex on Boehmite Nanoparticles with 1,3‐Bis(pyridine‐3‐ylmethyl)thiourea as a Practical and Reusable Nanocatalyst for the Chemoselective Synthesis of Tetrazoles

Immobilization of Ni(ii) complex on the surface of mesoporous modified-KIT-6 as a new, reusable and highly efficient nanocatalyst for the synthesis of tetrazole and pyranopyrazole derivatives

The new Schiff‐base complex of copper(II) grafted on mesoporous KIT‐6 as an effective nanostructure catalyst for the homoselective synthesis of various tetrazoles

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