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首页> 外文期刊>Green chemistry >Cu-I anchored onto mesoporous SBA-16 functionalized by aminated 3-glycidyloxypropyltrimethoxysilane with thiosemicarbazide (SBA-16/GPTMS-TSC-Cu-I): a heterogeneous mesostructured catalyst for S-arylation reaction under solvent-free conditions
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Cu-I anchored onto mesoporous SBA-16 functionalized by aminated 3-glycidyloxypropyltrimethoxysilane with thiosemicarbazide (SBA-16/GPTMS-TSC-Cu-I): a heterogeneous mesostructured catalyst for S-arylation reaction under solvent-free conditions

机译：Cu-1固定在由氨化的3-丙酸氧基丙基三甲氧基亚胺脱氧甲酰肼（SBA-16 / GPTMS-TSC-Cu-I）官能化的中孔SBA-16上（SBA-16 / GPTMS-TSC-CU-1）：在无溶剂条件下的S-芳基化反应的非均相型型型催化剂

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摘要

Herein, we report the novel synthesis of Cu-I anchored onto a cage-like mesoporous material (SBA-16), which was successfully functionalized by aminated 3-glycidyloxypropyltrimethoxysilane with thiosemicarbazide (SBA-16/GPTMS-TSC-Cu-I) into an efficient and highly recyclable heterogeneous catalyst. The as-synthesized mesostructured catalyst (SBA-16/GPTMS-TSC-Cu-I) was comprehensively characterized by different techniques, namely, FT-IR, FIR, SAXRD, XRD, XPS, BET, TEM, FE-SEM, EDX, EDX mapping, TGA, ICP-OES, and CHNS analyses. SBA-16 with a unique "super-cage" structure efficiently controlled the formation of dispersed organic and metal species in the mesoporous channels. These confined nanoparticles with a narrow particle size distribution (3-7 nm) exhibited excellent catalytic activity in the S-arylation reaction without necessitating the use of toxic solvents and/or expensive metal catalysts. Interestingly, the mesoporous catalyst was extremely stable under the reaction conditions and could be easily separated by a simple filtration process and reused for at least seven recycle runs (without any appreciable loss in catalytic activity). Due to the inimitable structure of the abovementioned mesostructured catalyst, the C-S coupling products of aryl halides with S-8/thiourea under solvent-free conditions were obtained in good to excellent yields in remarkably reduced reaction times in comparison to those reported in earlier studies.
机译：在此，我们将Cu-1固定在笼状的中孔材料（SBA-16）上的新颖合成，其用氨化的3-丙酸氧基丙基三甲氧基硅烷用硫代胺（SBA-16 / GPTMS-TSC-Cu-I）成功官能化。进入一种高效且高可回收的非均相催化剂。通过不同的技术全面地表征了AS合成的型型型催化剂（SBA-16 / GPTMS-TSC-CU-1），即FT-IR，FIR，SAXRD，XRD，XPS，BET，TEM，FE-SEM，EDX， EDX映射，TGA，ICP-OES和CHN分析。 SBA-16具有独特的“超级笼”结构，有效地控制了中孔通道中分散的有机和金属物种的形成。这些具有窄粒度分布（3-7nm）的狭窄的纳米颗粒在S-芳基化反应中表现出优异的催化活性，而不需要使用毒性溶剂和/或昂贵的金属催化剂。有趣的是，在反应条件下，中孔催化剂非常稳定，并且可以通过简单的过滤过程容易地分离，并重复使用至少七次循环（没有任何明显的催化活性损失）。由于上述型腹腔结构催化剂的不同结构，与早期研究报告的那些相比，获得了在无溶剂条件下与S-8 / Thiourea的芳基卤化物的C-S耦合产物与优异的产率相比，得到了优异的产率。

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