Ti(III) 在不寻常的环境压力条件下用于CO2/环氧合聚合的催化剂
Ignacio Sancho1, Marta Navarro1, Marc Montilla2
1Departamento de Química Orgánica y Química Inorgánica, Instituto de Investigación Química "Andrés M. del Río" (IQAR), Universidad de Alcalá, Campus Universitario, E-28805 Alcalá de Henares, Madrid, Spain.
Inorganic chemistry
|August 31, 2023
概括
研究人员开发了新的 (III) 化合物,用于小分子功能化. 这些低价值的物种,特别是 (III) орто二胺复合物,作为二氧化碳和环烯环氧化物共聚合的催化剂,具有很高的选择性.
科学领域:
- 有机金属化学 有机金属化学
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
背景情况:
- 低价值化合物是用于小分子功能化的强有力的还原剂.
- 开发高反应性低价值复合物用于生产化学仍然具有挑战性.
- 开发高效的用于二氧化碳利用的催化系统对于可持续化学至关重要.
研究的目的:
- 为了合成和表征新的 (III) ортофенилендиамидо (PDA) 物种.
- 为了研究这些低价值复合物的形成途径.
- 评估合成的 (III) 化合物在二氧化碳共聚合中的催化性能.
主要方法:
- PDA化合物的合成及其与四化的反应.
- 异金属和 (IV) 种的表征.
- 使用三甲基化 ([LiBHEt3]) 减少的前体.
- 密度函数理论 (DFT) 计算以阐明反应机制.
- 对二氧化碳和环烯环氧化物共聚合物的催化试验.
主要成果:
- 成功合成了 (III) 形二胺 (PDA) 的物种[Li (thf) ][Ti (ArPDA) ] .
- 阐明不同复合物的不同形成路径,包括辅助的过程.
- 使用Ti(III) 化合物,证明对CO2和环烯环氧化物共聚合物的高度选择性催化.
- 在温和条件下 (1 bar) 的催化活性和选择性与已建立的Salen-Cr(III) 系统相美.
结论:
- 建立了一个详细的合成路径,以低价值的 (III) ортофениленидиамидо复合物.
- 这些新的Ti(III) 复合体作为有效和有选择性的催化剂,用于二氧化碳利用.
- 这些发现推动了低价值化学领域的发展,并为可持续的聚合物合成提供了有希望的途径.
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