子场对库巴斯子场的影响 MOF 中的开放铜位点与分子的相互作用:电子结构洞察力
Trang Thuy Nguyen1,2, Hoan Van Tran1, Linh Hoang Nguyen3
1Faculty of Physics, University of Science, Vietnam National University Hanoi Vietnam nguyenthuytrang@hus.edu.vn.
RSC advances
|August 23, 2024
概括
在金属有机框架 (MOF) 中的铜位点的协调环境极大地影响了吸附. 在MFU-4l中的三角形T(CuL3) 协调通过库巴斯相互作用表现出强烈的结,与NU2100.00中的线性L(CuL2) 不同.
科学领域:
- 材料科学 材料科学 材料科学
- 计算化学的计算化学
- 纳米技术纳米技术
背景情况:
- 金属有机框架 (MOF) 是储存的有希望的材料.
- 在MOF中开放的铜位点在 sorption中起着至关重要的作用.
- 了解铜场的电子结构是优化MOF性能的关键.
研究的目的:
- 为了研究各种MOF带协调的开放铜位点上的 sorption.
- 阐明控制结的电子结构机制.
- 为了将协调环境与吸附特性相关联.
主要方法:
- 使用密度函数理论 (DFT) 的计算.
- 在铜中分析了d状态和spd杂交的联体场诱导的分裂.
- 检查电子向前和向后捐赠机制.
主要成果:
- 线性L ((CuL2) 协调显示不适合电子捐赠的空置轨道,阻碍了H2吸附.
- 三角形T ((CuL3) 和轮P ((CuL4) 2) 坐标促进了电子向前捐赠.
- T(CuL3) 呈现出更强的前向捐赠和显著的后向捐赠,导致结合能量为37.6kJ mol-1.
- P(CuL4) 2的结合较弱 (10.6 kJ mol-1),主要是由于静电相互作用.
结论:
- 铜位点的协调环境对于MOF中的 sorption至关重要.
- 有效的结合需要特定的电子配置,使库巴斯相互作用 (前向和后向捐赠) 成为可能.
- 与其他研究的MOF相比,MFU-4l中的T(CuL3) 协调显示出优越的结能力.
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