Unveiling Energy Transfer Mechanisms in Nanographene-Incorporated Metal–Organic Frameworks,ACS Materials Letters

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Unveiling Energy Transfer Mechanisms in Nanographene-Incorporated Metal–Organic Frameworks
ACS Materials Letters ( IF 9.6 ) Pub Date : 2024-02-26 , DOI: 10.1021/acsmaterialslett.3c01486
Junghye Lee ₁ , Eunhye Hwang _{1,

2} , Tae In Kim ₁ , Eunji Jin ₁ , Eunchan Cho ₁ , Young S. Park ₁ , Seung Kyu Min _{1,

3} , Tae-Hyuk Kwon _{1,

2,

4} , Wonyoung Choe _{1,

4}

Affiliation

Nanographenes are a class of extended π-conjugated molecules with great potential for photophysical and electrochemical properties. However, most nanographenes show self-aggregation due to their strong π–π interaction, resulting in structures barely possessing any open π surface. We find that metal–organic frameworks (MOFs) can be an ideal platform to construct periodic arrays and pores with isolated large π-conjugated surfaces by avoiding undesired π–π interactions between the nanographene molecules. Here, we report a multivariate series of nanographene-incorporated MOFs, UMOF-2-X, utilizing the graphene-like hexatopic organic linkers, hexaphenylethynylbenzene (HPB) and hexabenzocoronene (HBC), through a mixed-linker strategy. Remarkably, UMOF-2 inhibits the occurrence of linker-to-metal charge transfer to Cu metal and shows efficient energy transfer between HPB and HBC linkers.

中文翻译：

揭示纳米石墨烯金属有机框架中的能量转移机制

纳米石墨烯是一类扩展的π共轭分子，具有巨大的光物理和电化学性能潜力。然而，大多数纳米石墨烯由于其强烈的π-π相互作用而表现出自聚集，导致结构几乎不具有任何开放的π表面。我们发现金属有机框架（MOF）可以成为构建周期性阵列和具有孤立的大π共轭表面的孔的理想平台，避免纳米石墨烯分子之间不需要的π-π相互作用。在这里，我们报告了一系列多元系列的纳米石墨烯掺入的MOF，UMOF-2- X，通过混合连接体策略利用类石墨烯六位有机连接体、六苯基乙炔基苯（HPB）和六苯并晕（HBC）。值得注意的是，UMOF-2 抑制了连接体到金属的电荷转移到铜金属的发生，并显示 HPB 和 HBC 连接体之间的有效能量转移。

更新日期：2024-02-26

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