Zhang Mei-Li, Zhai Zhi-Min, Yang Xiao-Gang, Huang Ya-Dan, Zheng Yan-Jin, Ma Lu-Fang
Laboratory of New Energy and New Function Materials, Department of Chemistry and Chemical Engineering, Yan'an University, Yan'an, China.
Henan Province Function-Oriented Porous Materials Key Laboratory, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, China.
Front Chem. 2020 Nov 11;8:593948. doi: 10.3389/fchem.2020.593948. eCollection 2020.
The development of metal-organic framework (MOF) based room-temperature phosphorescence (RTP) materials has raised extensive concern owing to their widespread applications in the field of anti-counterfeiting, photovoltaics, photocatalytic reactions, and bio-imaging. Herein, one new binuclear Mn(II) based 3D MOF [Mn(L)(BMIB)·(HO)] () (HL = 3,5-bis(3,5-dicarboxylphenxoy) benzoic acid, BMIB = tran-4-bis(2-methylimidazolyl)butylene) has been synthesized by a facile hydrothermal process. In , the protonated BMIB cations show infinite π-stacking arrangement, residing in the channels of the 3D network extended by L ligand and binuclear Mn(II) units. The orderly and uniform host-guest system at molecular level emits intense white light fluorescence and long-lived near infrared phosphorescence under ambient conditions. These photophysical processes were well-studied by density functional theory (DFT) calculations. Photoelectron measurements reveal high photoelectron response behavior and incident photon-to-current efficiency (IPCE).
基于金属有机框架（MOF）的室温磷光（RTP）材料的发展因其在防伪、光伏、光催化反应和生物成像领域的广泛应用而引起了广泛关注。在此，通过简便的水热法合成了一种新型的基于双核Mn（II）的三维MOF [Mn（L）（BMIB）·（H₂O）]（）（HL = 3,5-双（3,5-二羧基苯氧基）苯甲酸，BMIB =反式-4-双（2-甲基咪唑基）丁烯）。在该材料中，质子化的BMIB阳离子呈现出无限的π堆积排列，存在于由L配体和双核Mn（II）单元扩展的三维网络的通道中。在环境条件下，分子水平上有序且均匀的主客体系统发出强烈的白色荧光和长寿命的近红外磷光。通过密度泛函理论（DFT）计算对这些光物理过程进行了深入研究。光电子测量揭示了高光电子响应行为和入射光子到电流效率（IPCE）。
