Zhao Xin, Qin Bing-Bing, He Tao, Wang Hai-Ping, Liu Jiewei
School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P.R. China.
Inorg Chem. 2023 Nov 13;62(45):18553-18562. doi: 10.1021/acs.inorgchem.3c02785. Epub 2023 Oct 31.
A pyrene-based metal-organic framework, Cd(PTTB)(HO) (WYU11), was synthesized from the tetracarboxylic pyrene ligand HPTTB (HPTTB = 1,3,6,8-tetrakis(3-carboxyphenyl)pyrene) and Cd(NO)4HO. Powder X-ray diffraction analysis discloses that the framework is stable in acid, base, and various organic solvent environments. WYU-11 shows excellent catalytic performance on the cyclization reaction of propargylic amines with CO into 2-oxazolidinones under mild conditions (60 °C, atmospheric CO). H NMR studies unveiled that WYU-11 and 1,1,3,3-tetramethylguanidine (TMG) can synergistically activate the propargylic amine substrate and promote the reaction. Importantly, WYU-11 represents a rare example of noble metal-free heterogeneous catalyst that can catalyze the cyclization of CO with propargylic amines. In addition, by virtue of the excellent water stability and luminescence properties, WYU-11 shows excellent detection performance for sulfathiazole (STZ) and ornidazole (ODZ) in water. Investigation reveals that the coexistence of photoinduced electron transfer and internal filtering effect could reasonably explain the luminescence quenching of WYU-11 by the antibiotics.
一种基于芘的金属有机框架材料Cd(PTTB)(H₂O)（WYU-11），是由四羧酸芘配体H₄PTTB（H₄PTTB = 1,3,6,8-四(3-羧基苯基)芘）和Cd(NO₃)₂·4H₂O合成的。粉末X射线衍射分析表明，该框架在酸、碱和各种有机溶剂环境中都很稳定。WYU-11在温和条件（60℃，常压CO₂）下，对炔丙胺与CO₂环化生成2-恶唑烷酮的反应表现出优异的催化性能。¹H NMR研究表明，WYU-11和1,1,3,3-四甲基胍（TMG）可以协同激活炔丙胺底物并促进反应。重要的是，WYU-11是一种罕见的无贵金属多相催化剂的例子，它可以催化CO₂与炔丙胺的环化反应。此外，凭借其优异的水稳定性和发光性能，WYU-11在水中对磺胺噻唑（STZ）和奥硝唑（ODZ）表现出优异的检测性能。研究表明，光致电子转移和内滤效应的共存可以合理解释抗生素对WYU-11的发光猝灭。
