Syntheses and Structural Characterization of Lithium Carboxylate Frameworks and Guest-Dependent Photoluminescence Study

详细信息    查看全文

• 作者：Sokhrab B. Aliev ; Denis G. Samsonenko ; Mariana I. Rakhmanova ; Danil N. Dybtsev ; Vladimir P. Fedin
• 刊名：Crystal Growth & Design
• 出版年：2014
• 出版时间：September 3, 2014
• 年：2014
• 卷：14
• 期：9
• 页码：4355-4363
• 全文大小：523K
• ISSN：1528-7505

文摘

Five novel 3D lithium鈥搊rganic frameworks, [Li₂(H₂pml)]路C₄H₈O₂ (1, H₄pml = 1,2,4,5-benzenetetracarboxylic or pyromellitic acid), [Li₂(H₂pml)] (2), [Li(H₂tatab)]路5H₂O (3, H₃tatab = 4,4鈥?4鈥?s-triazine-1,3,5-triyltri-p-aminobenzoic acid), [Li₁₁(H₃O)(H₂O)₅(Html)₆]路8C₄H₈O₂ (4, H₃tml = 1,2,4-benzenetricarboxylic or trimellitic acid), and [Li{Li(nmp)}{Li(H₂O)(nmp)}{Li(nmp)₂}₂(H₂tms)(Htms)₂]路NMP路EtOH (5, H₃tms = 1,3,5-benzenetricarboxylic or trimesic acid, nmp = 1-methyl-2-pyrrolidinone), were synthesized by solvothermal methods and characterized by single crystal X-ray diffraction, powder X-ray diffraction (PXRD), IR spectroscopy, and thermogravimetric analyses (TGA). Compounds 1 and 2 feature the same framework composition but different guest-controlled structures and topology. Compound 4 consists of a unique undecanuclear Li carboxylate complex {Li₁₁(H₂O)₅(RCOO)₁₈} and contains pores with diameter 7 脜. Furthermore, compound 4 demonstrates highly pronounced guest-dependent photoluminescence behavior: nitrobenzene completely quenches the light emission, while toluene enhances it.