- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Highly Photostable and Fluorescent Microporous Solids Prepared via Solid-state Entrapment of BODIPY Dyes in a Nascent Metal-Organic Framework
摘要： We report a strategy to synthesize highly emissive, photostable, microporous materials by solid-state entrapment of boron dipyrromethene (BODIPY) fluorophores in a metal-organic framework. Solvent-free mechanochemistry or accelerated aging enabled quantitative capture and dispersal of the PM605 dye within the ZIF-8 framework starting from inexpensive, commercial materials. While the design of emissive BODIPY solids is normally challenged by quenching in a densely-packed environment, herein reported PM605@ZIF-8 materials show excellent emissive properties and to the best of our knowledge an unprecedented ~10-fold enhancement of BODIPY photostability. Time-resolved and steady-state fluorescence studies of PM605@ZIF-8 show that interchromophore interactions are minimal at low dye loadings, but at higher ones through-pore energy transfer between chromophores and to aggregate species lead to quenching.
关键词： fluorescence,metal-organic framework,photostability,BODIPY,microporous materials
更新于2025-09-23 15:21:21
-
A triazine-based metal-organic framework with solvatochromic behaviour and selectively sensitive photoluminescent detection of nitrobenzene and Cu2+ ions
摘要： A novel porous triazine-based metal-organic framework, ([Cd (Ligand)]·2DMF) (1) with strong luminescence, has been constructed via multi-carboxyl ligand 5,5',5''-((1,3,5-triazine-2,4,6-triyl)tris(azanediyl))tris(3-methylbenzoic acid) under solvothermal conditions. Structural analysis revealed that MOF1 has a three-dimensional (3D) framework which is crystallized in the monoclinic system bearing C2/c space group. The high chemical and thermal stability of synthesized MOF1 has been predicted by powder X-ray diffraction and thermogravimetric analysis techniques. Higher selectivity and sensitivity of MOF1 towards Cu2+ ions is remarkable with an adsorption capacity of 90.5 mg/g compared with Mg2+, Mn2+, Ni2+, Co2+, Zn2+, Fe2+ and Cr3+ ions. Results reveal that strong emission of MOF1 can be quenched effectively by a trace amount of copper (3 ppm) and nitrobenzene (0.6 ppm), even in the vapor phase. The extraordinary solvatochromic phenomenon of MOF1 is observed by incorporating acetonitrile guest molecules due to host-guest interactions provided by the carboxyl groups of ligand and imino triazine backbone. Thus, owing to the highly selective and sensitive quenching effect in fluorescence and solvatochromic behavior, MOF1 can be used as a potential sensor for Cu2+, NB, and acetonitrile.
关键词： Selective adsorption,Nitro explosives,Metal-organic frameworks,Luminescence based sensors,Microporous materials
更新于2025-09-10 09:29:36