三功能发光3D微孔MOF，具有用于CO2分离，金属离子的选择性传感和小的有机分子识别的潜力。,European Journal of Inorganic Chemistry

当前位置： X-MOL 学术 › Eur. J. Inorg. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

三功能发光3D微孔MOF，具有用于CO2分离，金属离子的选择性传感和小的有机分子识别的潜力。
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2018-06-19 , DOI: 10.1002/ejic.201800336
Santanu Chand ₁ , Arun Pal ₁ , Shyam Chand Pal ₁ , Madhab C. Das ₁

Affiliation

3D微孔发光金属-有机骨架{[Zn（oba）（L）_0.5 ] · dma} _n（IITKGP- 9，IITKGP代表印度理工学院Kharagpur； L = 3,3'-偶氮二吡啶，H ₂ oba =通过使用带有未开发的偶氮官能化的N，N'间隔基的弯曲有机接头合成具有一维菱形通道的4,4'-氧二苯甲酸）。的金属-有机骨架（MOF）表现出对CO的高选择性吸附潜力₂与CO的优良的选择性₂从CO ₂ / N ₂（291在273K和118在295 K）和CO ₂ / CH ₄如理想吸附溶液理论（IAST）计算所示，在1 bar的压力下（273K下为17.5，在295 K下为4.8）。这样高的分离能力，尤其是在273K为CO ₂ / N ₂，可以归因于微孔（5.8×6.6埃²）此MOF和被吸附的CO的增强的相互作用的性质₂分子与官能偶氮基装饰毛孔通道。在310 nm激发时，此MOF在374 nm高发射。通道中暴露的游离偶氮基团充当功能位点，用于通过荧光猝灭感测金属离子和识别有机小分子。荧光测量表明，该MOF可以选择性地感测Fe ³⁺并以高灵敏度检测有毒的硝基甲烷。本文介绍了通过能量分散X射线光谱和Fe ³⁺负载的MOF材料的粉末XRD分析进行元素映射，可回收性测试以及合理的淬灭机理。因此，该MOF展示了作为三功能MOF材料的潜力，可用于三种不同的应用，即选择性气体分离，选择性离子传感和有机分子的选择性识别。

"点击查看英文标题和摘要"

A Trifunctional Luminescent 3D Microporous MOF with Potential for CO2 Separation, Selective Sensing of a Metal Ion, and Recognition of a Small Organic Molecule

A 3D microporous luminescent metal–organic framework {[Zn(oba)(L)_0.5]·dma}_n (IITKGP‐9, IITKGP represents the Indian Institute of Technology Kharagpur; L = 3,3′‐azodipyridine, H₂oba = 4,4′‐oxydibenzoic acid) with 1D rhombus‐shaped channels has been synthesized by employing a bent organic linker with an unexploited azo‐functionalized N,N′ spacer. The metal–organic framework (MOF) exhibits potential for highly selective sorption of CO₂ with excellent selectivity of CO₂ from CO₂/N₂ (291 at 273 K and 118 at 295 K) and CO₂/CH₄ (17.5 at 273 K and 4.8 at 295 K) at a pressure of 1 bar, as demonstrated by ideal adsorbed solution theory (IAST) calculations. Such high separation ability, especially at 273 K for CO₂/N₂, can be attributed to the microporous (5.8 × 6.6 Å²) nature of this MOF and the enhanced interactions of the adsorbed CO₂ molecules with the functional azo groups decorating the pore channels. This MOF is highly emissive at 374 nm upon excitation at 310 nm. The free azo groups exposed in the channels serve as functional sites for the sensing of metal ions and the recognition of small organic molecules through the quenching of fluorescence. Fluorescence measurements revealed that this MOF can selectively sense Fe³⁺ and also detect toxic nitromethane with high sensitivity. Elemental mapping by energy‐dispersive X‐ray spectroscopy and powder XRD analysis of the Fe³⁺‐loaded MOF material, recyclability tests, and a plausible quenching mechanism are presented. Thus, this MOF demonstrates potential as a trifunctional MOF material for three different applications, namely selective gas separation, selective ion sensing, and selective recognition of organic molecules.

更新日期：2018-06-19

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南