The Structure and Property of Two Different Metal-Organic Frameworks Based on N/O-Donor Mixed Ligands

Zhiqiang Lu,Chu Hao,Hui Yao,Yi Ru,Rongkai Jiao,Mengke Zuo,Yanzhi Li,Shujian Yang

doi:10.3390/cryst11091129

Zhiqiang Lu, Chu Hao + Show 6 more

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https://doi.org/10.3390/cryst11091129

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Abstract

Two different metal-organic frameworks (MOFs) [Cd2(AZN)(HAZN)(btc)(Hbtc)·4H2O]·2H2O (1), and [Zn3(AZN)2(btc)2·4H2O] (2) were synthesized by the reactions of different metal salts with mixed ligands of 1-(4-(1H-imidazol-5-yl)phenyl)-1H-1,2,4-triazole (AZN) and trimesic acid (H3btc). The different metal centers in the reaction condition have important impact on the resulting structures of MOFs 1 and 2. Compound 1 is a one-dimensional (1D) chain structure, while 2 features a three-dimensional (3D) framework with 3-fold interpenetration topology of Point (Schläfli) symbol of (6·82)4(62·82·102). Furthermore, the luminescent properties have been studied for MOFs 1 and 2.

Highlights

Metal-organic frameworks (MOFs) is a class of novel crystalline metal−organic hybrid materials, which has received considerable attention in recent decades, on one hand, because of their intriguing structures, and on the other hand, due to their potential applications in chemical probe, gas storage, luminescence, photovoltaic conversion, heterogeneous catalysis, and so on [1,2,3,4,5]
The MOFs consist of organic ligands and metal ions, that is, the successful construction of MOFs involves an understanding of how organic ligands are designed
We report the structures and property of two MOFs of [Cd2 (AZN)(HAZN)(btc)(Hbtc)·4H2 O]·2H2 O

Summary

Introduction

Metal-organic frameworks (MOFs) is a class of novel crystalline metal−organic hybrid materials, which has received considerable attention in recent decades, on one hand, because of their intriguing structures, and on the other hand, due to their potential applications in chemical probe, gas storage, luminescence, photovoltaic conversion, heterogeneous catalysis, and so on [1,2,3,4,5]. In order to obtain desirable functional materials for gas storage, it is a primary principle that porous MOFs with a stable structure and high surface area should be achieved. The multiple N/O-donor ligands are the most important candidates in this space as the N/O atoms possess a favorable coordinated ability with metal atoms. The organic compounds possessing N or O-donor coordination sites are two types of the important ligands, which synthesize diverse MOFs due to their strong affinities with metal atoms [12,13,14,15]. 1,2,4-triazole and its derivatives are effective organic compounds, and serve as N-donor ligands links with metal ions, thereby benefiting the construction for functionalized MOFs [16].

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