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A 3D Adenine‐based Cd‐MOF: Synthesis, Structure and Photoluminescent Sensing for an Aromatic Azo Compound
Zeitschrift für anorganische und allgemeine Chemie ( IF 1.1 ) Pub Date : 2020-10-13 , DOI: 10.1002/zaac.202000303
Yang Liu 1 , Shi‐Ting Zhang 1 , Yan‐Bin Wu 1 , Wei Li 1 , Ying‐Qun Yang 1
Affiliation  

A new Cd‐MOF containing the nucleobase adenine and multicarboxylates, Cd2(tdc)2(1H‐ade)2(H2O) (H2tdc = 2,5‐thiophene carboxylic acid, 1H‐ade = adenine), was synthesized successfully under hydrothermal condition and characterized by single‐crystal X‐ray diffraction, infrared spectrum, thermogravimetric analysis and photoluminescence. The two crystallographically unsymmetrical Cd atoms are bridged by 2,5‐tdc ligands with (κ1‐κ1)‐(κ1)‐μ3 and (κ1–κ1)–μ2 modes into two dimensional extended layers, which are further pillared with the neutral ade molecules to form a 3D frameworks stabilized by extensive π···π interactions between imidazole‐, pyrimidine‐ and thiophene‐rings. Inspection of the structure reveals that the architecture can be simplified as a 3,4,5‐ connected networks with a Schläfli symbol of (62·8)(42·63·8)(42·65·83). The photochemical property shows that the luminescent emission can be significantly quenched by aromatic azo compounds. The quenching effect coefficient (Ksv) for bis(4‐imidazol‐1‐yl‐phenyl)diazene is determined to be 4.1 × 104 m–1, indicating the title compound as a potential fluorescent sensing materials.

中文翻译:

基于腺嘌呤的3D Cd-MOF:芳香族偶氮化合物的合成,结构和光致发光传感

含有核碱基腺嘌呤和多羧酸盐Cd 2(tdc)2(1H-ade)2(H 2 O)(H 2 tdc = 2,5-噻吩羧酸,1H-ade =腺嘌呤)的新Cd-MOF在水热条件下成功合成,并具有单晶X射线衍射,红外光谱,热重分析和光致发光的特征。两个晶体学上有不对称镉原子被2,5- TDC配体与(κ桥接11(κ - )1)-μ 3和(κ 11)-μ 2模态扩展为二维扩展层,并进一步与中性ade分子形成支柱,形成3D骨架,该骨架通过咪唑环,嘧啶环和噻吩环之间的广泛π ··· π相互作用而稳定。对结构的检查表明,该架构可以简化为3,4,5连接的网络,其Schläfli符号为(6 2 · 8)(4 2 · 6 3 · 8)(4 2 · 6 5 · 8 3)。光化学性质表明,发光可以被芳族偶氮化合物猝灭。淬火效应系数(K sv)对双(4-咪唑-1-基苯基)二氮烯的测定为4.1×10 4 m –1,表明标题化合物为潜在的荧光传感材料。
更新日期:2020-12-10
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