【摘要】：由于金屬有機(jī)框架配合物迷人的拓?fù)浣Y(jié)構(gòu)和它們在氣體吸附、分離、熒光、磁性、催化、電學(xué)和離子交換等領(lǐng)域的巨大潛在應(yīng)用價(jià)值,近些年人們在設(shè)計(jì)和構(gòu)筑金屬有機(jī)框架配合物方面做了大量的研究工作。眾所周知,有機(jī)配體和金屬中心的選擇在配合物的組裝中至關(guān)重要,同時(shí)含有N原子和O原子的有機(jī)配體配位能力較強(qiáng),因此經(jīng)常被選擇用來合成配合物。而對于中心金屬離子,鑭系離子用的最多,因?yàn)樗鼈冇兄叩呐湮粩?shù)和更靈活的配位幾何結(jié)構(gòu),此外,由于鑭系金屬具有較窄帶寬的f-f躍遷,使得合成的基于鑭系的配合物具有出色的光學(xué)性質(zhì)。本文選用2,3,5-吡啶三酸作為有機(jī)配體,在水熱條件下合成了 7個(gè)新型的三維 Ln-Cu MOFs[LnCu2(pdc)2(H20)2]n(Ln=Sm,1-Sm;Eu,2-Eu;Gd,3-Gd;Tb,4-Tb;Dy,5-Dy;Ho,6-Ho;Er,7-Er;H2pdc=(3,5-吡啶二羧酸)),并且利用紅外光譜、X-射線單晶衍射和熱重分析對部分配合物進(jìn)行了表征。X-射線單晶衍射表明2-Eu、3-Gd、4-Tb、5-Dy、6-Ho和7-Er是同構(gòu)的,配合物的Ln3+通過3,5-吡啶二羧酸陰離子上羧基的O原子組裝成一維鏈狀結(jié)構(gòu),而一維鏈狀結(jié)構(gòu)之間通過兩個(gè)3,5-吡啶二羧酸陰離子橋連成為二維層狀結(jié)構(gòu)。最終通過來自于CuCN的Cu+的連接作用,配合物變成了一種三維網(wǎng)絡(luò)狀結(jié)構(gòu)。對配合物4-Tb、6-Ho和7-Er的熱重研究表明在溫度達(dá)到400℃時(shí),三個(gè)配合物的框架結(jié)構(gòu)依然保持穩(wěn)定。此外,本文還測定了配合物1-Sm、2-Eu、4-Tb、5-Dy、6-Ho和7-Er的固態(tài)熒光。
[Abstract]:Due to their attractive topological structure and their potential applications in the fields of gas adsorption, separation, fluorescence, magnetism, catalysis, electricity and ion exchange, In recent years, a lot of research work has been done on the design and construction of organometallic framework complexes. It is well known that the selection of organic ligands and metal centers is very important in the assembly of complexes, and organic ligands containing N and O atoms have strong coordination ability, so they are often used to synthesize complexes. For central metal ions, lanthanide ions are the most used because they have higher coordination number and more flexible coordination geometry, in addition, because lanthanide metals have a narrow bandwidth f-f transition, The synthesized lanthanide complexes have excellent optical properties. In this paper, the organic ligands were selected as organic ligands. 鍦ㄦ按鐑潯浠朵笅鍚堟垚浜，

本文編號：2166075