摘要
金属有机框架(Metal-organic frameworks,简称MOFs)作为有效能量转移的供体,在人工光采集材料领域中已引起许多专家的关注。特别是二维MOFs纳米片,因每个活性位点暴露在外易靠近受体,可以有效地将内部能量转移给外部受体,具有更为非凡的光电性能。通过选用柔性的1,2-苯二乙酸(H_(2)opda)和刚性的3,5-二(三氮唑)吡啶(btyp)作为有机配体,合成了一种新型的二维配位聚合物[Zn_(3)(btyp)_(2)(opda)_(3)(H_(2)O)_(3)]·(btyp)(H_(2)O)_(3)(Zn-MOF),晶体属于三斜晶系、P-1空间群。在该晶体结构中,反式opda配体的2个羧基均以双齿螯合模式与Zn(Ⅱ)离子配位,形成一维无限链;btyp配体桥链支撑相邻一维链,构成二维网面;通过opda羧基O与结晶H_(2)O之间多个O—H…O的相互作用形成三维超分子网络结构。Zn-MOF且具有完整的循环伏安曲线(还原、氧化电位分别为-0.22、0.05 V),良好的扫描速率。使用超声粉碎法将Zn-MOF层状结构剥离形成二维纳米片,再与香豆素6(CM6)掺杂形成CM6@Zn-MOF纳米材料,荧光从蓝光向绿光移动,将光收集范围从紫外光扩展到可见光,加之良好的电化学循环伏安性能(还原、氧化电位分别为-0.21、0.08 V),有望成为光电应用新材料。
Metal-organic frameworks(MOFs),as the donors of efficient energy transfer,have attracted the attention of many experts in the field of artificial light-harvesting materials.In particular,the two-dimensional MOFs nanoplates have more remarkable photoelectric properties because each active site can be easily accessible to the receptor when exposed to the outside,thus effectively transferring the internal energy to the external receptor.In this study,flexible 1,2-phenyldiacetic acid(H_(2)opda)and rigid 3,5-bis(triazole)pyridine(btyp)were selected as organic ligands,a novel coordination polymer[Zn_(3)(btyp)_(2)(opda)_(3)(H_(2)O)_(3)]·(btyp)(H_(2)O)(Zn-MOF)was synthesized,which belonged to triclinic crystal system and P-1 space group.In the crystal structure,the two carboxyl groups of trans-opda ligand form one-dimensional infinite chain with Zn(Ⅱ)ion by double-tooth chelating coordination;btyp ligands support adjacent one-dimensional chains to form two-dimensional network surface;the three-dimensional supramolecular network structure was formed by the interaction of O—H…O between opda and H_(2)O.Zn-MOF had a complete cyclic voltammetric curve(reduction and oxidation potentials are-0.22 and 0.05 V,respectively),and a good scanning rate.The layered structure of Zn-MOF was peeled off to form two-dimensional nanomaterials by ultrasonic comminution and then doped with Coumarin 6(CM6)to form CM6@Zn-MOF nanomaterials.The fluorescence moved from blue to green light,and expanded the light collection range from ultraviolet to visible light.Combined with the good electrochemical cyclic voltammetry performance(reduction and oxidation potentials are-0.21 and 0.08 V,respectively),CM6@Zn-MOF is expected to become a new material for photoelectric applications.
作者
李鹏云
张军
孙朋涛
张钢强
马雅菲
张美丽
LI Peng-yun;ZHANG Jun;SUN Peng-tao;ZHANG Gang-qiang;MA Ya-fei;ZHANG Mei-li(Xinjiang Shinning Environmental Protection Energy Co.,Ltd.,Hami 963000,China;College of Chemistry and Chemical Engineering,Yan′an University,Yan′an 716000,China)
出处
《化学试剂》
CAS
2025年第1期26-32,共7页
Chemical Reagents
基金
新疆维吾尔自治区重大科技专项项目(2021A01002-3)
榆林市科技局资助项目(CXY-2021-126)。
关键词
水热合成
苯二乙酸
香豆素6
晶体结构
掺杂材料
光电性能
hydro-thermal synthesis
phenyldiacetic acid
Coumarin 6
crystal structure
mixed materials
photoelectric properties
