Abstract Three new Coordination Polymers (CPs), namely [Co2(dpb)(dipe)(H2O)2]n (1), [Zn2(dpb)(dipe)(H2O)2]n (2) and {[Co2(dpb)(bib)2(H2O)]·H2O}n (3), where H4dpb = 1-(3,5-dicarboxy-benzyl)-1H-pyrazole-3,5-dicarboxylic acid, dipe = (E)-1,2-di(pyridin-4-yl)ethene, bib = 1,4-di(1H-imidazol-1-yl)benzene, have been synthesized hydrothermally and characterized. Single-crystal XRD data analysis reveals that 1 and 2 are isomorphic, and possessing a (3,4,5)-connected net with a Schlafli symbol of (4·62)(4·65)(42·65·83), Complex 3 presents a (4,4,4)-connected 3-nodal 3D net with {4·62·83}{4·63·82}{64·82}. Also, we systematically examined the fluorescence sensing responses of 2 to small solvent molecules and metal ions. Notably, complex 2 can act as a potential promising fluorescence sensor for sensing acetone and Fe3+ ion with high selectivity and sensitivity. Meanwhile, we have investigated the magnetic behaviors of complexes 1 and 3 with dinuclear Co(II) centers, revealing antiferromagnetic behavior in 1 and 3.

中文翻译：

---

基于1-（3,5-二羧基-苄基）-1H-吡唑-3,5-二羧酸配体的三种新型配位聚合物：合成，晶体结构，磁性和选择性传感性质

摘要三种新型配位聚合物（CPs）分别为[Co2（dpb）（dipe）（H2O）2] n（1），[Zn2（dpb）（dipe）（H2O）2] n（2）和{[Co2（ dpb）（bib）2（H2O）]·H2O} n（3），其中H4dpb = 1-（3,5-二羧基-苄基）-1H-吡唑-3,5-二羧酸，dipe =（E）-通过水热法合成并表征了1,2-二（吡啶-4-基）乙烯，bib = 1,4-二（1H-咪唑-1-基）苯。单晶XRD数据分析显示1和2是同构的，并具有（3,4,5）连接的网，其Schlafli符号为（4·62）（4·65）（42·65·83），复合体3表示一个（4,4,4）连接的3节点3D网络，其中包含{4·62·83} {4·63·82} {64·82}。此外，我们系统地检查了2对小的溶剂分子和金属离子的荧光传感响应。尤其，络合物2可以作为潜在的有前途的荧光传感器，以高选择性和高灵敏度检测丙酮和Fe3 +离子。同时，我们研究了具有双核Co（II）中心的配合物1和3的磁行为，揭示了在1和3中的反铁磁行为。