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A pentafluorophenyl functionalized RuII-probe having halogen bond center toward recognition and sensing of perrhenate and dihydrogen phosphate
Journal of Organometallic Chemistry ( IF 2.3 ) Pub Date : 2021-08-17 , DOI: 10.1016/j.jorganchem.2021.122027
Sahidul Mondal 1 , Ambreen Rashid 1 , Pradyut Ghosh 1
Affiliation  

A newly designed Ru(II) probe, C1 containing iodotriazole (halogen bond unit) and pendent pentafluorophenyl (π-acidic) moiety shows superior dihydrogen phosphate sensing property over perrhenate and other inorganic anions. A supramolecular polymeric chain formation by the probe through halogen bond and anion-π interactions with dihydrogen phosphate is established by solid-state structural studies. On the contrary, C1 forms a dimeric aggregation via halogen bonding interaction with perrhenate. Macroscopic investigations, such as DLS, TEM, and SEM also show the formation of supramolecular polymeric aggregated structures with phosphates, however, such aggregation is not observed in the case of perrhenate. Polymeric aggregation of C1 with phosphate is additionally supported by DOSY NMR spectroscopy. Thus, the combined cooperative action of anti-electrostatic anion–anion (phosphate-phosphate), anion-π (phosphate-π of C6F5) and halogen-bonding (phosphate and C-I of probe C1) interactions are responsible for dihydrogen phosphate induced supramolecular polymeric aggregation. Finally, the formation of larger supramolecular self-assembly in presence of dihydrogen phosphate leads to selective sensing and higher binding towards the ion over perrhenate and other inorganic anions.



中文翻译:

具有卤素键中心的五氟苯基官能化RuII探针,用于识别和感知高铼酸盐和磷酸二氢盐

新设计的 Ru(II) 探针,包含碘三唑(卤素键单元)和悬垂的五氟苯基(π-酸性)部分的C1显示出优于高铼酸盐和其他无机阴离子的磷酸二氢传感性能。通过固态结构研究建立了探针通过卤素键和阴离子-π 与磷酸二氢相互作用形成的超分子聚合物链。相反,C1通过与高铼酸盐的卤素键相互作用形成二聚体聚集体。宏观研究,如 DLS、TEM 和 SEM,也显示了与磷酸盐形成超分子聚合聚集结构,但是,在高铼酸盐的情况下没有观察到这种聚集。C1的聚合体DOSY 核磁共振光谱还支持磷酸盐。因此,抗静电阴离子-阴离子(磷酸盐-磷酸盐)、阴离子-π(C 6 F 5 的磷酸盐-π )和卤素键(探针C1 的磷酸盐和 CI )相互作用的联合协同作用是磷酸二氢盐的原因诱导超分子聚合物聚集。最后,在磷酸二氢盐存在下形成更大的超分子自组装导致选择性感应和与高铼酸盐和其他无机阴离子相比更高的离子结合。

更新日期:2021-08-29
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