@article{Wang2022, 
author = {Dan Wang and Jun Jiang and Meng-Ya Cao and Sai-Sai Xie and Ya-Min Li and Li-Juan Chen and Jun-Wei Zhao and Guo-Yu Yang},
title = {An unprecedented dumbbell-shaped pentadeca-nuclear W–Er heterometal cluster stabilizing nanoscale hexameric arsenotungstate aggregate and electrochemical sensing properties of its conductive hybrid film-modified electrode},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {4},
pages = {3628-3637},
keywords = {polyoxometalate, lanthanide-inserted arsenotungstate, polyoxometalate-based conductive film},
url = {https://www.sciopen.com/article/10.1007/s12274-021-3940-8},
doi = {10.1007/s12274-021-3940-8},
abstract = {Cluster-based functional materials have made remarkable progress owing to their wonderful structures and distinctive physicochemical performances, one of on-going advancements of which is basically driven by synthetic chemistry of exploring and constructing novel nanosized gigantic polyoxometalate (POM) aggregates. In this article, an unprecedented nanoscale hexameric arsenotungstate aggregate Na9K16H4[Er0.5K0.5(H2O)7][Er5W10O26(H2O)14][B-α-AsW9O33]6·102H2O (1) has been synthesized by the combined synthetic strategy of simultaneously using the arsenotungstate precursor and simple tungstate material in a highly acidic aqueous solution. The {[Er5W10O26(H2O)14][B-α-AsW9O33]6}31− polyanion in 1 consists of an intriguing dumbbell-shaped pentadeca-nuclear W–Er heterometal {Er5W10O26(H2O)14}23+ cluster connecting six trilacunary [B-α-AsW9O33]9− moieties, which has never been seen previously. Furthermore, through electropolymerization of 1 and pyrrole on the conductive substrate, a thickness-controllable and robust 1–PPY (PPY = polypyrrole) hybrid film was successfully prepared, which represents the first POM–PPY film assembled from high-nuclear lanthanide (Ln) encapsulated POM and PPY hitherto. The 1–PPY film-based electrochemical biosensor exhibits a favorable recognition performance for ochratoxin A in multiple media. This work not only provides a feasible combined synthetic strategy of the POM precursor and simple tungstate material for constructing complicated multi-Ln-inserted POM aggregates, but also offers a promising electrochemical platform constructed from POM-based conductive films for identifying trace biomolecules in complex environments.}
}