@article{Li2024, 
author = {Hui-Zi Li and Fei Wang and Jian Zhang},
title = {A visible-light-active ellagic acid-based titanium-oxo cluster for room temperature chemiresistive sensing},
year = {2024},
journal = {Polyoxometalates},
volume = {3},
number = {4},
pages = {9140066},
keywords = {ellagic acid, titanium-oxo clusters, chemiresistive sensing, visible-light-active},
url = {https://www.sciopen.com/article/10.26599/POM.2024.9140066},
doi = {10.26599/POM.2024.9140066},
abstract = {In this study, we synthesized a visible-light-active titanium-oxo cluster (TOC), i.e., [(CH3)2NH2]+2·[Ti4L2(OiPr)10]2− (1), based on ellagic acid (H4L). The molecular structure of 1 was determined using single-crystal X-ray diffraction, revealing a cyclodextrin-like tetramer formed by four Ti4 clusters and dimethylamine cations. Owing to its effective ligand-to-metal charge transfer, 1 exhibited good visible-light absorption ability and photocurrent response, as confirmed by ultraviolet–visible (UV–vis) spectroscopy and photoelectric testing. Structurally, the large number of uncoordinated oxygen sites in 1 serve not only as assembly sites but also as active sites for NO2 detection. Moreover, 1 exhibited high NO2 response and excellent selectivity under visible-light irradiation at room temperature. This research provides the first exploration of TOCs in gas sensing applications, expanding their potential beyond traditional uses.}
}