A series of fluorinated pyrazoline derivatives were synthesized by the reaction of fluorinated chalcone with hydrazine ArNHNH2 (Ar=4‐BrC6F4, 4‐ClC6H4, C6H5, 4‐CH3C6H4 and 4‐CH3OC6H4). The structures of all these compounds were fully supported by their spectroscopic data and one of products was further confirmed by X‐ray single crystal diffraction analysis. The capability of fluorinated triaryl‐2‐pyrazolines to detect metal cations was investigated, by monitoring changes in their fluorescence spectra in the presence of Cd2+, Co2+, Cu2+, Mn2+, Ni2+ and Zn2+.

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A service robot serving safely and politely needs to track the surrounding people robustly, especially for Tour-Guide Robot (TGR). However, existing multi-object tracking (MOT) or multi-person tracking (MPT) methods are not applicable to TGR for the following reasons: 1. lacking relevant large-scale datasets; 2. lacking applicable metrics to evaluate trackers. In this work, we target the visual perceptual tasks for TGR and present the TGRDB dataset, a novel largescale multi-person tracking dataset containing roughly 5.6 hours of annotated videos and over 450 long-term trajectories. Besides, we propose a more applicable metric to evaluate trackers using our dataset. As part of our work, we present TGRMPT, a novel MPT system that incorporates information from head shoulder and whole body, and achieves state-of-theart performance. We have released our codes and dataset in https://github.com/wenwenzju/TGRMPT.

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