title: A "turn-on" lanthanide complex chemosensor for recognition of lead(ii) based on the formation of nanoparticles.
abstract: A functional amide-type pincer ligand was designed and synthesized, which could effectively capture Tb3+ions to form a phosphorescence complex-based chemosensor Tb-1. The chemosensor could further coordinate with Pb2+ions and display a turn-on phosphorescence response. This sensing process was analyzed in detail by steady-state luminescence spectroscopy, time-resolved luminescence spectroscopy, electron microscopy and dynamic light scattering, which suggest that the formation of Pb2+-induced hydroxide nanoclusters can adjust the optical signal of the external luminescence compound by embedment and fixation of Tb3+complexes. Furthermore, Tb-1 could effectively eliminate the signal interference from the short-lived fluorescence and improve the signal-to-noise ratio to increase the accuracy of the detection for Pb2+. An understanding of the recognition mechanism of the Tb3+complex-based chemosensor and the application of the characteristic spectra of lanthanide ions might be able to provide more opportunities to develop highly selective optical chemosensors.
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China. tangxiaol@lzu.edu.cn liuws@lzu.edu.cn.
authors.forename: Benhua
authors.initials: B
authors.lastname: Xu
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China. tangxiaol@lzu.edu.cn liuws@lzu.edu.cn.
authors.forename: Xiaoliang
authors.initials: X
authors.lastname: Tang
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China. tangxiaol@lzu.edu.cn liuws@lzu.edu.cn.
authors.forename: Ji'an
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China. tangxiaol@lzu.edu.cn liuws@lzu.edu.cn.
authors.forename: Wanmin
authors.initials: W
authors.lastname: Chen
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China. tangxiaol@lzu.edu.cn liuws@lzu.edu.cn.
authors.forename: Haile
authors.initials: H
authors.lastname: Liu
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China. tangxiaol@lzu.edu.cn liuws@lzu.edu.cn.
authors.forename: Zhenghua
authors.initials: Z
authors.lastname: Ju
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China. tangxiaol@lzu.edu.cn liuws@lzu.edu.cn.
authors.forename: Weisheng
authors.identifier: http://orcid.org/0000-0003-4935-6879
authors.initials: W
authors.lastname: Liu