title: A sulfur-free iridium(III) complex for highly selective and multi-signaling mercury(II)-chemosensors.
abstract: A sulfur-free iridium(III) complex (pbi)2Ir(mtpy) (1) was successfully prepared and adopted as a Hg(II)-chemosensor with high selectivity and sensitivity. Multi-signaling responses towards Hg(II) ions were observed by UV-vis absorption, phosphorescence and electrochemistry measurements. With addition of Hg(II) ions, complex 1 presented quenched emission in its phosphorescence spectrum and the detection limit was as low as 2.5 × 10(-7) M. Additionally, its redox peak currents showed a broad linear relationship with the concentration of Hg(II) ions ranging from 0 to 500 μM, which was beneficial for the quantitative detection. Based on the (1)H NMR and ESI-MS analyses, the probing mechanism was tentatively supposed to be the Hg(2+)-induced changes in the local environment of complex 1. Such a response process was useful for achieving simple and effective detection of Hg(II) ions as well as developing more chemosensors.
authors.affiliation: Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 Jilin, People's Republic of China. shangg187@nenu.edu.cn sunhz335@nenu.edu.cn zmsu@nenu.edu.cn and Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing 210046, P. R. China.
authors.forename: Hong-Tao
authors.initials: HT
authors.lastname: Cao
authors.affiliation: Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 Jilin, People's Republic of China. shangg187@nenu.edu.cn sunhz335@nenu.edu.cn zmsu@nenu.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Ding
authors.affiliation: Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 Jilin, People's Republic of China. shangg187@nenu.edu.cn sunhz335@nenu.edu.cn zmsu@nenu.edu.cn.
authors.forename: Guo-Gang
authors.initials: GG
authors.lastname: Shan
authors.affiliation: Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 Jilin, People's Republic of China. shangg187@nenu.edu.cn sunhz335@nenu.edu.cn zmsu@nenu.edu.cn.
authors.forename: Hai-Zhu
authors.initials: HZ
authors.lastname: Sun
authors.affiliation: Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 Jilin, People's Republic of China. shangg187@nenu.edu.cn sunhz335@nenu.edu.cn zmsu@nenu.edu.cn.
authors.forename: Yong
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024 Jilin, People's Republic of China. shangg187@nenu.edu.cn sunhz335@nenu.edu.cn zmsu@nenu.edu.cn.
authors.forename: Zhong-Min
authors.initials: ZM
authors.lastname: Su