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Magnesium(II) Complexes with High Emission: The Distinct Charge‐Transfer Process from Transition Metal
Author(s) -
Deng WenTing,
Qu Hang,
Huang ZheYu
Publication year - 2018
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201800156
Subject(s) - luminescence , excited state , transition metal , chemistry , ligand (biochemistry) , metal , fluorescence , crystallography , crystal structure , single crystal , divalent , crystal (programming language) , materials science , atomic physics , catalysis , organic chemistry , physics , biochemistry , receptor , optoelectronics , quantum mechanics , computer science , programming language
Generally, the first‐row transition‐metal complexes are notorious in luminescence materials because of their metal‐ligand charge transfer in emission process. Herein, we rationally used magnesium instead the first‐row transition metal to coordinate with 2‐(anthracen‐9‐yl)‐1H‐imidazo[4,5‐f][1,10]phenanthroline (AIP) in the construction of luminescent complexes. Further investigation revealed AIP could work as detector for quantitative determination of Mg 2+ cation. Comparing to other divalent cations, this fluorescence sensor exhibited high selectivity for the quantitative determination of Mg 2+ with the low limit of detection (5 × 10 –7 m ). Through X‐ray single crystal diffraction, the crystal structures of [Mg(AIP 2 )(NO 3 ) 2 · (H 2 O) 4 ] ( 1 ), [Mn(AIP)(NO 3 ) · EtOH] ( 2 ), and [Co 2 (AIP) 2 Cl 4 · (MeOH) 2 ] ( 3 ) were observed in various arrangements. The theory calculations based on crystal structures indicated the Mg II complex undergoes distinct charge‐transfer process from other transition‐metals based compounds, in which charge‐transfer excited‐state lifetimes were deactivated rapidly through metal‐to‐ligand charge‐transfer (MLCT) process. This study provided insight into construction of luminescence compounds by using d 0 metals in main groups instead of transition metals.