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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Intramolecular Charge Transfer-Boosted π-π Stacking for Rapid Screening of the d Electron Number in Transition Metals
Yao Liu1, Xinyu Fan1, Jialin Guan1
1State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing100029, China.
Abstract:
The d electrons largely affect the physicochemical properties of transition metal, and its rapid screening is significant to the understanding and regulation of metal-based materials. In this study, we proposed an imidazole-anchored naphthalenediamine-based fluorescent probe for rapid screening of d electrons of transition metal ions. The d electron-regulated fluorescence quenching is attributed to the fact that d electron number-enhanced probe-metal binding, which promotes the intramolecular charge transfer and benefits the face-to-face π-π stacking of the naphthalene motif. The universality of d electron-regulated fluorescence is validated by imidazole-anchored phenylenediamine with a smaller π-electron delocalization system. In addition, the d electron number-related fluorescence character is applied for the differentiation of transition metal ions based on a sensor array.
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