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Alkynylplatinum(II) Terpyridine System Coupled with Rhodamine Derivative: Interplay of Aggregation, Deaggregation,
Yukun Cheng1, Ling Li1, Fangfang Wei1
1Department of Chemistry , Southern University of Science and Technology , No. 1088, Tangchang Boulevard, Nanshan District , Shenzhen 518055 , P. R. China.
Abstract:
The synthesis and characterization of a platinum(II) terpyridine system tethered with a latent organic dye of rhodamine derivative as colorimetric and luminescent sensory moiety is reported to show selective Hg2+ ion sensing behavior. The interplay of aggregation/deaggregation behavior of the alkynylplatinum(II) terpyridine complex and the ring-opening process of rhodamine derivative was investigated. The spectral change of aggregation near-infrared emission at 800 nm and rhodamine fluorescence at 585 nm provides a possible ratiometric luminescence measurement. Morphological studies from transmission electron microscopy and scanning electron microscopy images showing nanospherical structures confirmed the aggregation in the absence of Hg2+ ion.
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