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Issue 14, 2019
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An integrated urea and halogen bond donor based receptor for superior and selective sensing of phosphates

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Abstract

A new RuII based bis-heteroleptic ditopic receptor, 1[PF6]2 (C44H33F12IN10OP2Ru), having integrated anion binding iodotriazole (halogen bond donor) and urea units (–NH bond donor) is employed for selective sensing of phosphates (e.g., H2PO4 and HP2O73−). 1[PF6]2 showed superiority in phosphate sensing in CH3CN as compared to its hydrogen bond donor analogue, 2[PF6]2 (C44H34F12N10OP2Ru), non-urea halogen bond analogue, 3[PF6]2 (C38H27F12IN8P2Ru) and non-urea hydrogen bond donor analogue, 4[PF6]2 (C38H28F12N8P2Ru) in terms of enhanced binding constant values, longer excited state lifetimes and lower detection limit values. 1H-NMR, Isothermal Titration Calorimetry (ITC) and photophysical studies revealed the implementation of the combined role of both the halogen bond donor iodotriazole unit and the –NH unit of the urea moiety for selective and enhanced binding of phosphates.

Graphical abstract: An integrated urea and halogen bond donor based receptor for superior and selective sensing of phosphates

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Publication details

The article was received on 22 Dec 2018, accepted on 01 Mar 2019 and first published on 01 Mar 2019


Article type: Paper
DOI: 10.1039/C8DT05066J
Dalton Trans., 2019,48, 4538-4546

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    An integrated urea and halogen bond donor based receptor for superior and selective sensing of phosphates

    T. K. Ghosh, S. Mondal, S. Bej, M. Nandi and P. Ghosh, Dalton Trans., 2019, 48, 4538
    DOI: 10.1039/C8DT05066J

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