A Photoluminescent Ag 10 Cu 6 Cluster Stablized by a PNNP Ligand and Phenylacetylides Selectively and Reversibly Senses Ammonia in Air and Water.

Authors :: Wang Y
Yan JJ
Hu S
James Young D
Li HX
Ren ZG
Source :: Chemistry, an Asian journal [Chem Asian J] 2021 Sep 20; Vol. 16 (18), pp. 2681-2686. Date of Electronic Publication: 2021 Aug 04.
Publication Year :: 2021
Abstract: A photoluminescent bimetallic cluster [Ag <subscript>10</subscript> Cu <subscript>6</subscript> (bdppthi) <subscript>2</subscript> (C≡CPh) <subscript>12</subscript> (MeOH) <subscript>2</subscript> (H <subscript>2</subscript> O)](ClO <subscript>4</subscript> ) <subscript>4</subscript> (1, bdppthi=N,N'-bis(diphenylphosphanylmethyl)-tetrahydroimidazole} was synthesized from the PNNP type ligand bdppthi generated in-situ. Upon excitation at 365 nm, 1 exhibited strong phosphorescent emission at 630 nm, which was selectively quenched by NH <subscript>3</subscript> in air or water. The sensing of NH <subscript>3</subscript> was rapid and recoverable, with detection limits of 53 ppm (v/v) in N <subscript>2</subscript> and 21 μmol/L (0.36 ppm, w/w) for NH <subscript>3</subscript> ⋅ H <subscript>2</subscript> O in water. Cluster 1 could potentially serve as a bifunctional chemical sensor for the efficient detection of ammonia in waste-gas and waste-water.<br /> (© 2021 Wiley-VCH GmbH.)

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