Luminescent monomeric and dimeric Ru(ii) acyclic carbene complexes as selective sensors for NH3/amine vapor and humidity. Issue 42 (11th October 2021)

• Record Type: Journal Article
• Authors: Han, Jingqi; Cheng, Shun-Cheung; Yiu, Shek-Man; Tse, Man-Kit; Ko, Chi-Chiu
• Is Part Of: Chemical science. Volume 12:Issue 42(2021)
• Page Start: 14103
• Page End: 14110
• Publication Date: 2021-10-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1sc04074j
• Languages: English
• ISSNs: 2041-6520

Abstract

Abstract : A new class of selective ammonia/amine vapor and humidity sensors have been developed from the luminescent bis(bipyridyl) Ru(ii ) pyridyl acyclic carbene complexes with environmentally-sensitive dimerization equilibrium. Abstract : A new class of luminescent bis(bipyridyl) Ru(ii ) pyridyl acyclic carbene complexes with environmentally-sensitive dimerization equilibrium have been developed. Owing to the involvement of the orbitals of the diaminocarbene ligand in the emissive excited state, the phosphorescence properties of these complexes are strongly affected by H-bonding interactions with various H-bonding donor/acceptor molecules. With the remarkable differences in the emission properties of the monomer, dimer, and H-bonded amine adducts together with the change of the dimerization equilibrium, these complexes can be used as luminescent gas sensors for humidity, ammonia, and amine vapors. With the responses to amines and humidity and the corresponding change in the luminescence properties, a proof-of-principle for binary optical data storage with a reversible concealment process has been described.