Luminescent monomeric and dimeric Ru(ii) acyclic carbene complexes as selective sensors for NH3/amine vapor and humidity† † Electronic supplementary information (ESI) available: Experimental details (synthetic procedures, characterization data, physical measurements and instrumentation, quantum yield determination), crystal data, powder XRD and simulated patterns of 1 and 3, selected bonding parameters for 1, 2 and 3, absorption spectra of the monomeric and dimeric form of 2, concentration-dependent absorption and emission spectra of 3, solid-state emission of the crystal sample and solvatochromic properties of 1, emission spectral changes of 1Ms upon addition of various amines, UV-vis absorption, 1H NMR, and DOSY NMR spectra of 1 after addition of IPA, and other supporting experimental data. CCDC 2076382–2076384. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/d1sc04074j

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. 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.

SUBMITTER: Han J 

PROVIDER: S-EPMC8565393 | biostudies-literature |

REPOSITORIES: biostudies-literature