Abstract

Water quenching of luminescent [Ru(phen)₂dppz]Cl₂, [Ru(phen)₂dppn]Cl₂, and [Ru(4,7-Ph₂phen)₂ dppz]Cl₂ (phen = 1,10-phenanthroline; 4,7-Ph₂phen = 4; 4,7-diphenyl-1,10-phenanthroline; dppz = dipyrido[3,2-a:2′3′-c]phenazine; dppn = benzodipyrido(a:3,2-h:2′,3′-j)phenazine) complexes was studied in acetonitrile and in polymers. The polymers contained hydrophobic and hydrophilic components to control mechanical properties and were designed to absorb water with changing humidity and, thus, affect the emission intensity and lifetime. Quenching by water in mixed solvents and in polymers was shown to arise from a combination of diffusional and static ground-state associational quenching. The factors controlling polymer properties are discussed. The systems can be tailored to give a wide range of responses or function as a binary sensor at a fixed humidity level.

Simple light-emitting electrochemical cell using reduced graphene oxide and a ruthenium (II) complex

Harry Anderson Rivera Tito, Johannes Zimmermann, Nils Jürgensen, Gerardo Hernández Sosa, and María Esther Quintana Caceda
Appl. Opt. 56(23) 6476-6484 (2017)

Polar-groups-modified polyimide based on a fiber Bragg grating for relative humidity sensors

Heng Wu, Tengpeng Sun, Jiankun Peng, Jixiang Dai, and Minghong Yang
Appl. Opt. 59(8) 2468-2473 (2020)

Optical fiber relative humidity sensor based on FBG incorporated thin-core fiber modal interferometer

Bobo Gu, Mingjie Yin, A. Ping Zhang, Jinwen Qian, and Sailing He
Opt. Express 19(5) 4140-4146 (2011)

Optical oxygen sensing properties of Ru(II) complex and porous silica nanoparticles embedded in solgel matrix

Cheng-Shane Chu
Appl. Opt. 50(25) E145-E151 (2011)

Relative humidity sensor with optical fiber Bragg gratings

Pascal Kronenberg, Pramod K. Rastogi, Philippe Giaccari, and Hans G. Limberger
Opt. Lett. 27(16) 1385-1387 (2002)