Optical oxygen sensing materials based on trinuclear starburst ruthenium(II) complexes assembled in mesoporous silica

Ratiometric Dissolved Oxygen Sensors Based on Ruthenium Complex Doped with Silver Nanoparticles

“…The oxygen-sensing dye is excited and then emits light of which the intensity, decay time, or wavelength is dependent on the oxygen concentration. Several dyes have been used for luminescence-based oxygen sensors, such as polycyclic aromatic hydrocarbons [2], quinoline, pyrenebutyricacid [3], transition metal–ligand complexes of palladium and iridium [4,5], osmium [6], rhenium [7,8], ruthenium [9,10,11,12,13,14,15], platinum [16,17], metalloporphyrins, and polypyridine complexes [18]. The luminescence 61-(p-hydroxyphenyl methano) fullerene has also been reported for oxygen sensing by covalently immobilization [19].…”

Tuning oxygen sensitivity of ruthenium complex exploiting silver nanoparticles

“…Most of the optical oxygen sensors work on the principle of luminescence quenching of different types of organic dyes in oxygen permeable solid matrices. These organic dyes are pyrene and its derivatives [2], pyrenebutyricacid, quinoline and phenanthrene [3], transition metal complexes of osmium [4], rhenium [5,6], platinum [7,8], palladium and iridium [9,10], ruthenium [11][12][13][14][15][16][17], polypyridine complexes and metalloporphyrins [18]. Covalently assembled monolayer of 61-(p-hydroxyphenylmethano) fullerene molecules has also been used for oxygen sensing [19].…”

“…The calibration plots were nonlinear within the measured oxygen concentrations [15]. Not only the ruthenium based dyes but also other transition metal complexes and porphyrin derivatives developed to date exhibit nonlinear calibration data or Stern-Volmer plots especially for the large working ranges [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][20][21][22][23][24][25]. This is due to the uncontrollable high sensitivity of the exploited dyes towards oxygen.…”

“…On the other hand, recently, fabrication of mesoporous, micro and nano-scale matrix materials and their usage for gas sensing purposes have been studied [2,6,7,9,[13][14][15][16][17][20][21][22][23][24][25] structure with enhanced surface area, the feasibility of modification and reliable entrapment of fluorescent dyes within the cavities make them useful as solid matrix materials for the design of optical chemical sensors [25]. Besides, the development of micro and nanomaterials will support the design of new sensors, which represent enhanced analytical characteristics such as small size, robustness, low limit of detection values and enhanced relative signal change.…”

Porous Silicon Nanowire Arrays for Reversible Optical Gas Sensing

“…Now a new materials based on ruthenium (II) complex covalently assembled mesoporous silica have purposed. It have been revealed that the covalently grafted sample exhibits better reversibility and higher photochemical stability than the physically incorporated sample since the Ru(II) molecules are strongly covalently grafted to the SiO network via the CH 2 Si bonds …”