ChemInform Abstract: PHOTOINDUCED DISPROPORTIONATION OF RU(BPY)32+ ON POROUS VYCOR GLASS

Kennelly, T.; Gafney, Harry D.; Braun, Martin

doi:10.1002/chin.198545271

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“…However, it has been observed that Stern-Volmer parameters can display significant variations on micrometric scales on a priori homogeneous surfaces [58,59]. Furthermore, as was seen with other dyes [60,61], we observed a significant variation of lifetime between the different porous media and with respect to bulk solution (see section 3 in SI for more details): this observation hints at a strong interaction between the dye and the solid glass matrix which could explain the observed spatial variations, as small variations of the glass properties on large scale could significantly impact measured lifetimes. In order to moderate the impact of these fluctuations, we repeated measurements for each value of RH at different places of the samples (N = 25) and computed average lifetimes.…”

Section: Methodsmentioning

confidence: 96%

Enhanced Oxygen Solubility in Metastable Water under Tension

et al. 2018

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Despite its relevance in numerous natural and industrial processes, the solubility of molecular oxygen has never been directly measured in capillary-condensed liquid water. In this article, we measure oxygen solubility in liquid water trapped within nanoporous samples, in metastable equilibrium with a subsaturated vapor. We show that solubility increases two fold at moderate subsaturations (relative humidity ∼0.55). This evolution with relative humidity is in good agreement with a simple thermodynamic prediction using properties of bulk water, previously verified experimentally at positive pressure. Our measurement thus verifies the validity of this macroscopic thermodynamic theory to strong confinement and large negative pressures, where significant nonidealities are expected. This effect has strong implications for important oxygen-dependent chemistries in natural and technological contexts.

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Section: Methodsmentioning

confidence: 96%