1,2,6-Hexanetriol - CAS 106-69-4
Catalog number: 106-69-4
Category: Main Product
Molecular Formula:
Molecular Weight:
clear light yellow coloured, viscous liquid (*)
hexane-1,; TRIHYDROXYHEXANE(1,2,6-); Hexane-1,2,6-triol; HEXANETRIOL(1,2,6-); HT; 1,2,6-TRIHYDROXYHEXANE
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Boiling Point:
178ºC (6.7 mmHg)
Melting Point:
Canonical SMILES:
Physical Description:
1,2,6-Hexanetriol 97% (500g)
1.Direct measurements of the optical cross sections and refractive indices of individual volatile and hygroscopic aerosol particles.
Mason BJ1, Cotterell MI1, Preston TC2, Orr-Ewing AJ1, Reid JP1. J Phys Chem A. 2015 Jun 4;119(22):5701-13. doi: 10.1021/acs.jpca.5b00435. Epub 2015 May 22.
We present measurements of the evolving extinction cross sections of individual aerosol particles (spanning 700-2500 nm in radius) during the evaporation of volatile components or hygroscopic growth using a combination of a single particle trap formed from a Bessel light beam and cavity ring-down spectroscopy. For single component organic aerosol droplets of 1,2,6-hexanetriol, polyethylene glycol 400, and glycerol, the slow evaporation of the organic component (over time scales of 1000 to 10,000 s) leads to a time-varying size and extinction cross section that can be used to estimate the refractive index of the droplet. Measurements on binary aqueous-inorganic aerosol droplets containing one of the inorganic solutes ammonium bisulfate, ammonium sulfate, sodium nitrate, or sodium chloride (over time scales of 1000 to 15,000 s) under conditions of changing relative humidity show that extinction cross-section measurements are consistent with expectations from accepted models for the variation in droplet refractive index with hygroscopic growth.
2.Organic component vapor pressures and hygroscopicities of aqueous aerosol measured by optical tweezers.
Cai C1, Stewart DJ, Reid JP, Zhang YH, Ohm P, Dutcher CS, Clegg SL. J Phys Chem A. 2015 Jan 29;119(4):704-18. doi: 10.1021/jp510525r. Epub 2015 Jan 15.
Measurements of the hygroscopic response of aerosol and the particle-to-gas partitioning of semivolatile organic compounds are crucial for providing more accurate descriptions of the compositional and size distributions of atmospheric aerosol. Concurrent measurements of particle size and composition (inferred from refractive index) are reported here using optical tweezers to isolate and probe individual aerosol droplets over extended timeframes. The measurements are shown to allow accurate retrievals of component vapor pressures and hygroscopic response through examining correlated variations in size and composition for binary droplets containing water and a single organic component. Measurements are reported for a homologous series of dicarboxylic acids, maleic acid, citric acid, glycerol, or 1,2,6-hexanetriol. An assessment of the inherent uncertainties in such measurements when measuring only particle size is provided to confirm the value of such a correlational approach.
3.Measurements of the evaporation and hygroscopic response of single fine-mode aerosol particles using a Bessel beam optical trap.
Cotterell MI1, Mason BJ, Carruthers AE, Walker JS, Orr-Ewing AJ, Reid JP. Phys Chem Chem Phys. 2014 Feb 7;16(5):2118-28. doi: 10.1039/c3cp54368d.
A single horizontally-propagating zeroth order Bessel laser beam with a counter-propagating gas flow was used to confine single fine-mode aerosol particles over extended periods of time, during which process measurements were performed. Particle sizes were measured by the analysis of the angular variation of light scattered at 532 nm by a particle in the Bessel beam, using either a probe beam at 405 nm or 633 nm. The vapour pressures of glycerol and 1,2,6-hexanetriol particles were determined to be 7.5 ± 2.6 mPa and 0.20 ± 0.02 mPa respectively. The lower volatility of hexanetriol allowed better definition of the trapping environment relative humidity profile over the measurement time period, thus higher precision measurements were obtained compared to those for glycerol. The size evolution of a hexanetriol particle, as well as its refractive index at wavelengths 532 nm and 405 nm, were determined by modelling its position along the Bessel beam propagation length while collecting phase functions with the 405 nm probe beam.
4.Impact of organic coating on optical growth of ammonium sulfate particles.
Robinson CB1, Schill GP, Zarzana KJ, Tolbert MA. Environ Sci Technol. 2013;47(23):13339-46. doi: 10.1021/es4023128. Epub 2013 Nov 18.
Light extinction by particles in Earth's atmosphere is strongly dependent on particle size, chemical composition, hygroscopic growth properties, and particle mixing state. Here, the influence of an organic coating on particle optical growth was studied. The particle optical growth factor, fRHext, was measured using cavity ring-down aerosol extinction spectroscopy at 532 nm. The particles were composed of ammonium sulfate (AS), 1,2,6-hexanetriol, and mixed particles containing a wet or dry ammonium sulfate core and a 1,2,6-hexanetriol coating. Dry, coated particles were generated by atomization followed by drying. Wet, coated particles were formed via liquid-liquid phase separation (LLPS). LLPS was achieved by deliquescing and then drying the particles to a relative humidity (RH) between the phase separation RH and the efflorescence RH. For the LLPS particles, the fRHext at each RH was between the fRHext of ammonium sulfate and that of 1,2,6-hexanetriol.
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