Attenuated Total Reflection Fourier Transform Infrared Spectroscopy to Investigate Water Uptake and Phase Transitions in Atmospherically Relevant Particles

Schuttlefield, Jennifer; Al-Hosney, Hashim A.; Zachariah, Ann; Grassian, Vicki H.

doi:10.1366/000370207780220868

Cited by 74 publications

(131 citation statements)

References 51 publications

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“…Zhang et al successfully used FTIR-ATR spectroscopy to investigate the deliquescence and efflorescence processes of NaClO 4 particles. 17 Schuttlefield et al 18 also used FTIR-ATR spectroscopy to study the water uptake and the phase transitions of NaCl, NH 4 NO 3 , ͑NH 4 ͒ 2 SO 4 , and Ca͑NO 3 ͒ 2 particles, which showed an excellent agreement with the observations in previous literatures. They also proved that FTIR-ATR spectroscopy is a sensitive means to obtain the information of the trace water adsorbed on the surface of aerosol particles before deliquescence.…”

Section: Introductionsupporting

confidence: 72%

Molecular events in deliquescence and efflorescence phase transitions of sodium nitrate particles studied by Fourier transform infrared attenuated total reflection spectroscopy

Wang

Zhao

et al. 2008

The Journal of Chemical Physics

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The NaNO(3) droplets with sizes of 1-5 microm generated from a nebulizer were deposited on a ZnSe substrate in a Fourier transform infrared attenuated total reflection (FTIR-ATR) chamber. After solidification of the droplets with dry N(2) gas passing through the chamber, the solid NaNO(3) particles were monitored by in situ FTIR-ATR spectra in cycles of deliquescence and efflorescence processes with varying relative humidities (RHs). With an increase in the RH, a dominant peak at approximately 3539 cm(-1), together with three relatively weak peaks at approximately 3400, approximately 3272, and approximately 3167 cm(-1), in the O-H stretching band of water was resolved by the high signal-to-noise ratio FTIR-ATR spectra. The dominant peak and the three relatively weak peaks were contributed by the water monomers and the aggregated water molecules adsorbed on the surfaces of solid NaNO(3) particles, respectively. When the RH approached approximately 72%, slightly lower than the deliquescence RH (74.5%), the band component at approximately 3400 cm(-1) became the main peak, indicating that the water monomers and the aggregated water molecules aggregated to form a thin water layer on the surfaces of solid NaNO(3) particles. A splitting of the nu(3)-NO(3)(-) band at 1363 and 1390 cm(-1) at the RH of approximately 72%, instead of the single nu(3)-NO(3)(-) band at 1357 cm(-1) for the initial solid NaNO(3), was observed. We suggested that this reflected a phase transition from the initial solid to a metastable solid phase of NaNO(3). The metastable solid phase deliquesced completely in the region from approximately 87% to approximately 96% RH according to the fact that the nu(3)-NO(3)(-) band showed two overlapping peaks at 1348 and 1405 cm(-1) similar to those of bulk NaNO(3) solutions. In the efflorescence process of the NaNO(3) droplets, the nu(1)-NO(3)(-) band presented a continuous blueshift from 1049 cm(-1) at approximately 77% RH to 1055 cm(-1) at approximately 36% RH, indicating the formation of contact ion pairs between Na(+) and NO(3)(-). Moreover, in the RH range from approximately 53% down to approximately 26%, two peaks at 836 and 829 cm(-1) were observed in the nu(2)-NO(3)(-) band region, demonstrating the coexistence of NaNO(3) solid particles and droplets.

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Section: Introductionsupporting

confidence: 72%

Molecular events in deliquescence and efflorescence phase transitions of sodium nitrate particles studied by Fourier transform infrared attenuated total reflection spectroscopy

Wang

Zhao

et al. 2008

The Journal of Chemical Physics

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“…2, there was a dramatic increase in this region whose spectrum is populated by absorptions stemming from the C-H stretching vibrations of olefinic =CH, -CH 2 and −CH 3 groups [18,19,23,25]. Band assignment (see [20][21][22][23][24][25][26][27][28][29]). As illustrated in Fig.…”

Section: The Absorption Band Region At 3600-2800 CM −1mentioning

confidence: 99%

“…In recent years, the quantitative analysis using FT-IR spectroscopy has been used in many scientific fields, such as the environmental detection, the diagnosis of cancers and other disorders [17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Analysis of postmortem metabolic changes in rat kidney cortex using Fourier transform infrared spectroscopy

Huang

et al. 2008

Spectroscopy

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Abstract. Estimation of the time since death (postmortem interval, PMI) is one of the most difficult problems in forensic investigations and many methods currently are utilized to estimate the PMI. The aim of this study was to investigate the changes of Fourier transform infrared (FT-IR) spectra of rat kidney cortex from time zero to 168 h postmortem at molecular level. The spectra of rat kidney cortex displayed the prominent changes with increasing postmortem interval. (1) Significant increase in the intensity of the C-H stretching bands at 2958, 2925, 2871, 2852 cm −1 , the =C-H stretching band at 3012 cm −1 , the CO 2 − symmetric stretching band at 1396 cm −1 and the N-H bend, C-N stretching at 1541 cm −1 ; (2) significant decrease in the intensity of the PO 2 − stretching band at 1238, 1080 cm −1 ; (3) the intensity of at 3303, 1652 and 1170 cm −1 remained relatively stable. The linear regression analysis of the various absorption intensity and area ratios against the PMI shows a close correlation, maximum for A 1541 /A 1396 ratio (R 2 = 0.95) and minimum for I 1080 /I 1396 ratio (R 2 = 0.70). Our results indicate that FT-IR spectroscopy may be a useful technique for estimating the short-and long-term PMI.

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“…For example, adsorbed water can be measured by Fourier-transform infrared spectroscopy by its infrared absorption at around 3400 and 1645 cm −1 (Goodman et al, 2001;Frinak et al, 2005;Ma et al, 2010a). However, it is nontrivial to convert infrared absorption intensity to the amount of adsorbed water (Schuttlefield et al, 2007a;Tang et al, 2016). Several previous studies have used quartz crystal microbalance (QCM) to measure deliquescence relative humidity (DRH) and mass hygroscopic growth of particles (Schuttlefield et al, 2007b;Arenas et al, 2012;Liu et al, 2016;Yeşilbaş and Boily, 2016).…”

mentioning

confidence: 99%

Investigation of water adsorption and hygroscopicity of atmospherically relevant particles using a commercial vapor sorption analyzer

Zhu

et al. 2017

Atmos. Meas. Tech.

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Abstract. Water adsorption and hygroscopicity are among the most important physicochemical properties of aerosol particles, largely determining their impacts on atmospheric chemistry, radiative forcing, and climate. Measurements of water adsorption and hygroscopicity of nonspherical particles under subsaturated conditions are nontrivial because many widely used techniques require the assumption of particle sphericity. In this work we describe a method to directly quantify water adsorption and mass hygroscopic growth of atmospheric particles for temperature in the range of 5-30 • C, using a commercial vapor sorption analyzer. A detailed description of instrumental configuration and experimental procedures, including relative humidity (RH) calibration, is provided first. It is then demonstrated that for (NH 4 ) 2 SO 4 and NaCl, deliquescence relative humidities and mass hygroscopic growth factors measured using this method show good agreements with experimental and/or theoretical data from literature. To illustrate its ability to measure water uptake by particles with low hygroscopicity, we used this instrument to investigate water adsorption by CaSO 4 · 2H 2 O as a function of RH at 25 • C. The mass hygroscopic growth factor of CaSO 4 · 2H 2 O at 95 % RH, relative to that under dry conditions (RH < 1 %), was determined to be (0.450 ± 0.004) % (1σ ). In addition, it is shown that this instrument can reliably measure a relative mass change of 0.025 %. Overall, we have demonstrated that this commercial instrument provides a simple, sensitive, and robust method to investigate water adsorption and hygroscopicity of atmospheric particles.

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Attenuated Total Reflection Fourier Transform Infrared Spectroscopy to Investigate Water Uptake and Phase Transitions in Atmospherically Relevant Particles

Cited by 74 publications

References 51 publications

Molecular events in deliquescence and efflorescence phase transitions of sodium nitrate particles studied by Fourier transform infrared attenuated total reflection spectroscopy

Molecular events in deliquescence and efflorescence phase transitions of sodium nitrate particles studied by Fourier transform infrared attenuated total reflection spectroscopy

Analysis of postmortem metabolic changes in rat kidney cortex using Fourier transform infrared spectroscopy

Investigation of water adsorption and hygroscopicity of atmospherically relevant particles using a commercial vapor sorption analyzer

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