Time-resolved Infrared Characterization on the Photolysis of Roussin's Red Phenyl Ester in Different Solvents

Yu, Yi Ju; Chiou, Tzung Wen; Yu, Jian‐Shen; Chu, Li Kang

doi:10.1016/j.jphotochem.2020.113032

Cited by 2 publications

(5 citation statements)

References 42 publications

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“…The experimental setup was slightly modified according to previous literature. ,, The aqueous mixtures were loaded in a 50 mL glass syringe pump (Legato110, KD Scientific) and pumped into the liquid cell at a speed of 4 μL s –1 . A Teflon tube with an outer diameter of 4.0 mm was used to connect the syringe and the demountable liquid cell (162-1100, PIKE TECHNOLOGIES), which was sealed by two CaF 2 windows separated by a Teflon spacer with a thickness of 0.05 mm defining the optical absorption path length.…”

Section: Methodsmentioning

confidence: 99%

Comparing the Reactivities of Methanol and Methanediol in the Photolysis of Aqueous Nitrite Solution

Jhao

Chu

2022

J. Phys. Chem. A

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Ultraviolet irradiation of aqueous nitrite (NO2 –) quickly generates hydroxyl (OH) and nitric oxide (NO) radicals, which are subsequently consumed concomitantly with the generation of N x O y species. Recently, dissolved formaldehyde (CH2O) in aqueous solution (e.g., methanediol, CH2(OH)2), has been regarded as the precursor in the formation of atmospheric formic acid (HCOOH) via the reaction with OH and cascading processes (Nature2021593233237). In this work, a step-scan Fourier transform interferometer was utilized to monitor the time-resolved difference infrared spectra of NaNO2 aqueous solution in the presences of methanediol and methanol upon pulsed irradiation at 355 nm. The fates of the dinitrogen trioxide (N2O3), generated via a series of reactions of OH, NO, and NO2 –, differed in the presences of CH2(OH)2 and CH3OH. The decay of N2O3 via hydrolysis with H2O was retarded more by CH3OH than by CH2(OH)2. The monohydroxyl group of CH3OH does not behave like the hydroxyl group of water, whereas the two hydroxyl groups of CH2(OH)2 can be treated as a water reservoir via the quick equilibrium between H2O and CH2O, further facilitating the hydrolytic solvation reaction of N2O3. The observed difference in reaction kinetics involving hydration should be thoroughly taken into consideration in formaldehyde-related aqueous reactions.

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Section: Methodsmentioning

confidence: 99%

Comparing the Reactivities of Methanol and Methanediol in the Photolysis of Aqueous Nitrite Solution

Jhao

Chu

2022

J. Phys. Chem. A

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“…[ [53][54][55], Fe-NO complex, Roussin's red phenyl ester (Fe 2 (μ-SPh) 2 (NO) 4 ) [56], and small molecule [57] have been altered in different organic solvents. The infrared features and the reactivities of MCp'(CO) 3 L (Cp' = cyclopentadienyl (η 5 -C 5 H 5 ) or indenyl (η 5 -C 9 H 7 ); M = Nb or Ta; L = n-heptane, H 2 or N 2 ) have been investigated via the photolysis of Cp'M(CO) 4 in n-heptane which contained solubilized CO, H 2 and N 2 .…”

Section: Photolysis Of Metal Complexes and Small Molecules In Various...mentioning

confidence: 99%

“…Upon the pulsed irradiation of Fe 2 (μ-SPh) 2 (NO) 4 at 355 nm, two depletion bands, attributed to the photolysis of the parent, can be observed at 1785 and 1760 cm À1 , in conjunction with the generation of new features in different solvent compositions [56]. In cyclohexane (cHex), a generated band at 1805 cm À1 can be attributed to the symmetric NO stretch of Fe 2 (μ-SPh) 2 (NO) 3 .…”

Section: Photolysis Of Metal Complexes and Small Molecules In Various...mentioning

confidence: 99%

“…In cyclohexane (cHex), a generated band at 1805 cm À1 can be attributed to the symmetric NO stretch of Fe 2 (μ-SPh) 2 (NO) 3 . However, in the oxygen-containing solvents, such as 1,4-dioxane (DX) and tetrahydrofuran (THF), the coordinate complexes Fe 2 (μ-SPh) 2 (NO) 3 (THF) and Fe 2 (μ-SPh) 2 (NO) 3 (DX) have been observed, as shown in Figure 3c [56]. Similarly, the photolytic products of thionyl chloride (Cl 2 SO) in the presence of THF contain the ClSO at 1155 cm À1 , the coordinated molecule, ClSO-THF complex, at 1054 cm À1 , and the ClSO dimer, (ClSO) 2 , at 1212 and 1173 cm À1 , as shown in Figure 3d [57].…”

Section: Photolysis Of Metal Complexes and Small Molecules In Various...mentioning

confidence: 99%

“…Other than the gaseous phenomena, ssFTIR has been extensively used to monitor the time-resolved infrared difference spectra of a given system in condensed phase upon various stimuli, such as the reorientation dynamics of liquid crystals upon electric perturbation [37,38], the molecular reorientation of a polymer upon mechanical stretching [39], and a rich variety of light-induced processes, such as photocycles of the various retinal proteins [40][41][42][43][44][45][46][47][48], the photolysis and excited-state properties of metal complexes [49][50][51][52][53][54][55][56], the photodissociation of small molecule [57], aqueous chemical reactions [58,59], the displacement dynamics of self-assembled molecules [60], and the exciplex dynamics of thermally activated delayed fluorescence (TADF) organic light emitting diodes [61]. In addition to the absorption mode, my research team has recently employed ssFTIR to probe the transient infrared thermal emission of gold nanostructures upon photoexcitation to characterize the thermalization in various nanostructures [62][63][64][65].…”

Section: Introductionmentioning

confidence: 99%

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Applications of time‐resolved step‐scan Fourier‐transform infrared spectroscopy in revealing the light‐initiated reactions in condensed phases

Chu

2023

J Chinese Chemical Soc

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Step‐scan Fourier‐transform infrared spectroscopy (ssFTIR) simultaneously provides the spectroscopic and kinetic information of a given reaction. ssFTIR has been extensively employed to acquire the transient absorption and emission spectra in gas phase for identifying unstable species, for example, various Criegee intermediates, and elucidating the dynamics and kinetics of the reaction, such as the molecular elimination dynamics of haloalkenes and the bimolecular reactions involving chlorine atoms and singlet oxygen atoms. In addition to gaseous studies, ssFTIR has been also utilized to record the time‐resolved difference spectra of the photochemical reactions in condensed phases, such as the photolysis of metal–ligand complexes, photocycles of the retinal proteins, coordination capability of solvents to unstable transient species, chemical reactions of atmosphere‐related molecules in aqua, and the exciplex dynamics of organic light emitting materials. Moreover, my group has pioneered the recording of the transient thermal infrared emission of gold nanostructures upon photoexcitation. The experimental setups and the working principles for probing the time‐resolved infrared absorption and emission in condensed phases will be revealed and a number of studies on chemical, biological, and materials systems will be described. These reported results demonstrate that ssFTIR is a versatile tool for exploring the properties of novel materials and photoreactions in condensed phases.

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Time-resolved Infrared Characterization on the Photolysis of Roussin's Red Phenyl Ester in Different Solvents

Cited by 2 publications

References 42 publications

Comparing the Reactivities of Methanol and Methanediol in the Photolysis of Aqueous Nitrite Solution

Comparing the Reactivities of Methanol and Methanediol in the Photolysis of Aqueous Nitrite Solution

Applications of time‐resolved step‐scan Fourier‐transform infrared spectroscopy in revealing the light‐initiated reactions in condensed phases

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