Category: 104-76-7

Qiu, Qianfeng; Yang, Sirun; Gerkman, Mihael A.; Fu, Heyifei; Aprahamian, Ivan; Han, Grace G. D. published the artcile< Photon Energy Storage in Strained Cyclic Hydrazones: Emerging Molecular Solar Thermal Energy Storage Compounds>, Computed Properties of 104-76-7, the main research area is photon energy storage strained cyclic hydrazones; mol solar thermal energy storage compound.

The generally small Gibbs free energy difference between the Z and E isomers of hydrazone photoswitches has so far precluded their use in photon energy storing applications. Here, we report on a series of cyclic and acyclic hydrazones, which possess varied degrees of ring strain and, hence, stability of E isomers. The photoinduced isomerization and concurrent phase transition of the cyclic hydrazones from a crystalline to a liquid phase result in the storage of a large quantity of energy, comparable to that of azobenzene derivatives We demonstrate that the macrocyclic photochrome design in combination with phase transition is a promising strategy for mol. solar thermal energy storage applications.

Journal of the American Chemical Society published new progress about Energy storage (solar). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Computed Properties of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Umeyama, Tomokazu; Igarashi, Kensho; Sasada, Daiki; Ishida, Keiichi; Koganezawa, Tomoyuki; Ohtani, Shunsuke; Tanaka, Kazuo; Imahori, Hiroshi published the artcile< Efficient Exciton Diffusion in Micrometer-Sized Domains of Nanographene-Based Nonfullerene Acceptors with Long Exciton Lifetimes in Blend Films with Conjugated Polymer>, Name: 2-Ethylhexan-1-ol, the main research area is exciton diffusion nanographene nonfullerene acceptor blend film conjugated polymer; exciton diffusion; nonfullerene acceptors; organic photovoltaics; phase separation; side chain; singlet exciton lifetime; thienoazacoronene.

Phase-separated structures in photoactive layers composed of electron donors and acceptors in organic photovoltaics (OPVs) generally exert a profound impact on the device performance. Nonfullerene acceptors (NFAs) where a heteronanographene central core was furnished with branched alkoxy chains of different lengths, TACIC-EH, TACIC-BO, and TACIC-HD, were prepared to adjust the aggregation tendency and systematically probe the relations of film structures with photophys. and photovoltaic properties. The side-chain length showed negligible effects on the absorption properties and energy levels of TACICs. Regardless of the chain length, all TACIC films exhibited characteristically long singlet exciton lifetimes (1330-2330 ps) compared to those in solution (≤220 ps). Using a conjugated polymer donor, PBDB-T, the best OPV performance was achieved with TACIC-BO that contained medium-length chains, exhibiting a power conversion efficiency (PCE) of 9.92%. TACIC-HD with the longest chains showed deteriorated electron mobility due to the long insulating alkoxy groups. The PBDB-T:TACIC-HD-based device revealed a low charge collection efficiency and PCE (8.21%) relative to the PBDB-T:TACIC-BO-based device, but their film morphols. were analogous. TACIC-EH with the shortest chains showed low solubility and formed μm-sized large aggregates in the blend film with PBDB-T. Although the charge collection efficiency of PBDB-T:TACIC-EH was lower than that of PBDB-T:TACIC-BO, the efficiencies of exciton diffusion to the donor-acceptor interface were sufficiently high (>98%) owing to the elongated singlet exciton lifetime of TACIC-EH. The PCE of the PBDB-T:TACIC-EH-based device remained moderate (7.10%). Therefore, TACICs with the long singlet exciton lifetimes in the films provide a clear guideline for NFAs with low sensitivity of OPV device performance to the blend film structures, which is advantageous for large-scale OPV production with high reproducibility.

ACS Applied Materials & Interfaces published new progress about Atomic force microscopy. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Name: 2-Ethylhexan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Angulo, Beatriz; Fraile, Jose M.; Gil, Laura; Herrerias, Clara I. published the artcile< Comparison of Chemical and Enzymatic Methods for the Transesterification of Waste Fish Oil Fatty Ethyl Esters with Different Alcohols>, Category: alcohols-buliding-blocks, the main research area is enzyme transesterification waste fish oil fatty ethyl ester alc.

Fatty acid esters of 2-ethyl-1-hexanol (EH), 2-hexyl-1-decanol (HD), and isopropanol have been obtained from a mixture of Et esters obtained as a fish oil byproduct. Homogeneous base catalysis with alk. hydroxides and alkoxides has been compared with the use of two com. available immobilized lipases. The enzymic methodol. is more efficient in the case of the largest alc. (HD) mainly because of the high stability of the immobilized enzymes upon recovery and reuse. In contrast, the use of a base as a catalyst is highly favorable in the case of isopropanol because of the rather poor activity of the lipases and the low price of the bases. With EH, the activity of lipases is good but the recoverability is not as efficient; hence, basic catalysts are again the most attractive alternative. The mixtures of esters obtained may be useful as hydraulic liquids given their viscosity values.

ACS Omega published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Xiu, Fu-Rong; Lu, Yongwei; Qi, Yingying published the artcile< DEHP degradation and dechlorination of polyvinyl chloride waste in subcritical water with alkali and ethanol: A comparative study>, Name: 2-Ethylhexan-1-ol, the main research area is polyvinyl chloride ethanol dechlorination diethylhexyl phthalate degradation wastewater treatment; DEHP; Degradation; PVC; Phthalic acid ester; Subcritical water.

In this study, subcritical water-NaOH (CW-NaOH) and subcritical water-C2H5OH (CW-C2H5OH) processes were developed for diethylhexyl phthalate (DEHP) degradation and dechlorination of polyvinyl chloride (PVC) waste. The introduction of NaOH or C2H5OH in subcritical water had a noticeable influence on the mechanism of DEHP degradation and dechlorination. For both CW-NaOH and CW-C2H5OH treatments, the increase in temperature could increase dechlorination efficiency (DE) of PVC. The DE of CW-NaOH is much higher than that of CW-C2H5OH under the same conditions. The DE of CW-NaOH could exceed 95% at 300°C. Hydroxyl nucleophilic substitution was the main dechlorination mechanism in CW-NaOH, while nucleophilic substitution and direct dehydrochlorination were equally important in CW-C2H5OH. In CW-NaOH treatment, 2-ethyl-1-hexanol, benzaldehyde, and toluene were obtained by hydrolysis and reduction reactions of DEHP. Acetophenone was produced by the further cyclization, dehydrogenation and rearrangement reactions of 2-ethyl-1-hexanol. Transesterification was the main degradation pathway of DEHP in CW-C2H5OH at 300°C. The cyclization and dehydration of 2-ethyl-1-hexanol resulted in producing a high level of ethyl-cyclohexane and 1-ethyl-cyclohexene in CW-C2H5OH at 350°C. Furthermore, high concentration of Et palmitate and Et stearate could be prepared in CW-C2H5OH system by the strong reactivity of C2H5OH with the lubricants in PVC.

Chemosphere published new progress about Cyclization. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Name: 2-Ethylhexan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Jung, Mun Yhung; Lee, Da Eun; Baek, Sun Hye; Lim, Su Min; Chung, Ill-Min; Han, Jae-Gu; Kim, Seung-Hyun published the artcile< An unattended HS-SPME-GC-MS/MS combined with a novel sample preparation strategy for the reliable quantitation of C8 volatiles in mushrooms: A sample preparation strategy to fully control the volatile emission>, Safety of 2-Ethylhexan-1-ol, the main research area is mushroom volatile HSSPMEGCMS freeze drying rehydration; Automation; Beech; Button; C8 volatiles; Gas chromatography; Headspace-solid phasemicroextraction; Mass spectrometry; Mushrooms; Quantitative analysis; Shiitake.

Eight carbon (C8) compounds are the key characteristic flavors of mushrooms. The quant. anal. of the volatiles in mushrooms is challenging especially with the unattended HS-SPME-GC-MS. An unattended HS-SPME-GC-MS/MS in combination with novel sample preparation of the complete control of volatile emissions was developed for the quantitation of the C8 volatiles in mushrooms. The sample preparation strategy was composed of freeze-drying, rehydration, and the addition of a 15% citric acid solution With this strategy, the volatile emission from mushroom was fully controlled at a certain time point. This method was found to be highly reliable, sensitive, precise, and accurate. This method was successfully applied to measure the contents of the C8 volatiles in the beech, button, and shiitake mushrooms. 1-Octene-3-ol was the most predominant compound in the mushrooms, representing 62.4, 69.0, and 89.2% of the total C8 volatiles in the beech, button, and shiitake mushrooms, resp.

Food Chemistry published new progress about Acrylic polymers Role: ARG (Analytical Reagent Use), MOA (Modifier or Additive Use), ANST (Analytical Study), USES (Uses). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Safety of 2-Ethylhexan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Rautiainen, Paavo; Hyttinen, Marko; Ruokolainen, Joonas; Saarinen, Pekka; Timonen, Jussi; Pasanen, Pertti published the artcile< Indoor air-related symptoms and volatile organic compounds in materials and air in the hospital environment>, HPLC of Formula: 104-76-7, the main research area is indoor air volatile organic compound material hospital environment; HVAC environ; VOC; indoor air pollution; material emissions; questionnaire.

In this case study, hospital workers did suffer from symptoms related to the poor indoor air quality. To investigate reasons for symptoms MM40-survey and house inspection methods were performed. The study consisted of 49 operating rooms and 470 employees. MM-40 survey revealed that over 40% of the staff suffered from skin reactions, over 50% had upper respiratory tract symptoms and 25% suffered headaches. No reason for the staff’s symptom could be found in the structural studies of workplaces. The mean air exchange rate of the rooms was 5.51/h. In total 61 materials and 49 indoor air samples were taken. The most frequently found compounds in the material samples were 2-ethyl-1-hexanol and aliphatic hydrocarbons. VOC emissions were high in some of the material samples and they presumably were the one reason for the workers’ symptoms observed in some in of the rooms. However, indoor air VOC concentrations were low in most of the cases. According to the linear regression model emissions from flooring material couldn’t explain the indoor air concentration of the VOCs. One reason for that was the high ventilation rates of the rooms, which presumably kept VOC levels in indoors low. In addition, VOC concentrations indoors were strongly related to the ongoing healthcare activities in the hospital.

International Journal of Environmental Health Research published new progress about Aliphatic hydrocarbons Role: PEP (Physical, Engineering or Chemical Process), PROC (Process). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, HPLC of Formula: 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hiessl, Robert; Hennecke, Leon; Plass, Carmen; Kleber, Joscha; Wahlefeld, Stefan; Otter, Rainer; Groeger, Harald; Liese, Andreas published the artcile< FTIR based kinetic characterisation of an acid-catalysed esterification of 3-methylphthalic anhydride and 2-ethylhexanol>, Recommanded Product: 2-Ethylhexan-1-ol, the main research area is methylphthalic anhydride ethylhexanol esterification kinetics FTIR spectra.

In this study, an inline anal. method was designed and applied in process characterization and development. The model reaction is the two-step diesterification of 3-methylphthalic anhydride with 2-ethylhexanol consisting of alcoholysis as the first step, followed by an acid-catalyzed, second esterification step leading to the corresponding diester. The final product is a potential, alternative plasticiser. For the inline measurements, attenuated total reflection Fourier transformed IR spectroscopy (ATR-FTIR) was implemented. In order to evaluate the spectra recorded during the reaction, a chemometric model was established. In this work, Indirect Hard Modeling (IHM), a non-linear modeling approach was employed. The resp. model was calibrated by using offline samples analyzed with gas (GC) and liquid chromatog. (HPLC). After successful validation of the chemometric model, the inline measurements were utilized for reaction characterization. The acid-catalyzed, second esterification step was identified as the limiting reaction step. From batch reactions conducted at different temperatures, the energy of activation of this step was determined to be 79.5 kJ mol-1. Addnl., kinetics were shown to follow a pseudo-first order with respect to the monoester formation and a kinetic model was established. The model was validated in simulations with changed reaction conditions.

Analytical Methods published new progress about Activation energy. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Recommanded Product: 2-Ethylhexan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Li-Hui; Tian, Ke; Wang, Gui-Rong; Xu, Xiang-Li; He, Ke-Hang; Liu, Wei; Wu, Jun-Xiang published the artcile< The general odorant receptor GmolOR9 from Grapholita molesta (Lepidoptera: Tortricidae) is mainly tuned to eight host-plant volatiles>, Related Products of 104-76-7, the main research area is host plant volatile grapholita molesta lepidoptera tortricidae; general odorant receptor GmolOR9; Grapholita molesta; odorant receptor; oriental fruit moth; volatiles.

Grapholita molesta is one of the most destructive fruit pests distributed worldwide. Odorant receptors (ORs) located on the dendritic membrane of chemosensory neurons are deemed to be key mols. for sensing exogenous chem. signals. In this study, GmolOR9, a general OR from G. molesta, was functionally characterized. Quant. real-time polymerase chain reaction revealed that GmolOR9 was more highly expressed in adults than in other stages, including eggs, larvae, and pupae. GmolOR9 expression was highly significantly more in the antennae of females than in those of males, and the highest level occurred in the antennae of 3-day-old female adults. GmolOR9 was broadly tuned to eight of 47 odorant components tested, including (Z)-3-hexenyl acetate, Bu propionate, Et hexanoate, Et heptanoate, 1-hexanol, (Z)-3-hexenol, 2-ethyl-1-hexanol, and linalool, by in vitro heterologous expression. Furthermore, electroantennogram responses indicated that the effects of dsOR9-injected females to (Z)-3-hexenyl acetate dramatically decreased. These results suggested that GmolOR9 might be involved in detecting host-plant volatiles. Moreover, (Z)-3-hexenyl acetate might serve as a potential attractant for the biol. control of G. molesta.

Insect Science published new progress about Antenna (anatomical). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Related Products of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yu, Haiyan; Xie, Tong; Xie, Jingru; Ai, Lianzhong; Tian, Huaixiang published the artcile< Characterization of key aroma compounds in Chinese rice wine using gas chromatography-mass spectrometry and gas chromatography-olfactometry>, Application In Synthesis of 104-76-7, the main research area is Chinese rice wine aroma compounds GC MS olfactometry; Chinese rice wine; Gas chromatography–mass spectrometry; Gas chromatography–olfactometry; Key aroma compounds; Partial least squares regression.

To determine the key aroma compounds in Chinese rice wine (CRW), four types of CRW (YH, JF, SN, and XX) were analyzed by gas chromatog.-mass spectrometry (GC-MS), gas chromatog.-olfactometry (GC-O), and sensory evaluation. The contributions of the key aroma compounds to the flavor characteristics were determined by partial least squares regression. Sixty-one aroma compounds were detected. Twenty-five components were identified as odor-active compounds On the basis of their odor active values, 18 odor-active compounds were determined as key aroma compounds Et isovalerate, Et butyrate, Et acetate, Et hexanoate, and phenylethyl alc. were key aroma compounds in all four types of wine. The unique key aroma compounds of JF wine were isovaleraldehyde and isoamyl acetate; those of XX wine were 1-butanol, benzaldehyde, Et benzoate, Et phenylacetate, 2-octanone, and furfural; that of YH wine was Et 2-methylbutyrate; and those of SN wine were 1-butanol, 1-hexanol, 2-butenoic acid Et ester, and 3-methyl-1-butanol.

Food Chemistry published new progress about Gas chromatography (combined with olfactometry). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Application In Synthesis of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Bierwirth, S. Peter; Honorio, Gabriel; Gainaru, Catalin; Boehmer, Roland published the artcile< Linear and nonlinear shear studies reveal supramolecular responses in supercooled monohydroxy alcohols with faint dielectric signatures>, Category: alcohols-buliding-blocks, the main research area is supercooled monohydroxy alc dielec loss.

Monohydroxy alcs. (MAs) with Me and hydroxyl side groups attached to the same carbon atom in the alkyl backbone can display very weak structural and supramol. dielec. relaxation processes when probed in the regime of small elec. fields. This can render their separation and assignment difficult in the pure liquids When mixing with bromoalkanes, a faint Debye-like process can be resolved dielec. for 4-methyl-4-heptanol. To achieve a separation of structural and supramol. processes in pure 4-methyl-4-heptanol and 3-methyl-3-heptanol, mech. experiments are carried out in the linear-response regime as well as using medium-angle oscillatory shear amplitudes. It is demonstrated that first-order and third-order nonlinear mech. effects allow for a clear identification of supramol. viscoelastic modes even for alcs. in which they leave only a weak signature in the linear-response shear modulus. Addnl., the nonlinear rheol. behavior of 2-ethyl-1-hexanol is studied, revealing that its linearly detected terminal mode does not coincide with that revealed beyond the linear-response regime. This finding contrasts with those for the other MAs studied in this work. (c) 2019 American Institute of Physics.

Journal of Chemical Physics published new progress about Dielectric loss. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts