Tag: 100-200

On February 19, 2020, Zhang, Shiyue; Li, Xiaohan; Gong, Weitao; Sun, Tianjun; Wang, Zhonggang; Ning, Guiling published an article.Electric Literature of 150-78-7 The title of the article was Pillar[5]arene-Derived Microporous Polyaminal Networks with Enhanced Uptake Performance for CO2 and Iodine. And the article contained the following:

A new nitrogen-rich microporous polymer (PAN-FPP5) containing pillar[5]arene macrocycles was fabricated via facile polycondensation between pillar[5]arene-based monomer (FPP5) bearing two aldehyde moieties and melamine. Compared with the macrocycle-free category, PAN-FPP5 exhibited superior CO2 uptake (12.5 wt % vs 9.9 wt %, 273 K/1 bar) and selectivity of CO2/N2 (55.6 vs 39.9, 298 K). In addition, PAN-FPP5 also displayed an excellent capability of removal of iodine in both solvent and vapor phases because of the electron-rich property of pillar[5]arene. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Electric Literature of 150-78-7

The Article related to pillararene microporous polyaminal network iodine carbon dioxide uptake adsorption, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Electric Literature of 150-78-7

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Ji, Jiecheng; Li, Yizhou; Xiao, Chao; Cheng, Guo; Luo, Kui; Gong, Qiyong; Zhou, Dayang; Chruma, Jason J.; Wu, Wanhua; Yang, Cheng published an article in 2020, the title of the article was Supramolecular enantiomeric and structural differentiation of amino acid derivatives with achiral pillar[5]arene homologs.Name: 1,4-Dimethoxybenzene And the article contains the following content:

Complexation of achiral pillar[5]arenes with chiral amines induced strong CD signals. The CD responses differed drastically depending on the nature of the amino acid guest, and they significantly varied and part of them even inverted, upon increasing the length of the alkyl chains of the pillar[5]arenes guests. Accordingly, this tactic allowed for the unprecedented simultaneous enantiomeric and structural differentiation of α-amino esters with homologous mol. hosts. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Name: 1,4-Dimethoxybenzene

The Article related to amino acid pillararene inclusion reaction crystal structure cd fluorescence, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Name: 1,4-Dimethoxybenzene

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Jin, Jianbing; Miao, Jiarong; Cheng, Chuyang published an article in 2021, the title of the article was Mono-mercapto-functionalized pillar[5]arene: a host-guest complexation accelerated reversible redox dimerization.Reference of 1,4-Dimethoxybenzene And the article contains the following content:

A mono-mercapto-functionalized pillar[5]arene and its dimer, capable of being reversibly interconverted, were successfully synthesized. Fascinatingly, a faster reversible redox conversion involving a dynamic disulfide bond was observed between their host-guest complexes compared with the hosts themselves. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Reference of 1,4-Dimethoxybenzene

The Article related to mercapto pillararene preparation inclusion reaction dimerization kinetics, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Reference of 1,4-Dimethoxybenzene

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On January 4, 2021, Al Mamari, Hamad H.; Al Harrasi, Iman; Suliman, Fakhreldin O. published an article.Related Products of 150-78-7 The title of the article was An Investigation into Interactions between 1-Butyl-3-methyl-imidazolium Tetrafluoroborate Guest and Pillar[5]arene Hosts: An Experimental and Molecular Dynamics Approach. And the article contained the following:

Various synthesized Pillar[5]arene macrocycles were allowed to form complexes with the ionic liquid; 1-Butyl-3-methyl-imidazolium tetrafluoroborate (IL). The pillar[5]arenes used in the study were synthesized by the established pioneering method of Ogoshi that involves treatment of 1,4-disubstituted benzenes with paraformaldehyde in the presence of BF3.OEt2. Selected synthesized pillar[5]arenes; DMpillar[5]arene (4a), DPpillar[5]arene (4b), DPGpillar[5]arene (4c) were allowed to form complexes with the ionic liquid, and complexations were confirmed by MALDI-TOF, ESI-MS, 1H NMR, and DOSY spectroscopy. ESI-MS reveals highly intense ion peaks that correspond to [pillar[5]arene+IL]+ for the complexes of the three pillar[5]arenes with the ionic liquid Changes in characteristic peaks in hosts and guests, as a result of complexation, were studied by 1H NMR. Results obtained suggest a formation of 1 : 1 complexes between the pillar[5]arene host and the IL guest. Host-guest interactions in such complexes have also been studied using 1H-1H 2D ROESY NMR spectroscopy. Obtained through-space correlations revealed interactions between certain parts of the pillar[5]arene hosts and the ionic liquid The complexation between the three pillar[5]arenes and the IL was studied by mol. dynamics (MD) simulations. The obtained results suggest the insertion of the IL inside the nanocavities of the hosts. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Related Products of 150-78-7

The Article related to butyl methylimidazolium tetrafluoroborate pillararene inclusion reaction, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Related Products of 150-78-7

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On December 31, 2022, Pearce, Nicholas; Reynolds, Katherine E. A.; Kayal, Surajit; Sun, Xue Z.; Davies, E. Stephen; Malagreca, Ferdinando; Schurmann, Christian J.; Ito, Sho; Yamano, Akihito; Argent, Stephen P.; George, Michael W.; Champness, Neil R. published an article.Reference of 1,4-Dimethoxybenzene The title of the article was Selective photoinduced charge separation in perylenediimide-pillar[5]arene rotaxanes. And the article contained the following:

The ability to control photoinduced charge transfer within mols. represents a major challenge requiring precise control of the relative positioning and orientation of donor and acceptor groups. Here we show that such photoinduced charge transfer processes within homo- and hetero-rotaxanes can be controlled through organization of the components of the mech. interlocked mols., introducing alternative pathways for electron donation. Specifically, studies of two rotaxanes are described: a homo[3]rotaxane, built from a perylenediimide diimidazolium rod that threads two pillar[5]arene macrocycles, and a hetero[4]rotaxane in which an addnl. bis(1,5-naphtho)-38-crown-10 (BN38C10) macrocycle encircles the central perylenediimide. The two rotaxanes are characterized by a combination of techniques including electron diffraction crystallog. in the case of the hetero[4]rotaxane. Cyclic voltammetry, spectroelectrochem., and EPR spectroscopy are employed to establish the behavior of the redox states of both rotaxanes and these data are used to inform photophys. studies using time-resolved infra-red (TRIR) and transient absorption (TA) spectroscopies. The latter studies illustrate the formation of a symmetry-breaking charge-separated state in the case of the homo[3]rotaxane in which charge transfer between the pillar[5]arene and perylenediimide is observed involving only one of the two macrocyclic components. In the case of the hetero[4]rotaxane charge separation is observed involving only the BN38C10 macrocycle and the perylenediimide leaving the pillar[5]arene components unperturbed. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Reference of 1,4-Dimethoxybenzene

The Article related to pillararene peylenediimide rotaxane preparation electron transfer esr, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Reference of 1,4-Dimethoxybenzene

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On October 31, 2020, Ivancev-Tumbas, Ivana; Landwehrkamp, Lucas; Hobby, Ralph; Vernillo, Marco; Panglisch, Stefan published an article.Name: 2-Methoxynaphthalene The title of the article was Adsorption of organic pollutants from the aqueous phase using graphite as a model adsorbent. And the article contained the following:

Although graphite is not effective as an adsorbent in water treatment, it provides a homogenous, non-porous, carbonaceous structure that is ideal for studying fundamental adsorption mechanisms. High-purity graphite powder (C content 99.5%) was oxidized in an ozone stream, producing a near-surface oxygen content of 5.9 at.%, and was used together with the virgin material to establish adsorption isotherms for organic compounds in aqueous solutions We examined how the aromaticity and substituents of the adsorptives affect adsorption on the model-activated carbon surface. For both virgin and oxidized graphite, the adsorption capacity for the aromatic compounds decreased in the order 1-naphthol > 2-methoxynaphthalene > naphthalene > anisole > phenol, with significant differences in the adsorption capacities of the two graphite species observed only for anisole, naphthalene, and 1-naphthol. The Freundlich constantsfor the five compounds on virgin graphite were 23.9, 10.3, 5.5, 1.4, and 0.8 (nmol mg-1 )/(μmol L-1)n, resp. Naphthalene and 1-naphthol were slightly more adsorbed on the virgin material, whereas oxidized graphite had marginally better adsorption properties for anisole. The results underline the importance of dispersive and Π-Π interactions in the adsorption of organic compounds on carbonaceous adsorbents; a second aromatic ring in 1-naphthol and 2-methoxynaphthalene greatly increased the adsorption capacity for these compounds compared with their one-ring counterparts phenol and anisole. Differences were also observed in the adsorption of compounds containing hydroxyl or methoxy substituents, which have electron-donating properties (a resonance effect) but different electron-withdrawal characteristics (caused by induction). Two amino acids occurring as zwitterions, L-tryptophan and L-tyrosine, were also tested as adsorptives. L-Tryptophan, which has a larger aromatic system, achieved higher loading on graphite, suggesting an adsorption mechanism primarily governed by dispersive and Π-Π interactions for these two ionic compounds as well. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Name: 2-Methoxynaphthalene

The Article related to graphite activated carbon adsorption mechanism organic pollutant, Water: Water Purification (Including Treatment For Industrial Uses) and other aspects.Name: 2-Methoxynaphthalene

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On September 4, 2020, Li, Jing; Han, Xiao-Ni; Zhou, He-Ye; Han, Ying; Chen, Chuan-Feng published an article.Recommanded Product: 150-78-7 The title of the article was Helic[1]triptycene[3]arene: Synthesis, Complexation, and Formation of [2]Rotaxane Shuttle. And the article contained the following:

A new macrocyclic arene, helic[1]triptycene[3]arene H, was conveniently synthesized in 37% yield by a one-pot reaction starting from 2,6-dimethoxyl-3,7-dihydroxymethyltriptycene. Macrocycle H showed fixed conformation in solution and could form 1:1 complexes with a series of neutral guests, secondary ammonium salts, and tertiary ammonium salts in both solution and solid states. The association constants between H and the neutral guests were between (1.23 ± 0.10) x 102 and (4.70 ± 0.47) x 103 M-1, while the association constants between H and the ammonium guests were between (1.35 ± 0.12) x 103 and (1.59 ± 0.14) x 105 M-1. Moreover, H showed bigger association constants with secondary ammonium salts than those with tertiary ammonium salts possibly because of the steric hindrance effect and multiple intermol. interactions. The stimuli-responsive complexation between H and the ammonium salts could be controlled by the addition and removal of acids and bases as well. Based on the host-guest complexation between H and the secondary ammonium salt, [2]rotaxane was further synthesized, and its shuttling motion could be efficiently controlled by an acid and base. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Recommanded Product: 150-78-7

The Article related to helic triptycenearene preparation guest binding rotaxane shuttle, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Recommanded Product: 150-78-7

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Wang, Haiying; Yang, Weiwei; Baldridge, Kim K.; Zhan, Cai-Hong; Thikekar, Tushar Ulhas; Sue, Andrew C.-H. published an article in 2021, the title of the article was Spontaneous and induced chiral symmetry breaking of stereolabile pillar[5]arene derivatives upon crystallisation.Related Products of 150-78-7 And the article contains the following content:

Stereolabile pillar[5]arene (P[5]) derivatives, which are dynamic racemic mixtures in solution on account of their low inversion barriers, were employed as platforms to study chiral symmetry breaking during crystallization In the solid state, we showed that crystal enantiomeric excess of a conglomerate-forming P[5] derivative can be obtained by handpicking and Viedma ripening without the intervention of external chiral entities. On the other hand, in the presence of Et D/L-lactate as both optically-active solvents and chiral guests, the handedness of P[5] derivative crystals, either forming racemic compounds or conglomerates upon condensation, can be directed and subsequently inverted in a highly controllable manner. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Related Products of 150-78-7

The Article related to pillararene preparation cd crystal structure inclusion reaction, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Related Products of 150-78-7

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On March 15, 2021, Aniceto, Jose P. S.; Zezere, Bruno; Silva, Carlos M. published an article.Related Products of 321-28-8 The title of the article was Machine learning models for the prediction of diffusivities in supercritical CO2 systems. And the article contained the following:

The mol. diffusion coefficient is fundamental to estimate dispersion coefficients, convective mass transfer coefficients, etc. Since exptl. diffusion data is scarce, there is significant demand for accurate models capable of providing reliable diffusion coefficient estimations In this work we applied machine learning algorithms to develop predictive models to estimate diffusivities of solutes in supercritical carbon dioxide. A database of exptl. data containing 13 properties for 174 binary systems totaling 4917 data points was used in the training of the models. Five machine learning algorithms were evaluated and the results were compared with three commonly used classic models. The best results were found using the Gradient Boosted algorithm which showed an average absolute relative deviation (AARD) of 2.58% (pure prediction). This model has five parameters: temperature, d., solute molar mass, solute critical pressure and solute acentric factor. For the same dataset, the classic Wilke-Chang equation showed AARD of 12.41%. The developed model is provided as command line program. The experimental process involved the reaction of 1-Fluoro-2-methoxybenzene(cas: 321-28-8).Related Products of 321-28-8

The Article related to carbon dioxide supercritical system machine learning diffusivity, Phase Equilibriums, Chemical Equilibriums, and Solutions: Fused Salts and other aspects.Related Products of 321-28-8

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Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On March 15, 2021, Aniceto, Jose P. S.; Zezere, Bruno; Silva, Carlos M. published an article.HPLC of Formula: 578-58-5 The title of the article was Machine learning models for the prediction of diffusivities in supercritical CO2 systems. And the article contained the following:

The mol. diffusion coefficient is fundamental to estimate dispersion coefficients, convective mass transfer coefficients, etc. Since exptl. diffusion data is scarce, there is significant demand for accurate models capable of providing reliable diffusion coefficient estimations In this work we applied machine learning algorithms to develop predictive models to estimate diffusivities of solutes in supercritical carbon dioxide. A database of exptl. data containing 13 properties for 174 binary systems totaling 4917 data points was used in the training of the models. Five machine learning algorithms were evaluated and the results were compared with three commonly used classic models. The best results were found using the Gradient Boosted algorithm which showed an average absolute relative deviation (AARD) of 2.58% (pure prediction). This model has five parameters: temperature, d., solute molar mass, solute critical pressure and solute acentric factor. For the same dataset, the classic Wilke-Chang equation showed AARD of 12.41%. The developed model is provided as command line program. The experimental process involved the reaction of 2-Methylanisole(cas: 578-58-5).HPLC of Formula: 578-58-5

The Article related to carbon dioxide supercritical system machine learning diffusivity, Phase Equilibriums, Chemical Equilibriums, and Solutions: Fused Salts and other aspects.HPLC of Formula: 578-58-5

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem