Month: November 2022

On March 18, 2004, Whiteford, Jeffery A.; Buretea, Mihai A.; Scher, Erik C. published a patent.Related Products of 146370-51-6 The title of the patent was Organic species that facilitate charge transfer to or from nanostructures. And the patent contained the following:

The present invention provides compositions (small mols., oligomers and polymers) that can be used to modify charge transport across a surface or a nanostructure (e.g., nanocrystal) surface, or within a nanostructure (e.g., nanocrystal)containing matrix, as well as methods for making and using the novel compositions The compositions contain a conjugated organic species and at least one binding group capable of interacting with a nanostructure (e.g., nanocrystal) surface; during use, the compositions are coupled via the binding group to the nanostructure (e.g., nanocrystal) surface, such that the compositions are substantially conductive to electrons and/or holes being transported by/through the nanostructure (e.g., nanocrystal) (e.g., during the process of extracting or injecting the electrons or holes). The compositions of the present invention can optionally be derivatized with addnl. chem. groups, e.g., to enhance the electronic conjugation of the core organic species, to couple adjacent nanostructures (e.g., nanocrystals), or to facilitate dispersion, mixing and/or blending of nanostructures (e.g., nanocrystals) in various matrixes. In one aspect, the present invention provides conductive compositions for modification of charge transport across a nanostructure (e.g., nanocrystal)containing matrix. The conductive composition typically include (1) a conjugated organic moiety as the body structure, or core of the conductive mol.; (2) a nanostructure (e.g., nanocrystal) binding head group coupled to the body structure at a 1st position on the conjugated organic moiety; and (3) a tail group coupled to the body structure at a 2nd position on the conjugated organic moiety. After formation of an exciton in the nanostructure (e.g., nanocrystal) containing matrix, the conductive composition facilitates the injection and/or extraction of charge (electron and/or hole) with respect to the attached nanostructure, thereby modifying charge transport across a nanostructure-containing matrix. The experimental process involved the reaction of 1-((2-Ethylhexyl)oxy)-4-methoxybenzene(cas: 146370-51-6).Related Products of 146370-51-6

The Article related to charge transfer mol electronic device nanocrystal, Electric Phenomena: Conductors, Semiconductors, Resistors, Contacts and other aspects.Related Products of 146370-51-6

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

On July 31, 2022, Earley, J. D.; Zieleniewska, A.; Ripberger, H. H.; Shin, N. Y.; Lazorski, M. S.; Mast, Z. J.; Sayre, H. J.; McCusker, J. K.; Scholes, G. D.; Knowles, R. R.; Reid, O. G.; Rumbles, G. published an article.Safety of 1,4-Dimethoxybenzene The title of the article was Ion-pair reorganization regulates reactivity in photoredox catalysts. And the article contained the following:

Cyclometalated and polypyridyl complexes of d6 metals are promising photoredox catalysts, using light to drive reactions with high kinetic or thermodn. barriers via the generation of reactive radical intermediates. However, while tuning of their redox potentials, absorption energy, excited-state lifetime and quantum yield are well-known criteria for modifying activity, other factors could be important. Here we show that dynamic ion-pair reorganization controls the reactivity of a photoredox catalyst, [Ir[dF(CF3)ppy]2(dtbpy)]X. Time-resolved dielec.-loss experiments show how counter-ion identity influences excited-state charge distribution, evincing large differences in both the ground- and excited-state dipole moment depending on whether X is a small associating anion (PF6-) that forms a contact-ion pair vs. a large one that either dissociates or forms a solvent-separated pair (BArF4-). These differences correlate with the reactivity of the photocatalyst toward both reductive and oxidative electron transfer, amounting to a 4-fold change in selectivity toward oxidation vs. reduction These results suggest that ion pairing could be an underappreciated factor that modulates reactivity in ionic photoredox catalysts. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Safety of 1,4-Dimethoxybenzene

The Article related to iridium complex photoredox catalyst counter ion effect, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Safety of 1,4-Dimethoxybenzene

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

On October 31, 2007, Al-Hamarneh, Ibrahim F.; Pedrow, Patrick D.; Goheen, Steven C.; Hartenstine, Michael J. published an article.SDS of cas: 929-37-3 The title of the article was Impedance spectroscopy study of composite thin films of hydrated polyethylene glycol. And the article contained the following:

A polyethylene glycol (PEG) polymer was synthesized using a dip-coating procedure on 316L stainless-steel (SS) substrate precoated with a primer that consisted of radio-frequency inductively coupled plasma-polymerized di(ethylene glycol) vinyl ether (EO2V). The primer and PEG composite film was studied with profilometer, optical microscope, scanning electron microscope (SEM), and a tape test to evaluate thickness, coverage, morphol., and adhesion, resp. Response of the PEG composite film to an applied ac voltage was studied as a function of hydration state using impedance spectroscopy (IS). A resistor/capacitor network was used to interpret the impedance spectra. Elec. capacitance of the PEG film decreased with an exponentially decaying term as dehydration progressed. PEG-film capacitance decay was consistent with a model describing water mols. diffusing through the PEG film. The experimental process involved the reaction of 2-(2-(Vinyloxy)ethoxy)ethanol(cas: 929-37-3).SDS of cas: 929-37-3

The Article related to hydrated polyethylene glycol composite thin film impedance, Electric Phenomena: Conductors, Semiconductors, Resistors, Contacts and other aspects.SDS of cas: 929-37-3

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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