Tag: M.W=300-350

Tan, Wen-Juan published the artcileA photochromic diarylethene dyad based on perylene diimide, Recommanded Product: 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, the publication is Dyes and Pigments (2011), 89(3), 260-265, database is CAplus.

A new photochromic diarylethene dyad based on perylene diimide (PDI-DTE) was synthesized. The photochromic reaction of PDI-DTE induced the significant change of the absorption spectra and fluorescence intensity. The color of PDI-DTE in THF solution was not changed obviously upon UV irradiation, while the fluorescence intensity is increased unexpectedly with the photochromic cyclization of the diarylethene units. With not visible change of color accompanied to the enhanced fluorescence, PDI-DTE can be potentially applied to anti-counterfeiting technol.

Dyes and Pigments published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C8H8BNO2, Recommanded Product: 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Li, Ziyong published the artcileMulti-modulated photochromic behavior of a D-A type dithienylethene, Computed Properties of 219537-97-0, the publication is Dyes and Pigments (2019), 712-720, database is CAplus.

The development of multiresponsive photochromic materials is of increasing interest for their potential application in the complicated chem. and biol. environment. Here, a novel D-A type dithienylethene derivative NDM, in which dimethylamino group acted as both electron donor (D) and recognition moiety for H⁺, and the dicyanovinyl group functioned as electron acceptor (A) and responsed to cyanide anion, has been designed and synthesized. Its structure was confirmed by ¹H NMR, ¹³C NMR and HRMS (ESI). As expected, dithienylethene NDM exhibited distinctive multi-modulated photochromic properties by solvent, acid and cyanide anion stimulation. Moreover, NDM can be acted as a potential fluorescent turn-on pH-sensor and colorimetric sensor for CN^– in biol. field.

Dyes and Pigments published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C15H14Cl2S2, Computed Properties of 219537-97-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Fan, Jing published the artcileLight-Directing Omnidirectional Circularly Polarized Reflection from Liquid-Crystal Droplets, Safety of 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, the publication is Angewandte Chemie, International Edition (2015), 54(7), 2160-2164, database is CAplus and MEDLINE.

Constructing and tuning self-organized 3-dimensional (3D) superstructures with tailored functionality is crucial in the nanofabrication of smart mol. devices. A self-organized, phototunable 3D photonic superstructure was fabricated from monodisperse droplets of 1-dimensional cholesteric liquid crystal (CLC) containing a photosensitive chiral mol. switch with high helical twisting power. The droplets are obtained by a glass capillary microfluidic technique by dispersing into PVA solution that facilitates planar anchoring of the liquid-crystal mols. at the droplet surface, as confirmed by the observation of normal incidence selective circular polarized reflection in all directions from the core of individual droplet. Photoirradiation of the droplets furnishes dynamic reflection colors without thermal relaxation, whose wavelength can be tuned reversibly by variation of the irradiation time. The results provided clear evidence on the phototunable reflection in all directions.

Angewandte Chemie, International Edition published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C15H14Cl2S2, Safety of 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Zheng, Zhi-gang published the artcileThree-dimensional control of the helical axis of a chiral nematic liquid crystal by light, Name: 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, the publication is Nature (London, United Kingdom) (2016), 531(7594), 352-356, database is CAplus and MEDLINE.

Chiral nematic liquid crystals – otherwise referred to as cholesteric liquid crystals (CLCs) – are self-organized helical superstructures that find practical application in, for example, thermog., reflective displays, tuneable color filters and mirrorless lasing. Dynamic, remote and three-dimensional control over the helical axis of CLCs is desirable, but challenging. For example, the orientation of the helical axis relative to the substrate can be changed from perpendicular to parallel by applying an alternating-current elec. field, by changing the anchoring conditions of the substrate, or by altering the topog. of the substrate’s surface; sep., in-plane rotation of the helical axis parallel to the substrate can be driven by a direct-current field. Here we report three-dimensional manipulation of the helical axis of a CLC, together with inversion of its handedness, achieved solely with a light stimulus. We use this technique to carry out light-activated, wide-area, reversible two-dimensional beam steering-previously accomplished using complex integrated systems and optical phased arrays. During the three-dimensional manipulation by light, the helical axis undergoes, in sequence, a reversible transition from perpendicular to parallel, followed by in-plane rotation on the substrate surface. Such reversible manipulation depends on exptl. parameters such as cell thickness, surface anchoring condition, and pitch length. Because there is no thermal relaxation, the system can be driven either forwards or backwards from any light-activated intermediate state. We also describe reversible photocontrol between a two-dimensional diffraction state, a one-dimensional diffraction state and a diffraction ‘off’ state in a bilayer cell.

Nature (London, United Kingdom) published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C39H35N5O8, Name: 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Gao, Yadong published the artcileDirect synthesis of annulated indoles through palladium-catalyzed double alkylations, HPLC of Formula: 23616-79-7, the publication is Organic Chemistry Frontiers (2020), 7(9), 1149-1157, database is CAplus.

A facile, one-step synthesis of annulated indoles I [R = H, 2-Me, 7-F, etc.; R¹ = H, Me, Ph, etc.; n = 1,2,3] and II [R² = H; R²R³ = (CH₂)₄, (CH₂)₃CH(Me), (CH₂)₂NPh(CH₂)₂, etc.; R⁴ = H, 2-CN, 6-NO₂, etc.; R⁵ = H; R³R⁵ = (CH₂)₂NPh(CH₂)₂] from (N-H) indoles and dibromoalkanes was developed through a palladium-catalyzed double alkylation process. The reaction proceeded through a palladium-catalyzed norbornene-mediated C2-alkylation of indoles and subsequent regioselective cyclization. The detailed reaction mechanism was investigated by key intermediate experiments, NMR spectroscopic analyses and DFT calculations The results of a preliminary mechanistic study showed a catalytic cycle consisting of initial C2-alkylation of indoles that is followed by N-alkylation or palladium promoted intramol. C3-nucleophilic substitution to yield, resp., [a]- or [b]-annulated indoles.

Organic Chemistry Frontiers published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, HPLC of Formula: 23616-79-7.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Li, Ziyong published the artcileSynthesis, photophysical properties and NIR photochromism of photoresponsive difluoroboron β-diketonate complex based on dithienylethene unit, SDS of cas: 219537-97-0, the publication is Dyes and Pigments (2019), 597-603, database is CAplus.

The development of stimuli-responsive difluoroboron β-diketonate materials has attracted more and more attention for their potential application in optoelectronics and functional bio-materials. In this study, we have designed and synthesized a novel photoresponsive dithienylethene-containing difluoroboron β-diketonate complex 1 by Knoevenagel condensation reaction. Its structure have been confirmed by ¹H NMR, ¹³C NMR and HRMS (ESI). And it exhibited solvent-dependent photophys. properties in solution before visible light irradiation Subsequently, photochromism of 1 was investigated in solution, and it was found that 1 revealed solvent-dependent and visible light-triggered NIR photochromic behaviors. Moreover, it also displayed excellent fluorescence switching behavior and photochromism in the film state upon visible light irradiation Accordingly, the dithienylethene 1 may be acted as a novel visible light-responsive fluorescence dyes in optoelectronic materials.

Dyes and Pigments published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C15H14Cl2S2, SDS of cas: 219537-97-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Cahiez, Gerard published the artcileA user-friendly procedure for the preparation of secondary alkyl chlorides, Category: chlorides-buliding-blocks, the publication is Synthesis (2013), 45(2), 231-236, database is CAplus.

Secondary alkyl chlorides have been efficiently prepared from secondary alkyl sulfonates under mild and user-friendly conditions. The exchange reaction was generally performed by using benzyltributylammonium chloride in acetone (reflux, 30 min). Yields are excellent from functionalized, base-sensitive and hindered secondary alkyl sulfonates.

Synthesis published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Category: chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Bellina, Fabio published the artcileMild Pd/Cu-catalyzed sila-Sonogashira coupling of (hetero)aryl bromides with (hetero)arylethynylsilanes under PTC conditions, Name: N-Benzyl-N,N-dibutylbutan-1-aminium chloride, the publication is Synlett (2012), 23(5), 773-777, database is CAplus.

The palladium/copper cocatalyzed sila-Sonogashira reaction of (hetero)arylethynysilanes with (hetero)aryl bromides in toluene and water at 40 °C under PTC conditions gave the required di(hetero)arylethynes in moderate to high yields. Activated, deactivated and ortho-substituted (hetero)aryl bromides are well tolerated. This protocol also allowed the preparation of sym. diarylethynes by double arylation of 1,2-bis(trimethylsilyl)ethyne.

Synlett published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Name: N-Benzyl-N,N-dibutylbutan-1-aminium chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Wang, Sheng published the artcileA photochromic fluorescent probe for Hg2+ based on dithienylethene-rhodamine B dyad and its application in live cells imaging, Formula: C15H14Cl2S2, the publication is Science of Advanced Materials (2017), 9(3/4), 533-540, database is CAplus.

A new photoswitchable fluorescent mol. probe based on photochromic dithienylethene-rhodamine B dyad was designed and synthesized successfully. The dithienylethene-rhodamine B dyad exhibited excellent photochromism with reversible color changes upon photo-irradiation Upon addition of Hg2+, its color changed from colorless to red, and its fluorescence was remarkably enhanced; whereas, other ions including K+, Na+, Ag+, Ca2+, Mg2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+, Mn2+, Pb2+, Ni2+, Fe3+, Al3+, and Cr3+ induced basically no colorimetric and fluorescent color changes, which constituted a highly selective and sensitive fluorescent probe toward Hg2+. In addition, it exhibits unique fluorescent switching characteristics that can be controlled by Hg2+ and light stimuli. More importantly, by means of cells imaging experiments, it is demonstrated that this probe can enter living cells as a Hg2+ detector and respond to light stimuli, which shows its value for potential application in biol. systems.

Science of Advanced Materials published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C9H6FNO, Formula: C15H14Cl2S2.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Shu, Chang published the artcileSensitive and accurate detection of ALP activity using a fluorescence on-off-on switch and mass barcode signal amplification, Application of 2-Chlorotrityl chloride, the publication is RSC Advances (2018), 8(64), 36527-36533, database is CAplus and MEDLINE.

Alk. phosphatase (ALP) is an important biomarker for many diseases. Therefore, the sensitive and accurate detection of ALP activity is essential for fundamental biochem. processes and clinic diagnosis. Herein, we design a fluorescent on-off-on switch for sensitive and visual detection of ALP activity. Meanwhile, mass barcode-modified quantum dots (QDs) amplified the LC-MS/MS detection signal in complex biol. samples. Firstly, the QDs were modified with phosphorylated Gly-Gly-Phe-Phe-Tyr (OPO₃H₂) peptide (GGFFYp) and the mass barcode. The fluorescence of QDs-SS-Yp was quenched by fluorescence resonance energy transfer (FRET) between QDs-SS-Yp and dansyl chloride (DNS). ALP can hydrolyze the phosphorylated peptide to form peptide self-assemblies on the QDs-SS-Yp surfaces. The effective separation distance between the QDs-SS-Yp donor and DNS acceptor becomes larger, restricting FRET between the QDs-SS-Yp and DNS. At this point, the obvious QDs-SS-Yp fluorescence signal can be restored. However, the absence of ALP results in no peptide self-assembly on the QDs-SS-Yp surface and no obvious QDs-SS-Yp fluorescence signal was detected. Therefore, the ALP activity can be analyzed according to the degree of fluorescence restoration by the fluorescence on-off-on switch. Finally, the small tag mols. obtained by cleaving the disulfide bond of the QDs-SS-Yp as a mass barcode were used to amplify the LC-MS/MS detection signal. The proposed approach shows a good linear relationship (from 0.01 to 2.4 U L^-1) and has the significant advantage of a low detection limit of 0.001 U L^-1.

RSC Advances published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C25H23NO4, Application of 2-Chlorotrityl chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics