Month: December 2022

Feng, Li-Heng published the artcileHighly selective recognition of monosaccharide based on two-component system in aqueous solution, Computed Properties of 2960-93-2, the publication is Tetrahedron (2011), 67(18), 3175-3180, database is CAplus.

A highly selective switch for D-fructose was formed by water-soluble conjugated polymer (PP-S-BINOL) and tetraboronic acid-functionalized benzyl viologen (ToBV). The two-component system showed a high selectivity and sensitivity only for D-fructose in familiar D-monosaccharides. The high selectivity of the sensing system for D-fructose may be depended on stable pyranose ester form of D-fructose with ToBV. A desirable linear response of the sensing system to low concentrations of D-fructose (<10.0 mM) was observed with 0.9936 linear dependent coefficient at pH 7.4.

Tetrahedron published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, Computed Properties of 2960-93-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Lin, Ching-Yao published the artcilePreparation and Spectral, Electrochemical, and Photovoltaic Properties of Acene-Modified Zinc Porphyrins, Recommanded Product: 9,10-Diethynylanthracene, the publication is Journal of Physical Chemistry C (2010), 114(1), 687-693, database is CAplus.

Acene-modified Zn porphyrins (I; E = 1,4-phenylene, 1,4-naphthalenediyl, 9,10-anthacenediyl, 5,12-tetracenediyl, 6,13-pentacenediyl, denoted as LAC-1 to LAC-5, resp.) were prepared to study their absorption spectra, electrochem. properties, and photovoltaic properties. For the absorption spectral changes in THF, porphyrin B bands are red shifted and broadened from 449 to 501 nm for LAC-1 to LAC-3, showing the effect of addnl. π-conjugation. In contrast, the B bands of LAC-4 and LAC-5 are blue-shifted. The tetracenyl group of LAC-4 gives rise to absorption bands in between B and Q bands. However, the Q bands of LAC-1 to LAC-5 are systematically broadened and red shifted from 629 to 751 nm. By comparison, the absorption bands of LAC porphyrins on TiO₂ films are broadened and slightly shifted. Fluorescence emission maxima of LAC porphyrins in THF are also systematically red shifted from LAC-1 to LAC-5. Cyclic voltammetry experiments in THF/TBAP show that the 1st reductions are systematically pos.-shifted from -1.16 to -0.85 V vs. SCE for LAC-1 to LAC-5, indicating the effect of increasing π-conjugation. As for the performance of DSSCs using LAC porphyrins, the overall efficiencies are LAC-1 (2.95%), LAC-2 (3.31%), LAC-3 (5.44%), LAC-4 (2.82%), and LAC-5 (0.10%). Overall efficiency of a LAC-3-sensitized solar cell is nearly twice of that of a LAC-1-sensitized solar cell and is âˆ?1% overall efficiency of N719-sensitized solar cells under the same exptl. conditions. The conversion efficiency of incident photons to current (IPCE) experiments shows that the broadened absorption bands of LAC-3 effectively minimizes the gap between B and Q bands, contributing to the improved DSSC performance. The very poor performance of LAC-5 probably is caused by rapid nonradiative relaxation of the mol. in the singlet excited state.

Journal of Physical Chemistry C published new progress about 18512-55-5. 18512-55-5 belongs to naphthyridine, auxiliary class Alkynyl,Anthracene, name is 9,10-Diethynylanthracene, and the molecular formula is C18H10, Recommanded Product: 9,10-Diethynylanthracene.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Wang, Dinghui published the artcileA Fluorescent Linear Conjugated Polymer Constructed from Pillararene and Anthracene, Formula: C18H10, the publication is Molecules (2022), 27(10), 3162, database is CAplus and MEDLINE.

Over the past few years, conjugated polymers (CPs) have aroused much attention owing to their rigid conjugated structures, which can perform well in light harvesting and energy transfer and offer great potential in materials chem. In this article, we fabricate a new luminescent linear CP p(P[5](OTf)₂-co-9,10-dea) via the Sonogashira coupling of 9,10-diethynylanthracene and trifluoromethanesulfonic anhydride (OTf) modified pillar[5]arene, generating enhanced yellow-green fluorescence emission at around 552 nm. The reaction condition was screened to get a deeper understanding of this polymerization approach, resulting in an excellent yield as high as 92% ultimately. Besides the optical properties, self-assembly behaviors of the CP in low/high concentrations were studied, where interesting adjustable morphologies from tube to sheet were observed In addition, the fluorescence performance and structural architecture can be disturbed by the host-guest reorganization between the host CP and the guest adiponitrile, suggesting great potential of this CP material in the field of sensing and detection.

Molecules published new progress about 18512-55-5. 18512-55-5 belongs to naphthyridine, auxiliary class Alkynyl,Anthracene, name is 9,10-Diethynylanthracene, and the molecular formula is C17H14F3N3O2S, Formula: C18H10.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Chen, Qi published the artcileSpiro(fluorene-9,9′-xanthene)-Based Porous Organic Polymers: Preparation, Porosity, and Exceptional Hydrogen Uptake at Low Pressure, Name: Spiro[fluorene-9,9′-xanthene], the publication is Macromolecules (Washington, DC, United States) (2011), 44(20), 7987-7993, database is CAplus.

Preparation and sorption properties of spiro(fluorene-9,9′-xanthene)-based porous organic polymers (SPOPs) are reported. Using a same linker monomer, the micropore size and sp. surface area in SPOPs are tunable by variation of the structure of core building blocks. According to the obtained nitrogen physisorption isotherms, the Brunauer-Emmett-Teller sp. surface area for these polymers varies between 750 and 1020 m²/g. Copolymer SPOP-3 containing spiro(fluorene-9,9′-xanthene) and spirobifluorene with 1:1 ratio, prepared by Suzuki coupling polymerization, possesses 2.22 weight% hydrogen adsorption capacity at 1.0 bar and 77 K, which not only is the exceptional uptake capacity for hydrogen at low pressure among the best reported results for organic polymers but also can be competitive with other kinds of porous materials such as activated carbons and metal-organic frameworks.

Macromolecules (Washington, DC, United States) published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C25H16O, Name: Spiro[fluorene-9,9′-xanthene].

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Chu, Zengze published the artcileSynthesis of Dendritic Oligo-Spiro(fluorene-9,9′-xanthene) Derivatives with Carbazole and Fluorene Pendants and their Thermal, Optical, and Electroluminescent Properties, SDS of cas: 159-62-6, the publication is Macromolecular Rapid Communications (2009), 30(20), 1745-1750, database is CAplus and MEDLINE.

Two novel spiro-configured ter(arylene-ethynylene) derivatives, TSF-Cz and TSF-F, were designed and synthesized using spiro(fluorene-9,9′-xanthene) (SFX) as building blocks, introducing a hole-transporting carbazole and a fluorene chromophore as the peripheral functional group into the backbone through an O atom. The 2 well-defined oligomers possess good solubility, film-forming quality, and high T_g‘s at 140 and 126°, resp. These oligomers exhibit blue photoluminescence (PL) emission both in solution and solid states. The double-layered devices fabricated using the 2 materials as the emitter show a sky-blue emission with a brightness and a current efficiency of 7,613 cd m^-2 and 1.11 cd A^-1 for TSF-Cz, and 1,507 cd m^-2 and 0.36 cd A^-1 for TSF-F, resp.

Macromolecular Rapid Communications published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C25H16O, SDS of cas: 159-62-6.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Sun, Ping published the artcileEvaluation of aromatic-derivatized cyclofructans 6 and 7 as HPLC chiral selectors, Name: 2,2′-Dimethoxy-1,1′-binaphthalene, the publication is Analyst (Cambridge, United Kingdom) (2011), 136(4), 787-800, database is CAplus and MEDLINE.

The two best aromatic-functionalized cyclofructan chiral stationary phases, R-naphthylethyl-carbamate cyclofructan 6 (RN-CF6) and dimethylphenyl-carbamate cyclofructan 7 (DMP-CF7), were synthesized and evaluated by injecting various classes of chiral analytes. They provided enantioselectivity toward a broad range of compounds, including chiral acids, amines, metal complexes, and neutral compounds It is interesting that they exhibited complementary selectivities and the combination of two columns provided enantiomeric separations for 43% of the test analytes. These extensive chromatog. results provided useful information about method development of specific analytes, and also gave some insight as to the enantioseparation mechanism.

Analyst (Cambridge, United Kingdom) published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C5H10N2OS, Name: 2,2′-Dimethoxy-1,1′-binaphthalene.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Vu, Choua published the artcileElaboration of 1,8-naphthyridine-2,7-dicarboxaldehyde into novel 2,7-dimethylimine derivatives, Name: 2,7-Dimethyl-1,8-naphthyridine, the publication is Journal of Heterocyclic Chemistry (2002), 39(4), 829-832, database is CAplus.

The condensation of 1,8-naphthyridine-2,7-dicarboxaldehyde, available by SeO₂ oxidation of 2,7-dimethyl-1,8-naphthyridine, with various primary amines RNH₂ (R = Me₃C, PhCH₂, EtSCH₂CH₂, cyclohexyl, 1-adamantyl) in MeOH afforded diimines I in reasonable to excellent yields (56-84%) after recrystallization Naphthyridines I typically displayed the NMR spectra consistent with a mirror plane perpendicular to the naphthyridine plane and syn,syn relationships of the naphthyridine moiety with each imine nitrogen lone pair.

Journal of Heterocyclic Chemistry published new progress about 14903-78-7. 14903-78-7 belongs to naphthyridine, auxiliary class 6.6_Aromatics,Naphthyridines, name is 2,7-Dimethyl-1,8-naphthyridine, and the molecular formula is C11H10O, Name: 2,7-Dimethyl-1,8-naphthyridine.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Goudappagouda published the artcileCascade energy transfer and tunable emission from nanosheet hybrids: locating acceptor molecules through chiral doping, Application of 9,10-Diethynylanthracene, the publication is Chemical Communications (Cambridge, United Kingdom) (2017), 53(52), 7072-7075, database is CAplus and MEDLINE.

Light harvesting donor-acceptor assemblies are indispensable to efficiently tap photons. In an attempt to improve the light harvesting efficiency of an acceptor doped assembly, the authors design and synthesize a donor-acceptor-donor triad which exhibits an exceptional intramol. energy transfer with excellent efficiency. Also, a facile cascade energy transfer (energy funneling) is observed in the presence of 2nd acceptors (63-91% efficiency) with tunable emission colors. Self-assembled nanosheets formed by the triad in the presence of acceptors exhibit cascade energy transfer assisted tunable emission. Use of chiral acceptors induces chirality to the triad and gave chiral nanosheets along with cascade energy transfer. Here chiral induction, nanosheet formation and cascade energy transfer in the presence of chiral acceptors are used as tools to probe the intercalation of acceptor mols. in the donor scaffold.

Chemical Communications (Cambridge, United Kingdom) published new progress about 18512-55-5. 18512-55-5 belongs to naphthyridine, auxiliary class Alkynyl,Anthracene, name is 9,10-Diethynylanthracene, and the molecular formula is C18H10, Application of 9,10-Diethynylanthracene.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Hellinghausen, Garrett published the artcileImproving peak capacities over 100 in less than 60 seconds: operating above normal peak capacity limits with signal processing, Application In Synthesis of 2960-93-2, the publication is Analytical and Bioanalytical Chemistry (2020), 412(8), 1925-1932, database is CAplus and MEDLINE.

A primary focus in liquid chromatog. anal. of complex samples is high peak capacity separations Using advanced instrumentation and optimal small, high-efficiency columns, complex multicomponent mixtures can now be analyzed in relatively short times. Despite these advances, chromatog. peak overlap is still observed Recently, attention has shifted from improvements in chromatog. efficiency and selectivity to enhancing data processing after collection. Curve fitting methods can be used to trace underlying peaks, but do not directly enhance chromatog. resolution Methods based on the properties of derivatives and power transform were recently shown to enhance chromatog. peak resolution while maintaining critical peak information (peak areas and retention times). These protocols have been extensively investigated for their fundamental properties, advantages, and limitations, but they have not been evaluated with complex chromatograms. Herein, we evaluate the use of deconvolution via Fourier transform (FT), even-derivative peak sharpening, and power law with the fast separation (< 60 s) of a 101-component mixture using ultra-high-pressure liquid chromatog. High noise and peak overlap are present in this gradient separation, which is representative of fast chromatog. Chromatog. resolution enhancement is demonstrated and described. Further, accurate quantitation is maintained and shown with representative examples. Enhancements in peak capacity and peak-to-peak resolutions are discussed. Finally, the statistical theory of overlap is used for 101 peaks and predictions are made for the number of singlet, doublet, and multiplets analyte peaks. The effect of increasing peak capacity by FT even derivative sharpening and power laws leads to a decrease in the number of peak overlaps and an increase in total peak number

Analytical and Bioanalytical Chemistry published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, Application In Synthesis of 2960-93-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Jones, Richard A. Y. published the artcileKinetics of quaternization of some naphthyridines and methylnaphthyridines, Related Products of naphthyridine, the publication is Chemical Communications (London) (1969), 56-7, database is CAplus.

The 2nd order rate constants for the reaction of MeI with some naphthyridines and methylnaphthridines in MeCN were determined by a conductimetric method. The following results were obtained at 24.8° (compound, and rate constant × 10-4 l./mole/sec. given): quinoline, 0.517; isoquinoline, 4.23; 1,5-naphthyridine, 0.232; 1,6-naphthyridine, 1.66; 1,8-naphthyridine, 4.25; 2-methyl-1,8-naphthyridine, 3.61; 3-methyl-1,8-naphthyridine, 5.74; 4-methyl-1,8-naphthyridine, 7.26; and 2,7-dimethyl-1,8-naphthyridine, 1.85. The rate constants are used to deduce the quaternization kinetics of the reactions.

Chemical Communications (London) published new progress about 14903-78-7. 14903-78-7 belongs to naphthyridine, auxiliary class 6.6_Aromatics,Naphthyridines, name is 2,7-Dimethyl-1,8-naphthyridine, and the molecular formula is C10H10N2, Related Products of naphthyridine.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem