Abstract Efficient emission of purely organic room‐temperature phosphorescence (RTP) is great significant for potential application in optoelectronics and photobiology. Herein, we report an uncommon phosphorescent effect single molecule enhanced by resulting supramolecular assembly host–guest complexation. The chromophore bromophenyl‐methyl‐pyridinium (PY) with different counterions as guests display various quantum yields from 0.4 % to 24.1 %. Single crystal X‐ray diffraction results...

A photoresponsive supramolecular assembly was constructed and presented multi-color fluorescence emissions in several environments including solution, PVA living cells.

Natural gas hydrate (NGH) concentrations hold large reserves of relatively pure unconventional natural gases, consisting mainly methane. Depressurization is emerging as the optimum conversion technology for converting NGH in its reservoir to constituent water and gas. commonly have a pore fill over 80%, which means that low-permeability reservoir, has displaced terms porosity. Fracturing (fracking) employed increasing permeability-dependent production, been proven conventional tight oil...

Near-infrared (NIR) targeted cell imaging has become a research hotspot due to the advantages of deeper tissue penetration, minimal interference from background signals, and lower light damage. Herein, we report multivalent supramolecular aggregate with NIR fluorescence emission, which was fabricated triphenylamine derivatives (TPAs), cucurbit[8]uril (CB[8]), Si-rhodamine (SiR), hyaluronic acid (HA). Interestingly, possessing rigid luminescent core cationic phenylpyridinium units linked by...

With the circulating fluidized bed (CFB) as reactor, an integrated facility was developed for fast pyrolysis of biomass. The main chemical processes in CFB can be modeled, and is divided into two zones corresponding to secondary reactions. wood powder processed varying temperature, particle size powder, feeder position. Based on variation gas composition bio-oil ingredients, analysis experimental data highlights important effects heating rate, residence time. trend that (1) higher...

Multivalent supramolecular assemblies have recently attracted extensive attention in the applications of soft materials and cell imaging. Here, we report a novel multivalent assembly constructed from 4-(4-bromophenyl)pyridine-1-ium bromide modified hyaluronic acid (HABr), cucurbit[8]uril (CB[8]) laponite® clay (LP), which could emit purely organic room-temperature phosphorescence (RTP) with lifetime up to 4.79 ms aqueous solution via interactions. By doping dyes rhodamine B (RhB) or...

A photo/chemo dually interconvertible system was constructed through the supramolecular assembly of azobenzene-diphenylalanine (Azo-FF) with α-cyclodextrin. The resultant chiral nanohelix able to interconvert into a nanosquare upon irradiation at different wavelengths, but nanofiber changing solvent polarity, which provides feasible way achieve highly ordered nanostructures various morphologies, dimensions and chiralities.

A series of bridged beta-cyclodextrin (beta-CyD) dimers possessing functional tethers various lengths was synthesized in moderate yield by the treatment 2,2'-biquinoline- 4,4'-dicarboxylic dichloride with beta-CyD or mono[6-oligo(ethylenediamino)-6-deoxy]-beta-CyDs. The products were 2,2'-biquinoline-4,4'-dicarboxy-bridged bis(6-O-beta-CyD) (8), N,N'-bis(2-aminoethyl)-2,2'-biquinoline-4,4'-dicarboxamide-bridged bis(6-amino-6-deoxy-beta-CyD) (9), and...

Volcanic hydrocarbon reservoirs are rare and may be overlooked. The Carboniferous volcanic rocks of the Kebai fault zone in western Junggar Basin contain (HC) rock with proven oil reserves 9.76 × 108 bbl that have a complex filling history. We investigated lithology properties these HC as well diagenesis control faults fractures reservoirs. is primarily andesite tuff. Also present were breccia metamorphic addition to rhyolite, felsite, diabase, granite lava. On basis microscopic examination,...

Newly synthesized bis(β-cyclodextrin-6-yl) 2,2'-bipyridine-4,4'-dicarboxylate was found to induce an unusual fluorescence enhancement of Rhodamine B (RhB) upon complexation. This effect is attributable the equilibium shift RhB highly fluorescent carboxylate ion form, which induced by cooperative binding two appropriately preorganized cyclodextrin units in bis(β-cyclodextrin). sandwich complexation behavior investigated means and 2D NMR spectroscopy.

To further reveal the factors governing supramolecular assembly of beta-cyclodextrin (beta-CD) inclusion complexes, two aggregates (1 and 2) were prepared from complexes beta-CD with 4-hydroxyazobenzene 4-aminoazobenzene, respectively, their binding behavior investigated by means X-ray analysis, UV-vis, NMR, circular dichroism spectra in both solution solid state. The obtained results indicated that beta-CD/4-hydroxyazobenzene complex 1 could form head-to-head dimers (triclinic system, space...

Herein, a type of light- and heat-driven flexible supramolecular polymer with reversibly long-lived phosphorescence photochromism is constructed from acrylamide copolymers 4-phenylpyridinium derivatives containing cyano group (P-CN, P-oM, P-mM), sulfobutylether-β-cyclodextrin (SBCD), polyvinyl alcohol (PVA). Compared to their parent solid polymers, these supramolecules based on the non-covalent cross-linking copolymers, SBCD, PVA efficiently boost lifetimes (723.0 ms for P-CN, 623.0 945.8...

Multicharged cyclodextrins have attracted significant attention because of their applications in biology and pharmaceuticals. This study reports an aminoethoxy-phenyl-pyridinium-modified γ-cyclodextrin (PyA-γ-CD) as a highly efficient coagulant for heparin through multivalent interactions. The UV titration experiment is performed to obtain apparent binding constants (K

A temporary venting device for shale gas pipeline station is designed. After one year of adhibition, there are pits in the elbow pipe, which presumed to be caused by erosion untreated collector. The model simplified. sand set as discrete phase, and liquid continuous phase. Based on VOF DPM phase multiphase flow, rate U-shaped pipe studied ANSYS Fluent. internal flow field studied. influence solid particle velocity, mass diameter, curvature-to-diameter diameter using control variable method....