Legislative Documents

Also, variously referred to as: House bills; House documents; House legislative documents; legislative documents; General Court documents

Tuning Light-Driven Motion and Bending in Macroscale-Flexible Molecular Crystals Based on a Cocrystal Approach

Flexible molecular crystals with stimuli-responsive properties are highly desirable; however, uncovering them is still a challenging goal. Herein, we report a cocrystal approach to obtain elastic molecular crystals that exhibit light-induced fluorescence changes and dynamic mechanical responses at the macroscale level. Cocrystals of naphthylvinylpyridine and tetrafluoroterephthalic acid were fabricated in different stoichiometry ratios (2:1 and 1:1), which present different shapes [two-dimensional (2D) and one-dimensional (1D) morphologies], photoemission, and mechanical properties (rigidity and flexibility). Moreover, obviously different photomechanical energy conversions (light-driven cracking/popping and bending/motion) occur for the 2D and 1D cocrystals, respectively. Nuclear magnetic resonance (NMR) spectra show the occurrence of photoinduced [2 + 2] cycloaddition in both cocrystals, which is the primary mechanism for their photoactuating behaviors. Crystal structure analysis and theoretical calculation further reveal that protonation and the hydrogen-bonding network play important roles in light-stimulus-bendable 1D cocrystal. Thus, the transformation from rigidity to flexibility based on cocrystallization with different stoichiometry may offer an effective means to tune the dynamic light-driven responses for smart crystalline materials

Tuning Light-Driven Motion and Bending in Macroscale-Flexible Molecular Crystals Based on a Cocrystal Approach

Flexible molecular crystals with stimuli-responsive properties are highly desirable; however, uncovering them is still a challenging goal. Herein, we report a cocrystal approach to obtain elastic molecular crystals that exhibit light-induced fluorescence changes and dynamic mechanical responses at the macroscale level. Cocrystals of naphthylvinylpyridine and tetrafluoroterephthalic acid were fabricated in different stoichiometry ratios (2:1 and 1:1), which present different shapes [two-dimensional (2D) and one-dimensional (1D) morphologies], photoemission, and mechanical properties (rigidity and flexibility). Moreover, obviously different photomechanical energy conversions (light-driven cracking/popping and bending/motion) occur for the 2D and 1D cocrystals, respectively. Nuclear magnetic resonance (NMR) spectra show the occurrence of photoinduced [2 + 2] cycloaddition in both cocrystals, which is the primary mechanism for their photoactuating behaviors. Crystal structure analysis and theoretical calculation further reveal that protonation and the hydrogen-bonding network play important roles in light-stimulus-bendable 1D cocrystal. Thus, the transformation from rigidity to flexibility based on cocrystallization with different stoichiometry may offer an effective means to tune the dynamic light-driven responses for smart crystalline materials

Ultra-deep Desulfurization of Gasoline with CuW/TiO₂–GO through Photocatalytic Oxidation

Graphene oxide (GO) was co-modified with copper, tungsten, and titanium oxide. A photocatalytic reactor was used to investigate the performance of the resulting catalysts in the ultra-deep desulfurization of fluid catalytic cracking (FCC) gasoline. The resultant samples were characterized using the X-ray diffraction (XRD), scanning electron microscopy, X-ray photoelectron spectroscopy, and nitrogen adsorption–desorption techniques. XRD analysis indicated the coexistence of TiO₂, CuO, and WO₃ in the catalysts. The desulfurization rate, the refined oil yield, and the increase in the research octane number of FCC gasoline reached 100%, 99.4%, and 1.6 units, respectively, under suitable conditions of a metal content of 10.3%, a metal ratio of 0.7, a reaction temperature of 313 K, a reaction time of 1 h, a catalyst/gasoline ratio of 0.25, and an oxidant percent of 0.5%. The catalyst was active in the desulfurization reaction under ultraviolet irradiation and reused 3 times with no loss in activity

Tai Chi versus Non-intervention: Cardio Output.

<p>Tai Chi versus Non-intervention: Cardio Output.</p

Tai Chi versus Non-intervention: Stair Test Index.

<p>Tai Chi versus Non-intervention: Stair Test Index.</p

Tai Chi versus Non-intervention: The Forced Vital Capacity in The First Second.

<p>Tai Chi versus Non-intervention: The Forced Vital Capacity in The First Second.</p

Tai Chi versus Non-intervention: Forced Vital Capacity.

<p>Tai Chi versus Non-intervention: Forced Vital Capacity.</p

Details of literature search and selection.

<p>Abbreviations: SCI: Science Citation Index; VIP: Chinese Sci sientific Journal Database; CNKI: China National Knowledge Information database.</p

Tai Chi versus Non-intervention: Left Ventricular Effective Pump Power.

<p>Tai Chi versus Non-intervention: Left Ventricular Effective Pump Power.</p