Study of H-bonded assemblies of the solvates of anthracene derivatives: guest effect on the crystal symmetry and spectroscopic properties

<p>Two solvates of title compound 1-acetyl-3-naphthyl-5-(9-anthryl)-2-pyrazoline solvate(ANNP) (<b>1a</b>) with chloroform (<b>1b</b>) and acetic acid (<b>1c</b>) and a single crystal of another title compound 1-acetyl-3-(4-chloro)phenyl-5-(9-anthryl)-2-pyrazoline (ACAP) (<b>2a</b>) and its adduct with phenol (<b>2b</b>) were afforded via solution growth technique. The structure of these solids were confirmed and verified by multiple techniques such as single crystal X-ray diffraction (SCXRD) analysis, PXRD, DSC/TGA and Infrared spectroscopy. Structural analysis indicates that guest inclusion results not only in stronger hydrogen bonds, but also in a larger number of favourable C–H⋯π interactions between ANNP/ACAP molecules. The solvates show symmetry reduction guest effect comparing with the guest free molecules of ANNP and ACAP. Moreover, characteristic changes have been observed in the Infrared bands of the solvates owing to the formation of hydrogen bonds between host–guest.</p> <p>The three designed inclusion complexes (<b>1b</b>, <b>1c</b>, <b>2b</b>) crystallizes*** in 1:1 stoichiometric ratio with different small molecules of guests characterised by diffraction analysis. Hydrogen bonding plays a key part in binding guest molecules to the respective host compound and appear to influence the self-assembly of host–guest complex.</p

Thermophysical properties of base fluid (water) and nanoparticles (iron oxide and alumina oxide).

<p>Thermophysical properties of base fluid (water) and nanoparticles (iron oxide and alumina oxide).</p

Comparison of ferrofluid (<i>Fe</i>₃<i>O</i>₄) velocity with nanofluid (<i>Al</i>₂<i>O</i>₃) velocity when <i>Gr</i> = 0.1, <i>φ</i> = 0.04, Re = 1, <i>Pe</i> = 1, <i>M</i> = 1, <i>λ</i> = 1, <i>τ</i> = 5 and <i>ω</i> = 0.2.

<p>Comparison of ferrofluid (<i>Fe</i>₃<i>O</i>₄) velocity with nanofluid (<i>Al</i>₂<i>O</i>₃) velocity when <i>Gr</i> = 0.1, <i>φ</i> = 0.04, Re = 1, <i>Pe</i> = 1, <i>M</i> = 1, <i>λ</i> = 1, <i>τ</i> = 5 and <i>ω</i> = 0.2.</p

Comparison of ferrofluid (<i>Fe</i>₃<i>O</i>₄) temperature with nanofluid (<i>Al</i>₂<i>O</i>₃) temperature when <i>φ</i> = 0.04, <i>N</i> = 1.5 and <i>τ</i> = 0.5.

<p>Comparison of ferrofluid (<i>Fe</i>₃<i>O</i>₄) temperature with nanofluid (<i>Al</i>₂<i>O</i>₃) temperature when <i>φ</i> = 0.04, <i>N</i> = 1.5 and <i>τ</i> = 0.5.</p

Temperature graph for <i>φ</i> when <i>N</i> = 1.5 and <i>τ</i> = 0.5.

<p>Temperature graph for <i>φ</i> when <i>N</i> = 1.5 and <i>τ</i> = 0.5.</p

Comparison of present velocity results <i>φ</i> = 0 with published results of [30].

<p>Comparison of present velocity results <i>φ</i> = 0 with published results of [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0141213#pone.0141213.ref030" target="_blank">30</a>].</p

Concentration profiles for and different values of .

<p>Concentration profiles for and different values of .</p

Significance of Cu-Fe₃O₄ on fractional Maxwell fluid flow over a cone with Newtonian heating

The goal of this research is to investigate fractional Maxwell hybrid nanofluids utilizing partial differential equations in terms of Caputo time fractional derivatives. Specifically, the effect of Newtonian heating on the thermal performance of a fractional Maxwell hybrid nanofluid moving over a permeable cone in the presence of thermal radiation and heat generation is considered. The Crank–Nicolson method and L1 algorithmt of Caputo derivative are used to find numerical solutions to the considered nonlinear problem. The effects of significant flow factors on fluid properties are examined and illustrated in various graphs. According to the results, the thermal performance of the fluid raised by 0.4%, 6.1%, and 3.1% on adding 4% volume fraction of Fe3O4, Cu, and Cu−Fe3O4, respectively, in the base fluid.</p

Lantern-shaped cobalt(II) and nickel(II) complexes based on a tripodal bis(pyrazol-1-<i>yl</i>)acetate ligand: crystal structure, magnetic property and Hirshfeld surface analysis

Two novel Co(II) and Ni(II) complexes Co(dpza)2 (1) and Ni(dpza)2 (2) (Hdpza is 2,2-di(1H-pyrazol-1-yl)acetic acid) were successfully synthesized via solvothermal method. The two complexes namely, 1 and 2 are isostructural exhibiting lantern-shaped configurations as illustrated by the structural analysis. The structures of the two complexes have been determined by single-crystal X-ray diffraction, FT-IR, and TGA. Magnetic property of 1 in the 2–300 K also has been investigated which displays dominant ferromagnetic behavior. Hirshfeld surface analysis reveals that the main interactions for complex two are O···H/H···O and H···H contacts.</p

Velocity profiles for different values of constant shear stress .

<p>Velocity profiles for different values of constant shear stress .</p