We utilize straightforward and traditional Sonogashira coupling reactions to synthesize two conjugated microporous polymers linked with pyrene (referred to as PyT-PTCDA and PyT-PHTD CMPs) by combining the common precursor of 1,3,6,8-tetraethynylpyrene (PyT) with 1,7-dibromo-3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA-Br2) and 3,6-dibromophenanthrene-9,10-dione (PHTD-Br2). Various analytical techniques, including spectroscopy and microscopy, are employed to characterize these two PyT-CMP materials. The PyT-PTCDA CMP exhibits notable thermal stability (with a decomposition temperature of 351 ◦C and a char yield of 61 wt %). We combine the PyT-PTCDA and PyT-PHTD CMPs with exceptionally conducting single-walled carbon nanotubes (SWCNTs) through π-π stacking interactions between SWCNTs and PyT unit to improve their electrical conductivity and electrochemical performance. Electrochemical evaluations reveal that the PyT-PTCDA CMP/SWCNTs nanocomposite shows an impressive capacitance of 376 F g- 1 (at 0.5 A g- 1) in a three-electrode system. After undergoing 5000 cycles of charging and discharging, it maintained 98 % of its original capacitance while demonstrating an energy density of 52 Wh/kg. Additionally, in a symmetric coin cell system, the energy density is 17 Wh/kg and the capacitance is 119 F g- 1 for PyT-PTCDA CMP/SWCNTs. This approach presents a promising avenue for developing high-performance supercapacitors by strategically blending PyT-CMPs with highly conductive SWCNTs.
For the first time, covalently anchoring size selected silver nanoclusters [Ag44(MNBA)30] on the Bi2S3@UiO-66-NH2 and MoS2@UiO-66-NH2 heterojunctions were constructed as novel photocatalysts for photodegradation of methylene blue (MB) dye. The anchoring of Ag44 on MoS2@UiO-66-NH2 and Bi2S3@UiO-66-NH2 heterojunctions extended the light absorption of UiO-66-NH2 to the visible region and improved the transfer and separation of photogenerated charge carriers through the heterojunctions with a unique band gap structure. The UV–Vis-NIR diffuse reflectance spectroscopic analysis confirmed that the optical absorption properties of the UiO-66-NH2 were shifted from the UV region at 379 nm to the visible region at ~ 705 nm after its doping with Bi2S3 nanorods and Ag44 nanoclusters (Bi2S3@UiO-66-NH-S-Ag44). The prepared Bi2S3@UiO-66-NH-S-Ag44 and MoS2@UiO-66-NH-S-Ag44 …
The missing-linker defects of UiO-66 were exploited to covalently anchor Cu nanoclusters (Cu/UiO-66). The molecular interactions between the metals and oxides as copper-zirconia interfaces in Cu/UiO-66 are essential for heterogeneous catalysis, leading to remarkable synergistic impacts on activity and selectivity. Homogeneously distributed carbonaceous mixed metal oxides (CuO/ZrO2@C) nanocomposite was prepared via carbonization of the Cu/UiO-66 at 600 °C for 3 h in air. To enhance the acidity properties of the CuO/ZrO2@C nanocomposite, a small amount of sulfuric acid was added and heated at 150 °C under an N2 atmosphere (CuO/ZrO2-SO3H@C). The synthesised Cu/UiO-66 and CuO/ZrO2-SO3H@C catalysts were used as novel catalysts in the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). The Cu/UiO-66 and CuO/ZrO2-SO3H@C catalysts displayed complete conversion of the 4-NP …
In this paper, we explore distribution dynamics of two-qubit Fisher and skew information
correlations of a dissipative microwave cavity ¯eld interacting with two charged superconducting
qubits. Besides the negativity function, non-classical correlations beyond entanglement
are studied using local quantum Fisher information (LQFI) and local quantum
uncertainty (LQU). We ¯nd that the two-qubit non-classical correlations are sensitive to
qubit{qubit distribution angle, two-qubit dissipation parameter, and initial coherent state intensity.
The phenomena of frozen quantum correlations, sudden death or birth, as well as
revival dynamical maps are feasible in the current two-qubit state when exposed to a microwave
cavity. The non-classical correlations and entanglement have been found damped under the
two-qubit dissipation appearance in the ¯eld. For the increasing strength of coherence intensity
of the ¯eld, the two-qubit non-classical correlations functions remain to emerge quickly and
oscillate with higher frequency, although with the least amplitudes. Interestingly, unlike the
non-classical correlations, negativity does not emerge against higher coherence strengths of the
cavity and remains completely zero. Finally, for the least dissipation and higher coherence
strength, one can readily generate non-classical two-qubit states employing a microwave cavity.
This paper solves milburn’s intrinsic noise (IN) model for a 3-level atom of anΞ-type interacting with
a coherent cavity field via multiphoton transitions. Therefore, the effects of the intrinsic noise and the
multi-photon interactions are investigated for some quantum phenomena, such as total correlation,
entanglement, and atomic inversion. In general, we found that the collapse-revival phenomenon
occurs during the oscillatory behaviour of atomic population dynamics. In addition, the birth-death
phenomenon is observed in the negativity dynamics. Entropy, negativity, and mutual information
have various dynamics. It is found that, as the entropy increases, the negativity and mutual
information diminish to stationary levels. When intrinsic noise is considered, all the phenomena of
atomic inversion, entropies, negativity and mutual information exhibit high sensitivity to high
intrinsic noise values, except the mutual information dynamics, which is more resistant than that of
the other quantifiers.
Bell’s inequalities are described by the sums of correlations including non-commuting observables in each of two systems.
Bell’s inequalities violation is possible since the accuracy of any joint measurement of mentioned observables would be
limited by quantum uncertainty relations. In this work, we investigate the generating and robustness of two-qubit information
resources including two-qubit Bell nonlocality, quantum entanglement, and entropic measurement uncertainty in a two
neighboring spin-1/2 particles coupled via the Heisenberg XYZ interaction subjected to a transverse uniform magnetic field
by applying Dzyaloshinskii–Moriya (DM) and Kaplan–Shekhtman–Entin–Wohlman–Aharony (KSEA) interactions under
intrinsic decoherence. The influence of DM–KSEA interactions, external magnetic field, and intrinsic decoherence on the
dynamics of quantum correlations in our mentioned model is analyzed. Interestingly, new dynamical features of Bell nonlocality,
entanglement, and entropic uncertainty are obtained by regulating the initial state, system parameters, and decoherence.
Therefore, our results provide a helpful understanding of such dynamics and might offer an insight into measurement
estimating in open quantum systems.
An analytical description for the dynamical evolution of a qubit interacting with
two nonlinear Kerr oscillators pumped by optical parametric process is derived through
Su(1, 1)-algebraic treatment. The role of intrinsic damping, detuning and Kerr-like Medium
on the squeezing phenomenon is elucidated via information entropy squeezing. The evolutions
of the interaction of the qubit with two-mode Kerr nonlinear coupler lead to the
appearance the regular squeezing phenomenon during the chosen time-interval. The preserving
and protecting of the qubit components from the squeezing can be controlled by the
intrinsic decoherence, detuning and the Kerr-like medium effects. Where the squeezing phenomenon
deteriorates with increasing the decoherence rate, whereas, the Kerr-like medium
can not protect some qubit components from the squeezing.
An analytical solution of the master equation that describes two charge superconducting
qubits interacts with a single microwave cavity field mode within dispersive
approximation and dissipation region of the qubit damping. Quantum correlations of
a general two-qubit state (non-X-state) are studied by using three different quantum
correlation quantifiers: measurement-induced non-locality, geometric quantum discord
and logarithmic negativity. It is shown that the quantum correlations are sensitive
to the choice of the parameters of the qubit dissipation rate, coherent state intensity
and the initial qubit distribution angle. The generated oscillatory behavior of quantum
correlations is different and more prominent as the noise rate decreases at the
considered period of time.