Exploration of Photophysical and Nonlinear Properties of Salicylaldehyde-Based Functionalized Materials: A Facile Synthetic and DFT Approach

Inspired by a previous experimental study on the first-order hyperpolarizabilities of 1,3-thiazolium-5-thiolates mesoionic compounds using Hyper-Rayleigh scattering technique, we theoretically investigated the UV-Vis absorption spectra and every order polarizabilities of these mesoionic molecules. Based on the fact that the photophysical and nonlinear properties observed in the experiment can be perfectly replicated, our theoretical calculations explored the essential characteristics of the optical properties of the mesoionic compounds with different electron-donating groups at the level of electronic structures through various wave function analysis methods. The influence of the electron-donating ability of the donor on the optical properties of the molecules and the contribution of the mesoionic ring moiety to their optical nonlinearity are clarified, which have not been reported by any research so far. This work will help people understand the nature of optical properties of mesoionic-based molecules and provide guidance for the rational design of molecules with excellent photoelectric performance in the future.

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Nanodrugs as a new approach in therapy of cardiovascular diseases and cancer with tumor-associated angiogenesis

Current Medicinal Chemistry ◽

10.2174/0929867328666201231121704 ◽

2020 ◽

Vol 28 ◽

Author(s):

Justyna Hajtuch ◽

Karolina Niska ◽

Iwona Inkielewicz-Stepniak

Keyword(s):

Cardiovascular Disease ◽

Cardiovascular Diseases ◽

Controlled Drug Release ◽

Biological Properties ◽

Comprehensive Information ◽

Conventional Drug ◽

Key Factor ◽

Functionalized Materials

Background: Cancer along with cardiovascular diseases are globally defined as leading causes of death. Importantly, some risk factors are common to these diseases. The process of angiogenesis and platelets aggregation are observed in cancer development and progression. In recent years, studies have been conducted on nanodrugs in these diseases that have provided important information on the biological and physicochemical properties of nanoparticles. Their attractive features are that they are made of biocompatible, well-characterized and easily functionalized materials. Unlike conventional drug delivery, sustained and controlled drug release can be obtained by using nanomaterials. Methods: In this article, we review the latest research to provide comprehensive information on nanoparticle-based drugs for the treatment of cancer, cardiovascular disease associated with abnormal haemostasis, and the inhibition of tumorassociated angiogenesis. Results: The results of the analysis of data based on nanoparticles with drugs confirm their improved pharmaceutical and biological properties, which gives promising antiplatelet, anticoagulant and antiangiogenic effects. Moreover, the review included in vitro, in vivo research and presented nanodrugs with chemotherapeutics approved by Food and Drug Administration. Conclusion: By the optimization of nanoparticles size and surface properties, nanotechnology are able to deliver drugs with enhanced bioavailability in treatment of cardiovascular disease, cancer and inhibition of cancer-related angiogenesis. Thus, nanotechnology can improve the therapeutic efficacy of the drug, but there is a need for a better understanding of the nanodrugs interaction in the human body, because this is a key factor in the success of potential nanotherapeutics.

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Functionalized Materials as a Versatile Platform for Enzyme Immobilization in Wastewater Treatment

Current Pollution Reports ◽

10.1007/s40726-021-00193-5 ◽

2021 ◽

Author(s):

Agnieszka Kołodziejczak-Radzimska ◽

Long D. Nghiem ◽

Teofil Jesionowski

Keyword(s):

Wastewater Treatment ◽

Enzyme Immobilization ◽

Organic Dyes ◽

Scientific Progress ◽

Immobilized Enzymes ◽

Chemical Oxidation ◽

Biologically Active ◽

Water Pollutants ◽

Untreated Wastewater ◽

Functionalized Materials

Abstract Purpose of Review Untreated wastewater discharge can significantly and negatively impact the state of the environment. Rapid industrialization and economic development have directly contributed to land and water pollution resulting from the application of many chemicals such as organic dyes, pharmaceuticals, and industrial reagents. The removal of these chemicals before effluent discharge is crucial for environmental protection. This review aims to explore the importance of functionalized materials in the preparation of biocatalytic systems and consider their application in eliminating water pollutants. Recent Findings Wastewater treatment methods can be classified into three groups: (i) chemical (e.g., chemical oxidation and ozonation), (ii) physical (e.g., membrane separation and ion exchange), and (iii) biological processes. Biological treatment is the most widely used method due to its cost-effectiveness and eco-friendliness. In particular, the use of immobilized enzymes has recently become more attractive as a result of scientific progress in advanced material synthesis. The selection of an appropriate support plays an important role in the preparation of such biologically active systems. Recent studies have demonstrated the use of various materials for enzyme immobilization in the purification of water. Summary This review identifies and discusses different biocatalytic systems used in the enzymatic degradation of various water pollutants. Materials functionalized by specific groups can serve as good support matrices for enzyme immobilization, providing chemical and thermal stability to support catalytic reactions. Enzymatic biocatalysis converts the pollutants into simpler products, which are usually less toxic than their parents. Due to immobilization, the enzyme can be used over multiple cycles to reduce the cost of wastewater treatment. Future studies in this field should focus on developing new platforms for enzyme immobilization in order to improve degradation efficiency.

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Finite-difference equations of quasistatic motion of the shallow concrete shells in nonlinear setting

Curved and Layered Structures ◽

10.1515/cls-2020-0005 ◽

2020 ◽

Vol 7 (1) ◽

pp. 48-55 ◽

Cited By ~ 1

Author(s):

Bolat Duissenbekov ◽

Abduhalyk Tokmuratov ◽

Nurlan Zhangabay ◽

Zhenis Orazbayev ◽

Baisbay Yerimbetov ◽

...

Keyword(s):

Finite Difference ◽

Differential Equations ◽

Difference Equations ◽

Constant Load ◽

Time Interval ◽

Test Case ◽

Algebraic Equations ◽

Nonlinear Properties ◽

Finite Difference Equations ◽

Concrete Shells

AbstractThe study solves a system of finite difference equations for flexible shallow concrete shells while taking into account the nonlinear deformations. All stiffness properties of the shell are taken as variables, i.e., stiffness surface and through-thickness stiffness. Differential equations under consideration were evaluated in the form of algebraic equations with the finite element method. For a reinforced shell, a system of 98 equations on a 8×8 grid was established, which was next solved with the approximation method from the nonlinear plasticity theory. A test case involved computing a 1×1 shallow shell taking into account the nonlinear properties of concrete. With nonlinear equations for the concrete creep taken as constitutive, equations for the quasi-static shell motion under constant load were derived. The resultant equations were written in a differential form and the problem of solving these differential equations was then reduced to the solving of the Cauchy problem. The numerical solution to this problem allows describing the stress-strain state of the shell at each point of the shell grid within a specified time interval.

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Theoretical and experimental comparative study of nonlinear properties of imidazolium cation based ionic liquids

Journal of Molecular Liquids ◽

10.1016/j.molliq.2021.115391 ◽

2021 ◽

Vol 328 ◽

pp. 115391

Author(s):

Vinícius Castro Ferreira ◽

Letícia Zanchet ◽

Wesley Formentin Monteiro ◽

Letícia Guerreiro da Trindade ◽

Michèle Oberson de Souza ◽

...

Keyword(s):

Ionic Liquids ◽

Comparative Study ◽

Imidazolium Cation ◽

Nonlinear Properties

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Investigation on the Linear and Nonlinear Properties of Morin in Presence of Reverse Micelle and Different Oil Content in Reverse Micelle

Journal of Fluorescence ◽

10.1007/s10895-020-02665-1 ◽

2021 ◽

Author(s):

Abbas Rahdar ◽

Esmael Sanchooli ◽

R. Karimzadeh ◽

Dibakar Sahoo

Keyword(s):

Reverse Micelle ◽

Oil Content ◽

Nonlinear Properties ◽

Linear And Nonlinear

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Femtosecond Laser Fabrication of Hybrid Metal-Dielectric Structures with Nonlinear Photoluminescence

Photonics ◽

10.3390/photonics8040121 ◽

2021 ◽

Vol 8 (4) ◽

pp. 121

Author(s):

Ekaterina Ponkratova ◽

Eduard Ageev ◽

Filipp Komissarenko ◽

Sergei Koromyslov ◽

Dmitry Kudryashov ◽

...

Keyword(s):

Visible Spectral Region ◽

Single Step ◽

Hybrid Nanostructures ◽

Nonlinear Properties ◽

Nanophotonic Devices ◽

Sensing Applications ◽

Structure Morphology ◽

Wide Range ◽

Nonlinear Signal ◽

Dielectric Structures

Fabrication of hybrid micro- and nanostructures with a strong nonlinear response is challenging and represents a great interest due to a wide range of photonic applications. Usually, such structures are produced by quite complicated and time-consuming techniques. This work demonstrates laser-induced hybrid metal-dielectric structures with strong nonlinear properties obtained by a single-step fabrication process. We determine the influence of several incident femtosecond pulses on the Au/Si bi-layer film on produced structure morphology. The created hybrid systems represent isolated nanoparticles with a height of 250–500 nm exceeding the total thickness of the Au-Si bi-layer. It is shown that fabricated hybrid nanostructures demonstrate enhancement of the SHG signal (up to two orders of magnitude) compared to the initial planar sample and a broadband photoluminescence signal (more than 200 nm in width) in the visible spectral region. We establish the correlation between nonlinear signal and phase composition provided by Raman scattering measurements. Such laser-induced structures have significant potential in optical sensing applications and can be used as components for different nanophotonic devices.

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