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Topic Review
Synthesis of the Coumarin Core
Coumarin compounds are attractive organic compounds with many practical applications. Among them there are compounds with biological activity, pharmaceuticals, agrochemicals, dyes, and optoelectronic materials. For this reason, enormous and continuous attempts were made to develop new synthetic pathways and protocols to facilitate the key cyclization reaction of heterocyclic ring and its regioselective functionalization. Of the numerous proposed reactions for the preparation of coumarins, those based on transition metal catalysts have been frequently used recently. Such processes as intramolecular and intermolecular hydroarylation of alkenes or alkynes can be mentioned among the most effective reactions proceeding via the activation of the C–H bond. Knowledge about the mechanistic foundations of catalytic processes seems to be of significant importance in order to improve them and simplify the conditions. Direct functionalization of the coumarin skeleton seems to be one of the more difficult tasks in recent times.
  • 1.1K
  • 23 Mar 2022
Topic Review
Textile Fabric Coatings for UV Protection
The rapid progress in the use of textile fabric materials in various industrial and domestic applications requires the inclusion of smart functions to achieve comfortable and safety properties to the end users. Advances in the development of coatings for sustainable textile fabrics for UV protection are presented here.
  • 1.1K
  • 10 Nov 2022
Topic Review
CL-20-Based Cocrystal Energetic Materials
Energetic materials (EMs) are widely used in military and civilian applications, such as weaponry, aerospace explorations and fireworks. However, both the power and safety of energetic materials are the most concern in the field of energetic materials application, but there is an essential contradiction between them: the highly energetic materials are often not safe, and, at present, the rareness of pure low-sensitive and highly energetic explosive has been found.  Due to the stringent requirements for both low-sensitivity and high-power simultaneously, the cocrystallization of explosive has attracted great interest since it can alleviate, to a certain extent, the power-safety contradiction. The new energetic cocrystals can potentially exhibit decreased sensitivity, higher performance through increased packing efficiency or oxygen balance, or improve aging due to altered bonds to specific groups on constituent molecules.
  • 1.1K
  • 21 Oct 2020
Topic Review
2,7(3,6)-Diaryl(arylamino)-substituted Carbazoles
The carbazole is an electron-rich heterocyclic compound, whose structure can be easily modified by rather simple reactions in order to obtain 2,7(3,6)-diaryl(arylamino)-substituted carbazoles. The substituted derivatives are widely used for the formation of Organic light emitting diode (OLED) due to their good charge carrier injection and transfer characteristics, electroluminescence, thermally activated delayed fluorescence, improved thermal and morphological stability as well as their thin film forming characteristics. 
  • 1.1K
  • 24 Nov 2021
Topic Review
Switchable Solvents
Switchable solvents are a special class of solvents that have the ability to switch between different forms and properties, depending on external stimuli. The most common type of switchable solvents are called "ionic liquids" which are liquids made up of ions that are in a liquid state at room temperature. These solvents have unique properties that make them attractive for a wide range of applications, such as green chemistry, separation and purification processes, and energy storage. Switchable solvents are a class of solvents that can undergo reversible changes in their physical and chemical properties in response to external stimuli, such as temperature, pressure, or pH. They have gained significant attention in recent years due to their potential as more sustainable and efficient alternatives to traditional solvents in a range of applications, including industrial processes and chemical synthesis. Switchable solvents can be classified into two main categories: reversible ionic liquids (RILs) and switchable polarity solvents (SPSs). RILs are a type of switchable solvent that can change from a liquid to a solid or a gas, depending on the applied stimulus. This reversible phase transition is due to the formation or disruption of ionic interactions between the solvent molecules. RILs have been used in a range of applications, including the separation of chemicals, catalysis, and energy storage. SPSs, on the other hand, are solvents that can switch between polar and non-polar states in response to a stimulus, such as a change in pH or temperature. This switch in polarity can be used to selectively extract or dissolve different types of molecules, making them useful in a range of industrial processes, including extraction, separation, and purification. One of the main advantages of switchable solvents is their potential to reduce the environmental impact of chemical processes by replacing traditional solvents that are toxic or have a high carbon footprint. They can also improve process efficiency by reducing the need for multiple solvents and simplifying the solvent recovery process
  • 1.1K
  • 24 Mar 2023
Topic Review
Covalent Inhibitors for Neglected Diseases
Neglected Tropical Diseases (NTD) is a group of 20 diseases affecting more than 1 billion people in the world, especially those living in poor communities of tropical areas. Caused by a variety of etiologic agents such as viruses, bacteria, and parasites, these diseases have a great impact on public health, with social and economic consequences to the affected populations.
  • 1.1K
  • 24 Jul 2023
Topic Review
Ti-Based Catalysts on Magnesium Hydride
Magnesium-based hydrides are considered as promising candidates for solid-state hydrogen storage and thermal energy storage, due to their high hydrogen capacity, reversibility, and elemental abundance of Mg. To improve the sluggish kinetics of MgH2, catalytic doping using Ti-based catalysts is regarded as an effective approach to enhance Mg-based materials.
  • 1.1K
  • 31 May 2021
Topic Review
Tire-Derived Rubber Recycle
Rubber, as elastomer, is difficult to recycle. Today, the main end of life routes of tyres and other rubber products are landfilling, incineration in e.g. cement plants, and grinding to a fine powder, with huge quantities lacking sustainable recycling of this valuable material. Devulcanization, i.e. the breaking up of sulfur bonds by chemical, thermo-physical or biological means, is a promising route that has been investigated for more than 50 years. This review article presents and update on the state-of-the art in rubber devulcanization. This review article addresses established devulcanization technologies and novel processes described in the scientific and patent literatures. It is expected that the public discussion of environmental impacts of thermoplastics will soon spill over to thermosets and elastomers. Therefore, the industry needs to develop and market solutions proactively. Tyre recycling through devulcanization has a huge lever, since approx. 40 million tons of tyres are discarded annually.
  • 1.1K
  • 27 Oct 2020
Topic Review
Coatings Empowering Antiviral/Viricidal Properties
In the surge of the current, alarming scenario of SARS-CoV-2 infections, there is a immediate necessity for developing highly-innovative antiviral agents to work against the viruses with a broad spectrum of antiviral activity. Here-in, science-based methods, mechanisms, and procedures are implemented in obtaining resultant antiviral coated substrates, used in the destruction of the strains of the different viruses are presented. we pay particular attention to recent examples from the materials science and engineering field that highlight how some classes of antiviral drug candidates, such as polymeric materials, metal ions/metal oxides and functional nanomaterials result in acting against the viral spread. Based on the available literature and data, we also disclose some of the strategies for development of a universal and reusable virus deactivation system against the emerging COVID-19.
  • 1.1K
  • 25 Sep 2020
Topic Review
Iguvine Tablets
The Iguvine Tablets, also known as the Eugubian Tablets or Eugubine Tables, are a series of seven bronze tablets from ancient Iguvium (modern Gubbio), Italy, written in the ancient Italic language Umbrian. The earliest tablets, written in the native Umbrian alphabet, were probably produced in the 3rd century BC, and the latest, written in the Latin alphabet, from the 1st century BC. The tablets contain religious inscriptions that memorialize the acts and rites of the Atiedian Brethren, a group of 12 priests of Jupiter with important municipal functions at Iguvium. The religious structure present in the tablets resembles that of the early stage of Roman religion, reflecting the Roman archaic triad and the group of gods more strictly related to Jupiter. Discovered in a farmer's field near Scheggia in the year 1444, they are currently housed in the Civic Museum of the Palazzo dei Consoli in Gubbio. The tablets are by far the longest and most important document of any of the Osco-Umbrian group of languages, which are closely related to Latin. The tablets shed light on the grammar of this ancient dead language, and also on the religious practices of the ancient peoples of Italy, including the archaic religion of the Romans. Parts of tablets VI and VII appear to be written in an accentual metre, similar to the Saturnian metre that is encountered in the earliest Latin poetry. The complete text, together with a translation into Latin, was published in London in 1863 by Francis Newman and 1931 in a book by Albrecht von Blumenthal. They were translated into English and published by James W. Poultney in 1959. Although the general meaning of the tablets is clear, there are still many obscure and debated points and issues. The main difficulty in understanding the text is the insufficient knowledge of the Umbrian vocabulary. These are the only documents of full details of sacred rituals from the ancient religions of Europe which have come down to us in an almost complete state. Moreover, their content deals with the rituals (sacrifices and prayers) addressed to the highest gods of the local community and to some extent may reflect the common religious beliefs and practices of the Italic peoples. Consequently, a great number of scholars have devoted their efforts to reading and deciphering them since their discovery. The modern Festival of Ceri, celebrated every year in Gubbio on May 15 in honor of Bishop Ubald or Ubaldo of Gubbio (1084–1160), shares certain features with the rites described in the text and so may be a survival of that ancient pre-Christian custom. It is also celebrated in Jessup, Pennsylvania, a town with a large number of immigrants from the Gubbio area, as Saint Ubaldo Day.
  • 1.1K
  • 27 Oct 2022
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