scholarly journals Tetrapyrrolic Macrocycles: Synthesis, Functionalization and Applications 2018

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 433 ◽  
Author(s):  
Nuno M. M. Moura ◽  
Maria Amparo F. Faustino ◽  
Maria Graça P. M. S. Neves
Keyword(s):  
Materials Science ◽  
Structural Features ◽  
Special Issue ◽  
Biomimetic Models ◽  
Synthetic Methodologies ◽  
Natural And Synthetic

Natural and synthetic macrocycles like porphyrins, corroles and phthalocyanines are considered strong candidates to be used in different fields, such as catalysis, sensing, medicine, materials science, or in the development of advanced biomimetic models. All these applications are strongly dependent on the availability of compounds with adequate and specific structural features. This Special Issue has collected 13 contributions which consolidate and expand our knowledge on the application of these macrocycles in different fields accompanied by innovative synthetic methodologies to afford and to functionalize this type of compounds.

scholarly journals Editorial for Special Issue “Historical Mineral Pigments”

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 237
Author(s):  
Carolina Cardell ◽  
Jose Santiago Pozo-Antonio
Keyword(s):  
Chemical Characterization ◽  
Glass Enamel ◽  
Special Issue ◽  
High Quality ◽  
Physical Chemical ◽  
Scientific Disciplines ◽  
Natural And Synthetic

The physical–chemical characterization of natural and synthetic historical inorganic and mineral pigments, which may be found embedded in paintings (real or mock-ups), glass, enamel, ceramics, beads, tesserae, etc., as well as their alteration under different decay scenarios, is a demanding line of investigation. This field of research is now both well established and dynamic, as revealed by the numerous publications in high-quality journals of varied scientific disciplines. [...]

Zeolates: A Coordination Chemistry View of Metal-Ligand Bonding in Intrazeolite MOCVD Type Precursors and Semiconductor Nanoclusters

1992 ◽  
Vol 277 ◽  
Author(s):  
Geoffrey A. Ozin ◽  
Carol L. Bowes ◽  
Mark R. Steele
Keyword(s):  
Self Assembly ◽  
Materials Science ◽  
Zeolite Y ◽  
Chemical Vapour ◽  
Internal Surface ◽  
Building Blocks ◽  
Structural Features ◽  
Organic Chemical ◽  
Wide Range ◽  
Shape Selective

ABSTRACTVarious MOCVD (metal-organic chemical vapour deposition) type precursors and their self-assembled semiconductor nanocluster products [1] have been investigated in zeolite Y hosts. From analysis of in situ observations (FTIR, UV-vis reflectance, Mössbauer, MAS-NMR) of the reaction sequences and structural features of the precursors and products (EXAFS and Rietveld refinement of powder XRD data) the zeolite is viewed as providing a macrospheroidal, multidendate coordination environment towards encapsulated guests. By thinking about the α- and β-cages of the zeolite Y host effectively as a zeolate ligand composed of interconnected aluminosilicate “crown ether-like” building blocks, the materials chemist is able to better understand and exploit the reactivity and coordination properties of the zeolite internal surface for the anchoring and self-assembly of a wide range of encapsulated guests. This approach helps with the design of synthetic strategies for creating novel guest-host inclusion compounds having possible applications in areas of materials science such as nonlinear optics, quantum electronics, and size/shape selective catalysis.

scholarly journals Synthesis, Antiprotozoal Activity, and Cheminformatic Analysis of 2-Phenyl-2H-Indazole Derivatives

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2145
Author(s):  
Karen Rodríguez-Villar ◽  
Lilián Yépez-Mulia ◽  
Miguel Cortés-Gines ◽  
Jacobo David Aguilera-Perdomo ◽  
Edgar A. Quintana-Salazar ◽  
...  
Keyword(s):  
Phenyl Ring ◽  
Medicinal Chemistry ◽  
Structural Features ◽  
Pharmacological Properties ◽  
Antiprotozoal Activity ◽  
One Pot ◽  
Biological Assays ◽  
Structure Activity Relationships ◽  
Structure Activity ◽  
Synthetic Methodologies

Indazole is an important scaffold in medicinal chemistry. At present, the progress on synthetic methodologies has allowed the preparation of several new indazole derivatives with interesting pharmacological properties. Particularly, the antiprotozoal activity of indazole derivatives have been recently reported. Herein, a series of 22 indazole derivatives was synthesized and studied as antiprotozoals. The 2-phenyl-2H-indazole scaffold was accessed by a one-pot procedure, which includes a combination of ultrasound synthesis under neat conditions as well as Cadogan’s cyclization. Moreover, some compounds were derivatized to have an appropriate set to provide structure-activity relationships (SAR) information. Whereas the antiprotozoal activity of six of these compounds against E. histolytica, G. intestinalis, and T. vaginalis had been previously reported, the activity of the additional 16 compounds was evaluated against these same protozoa. The biological assays revealed structural features that favor the antiprotozoal activity against the three protozoans tested, e.g., electron withdrawing groups at the 2-phenyl ring. It is important to mention that the indazole derivatives possess strong antiprotozoal activity and are also characterized by a continuous SAR.

scholarly journals Interaction of gunshot residues (GSR) with natural and synthetic textiles having different structural features

Talanta Open ◽  
2020 ◽  
Vol 2 ◽  
pp. 100017
Author(s):  
Silvia Fabbris ◽  
Antonella Profumo ◽  
Gianluca Alberini ◽  
Sara Bonomi ◽  
Chiara Milanese ◽  
...  
Keyword(s):  
Structural Features ◽  
Gunshot Residues ◽  
Natural And Synthetic

Confining the Inner Space of Strained Carbon Nanorings

Synlett ◽  
2021 ◽  
Author(s):  
Oliver Dumele ◽  
Niklas Grabicki
Keyword(s):  
Materials Science ◽  
Perfect Match ◽  
Single Walled Carbon Nanotubes ◽  
Association Constants ◽  
Molecular Scaffolds ◽  
High Association ◽  
Fundamental Interest ◽  
Synthetic Methodologies ◽  
Walled Carbon Nanotubes ◽  
Carbon Nanorings

AbstractStrained aromatic macrocycles based on cycloparaphenylenes (CPPs) are the shortest repeating units of armchair single-walled carbon nanotubes. Since the development of several new synthetic methodologies for accessing these structures, their properties have been extensively studied. Besides the fundamental interest in these novel molecular scaffolds, their application in the field of materials science is an ongoing topic of research. Most of the reported CPP-type macrocycles display strong binding toward fullerenes, due to the perfect match between the convex and concave π-surfaces of fullerenes and CPPs, respectively. Highly functionalized CPP derivatives capable of supramolecular binding with other molecules are rarely reported. The synthesis of highly functionalized [n]cyclo-2,7-pyrenylenes leads to CPP-type macrocycles with a defined cavity capable of binding non-fullerene guests with high association constants.

scholarly journals Materials Science at Nankai: A Special Issue Dedicated to the 100th Anniversary of Nankai University

2020 ◽  
Vol 32 (3) ◽  
pp. 1907314
Author(s):  
Jialiang Xu ◽  
Fangyi Cheng ◽  
Xian‐He Bu ◽  
Jun Chen
Keyword(s):  
Materials Science ◽  
100Th Anniversary ◽  
Special Issue

scholarly journals Introduction: A Special Issue on Frontiers of Electron Microscopy in Materials Science

2006 ◽  
Vol 12 (6) ◽  
pp. 441-441
Author(s):  
Knut Urban ◽  
Joachim Mayer ◽  
Martina Luysberg ◽  
Karsten Tillmann
Keyword(s):  
Electron Microscopy ◽  
The Netherlands ◽  
Materials Science ◽  
Special Issue ◽  
International Character

This issue of Microscopy and Microanalysis contains contributions presented at the Frontiers of Electron Microscopy in Materials Science (FEMMS) meeting held in Kasteel Vaalsbroek, The Netherlands, on September 25–30, 2005. Tenth in the series of biennial conferences, the meeting focused on the latest developments in the field of advanced instrumentation and application of electron microscopy in materials science. The international character of this series of conferences was once again emphasized by the presence of over 140 delegates whose interests include academia, national laboratories, and industry from 16 countries representing all areas of the globe.

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