Read by QxMD icon Read

Topics in Current Chemistry (Journal)

Richard S Glass
The present review highlights recent developments in the chemistry of sulfur radicals. Background material essential to the understanding of these developments is briefly reviewed and references to previous in depth reviews are cited. The exciting applications of current research involving sulfur radicals in bonding theory, organic synthesis, polymer chemistry, materials science, and biochemistry are outlined.
May 9, 2018: Topics in Current Chemistry (Journal)
Ayesha Khan, Vaishakh Nair, Juan Carlos Colmenares, Roger Gläser
Depleting conventional fuel reserves has prompted the demand for the exploration of renewable resources. Biomass is a widely available renewable resource that can be valorized to produce fuels, chemicals, and materials. Among all the fractions of biomass, lignin has been underutilized. Due to its complex structure, recalcitrant nature, and heterogeneity, its valorization is relatively challenging. This review focuses on the utilization of lignin for the preparation of composite materials and their application in the field of photocatalysis and photovoltaics...
May 2, 2018: Topics in Current Chemistry (Journal)
Anchal Singhal
Calixphyrins are hybrid macrocycles that contain both sp2 - and sp3 -hybridized carbon atoms and hence bear analogy to both porphyrins and calixpyrroles. Due to the presence of sp3 -hybridized carbon atoms, π-conjugation is disrupted in calixphyrins, which leads to conformational flexibility. Hence, these molecules find a use in anion binding, host-guest chemistry and metal-coordination chemistry. During the last decade, studies on calixphyrins have been a topic of wide interest to researchers. Various functionalities have been introduced to the structure of calixphyrins, leading to the development of expanded calixphyrins, core-modified calixphyrins and N-confused calixphyrins with diverse applications...
May 2, 2018: Topics in Current Chemistry (Journal)
Nav Nidhi Rajput, Trevor J Seguin, Brandon M Wood, Xiaohui Qu, Kristin A Persson
Fundamental molecular-level understanding of functional properties of liquid solutions provides an important basis for designing optimized electrolytes for numerous applications. In particular, exhaustive knowledge of solvation structure, stability, and transport properties is critical for developing stable electrolytes for fast-charging and high-energy-density next-generation energy storage systems. Accordingly, there is growing interest in the rational design of electrolytes for beyond lithium-ion systems by tuning the molecular-level interactions of solvate species present in the electrolytes...
April 26, 2018: Topics in Current Chemistry (Journal)
Francisco G Calvo-Flores, María José Monteagudo-Arrebola, José A Dobado, Joaquín Isac-García
Chemical reactions and many of the procedures of separation and purification employed in industry, research or chemistry teaching utilize solvents massively. In the last decades, with the birth of Green Chemistry, concerns about the employment of solvents and the effects on human health, as well as its environmental impacts and its dependence on non-renewable raw materials for manufacturing most of them, has drawn the attention of the scientific community. In this work, we review the concept of green solvent and the properties and characteristics to be considered green...
April 24, 2018: Topics in Current Chemistry (Journal)
Axel Groß
There is a strong need to improve the efficiency of electrochemical energy storage, but progress is hampered by significant technological and scientific challenges. This review describes the potential contribution of atomic-scale modeling to the development of more efficient batteries, with a particular focus on first-principles electronic structure calculations. Numerical and theoretical obstacles are discussed, along with ways to overcome them, and some recent examples are presented illustrating the insights into electrochemical energy storage that can be gained from quantum chemical studies...
April 23, 2018: Topics in Current Chemistry (Journal)
Johannes Kasnatscheew, Ralf Wagner, Martin Winter, Isidora Cekic-Laskovic
Energy storage is considered a key technology for successful realization of renewable energies and electrification of the powertrain. This review discusses the lithium ion battery as the leading electrochemical storage technology, focusing on its main components, namely electrode(s) as active and electrolyte as inactive materials. State-of-the-art (SOTA) cathode and anode materials are reviewed, emphasizing viable approaches towards advancement of the overall performance and reliability of lithium ion batteries; however, existing challenges are not neglected...
April 18, 2018: Topics in Current Chemistry (Journal)
James D Neuhaus, Rik Oost, Jérémy Merad, Nuno Maulide
Traditionally employed in the synthesis of small ring systems and rearrangement chemistry, sulfur-based ylides occupy a unique position in the toolbox of the synthetic organic chemist. In recent years a number of pioneering researchers have looked to expand the application of these unorthodox reagents through the use of transition metal catalysis. The strength and flexibility of such a combination have been shown to be of key importance in developing powerful novel methodologies. This chapter summarises recent developments in transition metal-catalysed sulfonium/sulfoxonium ylide reactions, as well as providing a historical perspective...
April 13, 2018: Topics in Current Chemistry (Journal)
Shinya Otsuka, Keisuke Nogi, Hideki Yorimitsu
This review first briefly summarizes stoichiometric C-S bond activation by transition metal complexes and then focuses on catalytic synthetic reactions involving C-S bond activation.
April 10, 2018: Topics in Current Chemistry (Journal)
Ming Wang, Xuefeng Jiang
Disulfide, as a common structural motif, has been frequently used in pharmaceuticals, nature products, and chemical biology. This chapter focuses on the methodologies that were reported recently for the synthesis of disulfide-containing compounds with particular emphasis on the synthesis of unsymmetrical disulfides. The presentation is organized according to the structure of the disulfides and the synthetic method.
April 10, 2018: Topics in Current Chemistry (Journal)
Yoshito Tobe
Three isomers of quinodimethanes (QDMs) adopt different electronic configurations and geometries, generating their own characteristic physical properties. Incorporation of QDMs into non-benzenoid aromatic or antiaromatic frameworks not only planarizes the whole π system optimizing conjugation, but also changes the electronic properties inherent to QDMs, sometimes drastically, due to the topology of the π system, through interaction with the remaining part of the molecules. In non-benzenoid systems, molecular orbital levels and orbital distribution are uneven compared to benzenoid systems, thereby polarizing the ground state and leading to unique behavior in excited states...
March 20, 2018: Topics in Current Chemistry (Journal)
Margherita Maiuri, Johanna Brazard
During the last two decades, 2D optical techniques have been extended to the visible range, targeting electronic transitions. Since the report of the very first 2D electronic measurement (Hybl et al. in J Chem Phys 115:6606-6622, [2001]), two-dimensional electronic spectroscopy (2DES) has allowed fundamentally new insights into the structure and dynamics of condensed-phase systems (Ginsberg et al. in Acc Chem Res 42:1352-1363, 2009; Jonas in Annu Rev Phys Chem 54:425-463, 2003), producing experiments that measure correlations among electronic states of an absorbing species within complex systems...
March 20, 2018: Topics in Current Chemistry (Journal)
Abhishek Khetan, Dilip Krishnamurthy, Venkatasubramanian Viswanathan
One route toward sustainable land and aerial transportation is based on electrified vehicles. To enable electrification in transportation, there is a need for high-energy-density batteries, and this has led to an enormous interest in lithium-oxygen batteries. Several critical challenges remain with respect to realizing a practical lithium-oxygen battery. In this article, we present a detailed overview of theoretical efforts to formulate design principles for identifying stable electrolytes and electrodes with the desired functionality and stability...
March 20, 2018: Topics in Current Chemistry (Journal)
Abhishek Lahiri, Natalia Borisenko, Frank Endres
Electrode materials as well as the electrolytes play a decisive role in batteries determining their performance, safety, and lifetime. In the last two decades, different types of batteries have evolved. A lot of work has been done on lithium ion batteries due to their technical importance in consumer electronics, however, the development of post-lithium systems has become a focus in recent years. This chapter gives an overview of various battery materials, primarily focusing on development of electrode materials in ionic liquids via electrochemical route and using ionic liquids as battery electrolyte components...
February 21, 2018: Topics in Current Chemistry (Journal)
E B Mubofu, J E Mgaya
Cashew nut shells are agro-wastes produced from cashew nut processing factories and contain about 30-35 wt% oil called cashew nut shell liquid (CNSL). This liquid is a mixture of four potential compounds, namely anacardic acid, cardanol, cardol and 2-methyl cardol. Various reactions have been developed to convert the components of cashew nut shell liquid into industrially important chemicals, and these materials are herein described. Such reactions employed in the transformation include transfer hydrogenation reactions, isomerization reactions, metathesis reactions, carbonylation reactions, polymerization reactions, isomerizing metathesis reaction, and isomerizing carbonylation reactions...
February 13, 2018: Topics in Current Chemistry (Journal)
Mangesh I Chaudhari, Ajay Muralidharan, Lawrence R Pratt, Susan B Rempe
Progress in understanding liquid ethylene carbonate (EC) and propylene carbonate (PC) on the basis of molecular simulation, emphasizing simple models of interatomic forces, is reviewed. Results on the bulk liquids are examined from the perspective of anticipated applications to materials for electrical energy storage devices. Preliminary results on electrochemical double-layer capacitors based on carbon nanotube forests and on model solid-electrolyte interphase (SEI) layers of lithium ion batteries are considered as examples...
February 12, 2018: Topics in Current Chemistry (Journal)
Jian Lu, Xian Li, Yaqing Zhang, Harold Y Hwang, Benjamin K Ofori-Okai, Keith A Nelson
Multidimensional spectroscopy in the visible and infrared spectral ranges has become a powerful technique to retrieve dynamic correlations and couplings in wide-ranging systems by utilizing multiple correlated light-matter interactions. Its extension to the terahertz (THz) regime of the electromagnetic spectrum, where rich material degrees of freedom reside, however, has been progressing slowly. This chapter reviews some of the THz-frequency two-dimensional (2D) spectroscopy techniques and experimental results realized in recent years...
January 23, 2018: Topics in Current Chemistry (Journal)
Kevin A Scott, Jon T Njardarson
In this review, we discuss all sulfur-containing FDA-approved drugs and their structures. The second section of the review is dedicated to structural analysis and is divided into 14 subsections, each focusing on one type of sulfur-containing moiety. A concise graphical representation of each class features drugs that are organized on the basis of structural similarity, evolutionary relevance, and medical indication. This review offers a unique and comprehensive overview of the structural features of all sulfur-containing FDA-approved drugs to date...
January 22, 2018: Topics in Current Chemistry (Journal)
Il Jeon, Yutaka Matsuo, Shigeo Maruyama
Photovoltaics, more generally known as solar cells, are made from semiconducting materials that convert light into electricity. Solar cells have received much attention in recent years due to their promise as clean and efficient light-harvesting devices. Single-walled carbon nanotubes (SWNTs) could play a crucial role in these devices and have been the subject of much research, which continues to this day. SWNTs are known to outperform multi-walled carbon nanotubes (MWNTs) at low densities, because of the difference in their optical transmittance for the same current density, which is the most important parameter in comparing SWNTs and MWNTs...
January 22, 2018: Topics in Current Chemistry (Journal)
Vânia G Zuin, Luize Z Ramin
New generations of biorefinery combine innovative biomass waste resources from different origins, chemical extraction and/or synthesis of biomaterials, biofuels, and bioenergy via green and sustainable processes. From the very beginning, identifying and evaluating all potentially high value-added chemicals that could be removed from available renewable feedstocks requires robust, efficient, selective, reproducible, and benign analytical approaches. With this in mind, green and sustainable separation of natural products from agro-industrial waste is clearly attractive considering both socio-environmental and economic aspects...
January 17, 2018: Topics in Current Chemistry (Journal)
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"