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Chemical Society Reviews

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https://www.readbyqxmd.com/read/30226518/functionalised-heterogeneous-catalysts-for-sustainable-biomass-valorisation
#1
REVIEW
Putla Sudarsanam, Ruyi Zhong, Sander Van den Bosch, Simona M Coman, Vasile I Parvulescu, Bert F Sels
Efficient transformation of biomass to value-added chemicals and high-energy density fuels is pivotal for a more sustainable economy and carbon-neutral society. In this framework, developing potential cascade chemical processes using functionalised heterogeneous catalysts is essential because of their versatile roles towards viable biomass valorisation. Advances in materials science and catalysis have provided several innovative strategies for the design of new appealing catalytic materials with well-defined structures and special characteristics...
September 18, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30221274/oxidative-coupling-strategies-for-the-synthesis-of-indole-alkaloids
#2
REVIEW
Karre Nagaraju, Dawei Ma
Direct bond formation between two C-H bonds is most challenging but imperative for efficient organic synthesis. Recently, significant progress has been made in direct functionalization of indole through oxidative coupling reactions with other nucleophiles such as enolates and phenols. Both intermolecular and intramolecular coupling reactions can be conducted under the action of base/oxidants or oxidants alone. Coupling typically occurs at the 3-position of indole moiety due to intrinsic nucleophilicity at this position...
September 17, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30221267/functional-biodegradable-polymers-via-ring-opening-polymerization-of-monomers-without-protective-groups
#3
REVIEW
Greta Becker, Frederik R Wurm
Biodegradable polymers are of current interest and chemical functionality in such materials is often demanded in advanced biomedical applications. Functional groups often are not tolerated in the polymerization process of ring-opening polymerization (ROP) and therefore protective groups need to be applied. Advantageously, several orthogonally reactive functions are available, which do not demand protection during ROP. We give an insight into available, orthogonally reactive cyclic monomers and the corresponding functional synthetic and biodegradable polymers, obtained from ROP...
September 17, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30211916/catalysis-for-the-synthesis-of-methacrylic-acid-and-methyl-methacrylate
#4
REVIEW
Mohammad Jaber Darabi Mahboub, Jean-Luc Dubois, Fabrizio Cavani, Mohammad Rostamizadeh, Gregory S Patience
Methyl methacrylate (MMA) is a specialty monomer for poly methyl methacrylate (PMMA) and the increasing demand for this monomer has motivated industry to develop clean technologies based on renewable resources. The dominant commercial process reacts acetone and hydrogen cyanide to MMA (ACH route) but the intermediates (hydrogen cyanide, and acetone cyanohydrin) are toxic and represent an environmental hazard. Esterification of methacrylic acid (MAA) to MMA is a compelling alternative together with ethylene, propylene, and isobutene/t-butanol as feedstocks...
September 13, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30209490/quantum-dot-sensitized-solar-cells
#5
REVIEW
Zhenxiao Pan, Huashang Rao, Iván Mora-Seró, Juan Bisquert, Xinhua Zhong
Quantum dot-sensitized solar cells (QDSCs) have emerged as a promising candidate for next-generation solar cells due to the distinct optoelectronic features of quantum dot (QD) light-harvesting materials, such as high light, thermal, and moisture stability, facilely tunable absorption range, high absorption coefficient, multiple exciton generation possibility, and solution processability as well as their facile fabrication and low-cost availability. In recent years, we have witnessed a dramatic boost in the power conversion efficiency (PCE) of QDSCs from 5% to nearly 13%, which is comparable to other kinds of emerging solar cells...
September 13, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30206614/copper-boryl-mediated-organic-synthesis
#6
REVIEW
David Hemming, Russell Fritzemeier, Stephen A Westcott, Webster L Santos, Patrick G Steel
Organoboron compounds are valuable synthetic intermediates that find application in a diverse variety of processes including both C-X and C-C bond-forming transformations. This has been achieved by using a variety of boron derivatives. Of these, boronate esters are probably the most versatile and, reflecting this, methods for the generation of boronate esters are of considerable current interest. Given the mild reaction conditions, good functional group tolerance, and low cost of the metal catalyst, the use of copper-boryl reagents is particularly attractive...
September 12, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30206606/two-dimensional-materials-for-miniaturized-energy-storage-devices-from-individual-devices-to-smart-integrated-systems
#7
REVIEW
Panpan Zhang, Faxing Wang, Minghao Yu, Xiaodong Zhuang, Xinliang Feng
Nowadays, the increasing requirements of portable, implantable, and wearable electronics have greatly stimulated the development of miniaturized energy storage devices (MESDs). Electrochemically active materials and microfabrication techniques are two indispensable parts in MESDs. Particularly, the architecture design of microelectrode arrays is beneficial to the accessibility of two-dimensional (2D) active materials. Therefore, this study reviews the recent advancements in microbatteries and microsupercapacitors based on electrochemically active 2D materials...
September 12, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30206583/flexible-colloidal-nanocrystal-electronics
#8
REVIEW
Cherie R Kagan
Nanometer-scale crystals of bulk group IV, III-V, II-VI, IV-VI, I-III-VI2, and metal-halide perovskite semiconductors, dispersed in solvents, are known as colloidal nanocrystals and form an excellent, solution-processable materials class for thin film and flexible electronics. This review surveys the size, composition, and surface chemistry-dependent properties of semiconductor NCs and thin films derived therefrom and provides physico-chemical insight into the recent leaps forward in the performance of NC field-effect transistors...
September 12, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30206582/composition-modulation-in-one-dimensional-and-two-dimensional-chalcogenide-semiconductor-nanostructures
#9
Honglai Li, Xiao Wang, Xiaoli Zhu, Xiangfeng Duan, Anlian Pan
Low dimensional heterostructures have potential applications in information, sensing, and energy-related technologies. In order to obtain high-quality low dimensional heterostructures, an essential method is tuning chemical composition in a single nanostructure to obtain two or multiple components with well-matched electronic band structures. Here, we present a tutorial review of a unique chemical vapor growth approach with in situ switchable solid chemical sources that can build composition-modulated chalcogenide heterostructures in one-dimensional nanowires, quasi one-dimensional nanobelts and two-dimensional atomic layered nanosheets in a controlled manner...
September 12, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30204184/towards-operando-computational-modeling-in-heterogeneous-catalysis
#10
REVIEW
Lukáš Grajciar, Christopher J Heard, Anton A Bondarenko, Mikhail V Polynski, Jittima Meeprasert, Evgeny A Pidko, Petr Nachtigall
An increased synergy between experimental and theoretical investigations in heterogeneous catalysis has become apparent during the last decade. Experimental work has extended from ultra-high vacuum and low temperature towards operando conditions. These developments have motivated the computational community to move from standard descriptive computational models, based on inspection of the potential energy surface at 0 K and low reactant concentrations (0 K/UHV model), to more realistic conditions. The transition from 0 K/UHV to operando models has been backed by significant developments in computer hardware and software over the past few decades...
September 11, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30187042/peptide-supramolecular-materials-for-therapeutics
#11
Kohei Sato, Mark P Hendricks, Liam C Palmer, Samuel I Stupp
Supramolecular assembly of peptide-based monomers into nanostructures offers many promising applications in advanced therapies. In this Tutorial Review, we introduce molecular designs to control the structure and potential biological function of supramolecular assemblies. An emphasis is placed on peptide-based supramolecular nanostructures that are intentionally designed to signal cells, either directly through the incorporation of amino acid sequences that activate receptors or indirectly by recruiting native signals such as growth factors...
September 6, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30182110/mechanistic-view-of-ru-catalyzed-c-h-bond-activation-and-functionalization-computational-advances
#12
REVIEW
Chunhui Shan, Lei Zhu, Ling-Bo Qu, Ruopeng Bai, Yu Lan
Ru-Catalyzed aromatic C-H bond activation and functionalization have emerged as important topics because they have resulted in remarkable progress in organic synthesis. Both experimental and theoretical studies of their mechanisms are important for the design of new synthetic methodologies. In this review, a mechanistic view of the Ru-mediated C-H bond cleavage step is first given to reveal the C-H bond activation modes, including oxidative addition, metathesis and base-assisted deprotonation. In this process, directing groups play an important role in determining the reactivity of the C-H bond...
September 5, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30178796/flp-catalysis-main-group-hydrogenations-of-organic-unsaturated-substrates
#13
REVIEW
Jolie Lam, Kevin M Szkop, Eliar Mosaferi, Douglas W Stephan
This article is focused on recent developments in main group mediated hydrogenation chemistry and catalysis using "frustrated Lewis pairs" (FLPs). The broading range of substrates and catalyst systems is reviewed and the advances in catalytic reductions and the development of stereoselective, asymmetric reductions made since 2012 is considered.
September 4, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30177984/2d-pnictogens-alloy-based-anode-battery-materials-with-ultrahigh-cycling-stability
#14
REVIEW
Seyyed Mohsen Beladi-Mousavi, Martin Pumera
There is an increasing demand for efficient energy storage systems in our modern mobile society for a wide range of applications such as smart grids, portable electronic devices, and electric vehicles. The performance of advanced batteries in terms of energy density, power density, cyclability, and safety is mainly determined by the primary functional components, particularly by the electrode materials. Black phosphorus (BP) and the following elements in group V (pnictogens) including arsenic, antimony, and bismuth with layered structures have attracted tremendous attention to replace the graphite anode...
September 4, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30177983/liposomes-and-polymersomes-a-comparative-review-towards-cell-mimicking
#15
REVIEW
Emeline Rideau, Rumiana Dimova, Petra Schwille, Frederik R Wurm, Katharina Landfester
Cells are integral to all forms of life due to their compartmentalization by the plasma membrane. However, living organisms are immensely complex. Thus there is a need for simplified and controllable models of life for a deeper understanding of fundamental biological processes and man-made applications. This is where the bottom-up approach of synthetic biology comes from: a stepwise assembly of biomimetic functionalities ultimately into a protocell. A fundamental feature of such an endeavor is the generation and control of model membranes such as liposomes and polymersomes...
September 4, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30177982/advances-in-tailoring-luminescent-rare-earth-mixed-inorganic-materials
#16
Jing Liu, Anna M Kaczmarek, Rik Van Deun
This tutorial review focuses on the recent advances in the topic of mixed inorganic materials, specifically rare-earth mixed inorganic materials, which have similar crystal structures to the parent material. In this review we overview the available synthetic methods employed to prepare rare-earth mixed inorganic materials and the common approaches to characterize the differences in the crystal structures when the composition varies within the mixed material. The luminescence properties are investigated after adjusting the composition of the mixed material and doping with suitable lanthanides...
September 4, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30177975/macrocycles-and-cages-based-on-tetraphenylethylene-with-aggregation-induced-emission-effect
#17
REVIEW
Hai-Tao Feng, Ying-Xue Yuan, Jia-Bin Xiong, Yan-Song Zheng, Ben Zhong Tang
Organic molecules with an aggregation-induced emission (AIE) effect have recently been attracting more and more attention due to their colossal potential in solid emitters and chemo/biosensors. The number and variety of AIEgen compounds are expanding very rapidly to obtain better application performance and a wider area of application. Among AIEgen systems, tetraphenylethylene (TPE) and its derivatives are the class that have received the most extensive study and the most rapid development because of their facile synthesis...
September 4, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30175827/secondary-structures-in-synthetic-polypeptides-from-n-carboxyanhydrides-design-modulation-association-and-material-applications
#18
REVIEW
Ziyuan Song, Hailin Fu, Ruibo Wang, Lazaro A Pacheco, Xu Wang, Yao Lin, Jianjun Cheng
Synthetic polypeptides derived from the ring-opening polymerization of N-carboxyanhydrides can spontaneously fold into stable secondary structures under specific environmental conditions. These secondary structures and their dynamic transitions play an important role in regulating the properties of polypeptides in self-assembly, catalysis, polymerization, and biomedical applications. Here, we review the current strategies to modulate the secondary structures, and highlight the conformation-specific dynamic properties of synthetic polypeptides and the corresponding materials...
September 3, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30175351/biochemical-sensing-with-macrocyclic-receptors
#19
REVIEW
Roberta Pinalli, Alessandro Pedrini, Enrico Dalcanale
Preventive healthcare asks for the development of cheap, precise and non-invasive sensor devices for the early detection of diseases and continuous population screening. The actual techniques used for diagnosis, e.g. MRI and PET, or for biochemical marker sensing, e.g. immunoassays, are not suitable for continuous monitoring since they are expensive and prone to false positive responses. Synthetic supramolecular receptors offer new opportunities for the creation of specific, selective and cheap sensor devices for biological sensing of specific target molecules in complex mixtures of organic substances...
September 3, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/30175338/self-immolative-colorimetric-fluorescent-and-chemiluminescent-chemosensors
#20
Jiatao Yan, Songyi Lee, Afang Zhang, Juyoung Yoon
Self-immolative chemistry features a cascade of disassembly reactions in response to external stimuli, which provides great opportunities to design new self-immolative chemosensors with advanced performance and/or functions. Self-immolative spacers in these chemosensors not only facilitate the linkage of designed triggers to various chromophores or fluorophores, but can also be used to solve inherent problems associated with native chemosensors, such as low reactivities, poor stabilities and slow response times...
September 3, 2018: Chemical Society Reviews
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