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Inorganic, Hybridized and Living Macrocellular Foams: “Out of the Box” Heterogeneous Catalysis
Abstract With this personal account we show how the Integrative Chemistry, when combining the sol‐gel process and concentrated emulsions, allows to trigger inorganic, hybrid or living materials when dedicated toward heterogeneous catalysis applications. In here we focus on 3D‐macrocellular monolithic foams bearing hierarchical porosities and applications thereof toward heterogeneous catalysis where both activities and mass transport are enhanced. We thereby first depict the general background of emulsions, focusing on concentrated ones, acting as soft templates for the design of solid (HIPE) foams, HIPE being the acron...
Source: Contrast Media and Molecular Imaging - December 1, 2017 Category: Radiology Authors: Armand Roucher, Martin Depardieu, Deniz Pekin, Micka ël Morvan, Rénal Backov Tags: Personal Account Source Type: research

Functional Carbon Quantum Dots: A Versatile Platform for Chemosensing and Biosensing
Abstract Carbon quantum dot has emerged as a new promising fluorescent nanomaterial due to its excellent optical properties, outstanding biocompatibility and accessible fabrication methods, and has shown huge application perspective in a variety of areas, especially in chemosensing and biosensing applications. In this personal account, we give a brief overview of carbon quantum dots from its origin and preparation methods, present some advance on fluorescence origin of carbon quantum dots, and focus on development of chemosensors and biosensors based on functional carbon quantum dots. Comprehensive advances on functional c...
Source: Contrast Media and Molecular Imaging - November 24, 2017 Category: Radiology Authors: Hui Feng, Zhaosheng Qian Tags: Personal Account Source Type: research

Chemistry in Confinement: Copper and Palladium Catalyzed Ecofriendly Organic Transformations within Porous Frameworks
Abstract A concise account on the use of transition metals copper (Cu) and palladium (Pd), as their cations as well as nanoparticles exchanged/immobilized onto porous frameworks such as zeolites, metal organic frameworks (MOFs), covalent organic polymers (COPs) and hollow nanostructures, functioning as catalysts in organic synthesis is presented. This biomimetic account, “focusing on catalytic systems in confinement” within zero‐dimensional microenvironments and second sphere coordination covers primarily results from our group on N‐sulfonylketenimine mediated cycloaddition, hydrogenation and C−C bond forming rea...
Source: Contrast Media and Molecular Imaging - November 24, 2017 Category: Radiology Authors: Basuvaraj Suresh Kumar, Kasi Pitchumani Tags: Personal Account Source Type: research

Study of the Air ‐Tolerant 1,3‐Diphosphacyclobutane‐2,4‐diyl through the Direct Arylation
Abstract Installing π‐functional substituents on the skeletal phosphorus atoms of the air‐tolerant 1,3‐diphosphacyclobutane‐2,4‐diyl unit are promising for tuning the open‐shell singlet P‐heterocyclic chromophore. The sterically encumbered 1,3‐diphosphaCycloButen‐4‐yl Anion (CBA), generated from the phosphorus‐carbon triple bond, was available for the regioselective arylation via nucleophilic aromatic substitution (SNAr) reaction, addition to arynes, and single‐electron transfer (SET) process affording the corresponding P‐arylated 1,3‐diphosphacyclobutane‐2,4‐diyls. The photo‐absorption a...
Source: Contrast Media and Molecular Imaging - November 14, 2017 Category: Radiology Authors: Shigekazu Ito Tags: Personal Account Source Type: research

Transmembrane Signaling with Lipid ‐bilayer Assemblies as a Platform for Channel‐based Biosensing
Abstract Artificial and natural lipid membranes that elicit transmembrane signaling is are useful as a platform for channel‐based biosensing. In this account we summarize our research on the design of transmembrane signaling associated with lipid bilayer membranes containing nanopore‐forming compounds. Channel‐forming compounds, such as receptor ion‐channels, channel‐forming peptides and synthetic channels, are embedded in planar and spherical bilayer lipid membranes to develop highly sensitive and selective biosensing methods for a variety of analytes. The membrane‐bound receptor approach is useful for introdu...
Source: Contrast Media and Molecular Imaging - November 14, 2017 Category: Radiology Authors: Masao Sugawara Tags: Personal Account Source Type: research

Polydopamine Based Colloidal Materials: Synthesis and Applications
Abstract Polydopamine is a synthetic analogue of natural melanin (eumelanin) produced from oxidative polymerization of dopamine. Owing to its strong adhesion ability, versatile chemical reactivity, biocompatibility and biodegradation, polydopamine is commonly applied as a versatile linker to synthesize colloidal materials with diverse structures, unique physicochemical properties and tunable functions, which allow for a broad scope of applications including biomedicine, sensing, catalysis, environment and energy. In this personal account, we discuss first about the different synthetic approaches of polydopamine, as well as...
Source: Contrast Media and Molecular Imaging - November 10, 2017 Category: Radiology Authors: Ziwei Deng, Bin Shang, Bo Peng Tags: Personal Account Source Type: research

Changing Perspectives on the Strategic use of Microwave Heating in Organic Synthesis
Abstract This Personal Account describes collaborative investigations into apocryphal microwave effects in organic chemistry. Focused research on microwave‐assisted organic synthesis has been fraught with confusion, controversy, and misinformation. Microwave heating is an undoubtedly useful tactic for organic synthesis, but whether or not it can offer strategic advantages remains an open question in the minds of many people. (Ironically, those who do not consider it an open question are split as to whether it has been resolved affirmatively or negatively.) Our research in this area is guided by the hypothesis that microw...
Source: Contrast Media and Molecular Imaging - October 18, 2017 Category: Radiology Authors: Gregory B. Dudley, A. E. Stiegman Tags: Personal Account Source Type: research

Plasmon ‐Exciton Coupling Interaction for Surface Catalytic Reactions
Abstract In this review, we firstly reveal the physical principle of plasmon‐exciton coupling interaction with steady absorption spectroscopy, and ultrafast transition absorption spectroscopy, based on the pump‐prop technology. Secondly, we introduce the fabrication of electro‐optical device of two‐dimensional semiconductor‐nanostructure noble metals hybrid, based on the plasmon‐exciton coupling interactions. Thirdly, we introduce the applications of plasmon‐exciton coupling interaction in the field of surface catalytic reactions. Lastly, the perspective of plasmon‐exciton coupling interaction and applicati...
Source: Contrast Media and Molecular Imaging - October 16, 2017 Category: Radiology Authors: Jingang Wang, Weihua Lin, Xuefeng Xu, Fengcai Ma, Mengtao Sun Tags: Personal Account Source Type: research

Li4Ti5O12 Anode: Structural Design from Material to Electrode and the Construction of Energy Storage Devices
Abstract Spinel Li4Ti5O12, known as a zero‐strain material, is capable to be a competent anode material for promising applications in state‐of‐art electrochemical energy storage devices (EESDs). Compared with commercial graphite, spinel Li4Ti5O12 offers a high operating potential of ∼1.55 V vs Li/Li+, negligible volume expansion during Li+ intercalation process and excellent thermal stability, leading to high safety and favorable cyclability. Despite the merits of Li4Ti5O12 been presented, there still remains the issue of Li4Ti5O12 suffering from poor electronic conductivity, manifesting disadvantageous rate perfor...
Source: Contrast Media and Molecular Imaging - October 12, 2017 Category: Radiology Authors: Zhijie Chen, Honsen Li, Langyuan Wu, Xiaoxia Lu, Xiaogang Zhang Tags: Personal Account Source Type: research

Structural Mimics of Phenyl Pyridine (ppy) – Substituted, Phosphorescent Cyclometalated Homo and Heteroleptic Iridium(III) Complexes for Organic Light Emitting Diodes – An Overview
Abstract Today organic light emitting diodes are a topic of significant academic and industrial research interest. OLED technology is used in commercially available displays, and efforts have been directed to improve this technology. Design and synthesis of phosphorescent based transition metals are capable of harvesting both singlet and triplet excitons and achieve 100 % internal quantum efficiency is an active area of research. Among all the transition metals, iridium is considered a prime candidate for OLEDs due to its prominent photophysical characteristics. In the present review, we have concentrated on the Iridium ...
Source: Contrast Media and Molecular Imaging - September 20, 2017 Category: Radiology Authors: Aravind Babu Kajjam, Sivakumar Vaidyanathan Tags: Personal Account Source Type: research

Advanced Materials Based on Polymers and Ionic Liquids
Abstract Ionic liquids (ILs) are ambient temperature molten salts, which have attracted considerable attention owing to their unique properties. In this contribution, we review advanced materials composed of ILs and polymers for the basis of a new design protocol to fabricate novel materials. As electrolytes for electrochemical devices, cross‐linked polymers containing ILs (ion gels) are endowed with functional properties inherited from ILs and mechanical consistency derived from polymers. To create such materials, micro‐phase separation of block copolymers and colloidal arrays in the ILs are utilized. Based on the mol...
Source: Contrast Media and Molecular Imaging - September 19, 2017 Category: Radiology Authors: Yuzo Kitazawa, Kazuhide Ueno, Masayoshi Watanabe Tags: Personal Account Source Type: research

Colloidal Supercapattery: Redox Ions in Electrode and Electrolyte
Abstract Redox chemistry is the cornerstone of various electrochemical energy conversion and storage systems, associated with ion diffusion process. To actualize both high energy and power density in energy storage devices, both multiple electron transfer reaction and fast ion diffusion occurred in one electrode material are prerequisite. The existence forms of redox ions can lead to different electrochemical thermodynamic and kinetic properties. Here, we introduce novel colloid system, which includes multiple varying ion forms, multi‐interaction and abundant redox active sites. Unlike redox cations in solution and cryst...
Source: Contrast Media and Molecular Imaging - September 11, 2017 Category: Radiology Authors: Kunfeng Chen, Dongfeng Xue Tags: Personal Account Source Type: research

Selective Synthesis of Fluorine ‐Containing Cyclic β‐Amino Acid Scaffolds
Abstract Fluorine‐containing organic molecules have generated increasing impact in drug research over the past decade. Their preparation and development of novel synthetic methods towards new types of fluorinated molecules among them of β‐amino acid derivatives has received large interest. Our research group have designed various highly selective and stereocontrolled methods for the construction of fluorine‐containing cyclic β‐amino acid derivatives. The synthetic approaches developed for the synthesis of various pharmacologically interesting cyclic β‐amino acid derivatives as monomers with multiple stereogeni...
Source: Contrast Media and Molecular Imaging - September 11, 2017 Category: Radiology Authors: Lor ánd Kiss, Ferenc Fülöp Tags: Personal Account Source Type: research

Metal ‐Organic Frameworks (MOFs) as Functional Supramolecular Architectures for Anion Recognition and Sensing
Abstract Metal‐organic frameworks (MOFs) have experienced a tremendous growth during last few decades as porous crystalline molecular materials. The comprehensive effect of structural diversity, tunability and high surface area makes MOFs suitable for multifarious applications. MOFs can act as potential receptors toward different target components along with ionic species, small molecules, solvents, explosives etc. Anion recognition remains an important phenomena due to its involvement in many chemical and biological processes. Ligand designing, incorporation of appropriate functional groups and post‐synthetic modifica...
Source: Contrast Media and Molecular Imaging - September 6, 2017 Category: Radiology Authors: Tarak Nath Mandal, Avishek Karmakar, Shivani Sharma, Sujit K. Ghosh Tags: Personal Account Source Type: research

Journey Heading towards Enantioselective Synthesis Assisted by Organocatalysis
Abstract This personal account summarizes the design of various organocatalysts derived from amino acids and Cinchona alkaloids and their applications in enantioselective carbon‐carbon and carbon‐nitrogen bond formation reactions. This account begins with the short description of the background of asymmetric organocatalysis. Various types of reactions like aldol reaction, Michael reaction, aza‐Henry reaction, Morita‐Baylis‐Hillman reaction are described in this account. (Source: Contrast Media and Molecular Imaging)
Source: Contrast Media and Molecular Imaging - August 29, 2017 Category: Radiology Authors: Jasneet Kaur, Pankaj Chauhan, Sarbjit Singh, Swapandeep Singh Chimni Tags: Personal Account Source Type: research