Abstract Supramolecular chemistry is a field of scientific exploration that probes the relationship between molecular structure and function. It noncovalent bond, which forms basis highly specific recognition, transport, regulation events actuate biological processes. The classic design principles supramolecular include strong, directional interactions like hydrogen bonding, halogen cation–π complexation, as well less forces ion pairing, π–π, solvophobic, van der Waals potentials. In recent...

The basis for unprecedented noncovalent bonding between anions and the aryl centroid of electron-deficient aromatic rings has been demonstrated by an ab initio study interaction 1,3,5-triazine fluoride, chloride, azide ion at MP2 level theory. Minima are also located corresponding to C[bond]H...X(-) hydrogen bonding, reactive complexes nucleophilic attack on triazine ring, pi-stacking interactions (with azide). Trifluoro-1,3,5-triazine participates in complexation forms with anions. This...

Fueling up with furans: Cellulose can be converted into furanic biofuels in unprecedented yields using an inexpensive, simple process involving concurrent hydrolysis, dehydration, and chlorine substitution reactions coupled continuous extraction organic phase (see scheme). Furanic ethers, such as those that derived from the products above, are known diesel additives.

Doping polymeric semiconductors often drastically reduces the solubility of polymer, leading to difficulties in processing doped films.

Abstract Dehydration of biomass‐derived levulinic acid under solid catalysis and treatment the resulting angelica lactone with catalytic K 2 CO 3 produces dimer in excellent yield. This serves as a novel feedstock for hydrodeoxygenation, which proceeds relatively mild conditions combination oxophilic metal noble catalysts to yield branched C 7 –C 10 hydrocarbons gasoline volatility range. Considering that is available >80 % conversion from raw biomass, field‐to‐tank drop‐in, cellulosic...

How does one find out whether an interesting water aggregate observed in organic crystal structure is novel? The first place to look the Cambridge Structural Database (CSD). data are there, but analysis difficult and it not routinely done. result? Many of chains, rings, sheets, clusters reported as novel recent literature actually redundant with published structures CSD.

The interaction of two suitably designed complementary ditopic molecular components (1,2) and (3,4) generates spontaneously an organized supramolecular architecture displaying sorting orientation.

5-(Hydroxymethyl)furfural, levulinic acid, ethyl levulinate and butyl are produced by the solvolysis of 5-(chloromethyl)furfural (CMF). Since CMF can be derived in high yield from sugars, cellulose, or lignocellulosic feedstocks, process described here presents an efficient entry into value-added manifold biomass-derived products relevance to organic materials fuel industries.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEudistomins A-Q, .beta.-carbolines from the antiviral Caribbean tunicate Eudistoma olivaceumKenneth L. Rinehart Jr., Junichi Kobayashi, Gary C. Harbour, Jeremy Gilmore, Mark Mascal, Tom G. Holt, Lois S. Shield, and Francoise LafargueCite this: J. Am. Chem. Soc. 1987, 109, 11, 3378–3387Publication Date (Print):May 1, 1987Publication History Published online1 May 2002Published inissue 1...

CMF from biomass ten times faster: Sugars, cellulose, and corn stover are converted into 5-(chloromethyl)furfural (CMF) in only 3 h by digestion with hydrochloric acid a closed, biphasic reactor at 80–100 °C >80 % isolated yield. Under the same conditions, chitin gives mixture of levulinic combined yield 74 %.

A fluoride sandwich: cylindrophane macrocycle framed with cyanuric acid rings selectively complexes ion by a combination of anion–π interactions and ion-pair-reinforced hydrogen bonds. This compound is the first example purpose-designed host that exploits bonding. Supporting information for this article available on WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z704005_s.pdf or from author. Please note: The publisher not responsible content functionality any supporting supplied...

Furane für den Motor: Cellulose lässt sich in zuvor unerreichten Ausbeuten Furanbiokraftstoffe umwandeln. Dabei kommt ein einfaches, billiges Verfahren mit zeitgleicher Hydrolyse, Dehydrierung und Chlorsubstitution Kombination fortlaufender Extraktion eine organische Phase zum Einsatz (siehe Schema). Furanether, wie sie aus gezeigten Produkten erhalten werden können, sind bekannte Dieselzusatzstoffe.

Abstract This review provides a technical description of the range commercial products that can be accessed from n‐butanol, with specific emphasis on n‐butanol derived renewable sources (biobutanol). n‐Butanol itself and primary derivatives in which oxygen functionality molecule is retained (butyraldehyde butyric acid) have mainstream applications solvent, polymer, fuel oxygenate, and/or specialty chemical markets, while butanol dehydration (butenes butadiene) present additional...

Recently, a new processing technique was developed that converts the carbohydrates found in plant biomass into ethyl levulinate, which has properties making it possible diesel fuel oxygenate additive. Additionally, applied to oil-containing seeds can create biodiesel at high yields, while possibly enhancing cold flow commonly plague fuels. The first part of this two-part study focused on levulinate as additive, by investigating volatility petroleum diesel/ethyl mixtures. Volatility measured...

Abstract Charge transport in conjugated polymer semiconductors has traditionally been thought to be limited a low-mobility regime by pronounced energetic disorder. Much progress recently made advancing carrier mobilities field-effect transistors through developing low-disorder polymers. However, diodes these polymers have date not shown much improved mobilities, presumably reflecting the fact that lower concentrations are available fill up residual tail states density of states. Here, we...

5-(Chloromethyl)furfural (CMF) is a carbohydrate-derived platform molecule that gaining traction as more practical alternative to 5-(hydroxymethyl)furfural (HMF). This perspective introduces the chemocatalytic approach biorefining driving force behind development of multifunctional chemical platforms. The main advantage CMF over HMF it can be produced in high yield under mild conditions directly from raw biomass. Its stability and hydrophobicity markedly facilitate isolation. also precursor...

To overcome the poor solubility of widely used p-type dopant 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ), we have synthesized a series structure-modified, organic dopants to include alkyl ester groups designed enable and miscibility control. UV–vis–NIR cyclic voltammetry measurements show increased mono- diester substituted with only modest changes acceptor strength. Using absorption spectroscopy, photoluminescence, in-plane conductivity measurements, demonstrate that new...

5-(Chloromethyl)furfural (CMF) is a disruptive innovation in the biorefinery. Chemically, it at least as versatile well-known HMF but, unlike HMF, accessible high yield directly from cellulosic biomass due to its lipophilicity and stability under acidic conditions, which facilitate isolation. It has rich derivative chemistry that includes biofuels, renewable polymers, specialty chemicals, value-added agrochemical pharmaceutical products.

Molecular doping of semiconducting polymers has emerged as a prominent research topic in the field organic electronics, with new dopant molecules introduced regularly. FeCl3 gained attention p-type due to its low cost, availability, ability dope high ionization energy copolymers, and use that can be used anion exchange. Here, we combination UV–vis–NIR spectroscopy, four-probe sheet resistance measurements, X-ray absorption near-edge structure (XANES) spectroscopy perform lifetime...

The programmed self-association of the self-complementary nucleotide-like pyrimidinone 5 and pyrimidinedione 6, generates, as predicted, organized supramolecular ribbons. crystal structure such a species has been determined. A similar entity is obtained from pyrimidinetriamine 12 with solvent participation, giving quadruply hydrogen-bonded ribbon, whose also These processes give access to designed generation arrays functional substituents.

Room for a small one: A series of [1,3,5]cyclophane-based receptors incorporating triazine, cyanuric acid, or boroxine rings are predicted to strongly complex fluoride ions by combination anion–π interactions and ion-pair reinforced hydrogen bonding, while size-excluding the larger chloride anion. The top view calculated structure triazine cage with an included ion is shown.

Abstract Die supramolekulare Chemie ist ein Gebiet, das die Beziehung zwischen molekularer Struktur und Funktion erforscht. Es der nichtkovalenten Bindung, Grundlage spezifischen Erkennung Transport‐ Regulationsvorgänge bildet, biologische Vorgänge antreiben. klassischen Konstruktionsprinzipien supramolekularen umfassen starke, gerichtete Wechselwirkungen wie Wasserstoffbrücken, Halogenbrücken Kation‐π‐Komplexbildung, aber auch weniger Kräfte Ionenpaarung, π‐π‐, solvophobe...

From biomass to mass transportation: Waste (newspaper, corn stover, straw, and wood) is converted into biofuel precursors value-added products in excellent yield using a simple, inexpensive process involving concurrent hydrolysis, dehydration, substitution reactions biphasic reactor. The hemicellulose fraction of these substrates simultaneously furfural, together constitute an efficient means for the total exploitation carbohydrate content biomass.

A simple, non-fermentative, high-yielding, metal-free, chemical-catalytic pathway to succinic acid from biomass-derived levulinic is reported.