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7,526 Newest Publications about the topic molecular weight

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Cavity-containing supramolecular gels as a crystallization tool for hydrophobic pharmaceuticals

22-Jul-2016 | Lena Kaufmann; Stuart R. Kennedy; Christopher D. Jones; Jonathan W. Steed, Chemical Communication, 2016

We present two approaches to low-molecular-weight supramolecular gels bearing hydrophobic cavities based on calixarene-containing building blocks. Gels are formed by a calixarene based tetrahydrazide gelator or a co-gel of a calixarene diammonium salt and a bis-crown ether. The calixarene ...

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Iridium-catalysed dehydrocoupling of aryl phosphine–borane adducts: synthesis and characterisation of high molecular weight poly(phosphinoboranes)

22-Jul-2016 | Ursula S. D. Paul; Holger Braunschweig; Udo Radius, Chemical Communication, 2016

The thermal dehydrogenative coupling of aryl phosphine–borane adducts with iridium complexes bearing a bis(phosphinite) pincer ligand is reported. This catalysis produces high molecular weight poly(phosphinoboranes) [ArPH–BH2]n (Ar = Ph, pTol, Mes). Furthermore, we investigated the reactivity of ...

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Tunable hygromorphism: structural implications of low molecular weight gels and electrospun nanofibers in bilayer composites

19-Jul-2016 | Symone L. M. Alexander; LaShanda T. J. Korley, Soft Matter, 2016

This investigation highlights the potential for electrospun nanofiber mats and self-assembled nanofiber networks to be interfaced synergistically to induce hygromorphic behaviour. Control poly(vinyl alcohol) (PVA) electrospun active layers and 1,3:2,4-di-p-methylbenyliedene sorbitol (MDBS) ...

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Molecules, Vol. 21, Pages 854: Process of Fragment-Based Lead Discovery—A Perspective from NMR

16-Jul-2016 | Ma, Rongsheng ; Wang, Pengchao ; Wu, Jihui ; Ruan, Ke, Molecules, 2016

Fragment-based lead discovery (FBLD) has proven fruitful during the past two decades for a variety of targets, even challenging protein–protein interaction (PPI) systems. Nuclear magnetic resonance (NMR) spectroscopy plays a vital role, from initial fragment-based screening to lead generation, ...

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Synthesis and application of sodium 2‐acrylamido‐2‐methylpropane sulphonate/N‐vinylcaprolactam/divinyl benzene as a high‐performance viscosifier in water‐based drilling fluid

15-Jul-2016 | Binqiang Xie, Xiaodong Liu, Huiqiang Wang, Lihui Zheng, Journal of Applied Polymer Science, 2016

ABSTRACT Aiming at good thickening ability and temperature resistance in water‐based drilling fluid, a novel copolymer viscosifier (SDKP) of sodium 2‐acrylamido‐2‐methylpropane sulfonate (NaAMPS) with N‐vinylcaprolactam (NVCL) and cross‐linking divinylbenzene (DVB) was prepared by micellar ...

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Investigation of the Coupled Effects of Molecular Weight and Charge-Transfer Interactions on the Optical and Photochemical Properties of Dissolved Organic Matter

15-Jul-2016 | Garrett McKay; Kylie D. Couch; Stephen P. Mezyk; Fernando L. Rosario-Ortiz, Environmental Science & Technology, 2016

We studied the formation of photochemically produced reactive intermediates (RI) from dissolved organic matter (DOM). Specifically, we focused on the effects of variable molecular weight and chemical reduction on the optical properties of DOM (absorbance and fluorescence) and the formation of ...

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Behavior of Cholesterol and Catalysts in Supercritical Water

15-Jul-2016 | Jennifer N. Jocz; Phillip E. Savage, Energy & Fuels, 2016

Cholesterol reacted over 5 wt % Pt/C, 5 wt % Pd/C, and HZSM-5 in supercritical water at 400 °C. The major products with the Pt/C and Pd/C catalysts are cholesterol-derived steroids, polynuclear aromatic compounds, aliphatic hydrocarbons, and gases (H2, CH4, and C2H6), resulting from ...

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Development of tunable biodegradable polyhydroxyalkanoates microspheres for controlled delivery of tetracycline for treating periodontal disease

13-Jul-2016 | Nootchanartch Panith, Apinya Assavanig, Sittiwat Lertsiri, Magnus Bergkvist, Rudee Surarit, Nuttawee Niamsiri, Journal of Applied Polymer Science, 2016

ABSTRACT This article was aimed at preparation and characterization of drug delivery carriers made from biodegradable polyhydroxyalkanoates (PHAs) for slow release of tetracycline (TC) for periodontal treatment. Four PHA variants; polyhydroxybutyrate (PHB), ...

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Physicochemical Characterization of a Polysaccharide Fraction from Platycladus orientalis (L.) Franco and Its Macrophage Immunomodulatory and Anti-Hepatitis B Virus Activities

13-Jul-2016 | Zehua Lin; Wenzhen Liao; Jiaoyan Ren, Journal of Agricultural and Food Chemistry, 2016

A polysaccharide fraction, here called POP1, was purified from the leaves of Platycladus orientalis (L.) Franco by water extraction and alcohol precipitation. Physicochemical characterization indicated that POP1 had a relative molecular weight of 8.10 × 103 Da and consisted of rhamnose (5.74%), ...

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Living Polymer Chains with Predictable Molecular Weight and Dispersity via Carbanionic Polymerization in Continuous Flow: Mixing Rate as a Key Parameter

12-Jul-2016 | Jan Morsbach; Axel H. E. Müller; Elena Berger-Nicoletti; Holger Frey, Macromolecules, 2016

Aiming at systematic variation of the parameter dispersity, Đ (or “polydispersity”), living polymers with predictable dispersity (Đ = 1.15–2.20) and controlled molecular weights (Mn = 3200–18 500 g mol–1) were prepared via carbanionic polymerization. The approach relies on a continuous flow ...

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