After exposure of bacteria to equal concentrations of cis-diamminedichloroplatinum(II) (DDP) and cis-diamminetetrachloroplatinum(IV) (DTP), the intracellular concentration of DTP was an order of magnitude greater than DDP. However, at identical intracellular drug concentrations, the Pt(IV) compo...

The crystal structure of deuterated magnesium fluosilicate hexahydrate at 313 K has been refined using neutron diffraction (F(000) = 40.38, Dx = 1.85g cm−3, μ = 0.30 cm−1 (evaluated), space groupP3¯ (147), trigonal, Z = 3, a = 9.556 (15)Å,c = 9.738 (19)Å,V = 770 (4)Å3). A finalR-factor of 0.11...

Mechanically milling ammonia borane and lithium borohydride in equivalent molar ratio results in the formation of a new complex, LiBH4·NH3BH3. Its structure was successfully determined using combined X-ray diffraction and first-principles calculations. LiBH4·NH3BH3 was carefully studied in ter...

In this study, we report a novel and facile synthesis approach of boron-rich transition metal borides such as LaB6 and TiB2 through reaction of lithium borohydride (LiBH4) with corresponding metal hydroxide or oxide at temperatures below 600 °C. A fast endothermic reaction occurred at around 35...

Two-dimensional layered material of Ti3C2 has been used to improve the hydrogen desorption properties of LiBH4. The results of temperature-programmed dehydrogenation (TPD) and isotherm dehydrogenation (TD) demonstrate that adding the Ti3C2 contributes to the hydrogen storage performance of LiBH4...

A safe and cost effective material for hydrogen storage is indispensable for developing hydrogen fuel cell technology to reach its greater heights. The present work deals with hydrogen storage performance of lithium borohydride decorated activated hexagonal boron nitride (LiBH4@Ah-BN) nanocompos...

This paper reports the results of using various metal oxides and metal chlorides as additives to modify lithium borohydride for reversible hydrogen storage. Two approaches – element substitution and additive interaction – were attempted for reducing dehydriding temperatures and improving dehyd...

Reversibility is one of the key features for any hydrogen storage material. Borohydrides such as LiBH4 have been studied or proposed as candidates for hydrogen storage because of their high hydrogen contents (18.4 wt% for LiBH4). Limited success has been made in reducing the dehydrogenation temp...

We report first-principles density functional theory studies of native defects in lithium borohydride (LiBH4), a potential material for hydrogen storage. Based on our detailed analysis of the structure, energetics, and migration of lithium-, boron-, and hydrogen-related defects, we propose a spe...

The x LiBH4-Li3N (x = 1, 2, 4) composites were investigated on their lithium ionic conductivities. They maintained the original phase structures of orthorhombic LiBH4 and hexagonal β-Li3N during ball milling according to the analyses by X-ray diffraction (XRD) and Fourier transform infrared spe...

Lithium borohydride, one of the highest energy density chemical energy carriers, is considered as an attractive potential hydrogen storage material due to its high gravimetric hydrogen density (19.6%). Belonging to borohydride compounds, it presents a real issue to overcome aims fixed by the U.S...

SummaryLithium borohydride ammoniates can be readily generated by LiBH4 absorbing ammonia at room temperature. Li(NH3)nBH4 (0

The effect of several interleukin-1β converting enzyme (ICE) inhibitors on apoptosis was examined. The ICE inhibitors tested were peptide aldehydes such as ethyloxycarbonyl-Ala-Tyr-Val-Ala-Asp-aldehyde (Etoco-AYVAD-CHO), acetyl-Tyr-Val-Ala-Asp-aldehyde (Ac-YVAD-CHO), benzyloxycarbonyl-Val-His-A...

A novel derivatization reagent, (S)-1-(1-methylpyridin-2-yl)-3-aminopiperidine (MPAPp), was designed and developed for the enantiomeric separation by conventional reversed-phase liquid chromatography (LC) and the sensitive electrospray ionization-tandem mass spectrometry (ESI-MS/MS) detection of...

Cyclisations of homoallylic sulfonamides proceed smoothly via carbenium ion generation using trifluoromethanesulfonic (triflic) acid, the ease of cyclisation being directly related to the ion stability to give good to excellent yields of the corresponding pyrrolidines. Both toluene- and nitrophe...

Enantioselective Diels-Alder reaction was conducted successfully using a chiral magnesium complex prepared from Grignard reagent and a chiral 2-(2-p-toluenesulfonylamino)phenyl-4-phenyloxazoline derived from easily available D-phenylglycine as a chiral auxiliary. The endo-isomer was exclusively ...

The stereoselective addition of enantiomerically pure (as shown by 200 MHz 1H NMR study) dipeptide Boc-Cys-Ala-OMe 4 to α-methylene-γ-butyrolactones has been studied. The stereoselectivity of the addition parallels the enantioselectivity observed in the allergic contact dermatitis induced in g...

Three new glucosyloxybenzyl derivatives of (R)-2-benzylmalic acid and of (R)-eucomic acid, grammatophyllosides A–C, and a new phenolic glucoside, grammatophylloside D, were isolated from the pseudobulbs of Grammatophyllum speciosum along with cronupapine, vandateroside II, gastodin, vanillolosi...

The solution conformation of the title compound, based on one and two dimensional NMR techniques in CDCl3 and (CD3)2SO at 500 MHz, has been deduced as a 310 helix initiated by an electrostatically locked type II' reverse turn.

The tetrapeptide Boc-L-Glu-Ala-Leu-LysNHMe (1) reveals a random coil conformation, based on its Glu(γ) and Lys(ɛ) methylene proton aniosotropic shift, GluNH chemical shift, NOEs in chloroform-DMSO (6:1), and its amide proton temperature coefficients in DMSO, while on similar considerations, the...