Surface-enhanced Raman spectroscopy (SERS) is an ultrasensitive analytical technique with molecular specificity, making it an ideal candidate for therapeutic drug monitoring (TDM). However, in critical diagnostic media including blood, nonspecific protein adsorption coupled with weak surface affinities and small Raman activities of many analytes hinder the TDM application of SERS. Here we repor...

Polyester-based nanoparticles (NPs) are among the most adopted drug delivery systems developed so far. This is mainly due to their ability increase bioavailability of loaded therapeutics, prevent adverse effects often associated with use, and eliminate toxic excipients necessary formulate them. In addition, these NPs biodegradable under physiological conditions thus avoiding polymer accumulatio...

The adsorption of penicillamine (PCA) on pure B12N12 and B12CaN12 nanocages in aqueous chloroform solvents has been evaluated using density functional theory (DFT) calculations. interaction PCA is chemisorption through its four nucleophilic sites: amine, carbonyl, hydroxyl thiol. most stable configuration was achieved when zwitterionic adsorbs via carbonyl group water with value ?1.723 eV, cont...

The conjugation of zwitterionic phosphorylcholine onto gold nanorods leads to enhanced and selective uptake within cancer cells.

Synthesis of the Guanidium-Meldrum acid zwitterionic salts was developed through a three component reaction of 2, 2-dimethyl-1, 3-dioxane-4, 6-dione (Meldrum acid), aromatic aldehydes and N, N, N’, N’-Tetramethyl-guanidine in benzen at room temperature. These reaction conditions allow the preparation of stable zwitterionic salts in good yields. A dynamic NMR effect is observed as a result of re...

An ODS column dynamically coated with zwitterionic bile acid derivative, 3-[(3-cholamidopropyl)-dimethylammonio]-1-propanesulfonate (CHAPS), was evaluated for direct injection determination of drugs in blood serum by HPLC. Polar functional groups such as sulfonate, ammonium and the three hydroxyl groups in CHAPS protruding towards an aqueous mobile phase formed a hydrophilic layer over the ODS ...

The cycloaddition reaction of diphenylketene and cycloheptatriene is studied. The reaction proceeds via a highly asynchronous reaction path to the zwitterionic 6 as intermediate. Subsequent CC- bond formation yields 8, 8 diphenylbicyclo [4. 2. I] nona-2, 4-dien-7-one (1) and 7,7-diphenylbicycol [3.2.2] nona-2, 8-dien-ri-one (2) in a 1:1 ratio as formal [6+2] and [4+2] cycloaddition products

The synthesis and mechanistic study of the unprecedented reactivity of a series of zwitterionic η(1)-metal allenyls are reported.