We have synthesised a novel copper(ii) complex with a pyridine pendant as a proton relay port for electrocatalytic 4e(-) reduction of O2 in water. The enhancement of the electrocatalytic O2 reduction via protonation of the pyridine pendant is demonstrated in comparison with a copper(ii) complex without the pyridine pendant.

Maleimide is a stable and easy-to-handle moiety that rapidly and covalently conjugates thiol groups of cysteine residues in proteins or peptides. Herein, we use maleimide to modify the surface of liposomes in order to obtain an advanced drug delivery system. Employing a small amount (0.3 mol%) of maleimide-polyethylene glycol (PEG) to modify the surface of the liposomes M-GGLG-liposomes, compos...

Hydrogels, highly hydrated cross-linked polymer networks, have emerged as powerful synthetic analogues of extracellular matrices for basic cell studies as well as promising biomaterials for regenerative medicine applications.[1] A critical advantage of these artificial matrices over natural networks is that bioactive functionalities, such as cell adhesive sequences and growth factors, can be in...

The title compound, C(21)H(23)ClN(2)O(2), was synthesized from N-amino-α-terpinene maleimide and 2-chloro-benzaldehyde. There are two independent mol-ecules in the asymmetric unit which are linked via an inter-molecular C-H⋯O hydrogen bond. The crystal studied was found to be a partial merohedral twin, with a 0.74 (7):0.26 (7) domain ratio.

Chemical vapor deposition polymerization was used to deposit a novel maleimide-functionalized poly-p-xylylene coating on various substrates. The coated substrates are readily able to undergo thiol-maleimide click reaction under mild conditions. Applications using this coating technology are highlighted in low-protein-fouling modification as well as manipulated attachments and growth of bovine a...

[2,5-Dimethylfuran]-protected maleimides were placed at both internal positions and the 3'-end of oligonucleotides making use of solid-phase synthesis procedures. A new phosphoramidite derivative and a new solid support incorporating the protected maleimide moiety were prepared for this purpose. In all cases maleimide deprotection (retro-Diels-Alder reaction) followed by reaction with thiol-con...

Introduction of a fluorescence chromaphore into bifunctional crosslinkers is designed to assign two different functions. Normal crosslinker properties together with a fluorescence signal for quantification. As an example of this type of fluorescent-labeled crosslinker, dansyl-labeled heterobifunctional crosslinker with an NHS ester and sulfhydryl group was synthesized. The application of the sy...

Cyclic peptides and peptoids were prepared using the thiol-ene Michael-type reaction. The linear precursors were provided with additional functional groups allowing for subsequent conjugation: an orthogonally protected thiol, a protected maleimide, or an alkyne. The functional group for conjugation was placed either within the cycle or in an external position. The click reactions employed for c...

The title compound, C(8)H(6)N(2)O(2)·2H(2)O, crystallized as a zwitterion with the carboxyl group deprotonated and the imidazole group protonated. The dihedral angle between the benzimidazole ring and the pendant -CO(2) group is 0.62 (2)°. In the crystal, mol-ecules are linked into a three-dimensional network by N-H⋯O and O-H⋯O hydrogen bonds.

was chemically bonded to poly-L-lysine and to bovine serum albumin (BSA) and showed a paramagnetic resonance spectrum that was sensitive to known structural changes in these molecules, such as those produced by changes in pH.2 This nitroxide-isocyanate is unfortunately not an ideal spin-labeling reagent since it is unstable and thus difficult to purify, and moreover the isocyanate group is rapi...