Corannulene derivatives with low LUMO levels and dense convex-concave packing for n-channel organic field-effect transistors.

Electron-deficient corannulene derivatives incorporating cyano and imide groups into the corannulene core were synthesized, which showed low LUMO (lowest unoccupied molecular orbital) levels and dense convex-concave packing structures in single crystals. These two features help to realize the first n-channel organic field-effect transistors (OFETs) in air based on corannulene derivatives.

Molecularly imprinted photonic polymer based on β-cyclodextrin for amino acid sensing.

A novel molecularly imprinted photonic polymer (MIPP) using maleic anhydride modified β-cyclodextrin (β-CD) and acrylic acid as functional monomers has been presented for amino acid sensing. Reactive β-CD monomer carrying vinyl carboxylic acid functional groups was first synthesized. MIPP was fabricated by filling precursor solution into the interstitial spaces of polystyrene photonic crystal templates, followed by a thermal polymerization at 55 °C.

[Studies on the alkaloids from stem of Artabotrys hainanensis].

Objective: To investigate the alkaloids from the stem of Artabotrys hainanensis.

Method: Compounds in plant extracts were separated by silica gel and sephadex LH-20 column chromatography. Chemical structures were elucidated by chemical and spectral analyses including UV, 1H-NMR, 13C-NMR, ESIMS and ESI-MS-MS.

Molecular mechanism of granulocytic differentiation of human promyelocytic leukemia HL-60 cells induced by all-trans retinoic acid.

Aim: To elucidate the molecular mechanism of granulocytic differentiation of human promyelocytic leukemia HL-60 cells induced by all-trans-retinoic acid (ATRA).

Methods: Flow cytometry was used to determine the cell cycle changes of HL-60 cells upon ATRA treatment. Gene expression profiles of HL-60 cells induced by 1 mumol.