Nano-aggregates of furan-2-carbohydrazide derivatives displaying enhanced emission with a bathochromic shift.

The non-fluorescent Schiff base compound C1 ('-((4'-ethyl-3-hydroxy-[1,1'-biphenyl]-4-yl)methylene)furan-2-carbohydrazide) in organic solvent (, THF) was found to produce yellow-green fluorescence emission upon addition of HO, and granular-shaped aggregates in a THF/HO mixed solution formed and exhibited obvious aggregation-induced emission (AIE). Especially its keto fluorescence band intensified dramatically, while the enol emission band remained almost unchanged. Hence, a change in fluorescence from no emission of light to emission of bright yellow-green light under a UV lamp was observed with the naked eye.

Effect of heat treatment under vacuum on structure and visible-light photocatalytic activity of nano-TiO.

Nano-TiO is known as a photocatalyst with high catalytic activity. However, it should be emphasized that the bandgap of nano-TiO is wide, which limits its photocatalytic efficiency in response to visible light and thus hinders its potential application. Improving the photocatalytic activity of nano-TiO under visible light by the strategy of heat treatment under vacuum was investigated in this study.