A novel (CdS-Mn/MoS/CdTe)-sensitized TiO nanotube arrays (NTAs) photoelectrode has been prepared by electrodeposite, successive ionic layer adsorption and reaction (SILAR) coupled with hydrothermal method. When a ZnS layer was added on the top of CdS-Mn/MoS/CdTe/TiO, a notable red-shift and high absorption was observed in the visible light region. The photocurrent density (mA/cm) systematically increases from TiO NTAs (0.43), CdTe/TiO (1.09), MoS/CdTe/TiO (1.80), CdS-Mn/MoS/CdTe/TiO (2.40), to ZnS/CdS-Mn/MoS/CdTe/TiO (3.41) under visible light irradiation, due to the type-II semiconductor heterostructures comprising multiple components with a staggered band offset. Such a heterostructure possesses an enhanced photocatalytic performance towards degradation of organic contaminant, e.g. P-Nitrophenol (PNP) and Rhodamine B (RhB).
Herein, we develop a mild method
for N-acylation
of primary and secondary amines with α-diketones induced by
ultraviolet (UV) light. Forty-six examples with various functional
groups are explored at room temperature with irradiation by three
26 W UV lamps (350–380 nm). The yield reaches 97%. The gram
scale experiment product yield is 76%. Moreover, this system can be
applied to the synthesis of several amino acid derivatives. Mechanistic
studies show that benzoin is generated in situ from
benzil under UV irradiation.
A novel method to synthesize N-aryl-1-amino indoles
was established by the photoinduced N–N coupling reaction.
This protocol is by treatment of o-nitrobenzyl alcohols
and indolines in the presence of TEAI and acetic acid with a 24 W
ultraviolet (UV) light-emitting diode (LED) (385–405 nm) irradiation.
The products bearing an aldehyde group can be further transformed
to fluorescent probes based on Rhodamine 6G derivative 11, which shows a high specificity and sensitivity for Fe3+.
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