摘要
Rapid and real-time mon itoring of food quality plays critical roles in the food industry and for the gen era I public health.Herei n,we specially synthesized a new perylene bisimide(PBI)derivative(PCB-EpE)composed of two PBI units and a rigid o-carborane linker,which was further employed in constructi ng a con ceptual fluoresce nt film sen sor for evaluati ng fish fresh ness.Photophysical studies indicate that PCB-EpE displays an open"Z-type"molecular configuration in chloroform and a closed"△-type"configuration in methyl cyclohexa ne.Comparatively,"Z-type"molecular configurati on possesses higher fluoresce nee qua ntum yield and is more sen sitive toward volatile basic nitrogen(VBN).
基金
We ack no wledge the fundi ng from the Nati onal Natural Science Foundation of China(21820102005),111 project(B14041)
the Fun dame ntal Research Funds for the Cen tral Un iversities(GK202001005 and GK202003034)
the Innovation Capability Support Program of Shaanxi(2021TD-18)
the Youth Innova-tion Team of Shaanxi Universities.
