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Computer vision software is complex, involving many tens of thousands of lines of code. Coding mistakes are not uncommon. When the vision algorithms are run on controlled data which meet all the algorithm assumptions, the results are often statistically predictable. This renders it possible to statistically validate the computer vision software and its(More)
A series of bolaamphiphiles with 4-hydroxycinnamoyl head groups and different length of the alkyl spacers (n = 6-12) were designed to investigate their photochemistry in the organized films obtained from the air/water interface. It has been found that both the length and odd-even number of the spacers can finely tune the molecular packing as well as the(More)
Selective meta-arylation of O-β-naphthyl carbamate has been accomplished using Pd(OAc)2 as a catalyst precursor and K2S2O8 with AgOAc as the oxidant. A range of aryl boronic acids could be introduced in moderate to good yields. Mechanistic investigation shows that the carbamate substituent has a unique effect and the reaction undergoes an(More)
Porphyrin nanofiber patterning was generated by air/water interfacial assembly. The air/water interfacial aggregation behavior of two prophyrins, both of which contain two hydrophobic alkyl chains and two carboxylic acid substituent groups at different positions, was investigated using UV spectra, FT-IR spectra, and AFM measurements on the corresponding(More)
Chiral nanostructures, normally formed by chiral molecules, play an essential role in natural systems. The helical assemblies constructed by achiral molecular building blocks are still rare and their regulating mechanisms have not been well studied. An achiral cinnamoyl-terminated bolaamphiphile with three methylene unit spacers was found to self-assemble(More)
A series of cinnamoyl-terminated bolaamphiphiles were synthesized and their assemblies at the air/water interface were investigated. It was found that the assembly behaviour depended on the substituted groups on the cinnamoyl unit. The bolaamphiphile with 4-hydroxycinnamoyl head groups (HCDA) was found to assemble into a supramolecular nanotube, while the(More)
An unprecedented approach for the synthesis of imine derivatives was achieved via a Pd(II)-catalyzed dearomatization reaction of N-aryl ureas with internal alkynes. The corresponding spirocyclic imine derivatives were obtained with 20 examples in good to excellent yields. Mechanistic investigation indicated that an interesting 1,3-palladium migration(More)
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