This invention relates to a method for preparing fluorescent chiral
helical nanoribbons via a
hydrothermal reaction of 4-APA. The method involves adding 4-aminophthalic acid (4-APA) to deionized water, ultrasonically mixing the mixture, transferring it to a hydrothermal reactor, raising the temperature to 110–160°C within half an hour, and allowing the
hydrothermal reaction to proceed for a certain time. Heating is then stopped, and the mixture is allowed to cool naturally to
room temperature.
Centrifugation separates the precipitate, which is the fluorescent chiral
helical nanoribbon. This invention uses 4-APA as a precursor to synthesize a meta-condensed 4-APA
dimer via a one-step
hydrothermal reaction. Testing has confirmed that this is a fluorescent chiral
helical nanoribbon, and the conditions for helical
structure formation and the stability of the product's
fluorescence properties are well-documented. The preparation method disclosed in this invention is simple to operate, low in cost, and
environmentally friendly. The product simultaneously exhibits
fluorescence and
chirality, showing broad application potential in optoelectronic displays, information
encryption, and other fields.