TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I) comprises (i) synthesizing 9,10-bis(4-methylphenyl)anthracene; (ii) synthesizing 9,10-bis(4-(bromomethyl)phenyl)anthracene; (iii) synthesizing 9,10-bis(4-azidomethylphenyl)anthracene; (iv) synthesizing 9,10-bis(4-(aminomethyl)phenyl)anthracene; (v) synthesizing 9,10-bis(4-((3-(6-(heptan-3-yl)-1H-pyrimidin-4-on-2-yl)ureido)methyl)phenyl)anthracene; and (vi) assembling (VI) into supramolecular structure of fluorescent nanoparticles. Preferred Method: The synthesis of 9,10-bis(4-methylphenyl)anthracene comprises adding 9,10-dibromoanthracene and 4-methyl boronic acid into mixed solvent of ethanol and toluene, adding tetrakis(triphenylphosphine)palladium(0) and aqueous sodium carbonate solution, reacting under reflux condition under nitrogen atmosphere, vacuum removing the solvent, extracting with dichloromethane and water, combining organic phase, vacuum removing the solvent to dryness and performing column chromatography. The synthesis of 9,10-bis(4-(bromomethyl)phenyl)anthracene comprises dissolving 9,10-bis(4-methylphenyl)anthracene in carbon tetrachloride, adding N-bromosuccinimide and small amount of benzoyl peroxide as initiator, refluxing under nitrogen atmosphere, filtering and vacuum evaporating the filtrate. The synthesis of 9,10-bis(4-azidomethylphenyl)anthracene comprises dissolving sodium azide in N,N-dimethylformamide, adding 9,10-bis(4-(bromomethyl)phenyl)anthracene, reacting under suitable conditions, quenching the reaction, extracting reaction liquid with dichloromethane, combining organic phase, drying, filtering, performing column chromatography and vacuum drying the obtained product. The synthesis of 9,10-bis(4-(aminomethyl)phenyl)anthracene comprises adding 9,10-bis(4-azidomethylphenyl)anthracene into anhydrius tetrahydrofuran, adding lithium aluminum hydride, refluxing to react, quenching reaction, filtering, extracting with water and dichloromethane. The synthesis of 9,10-bis(4-((3-(6-(heptan-3-yl)-1H-pyrimidin-4-on-2-yl)ureido)methyl)phenyl)anthracene comprises synthesizing quadruple hydrogen bonding precursor 6-(heptan-3-yl)-2-ureido-1H-pyrimidin-4-one, adding 6-(heptan-3-yl)-2-ureido-1H-pyrimidin-4-one and 9,10-bis(4-(aminomethyl)phenyl)anthracene into dichloromethane, stirring at room temperature, vacuum evaporating and performing column chromatography. The step (vi) comprises dissolving 9,10-bis(4-((3-(6-(heptan-3-yl)-1H-pyrimidin-4-on-2-yl)ureido)methyl)phenyl)anthracene in chloroform, adding the obtained solution into water containing surfactant, evenly dispersing under ultrasound for 30 minutes to obtain microemulsion, centrifuging, redispersing the solid obtained in distilled water, centrifuging repeatedly, washing 3 times fluorescent nanoparticles, where the surfactant is cetyltrimethylammonium bromide, sodium dodecyl sulfate or 4-(dodecyloxy)phenyltripropargylammonium bromide. Preferred components: The energy acceptor is 9-(4-methoxyphenylethynyl)-10-(4-((3-(6-(heptan-3-yl)-1H-pyrimidin-4-on-2-yl)ureido)methyl)phenylethynyl)anthracene. Preferred Method: The energy acceptor is prepared by Sonogashira reaction of 9,10-dibromoanthracene, p-methoxyphenylacetylene, p-aminophenylacetylene and 6-(heptan-3-yl)-2-ureido-1H-pyrimidin-4-one.