Stilbene and uptransition rare earth nanocomposite, preparation method and application thereof

The invention discloses a stilbene and uptransition rare earth nanocomposite, a preparation method and an application thereof. The method comprises adding a rare earth salt solution into a disperse system 1, adding an aqueous solution containing 1-3 % of sodium fluoride or ammonium fluoride with stirring, transferring to a high-pressure reaction vessel, heating to 150-300 DEG C under protection of argon or nitrogen, insulating for 3-8 hours, centrifuging to collect deposition, alternatively cleaning with ethanol and water, drying under vacuum to form nano-particles; dispersing a toluene or chloroform solution containing 0.1-1 % of the nano-particles into a disperse system 2 containing the stilbene compound, introducing argon or nitrogen with stirring, reacting for 3-8 hours under a room temperature, adding ethanol to deposit, and drying the deposition under vacuum to obtain the nanocomposite. The stilbene and uptransition rare earth nanocomposite can be excited under near infrared, is deep in organization pen