Association Behavior of a Nitrilotriacetic-Acid-Modified Dye in a Poly(Vinyl Alcohol) Film Containing Ni(II)-Adsorbed Gold Nanoparticles

The association behavior of the dyes 5(6)‐carboxyfluorescein and nitrilotriacetic acid (NTA)‐modified 5(6)‐carboxyfluorescein (F‐NTA) in a poly(vinyl alcohol) (PVA) film and in a PVA film containing metal nanoparticles is investigated. Well‐dispersed gold nanoparticles (AuNps) and Ni(II)‐adsorbed AuNps are formed in the PVA film using in situ photochemical fabrication method. 5(6)‐carboxyfluorescein and F‐NTA are doped into the films. The F‐NTA forms an H‐aggregate in the PVA film containing Ni(II)‐adsorbed AuNps. It is suggested that the interaction between NTA and Ni(II) adsorbed on the AuNps promotes the formation of the H‐aggregate. Coming together: The association behavior of a nitrilotriacetic‐acid‐modified 5(6)‐carboxyfluorescein dye (F‐NTA) in a poly(vinyl alcohol) (PVA) film and in a PVA film containing metal nanoparticles (Nps) is investigated. F‐NTA forms an H‐aggregate in the PVA film that contains Ni(II)‐adsorbed AuNps (see picture; F‐NTA=green plates, Ni(II)=green circles).