title: Photopolymerization of diacetylene-capped gold nanoparticles.
abstract: Gold nanoparticles (AuNPs) coated with the diacetylene henicosa-10,12-diyn-1-yl (DS9) disulfide were successfully prepared by direct synthesis in toluene solutions. The average size of the nanohybrid metal core was finely adjusted by manipulation of the preparative conditions in the diameter range from 1.6 to 7.5 nm, as determined by TEM characterization. The topochemical polymerization of DS9 chemisorbed onto the gold nanoclusters of different size was carried out in colloidal suspensions by exposure to UV radiation and the process was monitored by UV-Vis and Raman spectroscopies. The results showed that in these assemblies the monomer undergoes an intra-particle polymerization and that the dominant polydiacetylene phase present is ruled by the core size. The deposition of the photoirradiated colloids onto different substrates was found to leave the polydiacetylene conjugation unaltered.
authors.affiliation: INSTM and Dipartimento di Chimica e Chimica Industriale, Università di Genova, Via Dodecaneso 31, 16146, Genova, Italy.
authors.forename: Marina
authors.initials: M
authors.lastname: Alloisio
authors.forename: Anna
authors.initials: A
authors.lastname: Demartini
authors.forename: Carla
authors.initials: C
authors.lastname: Cuniberti
authors.forename: Maurizio
authors.initials: M
authors.lastname: Muniz-Miranda
authors.forename: Emilia
authors.initials: E
authors.lastname: Giorgetti
authors.forename: Anna
authors.initials: A
authors.lastname: Giusti
authors.forename: Giovanna
authors.initials: G
authors.lastname: Dellepiane