title: Synthesis, fluorescence properties and applications of two novel oxadiazole-based stilbene optical brighteners as UV protectants for insect baculovirus.
abstract: Two novel symmetrical stilbene optical brighteners based on 1,3,4-oxadiazole bearing sodium sulfonate unit were synthesized. The two target compounds were characterized by NMR and elemental analysis. The photophysical processes of the target compounds were investigated by UV-Vis absorption and fluorescence emission spectra in different solutions. The two optical brighteners were tested as radiation protectants for the Spodoptera litura nuclear polyhedrosis virus (SINPV) against 2nd-instar S. litura larvae. The results indicate that the two compounds exhibit strong blue fluorescence emission, and the fluorescence quantum yield in DMF is 0.86 and 0.75, respectively. The insecticidal effect of SINPV is increased by the addition of the two compounds and especially the compound 3b shows more obvious synergy effect.
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, PR China.
authors.forename: Yong-Chuang
authors.initials: YC
authors.lastname: Zhu
authors.forename: Hui-Xiong
authors.initials: HX
authors.lastname: Lu
authors.forename: Dao-Hang
authors.initials: DH
authors.lastname: He
authors.forename: Zhuo-Ru
authors.initials: ZR
authors.lastname: Yang
mesh_terms: D000818:Animals; D005453:Fluorescence; D017924:Nucleopolyhedroviruses / Q000187:drug effects / Q000472:pathogenicity; D055620:Optical Phenomena; D010069:Oxadiazoles / Q000737:chemistry* / Q000494:pharmacology; D010572:Pest Control, Biological; D011837:Radiation-Protective Agents / Q000737:chemistry* / Q000494:pharmacology; D018411:Spodoptera / Q000821:virology; D013267:Stilbenes / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D010069:Oxadiazoles; D011837:Radiation-Protective Agents; D013267:Stilbenes
keywords: 1,3,4-Oxadiazole; Fluorescence properties; Stilbene optical brighteners; Synergy effect; Synthesis