Enhancing the emission of hexa-peri-hexabenzocoronene-containing polynorbornene via electron donating, unsymmetric constitution and solvent effects. Issue 21 (9th May 2017)

• Record Type: Journal Article
• Authors: Tsai, Chou-Yi; Zhang, Qiang; Wang, Yi-Ze; Shyong, Jocelyn; Chen, Hsin-Lung; Liaw, Der-Jang
• Is Part Of: Polymer chemistry. Volume 8:Issue 21(2017)
• Page Start: 3327
• Page End: 3332
• Publication Date: 2017-05-09
• Subjects: Polymers -- Periodicals; Macromolecules -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1039/c7py00359e
• Languages: English
• ISSNs: 1759-9954

Abstract

Abstract : Hexa- peri -hexabenzocoronene-containing hydrogenated polynorbornene dispersion showed an intensive emission of the 0–0 transition (465 nm) and excellent dispersibility. Abstract : The organo-soluble and extremely stable polynorbornenePHNB-HPB with a hexaphenylbenzene (HPB) moiety was prepared by ring-opening metathesis polymerization (ROMP) followed by hydrogenation. The hexa- peri -hexabenzocoronene (HBC)-containingPHNB-HBC, which is insoluble in commercial organic solvents, was prepared by the cyclodehydrogenation ofPHNB-HPB . The glass transition temperature ofPHNB-HPB was 205 °C. The temperatures required for a 10% weight loss ( T d10 ) forPHNB-HPB andPHNB-HBC were 428 °C and 456 °C under a nitrogen flow, respectively. ThePHNB-HBC exhibited an ordered self-assembly in the solid state. The exfoliation ofPHNB-HBC aggregates was tested by ultrasonication in various solvents. ThePHNB-HBC dispersion solutions showed an intensive emission of the 0–0 transition (465 nm) due to the lower D 6h symmetrical structure and alkoxy substituents. Between different solvents, the dispersion in N -cyclohexyl-2-pyrrolidone (CHP) showed the highest individual metric and the strongest 0–0 transition (465 nm), indicating higher dispersibility.