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Enhancing the emission of hexa-peri-hexabenzocoronene-containing polynorbornene via electron donating, unsymmetric constitution and solvent effects

Enhancing the emission of hexa-peri-hexabenzocoronene-containing polynorbornene via electron donating, unsymmetric constitution and solvent effects

Authors :
Jocelyn Shyong
Yi-Ze Wang
Der-Jang Liaw
Chou-Yi Tsai
Qiang Zhang
Hsin-Lung Chen
Source :
Polymer Chemistry. 8:3327-3332
Publication Year :
2017
Publisher :
Royal Society of Chemistry (RSC), 2017.

Abstract

The organo-soluble and extremely stable polynorbornene PHNB-HPB with a hexaphenylbenzene (HPB) moiety was prepared by ring-opening metathesis polymerization (ROMP) followed by hydrogenation. The hexa-peri-hexabenzocoronene (HBC)-containing PHNB-HBC, which is insoluble in commercial organic solvents, was prepared by the cyclodehydrogenation of PHNB-HPB. The glass transition temperature of PHNB-HPB was 205 °C. The temperatures required for a 10% weight loss (Td10) for PHNB-HPB and PHNB-HBC were 428 °C and 456 °C under a nitrogen flow, respectively. The PHNB-HBC exhibited an ordered self-assembly in the solid state. The exfoliation of PHNB-HBC aggregates was tested by ultrasonication in various solvents. The PHNB-HBC dispersion solutions showed an intensive emission of the 0–0 transition (465 nm) due to the lower D6h 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.

Details

ISSN :
17599962 and 17599954
Volume :
8
Database :
OpenAIRE
Journal :
Polymer Chemistry
Accession number :
edsair.doi...........dd34e1f709936ed5812404413a7bfde9
Full Text :
https://doi.org/10.1039/c7py00359e