ORCID Profile
0000-0003-0625-2391
Current Organisation
Hong Kong University of Science and Technology
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Publisher: American Chemical Society (ACS)
Date: 22-04-2005
DOI: 10.1021/JP0503462
Abstract: We synthesized a group of silole regioisomers 1(x,y), whose photoluminescence varied dramatically with its regiostructure. By internally hindering the intramolecular rotation, we succeeded in creating a novel silole (1(3,4)) that is strongly luminescent in solutions and whose fluorescence quantum yield in acetone is as high as 83%. We revealed that 1(3,4) was a sensitive chemosensor capable of optically discriminating nitroaromatic regioisomers of p-, o-, and m-nitroanilines. Against general belief, crystal formation of 1(2,4) blue-shifted its emission color and boosted its emission efficiency. The light-emitting diode based on the crystal of 1(2,4) emitted a strong blue light (464 nm) in a high current efficiency (5.86 cd/A).
Publisher: Springer Science and Business Media LLC
Date: 08-2014
Publisher: Elsevier BV
Date: 2010
Publisher: Wiley
Date: 22-09-2010
DOI: 10.1002/PEN.21790
Publisher: Springer Science and Business Media LLC
Date: 09-02-2010
Publisher: Springer Science and Business Media LLC
Date: 23-03-2010
Publisher: Wiley
Date: 03-02-2010
DOI: 10.1002/POLB.21942
Publisher: Springer Science and Business Media LLC
Date: 14-05-2010
Publisher: Springer Science and Business Media LLC
Date: 23-04-2010
Publisher: Wiley
Date: 16-07-2010
DOI: 10.1002/PEN.21663
Publisher: Walter de Gruyter GmbH
Date: 12-2012
DOI: 10.1515/EPOLY.2012.12.1.84
Abstract: Thermotropic liquid crystalline polymer (TLCP) nanocomposites with different organoclay contents were prepared by a method combining ultrasonication, centrifugation and solution casting methods. The effects of organoclay concentration on morphology, liquid crystallinity and thermal properties of nanocomposites were characterized. Molecular level interactions existed in nanocomposites. With a small amount of organoclay (nominal 3.0 wt %), it was enough to change TLCP properties with enhanced thermal stability though with a small negative effect on liquid crystallinity. When high concentration organoclay was added, thermal stability decreased and liquid crystallinity lost with shearinduced phase separation occurrence.
Publisher: Springer Science and Business Media LLC
Date: 11-03-2010
Publisher: InTech
Date: 07-11-2012
DOI: 10.5772/45996
Publisher: Informa UK Limited
Date: 10-09-2010
Publisher: Springer Science and Business Media LLC
Date: 02-2007
Publisher: American Chemical Society (ACS)
Date: 21-09-2007
DOI: 10.1021/MA071062D
Publisher: American Chemical Society (ACS)
Date: 16-07-2008
DOI: 10.1021/JP800296T
Abstract: Whereas chain aggregation commonly quenches light emission of conjugated polymers, we here report a phenomenon of aggregation-induced emission enhancement (AIEE): luminescence of polyacetylenes is dramatically boosted by aggregate formation. Upon photoexcitation, poly(1-phenyl-1-alkyne)s and poly(diphenylacetylene)s emit blue and green lights, respectively, in dilute THF solutions. The polymers become more emissive when their chains are induced to aggregate by adding water into their THF solutions. The polymer emissions are also enhanced by increasing concentration and decreasing temperature. Lifetime measurements reveal that the excited species of the polymers become longer-lived in the aggregates. Conformational simulations suggest that the polymer chains contain n=3 repeat units that facilitate the formation of intramolecular excimers. The AIEE effects of the polymers are rationalized to be caused by the restrictions of their intramolecular rotations by the aggregate formation.
No related grants have been discovered for Ping Gao.