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Conference Paper: Synthesis of block copolymer-carbon nanotube composites and study of photo-induced electron transfer processes
Title | Synthesis of block copolymer-carbon nanotube composites and study of photo-induced electron transfer processes |
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Authors | |
Issue Date | 2013 |
Publisher | American Chemical Society (ACS). |
Citation | The 245th National Meeting and Exposition of the American Chemical Society (ACS), New Orleans, LA., 7-11 April 2013. Abstract 28 How to Cite? |
Abstract | Homopolymer and block copolymers functionalized with pyrenylcarbazole moieties were synthesized by reverse-addition-fragmentation chain transfer polymerization (RAFT). The pyrenylcarbazole units exhibit strong p-p interaction with carbon nanotube (CNT) surface such that the polymers can function as dispersing agent for CNTs in various solvents. Terpyridine units were incorporated into another block, which was further converted to different photosensitizing ruthenium complexes. Ultrafast photophysical measurements were performed on the homopolymer. Upon attaching on CNT surface, significant change in the excited state properties of pyrenylcarbazole was observed. Femtosecond transient absorption spectroscopy measurements showed that the decay of the pyrenylcarbazole excited states was much faster compared to those of CNT-free polymer. This is attributed to a photo-induced electron transfer between the pyrenylcarbazole units and CNT. By coupling with different photosensitizing molecules, the resulting CNT composites are promising candidates for photo/chemical sensing applications. |
Description | Conference Theme: Chemistry of Energy & Food Division - PMSE: Division of Polymeric Materials Science and Engineering Session - Carbon Nanotube and Graphene Functionalization and Placement: abstract 28 |
Persistent Identifier | http://hdl.handle.net/10722/183895 |
DC Field | Value | Language |
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dc.contributor.author | Lo, KC | en_US |
dc.contributor.author | Yu, L | en_US |
dc.contributor.author | Phillips, DL | en_US |
dc.contributor.author | Chan, WK | en_US |
dc.date.accessioned | 2013-06-18T04:24:25Z | - |
dc.date.available | 2013-06-18T04:24:25Z | - |
dc.date.issued | 2013 | en_US |
dc.identifier.citation | The 245th National Meeting and Exposition of the American Chemical Society (ACS), New Orleans, LA., 7-11 April 2013. Abstract 28 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/183895 | - |
dc.description | Conference Theme: Chemistry of Energy & Food | - |
dc.description | Division - PMSE: Division of Polymeric Materials Science and Engineering | - |
dc.description | Session - Carbon Nanotube and Graphene Functionalization and Placement: abstract 28 | - |
dc.description.abstract | Homopolymer and block copolymers functionalized with pyrenylcarbazole moieties were synthesized by reverse-addition-fragmentation chain transfer polymerization (RAFT). The pyrenylcarbazole units exhibit strong p-p interaction with carbon nanotube (CNT) surface such that the polymers can function as dispersing agent for CNTs in various solvents. Terpyridine units were incorporated into another block, which was further converted to different photosensitizing ruthenium complexes. Ultrafast photophysical measurements were performed on the homopolymer. Upon attaching on CNT surface, significant change in the excited state properties of pyrenylcarbazole was observed. Femtosecond transient absorption spectroscopy measurements showed that the decay of the pyrenylcarbazole excited states was much faster compared to those of CNT-free polymer. This is attributed to a photo-induced electron transfer between the pyrenylcarbazole units and CNT. By coupling with different photosensitizing molecules, the resulting CNT composites are promising candidates for photo/chemical sensing applications. | - |
dc.language | eng | en_US |
dc.publisher | American Chemical Society (ACS). | - |
dc.relation.ispartof | 245th ACS National Meeting & Exposition 2013 | en_US |
dc.title | Synthesis of block copolymer-carbon nanotube composites and study of photo-induced electron transfer processes | en_US |
dc.type | Conference_Paper | en_US |
dc.identifier.email | Phillips, DL: phillips@hku.hk | en_US |
dc.identifier.email | Chan, WK: waichan@hku.hk | en_US |
dc.identifier.authority | Phillips, DL=rp00770 | en_US |
dc.identifier.authority | Chan, WK=rp00667 | en_US |
dc.description.nature | link_to_OA_fulltext | - |
dc.identifier.hkuros | 214555 | en_US |
dc.identifier.hkuros | 220077 | - |
dc.publisher.place | United States | - |
dc.customcontrol.immutable | sml 131122 | - |