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Article: Further time-resolved spectroscopic investigations on the intramolecular charge transfer state of 4-dimethylaminobenzonitrile (DMABN) and its derivatives, 4-diethylaminobenzonitrile (DEABN) and 4-dimethylamino-3,5-dimethylbenzonitrile (TMABN)

TitleFurther time-resolved spectroscopic investigations on the intramolecular charge transfer state of 4-dimethylaminobenzonitrile (DMABN) and its derivatives, 4-diethylaminobenzonitrile (DEABN) and 4-dimethylamino-3,5-dimethylbenzonitrile (TMABN)
Authors
Issue Date2003
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/pccp
Citation
Physical Chemistry Chemical Physics, 2003, v. 5 n. 6, p. 1043-1050 How to Cite?
AbstractA wide range of time-resolved spectroscopic methods (time-resolved infrared (TRIR), picosecond Kerr gated time-resolved resonance Raman (ps-K-TR 3) and transient absorption (TA)) have been utilized to investigate the charge transfer reaction of photoexcited 4-dimethylaminobenzonitrile (DMABN), 4-diethylaminobenzonitrile (DEABN) and 4-dimethylamino-3,5-dimethylbenzonitrile (TMABN) in polar aprotic solvents. By monitoring directly the temporal changes of the ICT state TRIR C≡N band, the charge transfer rate for each compound has been measured. The ICT reaction is fastest for TMABN, with the ICT state forming promptly after electronic excitation and DEABN is found to be faster than DMABN. The ps-K-TR 3 spectra of the ICT state show similar resonance enhancement patterns and spectra are dominated by phenyl ring related modes for all three molecules when using a 400 nm probe wavelength. Frequencies of the TRIR C≡N band and the main ps-K-TR 3 mode resemble their counterparts in the benzonitrile radical anion. Close analogy has also been found between the ICT state absorption spectra of the three molecules, being again similar to the absorption spectrum of the benzonitrile radical anion. The results are consistent with the electronically decoupled TICT model.
Persistent Identifierhttp://hdl.handle.net/10722/167784
ISSN
2015 Impact Factor: 4.449
2015 SCImago Journal Rankings: 1.836
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorKwok, WMen_US
dc.contributor.authorMa, Cen_US
dc.contributor.authorGeorge, MWen_US
dc.contributor.authorGrills, DCen_US
dc.contributor.authorMatousek, Pen_US
dc.contributor.authorParker, AWen_US
dc.contributor.authorPhillips, Den_US
dc.contributor.authorToner, WTen_US
dc.contributor.authorTowrie, Men_US
dc.date.accessioned2012-10-08T03:11:32Z-
dc.date.available2012-10-08T03:11:32Z-
dc.date.issued2003en_US
dc.identifier.citationPhysical Chemistry Chemical Physics, 2003, v. 5 n. 6, p. 1043-1050en_US
dc.identifier.issn1463-9076en_US
dc.identifier.urihttp://hdl.handle.net/10722/167784-
dc.description.abstractA wide range of time-resolved spectroscopic methods (time-resolved infrared (TRIR), picosecond Kerr gated time-resolved resonance Raman (ps-K-TR 3) and transient absorption (TA)) have been utilized to investigate the charge transfer reaction of photoexcited 4-dimethylaminobenzonitrile (DMABN), 4-diethylaminobenzonitrile (DEABN) and 4-dimethylamino-3,5-dimethylbenzonitrile (TMABN) in polar aprotic solvents. By monitoring directly the temporal changes of the ICT state TRIR C≡N band, the charge transfer rate for each compound has been measured. The ICT reaction is fastest for TMABN, with the ICT state forming promptly after electronic excitation and DEABN is found to be faster than DMABN. The ps-K-TR 3 spectra of the ICT state show similar resonance enhancement patterns and spectra are dominated by phenyl ring related modes for all three molecules when using a 400 nm probe wavelength. Frequencies of the TRIR C≡N band and the main ps-K-TR 3 mode resemble their counterparts in the benzonitrile radical anion. Close analogy has also been found between the ICT state absorption spectra of the three molecules, being again similar to the absorption spectrum of the benzonitrile radical anion. The results are consistent with the electronically decoupled TICT model.en_US
dc.languageengen_US
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/pccpen_US
dc.relation.ispartofPhysical Chemistry Chemical Physicsen_US
dc.titleFurther time-resolved spectroscopic investigations on the intramolecular charge transfer state of 4-dimethylaminobenzonitrile (DMABN) and its derivatives, 4-diethylaminobenzonitrile (DEABN) and 4-dimethylamino-3,5-dimethylbenzonitrile (TMABN)en_US
dc.typeArticleen_US
dc.identifier.emailMa, C:macs@hkucc.hku.hken_US
dc.identifier.authorityMa, C=rp00758en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1039/b209621hen_US
dc.identifier.scopuseid_2-s2.0-0037444411en_US
dc.identifier.hkuros92403-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037444411&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume5en_US
dc.identifier.issue6en_US
dc.identifier.spage1043en_US
dc.identifier.epage1050en_US
dc.identifier.isiWOS:000181288700010-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridKwok, WM=7103129332en_US
dc.identifier.scopusauthoridMa, C=7402924979en_US
dc.identifier.scopusauthoridGeorge, MW=26325262600en_US
dc.identifier.scopusauthoridGrills, DC=6601986706en_US
dc.identifier.scopusauthoridMatousek, P=7005659005en_US
dc.identifier.scopusauthoridParker, AW=7403267977en_US
dc.identifier.scopusauthoridPhillips, D=22998496000en_US
dc.identifier.scopusauthoridToner, WT=6701364578en_US
dc.identifier.scopusauthoridTowrie, M=7004415080en_US

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