TY - JOUR
T1 - Revisiting the photophysics of 9-fluorenone
T2 - Ultrafast time-resolved fluorescence and theoretical studies
AU - Chang, Chih Wei
AU - Sølling, Theis I.
AU - Diau, Wei-Guang
PY - 2017/10/16
Y1 - 2017/10/16
N2 - Ultrafast intersystem crossing dynamics of fluorenone in gas and condensed phases were investigated by time-resolved mass spectrometry and fluorescence up-conversion spectroscopy. The former shows the ultrafast Franck-Condon relaxation and the internal conversion dynamics of isolated fluorenone in the gas phase. The latter reveals that the vibrational relaxation time is 2.2 ps and a 110 ps fluorescence lifetime of fluorenone in hexane. The fluorescence lifetime in acetonitrile and dimethylsulfoxide is 16 ns and 15.1 ns, respectively. The potential energy surface along the C[dbnd]O out of plane bending motion shows that this coordinate is important for ISC in both polar and non-polar solvents.
AB - Ultrafast intersystem crossing dynamics of fluorenone in gas and condensed phases were investigated by time-resolved mass spectrometry and fluorescence up-conversion spectroscopy. The former shows the ultrafast Franck-Condon relaxation and the internal conversion dynamics of isolated fluorenone in the gas phase. The latter reveals that the vibrational relaxation time is 2.2 ps and a 110 ps fluorescence lifetime of fluorenone in hexane. The fluorescence lifetime in acetonitrile and dimethylsulfoxide is 16 ns and 15.1 ns, respectively. The potential energy surface along the C[dbnd]O out of plane bending motion shows that this coordinate is important for ISC in both polar and non-polar solvents.
KW - Fluorenone
KW - Intersystem crossing
KW - Time-resolved fluorescence spectroscopy
KW - Time-resolved mass spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85026193901&partnerID=8YFLogxK
U2 - 10.1016/j.cplett.2017.07.039
DO - 10.1016/j.cplett.2017.07.039
M3 - Article
AN - SCOPUS:85026193901
VL - 686
SP - 218
EP - 222
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
ER -