TY - JOUR
T1 - The excited multiplet states of 5,10,15-tri-n-pentyl-20 (1′,1′,3′, 3′-tetramethylisoindolin -2′-yloxyl-5′-yl)porphyrinato zinc(II)
AU - Ishii, Kazuyuki
AU - Bottle, Steven E.
AU - Shimizu, Shinsuke
AU - Smith, Craig D.
AU - Kobayashi, Nagao
N1 - Funding Information:
This work was partially carried out in the Advanced Instrumental Laboratory for Graduate Research of the Department of Chemistry, Graduate School of Science, Tohoku University, and at the School of Physical and Chemical Sciences, QUT, Australia; supported by a Grant-in-Aid for Scientific Research No. 14703007 from the Ministry of Education, Culture, Sports, Science and Technology, Japan and an ARC Discovery Grant DP0211669.
PY - 2003/3/7
Y1 - 2003/3/7
N2 - Photo-physical properties of 5,10,15-tri-n-pentyl-20-(1′,1′,3′,3′- tetramethylisoindolin-2′-yloxyl-5′-yl)porphyrinato zinc(II), 1, have been investigated using time-resolved EPR (TREPR) and transient absorption measurements. A formation of the excited doublet (D 1 ) and quartet (Q 1 ) states constituted by excited triplet zinc porphyrin (ZnP) and doublet nitroxide is confirmed by TREPR. This is the first D 1 and Q 1 observation in a system where the nitroxide is directly substituted to a porphyrin ligand. Compound 1 exhibits the longest lifetime of any nitroxide-porphyrin systems in the lowest excited state, indicating a relatively weak electron exchange interaction between triplet ZnP and doublet nitroxide.
AB - Photo-physical properties of 5,10,15-tri-n-pentyl-20-(1′,1′,3′,3′- tetramethylisoindolin-2′-yloxyl-5′-yl)porphyrinato zinc(II), 1, have been investigated using time-resolved EPR (TREPR) and transient absorption measurements. A formation of the excited doublet (D 1 ) and quartet (Q 1 ) states constituted by excited triplet zinc porphyrin (ZnP) and doublet nitroxide is confirmed by TREPR. This is the first D 1 and Q 1 observation in a system where the nitroxide is directly substituted to a porphyrin ligand. Compound 1 exhibits the longest lifetime of any nitroxide-porphyrin systems in the lowest excited state, indicating a relatively weak electron exchange interaction between triplet ZnP and doublet nitroxide.
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U2 - 10.1016/S0009-2614(03)00112-X
DO - 10.1016/S0009-2614(03)00112-X
M3 - Article
AN - SCOPUS:0037424462
SN - 0009-2614
VL - 370
SP - 94
EP - 98
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-2
ER -