PDF《江致勤电子转移的激光闪光光解研究》

2 ] Saito I . , Takayam a M. , Sugiyam a H. et al. . J. Am. Chem. Soc . [J ], 1995, 117: 6406―6407 [

3 ] A rm itage B. . Chem. Rev. [J ], 1998, 98: 1171―1200 [

4 ] WU Shu2Ping (吴树屏) , J I AN G Zhi2 Q in (江致勤) , YE J ian2Ping (叶建平). Chem. J. Chinese U niversities(高等学校化学学报) [J ], 1996, 17(4): 562―565 [

5 ] Rogers J. E. , Kelly E. A. . J. Am. Chem. Soc . [J ], 1999, 121: 3854―3861 [

6 ] Saito I . , Takayam aM. , Suyiyam a H. et al. . J. Am. Chem. Soc . [J ], 1995, 117: 5590―5591 [

7 ] A veline B. M. , M atsugo S. , Redmond R. W. . J. Am. Chem. Soc . [J ], 1997, 119: 11785―11795 [

8 ] John H. B. , Earl E. P. . Glycine[J ], 1943, 65: 761―762 [

9 ] W intgens V. , V alat P. , Kossanyi J. et al . . J. Chem. Soc . , Faraday T rans . [J ], 1994, 90: 411―421 [10] Dem eter A. , Biczó k L. , Bé rces T. et al . . J. Phys . Chem. [J ], 1993, 97: 3217―3224 [11] Lomoth R. , Brede O. , Chem. Phys . L ett. [J ], 1998, 288: 47―51 [12] Gschw ind R. , Haselbach E. . Helv. Chi m. A cta. [J ], 1979, 62: 941―955 Electron Transfer Laser Flash Photolysis Between Nucleosides and Probe Triplet N - (2'

-Hydroxyethyl) -1, 8-naphthal i m ide L I Hui2 Q ing

1 , J I AN G Zhi2 Q in

13 , W ang Xin

1 , PAN Yang

2 , WAN G Feng

2 , YU Shu2 Q in

2 (1. D epartm ent of Chem istry , T ong j i U niversity , S hanghai 200092, China;

2. D epartm ent of P hy sical Chem istry , U niversity of S cience and T echnology of China, H ef ei 230026, China) Abstract The ti m e resolved transient absorp tion p roperty, kinetics and m echanism of electron transfer (ET ) p rocess of the fluorescence p robe, N 2(2'

2hydroxyethyl) 21, 82naphthali m ide (N P I) w ere studied. The transient absorp tion spectra of N P I in H2O

2 CH3CN solution w ere successfully detected upon pulsed ex2 citation at

355 nm.

3 N P Iw as p roved as the p ri m ary excited state w ith lifeti m e of

147 Λs .

3 N P I underw ent the T2T energy transfer w ith Β2carotene and ET w ith triphenyl am ine to p roduce N P I - ・ . In the absence of quenchers, the self2quenching of

3 N P I by the ground states of N P I took p lace via ET. The ET from nu2 cleosides to

3 N P Iw as also exp lored. N P I show ed a strong electron2accep ting capability and the absorbance of

3 N P Iw as strongly quenched by the nucleosides . The form ation of N P I - ・ w as facilitated to a great ex2 tent si m ultaneously. The bi molecular quenching rate constants of N P I by GUA and DGUA w ere deter2 m ined as k3 = 8. 8*106 mol -

1 ・L ・s -

1 , k4 = 2. 1*107 mol・L ・s -

1 . The ET betw een N P I and nucleo2 sides w as verified and the m echanism w as p roposed. Keywords N aphthali m ide;

N ucleoside;

2'

2 D ioxyguanosine;

Electron transfer;

L aser flash photolysis (Ed. : S, X)

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