The photoinduced cleavage of coumarin dimers studied with femtosecond and nanosecond two-photon excitation

被引：15

作者：

Buckup, T. ^{[1
]}

Dorn, J. ^{[1
]}

Hauer, J. ^{[1
]}

Haertner, S. ^{[1
]}

Hampp, N. ^{[1
]}

Motzkus, M. ^{[1
]}

机构：

[1] Univ Marburg, FB Chem, D-35032 Marburg, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2007年 / 439卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2007.03.076

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The photocleavage of a coumarin derivative dimer is a promising mechanism for laser controlled drug release in medical applications. We studied the efficiency of such reaction after two-photon excitation, comparing femtosecond and nanosecond pulses in the range from 400 to 800 nm. The photocleavage reaction is remarkably more efficient for shorter wavelengths. The spectral profile of the two-photon absorption (TPA) spectrum resembles the single-photon absorption (SPA) spectrum. It was also observed that the photocleavage reaction triggered with femtosecond pulses is about 4.9 x 10(4) times more efficient than the reaction with nanosecond pulses at the same wavelength and beam area. (C) 2007 Elsevier B.V. All rights reserved.

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页码：308 / 312

页数：5

相关论文

共 20 条

[1] Design of organic molecules with large two-photon absorption cross sections [J].

Albota, M ;

Beljonne, D ;

Brédas, JL ;

Ehrlich, JE ;

Fu, JY ;

Heikal, AA ;

Hess, SE ;

Kogej, T ;

Levin, MD ;

Marder, SR ;

McCord-Maughon, D ;

Perry, JW ;

Röckel, H ;

Rumi, M ;

Subramaniam, C ;

Webb, WW ;

Wu, XL ;

Xu, C .

SCIENCE, 1998, 281 (5383) :1653-1656

[2] A new blue light-emitting oligofluorene glass: synthesis, characterization and photophysical properties [J].

Belfield, KD ;

Bondar, MV ;

Morales, AR ;

Yavuz, O ;

Przhonska, OV .

JOURNAL OF PHYSICAL ORGANIC CHEMISTRY, 2003, 16 (03) :194-201

[3]

Chen Y, 1997, J POLYM SCI POL CHEM, V35, P2999

[4] Cooperative enhancement of two-photon absorption in multi-branched structures [J].

Chung, SJ ;

Kim, KS ;

Lin, TH ;

He, GS ;

Swiatkiewicz, J ;

Prasad, PN .

JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (49) :10741-10745

[5] Two-photon properties and excitation dynamics of poly(p-phenylenevinylene) derivatives carrying phenylanthracene and branched alkoxy pendents [J].

Chung, SJ ;

Maciel, GS ;

Pudavar, HE ;

Lin, TC ;

He, GS ;

Swiatkiewicz, J ;

Prasad, PN ;

Lee, DW ;

Jin, JI .

JOURNAL OF PHYSICAL CHEMISTRY A, 2002, 106 (33) :7512-7520

[6] Hydrogen bonding properties of Coumarin 151, 500, and 35: The effect of substitution at the 7-amino position [J].

Das, K ;

Jain, B ;

Patel, HS .

JOURNAL OF PHYSICAL CHEMISTRY A, 2006, 110 (05) :1698-1704

[7] 2-PHOTON MOLECULAR-SPECTROSCOPY [J].

FRIEDRICH, DM .

JOURNAL OF CHEMICAL EDUCATION, 1982, 59 (06) :472-481

[8] SEARCH FOR EFFICIENT, NEAR UV LASING DYES .1. SUBSTITUENT EFFECTS ON BICYCLIC DYES [J].

HAMMOND, PR ;

FLETCHER, AN ;

HENRY, RA ;

ATKINS, RL .

APPLIED PHYSICS, 1975, 8 (04) :311-314

[9]

HARTNER S, IN PRESS J PHOTOCH A

[10] Two-photon-induced cycloreversion reaction of coumarin photodimers [J].

Kim, HC ;

Kreiling, S ;

Greiner, A ;

Hampp, N .

CHEMICAL PHYSICS LETTERS, 2003, 372 (5-6) :899-903