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化学学报
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化学学报 ›› 1990, Vol. 48 ›› Issue (2): 174-179. 上一篇    下一篇

研究论文

疏水作用对光化学和光物理过程的影响IX. 长链分子的簇集对β-萘甲酸烷基酯和脂肪酸9-蒽甲醇酯间能量传递的增强作用

徐承柏;佟振合   

  1. 中国科学院感光化学研究所
  • 发布日期:1990-02-15

Hydrophobic effects n photochemical and photophysical processed: IX, enhancement of singlet-singlet energy transfer from alkyl 2-naphthoates to 9-anthracenemethyl n-alkanoates via aggregation

XU CHENGBAI;DONG ZHENHE   

  • Published:1990-02-15

PDF

615

被引次数

9

在二甲基亚砜-水(DMSO-H2O)混合溶剂中, 长链β-萘甲酸烷基酯(An)、长链脂肪酸9-蒽甲醇酯(En)和长链饱和烷烃(Cn)相互簇集形成共簇集体, An通过共振机制向En进行单重态能量传递, 在每个簇集体含近一个给体分子和一个受体分子的情况下, 能量传递效率高达50%,簇集体内能量抟递的速度比簇集体同的大一个数量级, An激基缔合物也可向En进行能量传递, 但效率很低, 由于形成激基缔合物的过程与能量传递过程相互竞争, 激基缔合物的形成降低了能量传递的效率。

关键词: 光化学, 脂肪酸, 羧酸酯, ＤＭＳＯ, 能量传递, 长链化合物, 蒽 P, 萘甲酸 P, 单重态

In DMSO-water (DMSO-H2O) solvent mixture long-chain hydrocarbons (譶), alkyl 2-naphthoates (An) and 9-anthracenemethyl alkanoates (En) associate into coaggregates. The single-singlet energy transfer from An to En occurs via dipole-dipole interaction in the coaggregates. Under the condition that each coaggregate contains 1 An and 1 En mols., the efficiency of energy transfer is as high as 50%. The rate of intraaggregate energy transfer is 1 order in magnitude higher than that of interaggregative energy transfer. Energy transfer from An excimer to En was also observed, but the efficiency is very low. As a result, excimer formation decreases the efficiency of energy transfer since it competes with the energy transfer from An monomer.

Key words: PHOTOCHEMISTRY, FATTY ACID, CARBOXYLIC ACID ESTER, DMSO, ENERGY TRANSFER, LONG CHAIN COMPOUND, ANTHRACENE P, NAPHTHALENECARBOXYLIC ACID P, SINGLET

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