疏水作用对光化学和光物理过程的影响 ⅩⅢ.△5雄甾-3β-(1-萘乙酰)-17-丹酰酯在不良溶剂中的簇集和分子间能量传递

doi:10.7517/j.issn.1674-0475.1991.03.172

影像科学与光化学 ›› 1991, Vol. 9 ›› Issue (3): 172-177.DOI: 10.7517/j.issn.1674-0475.1991.03.172

疏水作用对光化学和光物理过程的影响 ⅩⅢ.△⁵雄甾-3β-(1-萘乙酰)-17-丹酰酯在不良溶剂中的簇集和分子间能量传递

杨国强, 佟振合, 吴世康

中国科学院感光化学研究所, 北京 100101

收稿日期:1989-09-18 修回日期:1990-11-30 出版日期:1991-08-20 发布日期:1991-08-20
通讯作者: 杨国强

HYDROPHOBIC EFFECTS ON PHOTOCHEMICAL AND PHO-TOPHYSICAL PROCESSES Ⅷ.AGGREGATION AND INTERMOLECULAR ENERGY TRANSFER OF △⁵ ANDROSTENE-3β-(1-NAPHTHYL) ACETOXY-17-DANSYL IN POOR SOLVENTS

YANG GUO-QIANG, TUNG ZHEN-HE, WU SHI-KANG

Institute of Photographic Chemistry, Academia Sinica, Beijing 100101, P. R. China

Received:1989-09-18 Revised:1990-11-30 Online:1991-08-20 Published:1991-08-20

摘要/Abstract

摘要： 在二甲基亚砜-水(DMSO-H₂O)混合溶剂中,随着水的体积分数(Φ)增大,△⁵雄甾-3β-(1-萘乙酰)-17-丹酰酯(1)分子中丹酰基荧光峰逐渐红移,但当Φ>0.4时,丹酰基荧光峰突然由550 nm移至500 nm。表明1发生了簇集。用280 nm光激发时,伴随丹酰基荧光的蓝移,萘基的荧光明显降低,丹酰基的荧光增强,表明簇集体内1的分子相互靠近,有利于萘基向丹酰基进行分子间的能量传递。萘基向丹酰基进行能量传递的效率在簇集体外和簇集体内分别为18%和90%。荧光寿命的测定和使用不同激发波长的实验表明簇集发生后,仍有部分分子未发生簇集。

关键词: 疏水作用, 硬链段分子的簇集,△⁵-雄甾-3β-(1-萘乙酰)-17-丹酰酯, 分子内和分子间能量传递

Abstract: In dimethyl sulfoxide-water (DMSO-H₂O) mixed solvent the fluorescene spectrum of △⁵ androstene-3β-(1-naphthyl) acetoxy-17-dansyl (1) shifts to the red side as the volume fraction of water in the mixture (Φ) increases.However, the spectrum suddenly shifts from λ_max=550nm to λ_max=500nm when Φ>0.4, suggesting aggregate formation of 1 This is accompanied by the increase in dansyl fluorescence and the decrease in naphthyl fluorescence if excited at 280nm.due to the enhancement of energy transfer from naphthyl to dansyl group in aggregate.The efficiencies of the energy transfer are 18% and 90% before and after the aggregate formation respectively.Measurements of fluorescence lifetime of dansyl group and the experients by using different excitation wavelength demonstrate the existence of the equilibrium of 1 btween inside and outside of the aggregate.

Key words: hydrophobic interaction, aggregation of rigid molecule, △⁵ androstene-3β-(1-anphthyl)acetoxy-17-dansyl, inter- and intramolecular energy transfer

杨国强, 佟振合, 吴世康. 疏水作用对光化学和光物理过程的影响 ⅩⅢ.△⁵雄甾-3β-(1-萘乙酰)-17-丹酰酯在不良溶剂中的簇集和分子间能量传递[J]. 影像科学与光化学, 1991, 9(3): 172-177.

YANG GUO-QIANG, TUNG ZHEN-HE, WU SHI-KANG. HYDROPHOBIC EFFECTS ON PHOTOCHEMICAL AND PHO-TOPHYSICAL PROCESSES Ⅷ.AGGREGATION AND INTERMOLECULAR ENERGY TRANSFER OF △⁵ ANDROSTENE-3β-(1-NAPHTHYL) ACETOXY-17-DANSYL IN POOR SOLVENTS[J]. Imaging Science and Photochemistry, 1991, 9(3): 172-177.

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[2]	徐承柏, 佟振合. 疏水作用对光化学和光物理过程的影响 Ⅻ.2-羟基-4-烷氧基二苯甲酮在不良溶剂中的簇集[J]. 影像科学与光化学, 1991, 9(2): 85-90.
[3]	佟振合, 欧阳心心, 刘顒顒. 疏水作用对光化学和光物理过程的影响 Ⅶ.芘基烷基酮的荧光光谱及其在不良溶剂中的簇集[J]. 影像科学与光化学, 1988, 6(4): 17-23.
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疏水作用对光化学和光物理过程的影响 ⅩⅢ.△⁵雄甾-3β-(1-萘乙酰)-17-丹酰酯在不良溶剂中的簇集和分子间能量传递

HYDROPHOBIC EFFECTS ON PHOTOCHEMICAL AND PHO-TOPHYSICAL PROCESSES Ⅷ.AGGREGATION AND INTERMOLECULAR ENERGY TRANSFER OF △⁵ ANDROSTENE-3β-(1-NAPHTHYL) ACETOXY-17-DANSYL IN POOR SOLVENTS

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