SUPRAMOLECULAR EFFECTS ON PHOTOCHROMISM - PROPERTIES OF CROWN ETHER-MODIFIED DIHYDROINDOLIZINES

被引：28

作者：

DURR, H ^{[1
]}

THOME, A ^{[1
]}

KRANZ, C ^{[1
]}

KILBURG, H ^{[1
]}

BOSSMANN, S ^{[1
]}

BRAUN, B ^{[1
]}

JANZEN, KP ^{[1
]}

BLASIUS, E ^{[1
]}

机构：

[1] UNIV SAARLAND,FACHBEREICH 115,W-6600 SAARBRUCKEN,GERMANY

来源：

JOURNAL OF PHYSICAL ORGANIC CHEMISTRY | 1992年 / 5卷 / 10期

关键词：

D O I：

10.1002/poc.610051011

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Photochromic molecules such as dihydroindolizines (DHI) containing crown ether units can be 'tuned', as far as their properties are concerned, by supramolecular ion binding. Inclusion of the ion in the crown ether cavity yields a new supramolecular species. This species shows special properties of the excited state after guest addition: (a) bathochromic shifts of the photochromic crown ethers and also hyperchromic effects in the UV spectra; (b) fluorescence intensity of one of the photochromic crown ethers in either increased (crown excitation) or decreased (DHI excitation) after addition of alkali metal ions; and (c) in the ground state a large change in reaction rate for the reaction 1,5-electrocyclization betaine (coloured form) to dihydroindolizine is observed in the supramolecular complexes.

引用

页码：689 / 698

页数：10

共 28 条

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