## Abstract A series of monoaza‐15‐crown‐5 ethers (2b‐2h) having 4′‐hydroxy‐3′,5′‐disubstituted benzyl groups have been prepared by the Mannich reaction of 2,6‐disubstituted phenols with the corresponding __N__‐methoxymethylmonoaza‐crown ethers. Competitive transport through a chloroform membrane b
✦ LIBER ✦
Photochromic bis(monoaza-crown ether)s. Alkali-metal cation complexing properties of novel diarylethenes
✍ Scribed by Stephen H. Kawai
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- French
- Weight
- 230 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
The novel bis(monoaza-crown ether) diarylethenes 1 and 2 have been synthesized and their photochromism and the ion-complexation properties of both photoisomers have been investigated.
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The complexation of a series of bis(benzo crown ether)s of variable ring size and length of the linking chain with Na , K and Cs was studied in the gas phase by fast atom bombardment mass spectrometry in nitrobenzyl alcohol/glycerol as a matrix. Both 2:1 (conventionally within the cavity of the crow