Photocontrollable Cation Extraction with Crowned Oligo(spirobenzopyran)s

The photoinduced changes of metal-ion extractability of crown ether derivatives bearing three or four spirobenzopyran moieties and their analogues were studied using 1,2-dichloroethane as the organic solvent. Under dark conditions, these compounds extracted Cu2+, Ag+, and Pb2+ with their counteranio...

Full description

Saved in:
Bibliographic Details
Published inAnalytical Sciences Vol. 21; no. 4; pp. 403 - 408
Main Authors NAKAMURA, Makoto, SAKAMOTO, Hidefumi, KIMURA, Keiichi
Format Journal Article
LanguageEnglish
Published Japan The Japan Society for Analytical Chemistry 01.04.2005
Japan Science and Technology Agency
Online AccessGet full text

Cover

More Information
Summary:The photoinduced changes of metal-ion extractability of crown ether derivatives bearing three or four spirobenzopyran moieties and their analogues were studied using 1,2-dichloroethane as the organic solvent. Under dark conditions, these compounds extracted Cu2+, Ag+, and Pb2+ with their counteranions from the aqueous phase to the organic phase. The extraction equilibrium constants of the photochromic crown ether derivatives for Cu2+ and Ag+ were determined successfully. Under UV-light irradiation conditions, the extraction of Cu2+ by crowned tris(spirobenzopyran) was enhanced, while that of Ag+ was suppressed. During the competitive metal-ion extraction of crowned oligo(spirobenzopyran)s between Cu2+ and Ag+, the metal-ion selectivity was reversed explicitly by photoirradiation.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.21.403