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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 35, Number 6
JKCSEZ 35(6)
December 20, 1991 

Aggregation of Methylene Blue on the L-α-lecithin Bilayer Membrane

L-α-lecithin 이중층막에서 Methylene Blue의 회합
Hong Lee, Hoo-Seol Lee

이홍, 이후설
Sodium dodecyl sulfate(SDS), chondroitin sulfate 그리고 L-α-lecithin vesicle의 각각의 수용액에서 methylene blue (MB)의 Metachromatic 성질을 18℃에서 52℃까지 흡수분광법으로 측정했다. MB는 지질이 고농도일 때 vesicle 매트릭스에 뭉치를 형성했다. MB의 metachromasy는 vesicle의 상전이 온도에 무관하게 나타났으며, 이것은 색소가 vesicle의 친수성 표면에서 회합함을 의미한다. Vesicle에서 MB의 metachromasy 현상은 hexadecyltrimethylammonium bromide(CTAB)를 첨가할 때보다 SDS를 첨가할 때 매우 약하게 관측되었다. 이것은 vesicle 표면에서 계면활성제들의 끼어드는 위치가 다른 것으로 보이며, CTAB가 SDS보다 색소뭉치 사이에 더욱 잘 끼어드는 것으로 사료된다.

Metachromatic behavior of methylene blue (MB) in solutions of aqueous sodium dodecyl sulfate (SDS), chondroitin sulfate and L-α-lecithin vesicle at 18~52℃ has been studied by absorption spectroscopy. MB was clustered in the matrix of the vesicle with high concentration of L-α-lecithin. The metachromasy of MB was found to be independent of phase transition temperature of vesicles. These results suggest that the dyes were aggregated on the hydrophilic surfaces of vesicle. In the vesicular system, the metachromatic effect of MB was dramatically decreased in the presence of hexadecyltrimethylammonium bromide (CTAB) than SDS. It is estimated that the intercalation site of these surfactants on vesicle surfaces was different, that is, the intercalation of CTAB was more effective than that of SDS.

612 - 616
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