Abstract
Abstract We have studied the liquid crystalline behavior of a polymerizable diacetylenic phosphocholine lipid l,2-bis(10,12-tricosadiynoyl-sn-glycero-3-phosphocholine (DC8,9PC). Optical polarized microscopy reveals several types of textures corresponding to normal as well as tilted smectic phases for the dry sample while only the oily streak texture of the Lα phase is seen for the sample with 5% water. X-ray diffraction data show that the lamellar order in the hydrated sample is more pronounced than that in the dry sample. Also, a pronounced change in the layer structure occurs for both the dry and 5% hydrated samples at the chain melting temperature. These structural changes are discussed in relation to the optical microscopic observations.
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