Eucalyptus Jicifolia F. Muell., restricted to the southeast area of Western Australia, has been introduced into New Zealand under the name of scarlet flowering gum. The essential oil, obtained in 0.18% yield, has been shown by preparative gas-liquid chromatography (g.1.c.) to contain a-and P-pinene, limonene, y-terpinene, p-cymene, and possibly a-thujene and A3-or A4-carene.
The cationic amphiphile meso-tetrakis (1-octyloxycarbonylmethyl-4-pyridinio) porphyrin has been prepared by quaternization of tetra(4-pyridyl) porphyrin . Its self-aggregation into columnar face-to-face stacks is indicated by n.m.r. and electronic absorption spectra in chloroform and chloroform/methanol mixtures. In 10 mole % CD3OD/CDCl3 solution, concentration-dependent dimerization occurs, with an association constant Kd 5.81×103 dm3 mol-1. In pure methanol, chemical shifts are concentration dependent, but do not fit a simple dimerization model. In water/methanol mixtures, aggregation occurs so that the hydrocarbon chains approach the porphyrin core, but the macrocycles do not stack in a face-to-face manner.
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