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RESEARCH PRODUCT

Raman Imaging of Single Carbon Nanotubes

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[19] The single crystals of the Bu4NBr0.6I1.4Cl salt, were obtained by addition of IBr to a solution of Bu4NCl in ethanol at a reagent ratio of 1:0.5. Stoichiometry of the anion has been found by EDX. Based on a Raman study the anion consists of the I2Br ‐ (band at 140 cm ‐1 ), IBr2 ‐ (band at 150‐ 176 cm ‐1 ), BrICl ‐ (band at 225 cm ‐1 ), and ICl2 ‐ (band at 250‐263 cm ‐1 ) trihalide anions. [20] The X-ray diffraction data from single crystals for both trihalide salts were measured using an Enraf Nonius CAD4 diffractometer with graphite monochromatic Mo Ka radiation (k = 0.71073 a) at room temperature. Unit cell parameters of the new a¢¢¢- crystal were determined from a leastsquares analysis of 25 reflections. The intensities of 8106 non-zero reflections were collected by the x-scan method up to 2H = 50. The index range was ‐20 2 r(I), Rint = 0.011, were used in the structure analysis. Absorption correction was applied using the DIFABS algorithm. The main room temperature crystal data for the single crystal of 1 are as follows: a = 17.116(2), b = 8.956(1), c = 16.338(2) a, a = 88.09(2), b = 84.22(1), w = 81.22(2), V = 2462.1(5) a 3 , space group P1 ¯ , Z =3 ,M = 1024.89, dcalc =