Macromolecules, Vol. 36, No. 21, 2003
Helical Disubstituted Polyacetylenes 7937
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(dCH), 4.86 (m, 1H, OCH), 2.49, 2.01, 1.51, 1.28, 1.10, 0.9,
0.73. 13C NMR (75 MHz, CDCl3), δ (TMS, ppm): 164.9 (ArCO2),
164.3 (dCCO2), 154.0 (aromatic carbon linked with OCO and
ArCd), 139.3 (dCCO2 and CdCH), 135.0 (aromatic carbons
ortho to CdC), 131.0 (aromatic carbons ortho to CO2 and para
to CdC), 128.3 (aromatic carbon linked with CO2 and meta to
CdC), 122.7 (dCH), 121.6 (aromatic carbons meta to CO2),
74.8 (OCH), 56.7, 56.1, 50.1, 42.4, 39.6, 38.2, 37.1, 36.8, 36.3,
35.9, 32.0, 28.4, 28.2, 24.5, 24.0, 23.0, 22.7, 21.2, 19.5, 18.9,
12.1. UV (THF, 71 µM), λ (nm)/ꢀ (104 mol-1 L cm-1): 234/1.44,
335/0.44, 400/0.32.
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Ack n ow led gm en t. This project was partially sup-
ported by the Hong Kong Research Grants Council
(Project Nos. HKUST 6187/99P, 6121/01P, 6085/02P,
and 6049/03P) and the University Grants Committee
of Hong Kong through an Area of Excellence Scheme
(Project No. AoE/P-10/01-1-A). This project was also
benefited from the support by the Institute of Nano
Materials and Technology and the Center for Display
Research of our University.
Su p p or tin g In for m a tion Ava ila ble: UV spectra of THF
solutions of P1-P4 at room temperature (Figure s1). This
material is available free of charge via the Internet at http://
pubs.acs.org.
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