Trisubstituted decacyclene derivatives: Bridging the gap between the carbonaceous mesophase and discotic liquid crystals
Source abstract
Abstract
Communication: Discotic mesogens with C3 symmetry (see figure) are shown to form the basis of a chemically stable low‐temperature model for the carbonaceous mesophase, a key intermediate in the production of coke and graphite via the carbonization of organic precursors. The synthesis and properties are reported. magnified image
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Research context
OpenAlex topics: Liquid Crystal Research Advancements · Synthesis and Properties of Aromatic Compounds · Porphyrin and Phthalocyanine Chemistry
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References (40)
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1. 10.1016/B978-0-12-025005-9.50011-410.1016/B978-0-12-025005-9.50011-4 ↗
2. 10.1080/0026894810807199810.1080/00268948108071998 ↗
3. 10.1080/0026894810807199910.1080/00268948108071999 ↗
4. 10.1016/0079-6786(75)90014-X10.1016/0079-6786(75)90014-X ↗
5. Taylor G. H. · Fuel · 1961 · 40 · 465
6. 10.1038/206697a010.1038/206697a0 ↗
7. 10.1016/0008-6223(65)90047-310.1016/0008-6223(65)90047-3 ↗
8. Brooks J. D. · Carbon · 1968 · 4 · 243
9. 10.1007/BF0284625210.1007/BF02846252 ↗
10. 10.1016/B978-0-12-025005-9.50008-410.1016/B978-0-12-025005-9.50008-4 ↗
11. 10.1080/0026894840808018310.1080/00268948408080183 ↗
12. 10.1080/0026894800807350210.1080/00268948008073502 ↗
13. 10.1051/jcp/198380014910.1051/jcp/1983800149 ↗
14. 10.1016/0008-6223(65)90007-210.1016/0008-6223(65)90007-2 ↗
15. Fitzer E. · 1971 · 259
16. 10.1016/0008-6223(79)90043-510.1016/0008-6223(79)90043-5 ↗
17. 10.1021/ja00258a05710.1021/ja00258a057 ↗
18. Kohne B. · Chem.‐Ztg. · 1985 · 109 · 121
19. 10.1080/0267829870808633110.1080/02678298708086331 ↗
20. 10.1080/0026894860808081610.1080/00268948608080816 ↗
21. 10.1007/BF0152207110.1007/BF01522071 ↗
22. 10.1080/0026894840807243410.1080/00268948408072434 ↗
23. 10.1080/0026894860807961910.1080/00268948608079619 ↗
24. 10.1080/0026894840807043610.1080/00268948408070436 ↗
25. 10.1246/bcsj.61.20710.1246/bcsj.61.207 ↗
26. Kaminska B. · Polish J. Chem. · 1980 · 54 · 843
27. IR (KBr): 3090 (w) 3050 (w) 2920 2850 1668 (s) 1595 (s) 1485 1460 1400 (s) 1302 1260 1245 1220 1160 (s) 1065 1030 978 815 (s) 790 760 (s) cm−1. MS (rel. intensity): 829 (M + 1 20) 828 (M 27) 729 (10) 603 (11) 207 (13) 202 (27) 201 (12) 200 (17) 199 (12) 198 (9) 165 (9) 142 (17) 127 (37) 125 (19) 115 (9) 113 (14) 111 (8) 107 (10) 101 (18) 100 (79) 98 (14) 97 (13) 95 (11) 91 (11) 87 (12) 85 (27) 84 (26) 83 (19) 82 (18) 79 (15) 77 (11) 73 (53) 72 (14) 71 (100) 70 (76) 69 (29) 68 (14) 67 (21) 65 (12) 64 (10) 61 (11) 60 (100) 59 (14) 58 (24) 57 (100) 56 (100) 54 (90) 53 (11) Elemental anal: Calc. for C60H60O3: C 86.92 H 7.29; Found: C 86.22 H 7.05.13C‐NMR (δ CDCl3): 201.8 138.6 135.9 134.4 132.7 132.1 131.0 129.5 127.8 126.3 126.0 122.3 120.1 40.3 31.9 29.5 29.4 24.4 22.8 14.2 ppm.
28. Elemental anal. of 1 a: Calc. for C57H54O3: C 86.98 H 6.92; Found: C 87.20 H 6.65.
29. 1H‐NMR (CDCl3 400 MHz δ values in ppm J in Hz): At 2 × 10−2M: 8.03 (d J = 7.42 1 H H4); 6.79 (d J = 6.97 1 H H2); 6.60 (dd J =7.42 6.28 1 H H5); 6.43 (d J = 6.28 1 H H6); 6.22 (d J = 6.97 1 H H3); 2.64 (br t J =7.4 2 H); 1.63 (br quintet J = 6.3 2 H); 1.37 (br s 8 H); 0.95 (t J = 6.35 3 H). At 2 × 10−5M: 8.83 (d J = 8.57 1 H H4); 8.66 (d J=7.23 2H H2+ H6); 8.26 (d J=7.23 1 H H3); 7.82 (dd J= 8.57. 7.23 H5); 3.18 (t J =7.38 2H); 1.87 (br quintet J =7.34 2H); 1.23 (br s 8 H); 0.89 (t J = 6.8 3 H).
30. X‐Ray diffraction measurements were performed using an Elliott GX6 rotating anode generator operating at approximately 1.2 kW with a 200 μm focus to which was affixed a Searle camera equipped with Franks mirror optics. The Cu radiation was Ni‐filtered. During the experiment the temperature of the sample was regulated using a furnace which consisted of a copper cavity insulated with teflon and equipped with a triac temperature control (+ /−2 °C). The scattering pattern was detected using Direct Exposure Film (Kodak) during an exposure of approximately 16 h. The sample to film distance (approximately 4 cm) was calibrated with powdered calcite (d = 3.03 Å) which coated the X‐ray capillary. Measurements of the reflection spacings were made directly on the films with either a caliper or optical comparator. The powder samples were inserted into a 1.5 mm quartz X‐ray capillary and briefly annealed (5–10 min) in or near the liquid phase.
31. Levelut A. M. · J. Phys, (France) · 1981 · 42 · 14710.1051/jphys:01981004201014700 ↗
32. Vainshtein B. K. · 1966 · 203
33. Guinier A. · 1963 · 124
34. 10.1051/jcp/198380014910.1051/jcp/1983800149 ↗
35. 10.1107/S056774087500211710.1107/S0567740875002117 ↗
36. 10.1002/anie.19900177110.1002/anie.199001771 ↗
37. 10.1002/ange.1990102021410.1002/ange.19901020214 ↗
38. 10.1080/0267829890802636710.1080/02678298908026367 ↗
39. 10.1080/0267829890802895810.1080/02678298908028958 ↗
40. Kohne B. · Chimia · 1987 · 41 · 19610.2533/chimia.1987.196 ↗