Reversible and irreversible thermochromic phase transitions in single crystals of polydiacetylenes substituted with alkyl-urethanes

Journal of Chemical Physics - Tập 92 Số 12 - Trang 7581-7588 - 1990
Shin‐ya Koshihara1, Yoshinori Tokura1, Kenji Takeda2, T. Koda3, Akiko Kobayashi4
1Department of Physics, University of Tokyo, Tokyo 113, Japan
2Department of Synthetic Chemistry, University of Tokyo, Tokyo 113, Japan
3Department of Applied Physics, University of Tokyo, Tokyo 113, Japan
4Department of Chemistry, University of Tokyo, Tokyo 113, Japan

Tóm tắt

Reversible transitions between the two spectroscopically distinct phases (A and B phases) have been investigated for a new family of polydiacetylenes (PDAs) substituted with side groups of alkyl-urethane [−(CH2)4OCONH(CH2)n−1CH3:n=1−10]. Measurements of optical spectra as well as x-ray and calorimetric studies have revealed the first-order-like phase transitions in a series of PDAs with n=1–10 which are associated with an n-dependent thermal hysteresis ranging from 0 to 60 K in width. It has been found that the thermochromic changes become irreversible in all these PDAs once the hydrogen bond chains in the side groups are interrupted by heating beyond the polymer melting temperature.

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Tài liệu tham khảo

1977, J. Chem. Phys., 67, 3616, 10.1063/1.435361

1979, J. Polym. Sci. Polym. Chem. Ed., 17, 1631, 10.1002/pol.1979.170170607

1985, Solid State Commun., 56, 803, 10.1016/0038-1098(85)90313-8

1984, Chem. Phys., 88, 437, 10.1016/0301-0104(84)87009-3

1987, Synth. Met., 18, 407, 10.1016/0379-6779(87)90913-1

1989, Synth. Met., 28, D605, 10.1016/0379-6779(89)90750-9

1976, Phys. Rev. Lett., 36, 956, 10.1103/PhysRevLett.36.956

1987, J. Opt. Soc. Am. B, 4, 1018, 10.1364/JOSAB.4.001018

1989, Appl. Phys. Lett., 54, 2287, 10.1063/1.101104

1987, Macromolecules, 20, 3094, 10.1021/ma00178a029

1987, Macromolecules, 20, 1296, 10.1021/ma00172a023

1989, Macromolecules, 22, 1208, 10.1021/ma00193a036

1988, Makromol. Chem., 189, 1199, 10.1002/macp.1988.021890521

1980, Thin Solid Films, 68, 77, 10.1016/0040-6090(80)90138-8

1979, J. Chem. Phys., 70, 4387, 10.1063/1.438012

1984, Phys. Rev. B., 30, 702, 10.1103/PhysRevB.30.702

1981, Phys. Rev. Lett., 47, 1747, 10.1103/PhysRevLett.47.1747

1984, J. Phys. Soc. Jpn., 53, 4445, 10.1143/JPSJ.53.4445

1976, J. Am. Chem. Soc., 98, 481, 10.1021/ja00418a026

1982, Phys. Rev. B, 25, 4431, 10.1103/PhysRevB.25.4431

1985, J. Phys. Soc. Jpn., 54, 4014, 10.1143/JPSJ.54.4014

1985, Macromolecules, 18, 1676, 10.1021/ma00151a006

1986, Macromolecules, 19, 699, 10.1021/ma00157a037

1989, Macromolecules, 22, 2427, 10.1021/ma00195a072

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Thông tin xuất bản

Journal of Chemical Physics

Tập 92 Số 12

7581-7588

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