Effect of alkyl chain length on thermochromic phase transition in rethane-substituted polydiacetylene crystals

Hiroaki Tachibana; Noriko Hosaka; Yoshinori Tokura

doi:10.1016/S0032-3861(01)00284-1

Effect of alkyl chain length on thermochromic phase transition in rethane-substituted polydiacetylene crystals

Hiroaki Tachibana, Noriko Hosaka, Yoshinori Tokura

ENG - Electronic Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

A series of urethane-substituted polydiacetylenes (PDA-mUEt) with different alkyl chain lengths (m = 4, 5, and 6) in side chain substituents of (CH₂)_mOCONHC₂H₅ were synthesized. The effect of the alkyl chain length on the thermochromic phase transition was investigated by measurements of reflectance spectra for the PDA-mUEt crystals. The thermochromic phase transition shows an even-odd effect for the alkyl chain length. The PDA-5UEt crystal undergoes a reversible thermochromic phase transition between A (blue) and B (red) phases, while the even-numbered PDA-mUEt crystal turns to the B phase on heating but does not revert completely to the initial A phase even when cooled down to room temperature. The difference in the thermochromic phase transitions of PDA-mUEt crystals with varying alkyl chain length was also studied by the differential scanning calorimetry (DSC).

Original language	English
Pages (from-to)	8311-8314
Number of pages	4
Journal	Polymer
Volume	42
Issue number	19
DOIs	https://doi.org/10.1016/S0032-3861(01)00284-1
Publication status	Published - 2001 Jun 18

Keywords

Even-odd effect
Thermochromism
Urethane-substituted polydiacetylene

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10.1016/S0032-3861(01)00284-1

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title = "Effect of alkyl chain length on thermochromic phase transition in rethane-substituted polydiacetylene crystals",

abstract = "A series of urethane-substituted polydiacetylenes (PDA-mUEt) with different alkyl chain lengths (m = 4, 5, and 6) in side chain substituents of (CH2)mOCONHC2H5 were synthesized. The effect of the alkyl chain length on the thermochromic phase transition was investigated by measurements of reflectance spectra for the PDA-mUEt crystals. The thermochromic phase transition shows an even-odd effect for the alkyl chain length. The PDA-5UEt crystal undergoes a reversible thermochromic phase transition between A (blue) and B (red) phases, while the even-numbered PDA-mUEt crystal turns to the B phase on heating but does not revert completely to the initial A phase even when cooled down to room temperature. The difference in the thermochromic phase transitions of PDA-mUEt crystals with varying alkyl chain length was also studied by the differential scanning calorimetry (DSC).",

keywords = "Even-odd effect, Thermochromism, Urethane-substituted polydiacetylene",

author = "Hiroaki Tachibana and Noriko Hosaka and Yoshinori Tokura",

note = "Funding Information: This work was supported by a Grant-In-Aid for Scientific Research from the Ministry of Education, Science and Culture, Japan and by the New Energy and Industrial Technology Development Organization (NEDO).",

year = "2001",

month = jun,

day = "18",

doi = "10.1016/S0032-3861(01)00284-1",

language = "English",

volume = "42",

pages = "8311--8314",

journal = "Polymer",

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number = "19",

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T1 - Effect of alkyl chain length on thermochromic phase transition in rethane-substituted polydiacetylene crystals

AU - Tachibana, Hiroaki

AU - Hosaka, Noriko

AU - Tokura, Yoshinori

N1 - Funding Information: This work was supported by a Grant-In-Aid for Scientific Research from the Ministry of Education, Science and Culture, Japan and by the New Energy and Industrial Technology Development Organization (NEDO).

PY - 2001/6/18

Y1 - 2001/6/18

N2 - A series of urethane-substituted polydiacetylenes (PDA-mUEt) with different alkyl chain lengths (m = 4, 5, and 6) in side chain substituents of (CH2)mOCONHC2H5 were synthesized. The effect of the alkyl chain length on the thermochromic phase transition was investigated by measurements of reflectance spectra for the PDA-mUEt crystals. The thermochromic phase transition shows an even-odd effect for the alkyl chain length. The PDA-5UEt crystal undergoes a reversible thermochromic phase transition between A (blue) and B (red) phases, while the even-numbered PDA-mUEt crystal turns to the B phase on heating but does not revert completely to the initial A phase even when cooled down to room temperature. The difference in the thermochromic phase transitions of PDA-mUEt crystals with varying alkyl chain length was also studied by the differential scanning calorimetry (DSC).

AB - A series of urethane-substituted polydiacetylenes (PDA-mUEt) with different alkyl chain lengths (m = 4, 5, and 6) in side chain substituents of (CH2)mOCONHC2H5 were synthesized. The effect of the alkyl chain length on the thermochromic phase transition was investigated by measurements of reflectance spectra for the PDA-mUEt crystals. The thermochromic phase transition shows an even-odd effect for the alkyl chain length. The PDA-5UEt crystal undergoes a reversible thermochromic phase transition between A (blue) and B (red) phases, while the even-numbered PDA-mUEt crystal turns to the B phase on heating but does not revert completely to the initial A phase even when cooled down to room temperature. The difference in the thermochromic phase transitions of PDA-mUEt crystals with varying alkyl chain length was also studied by the differential scanning calorimetry (DSC).

KW - Even-odd effect

KW - Thermochromism

KW - Urethane-substituted polydiacetylene

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U2 - 10.1016/S0032-3861(01)00284-1

DO - 10.1016/S0032-3861(01)00284-1

M3 - Article

AN - SCOPUS:0035908163

SN - 0032-3861

VL - 42

SP - 8311

EP - 8314

JO - Polymer

JF - Polymer

IS - 19

ER -

Effect of alkyl chain length on thermochromic phase transition in rethane-substituted polydiacetylene crystals

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Keywords

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