Effect of alkyl chain length on thermochromism of novel nitro compounds
- Authors
- Lee, Sang Cheol; Jeong, Young Gyu; Jang, Suk Hyun; Jo, Won Ho
- Issue Date
- Apr-2007
- Publisher
- KOREAN FIBER SOCIETY
- Keywords
- thermochromism; thermochromic transition temperature; even-odd fluctuation
- Citation
- FIBERS AND POLYMERS, v.8, no.2, pp 234 - 236
- Pages
- 3
- Journal Title
- FIBERS AND POLYMERS
- Volume
- 8
- Number
- 2
- Start Page
- 234
- End Page
- 236
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/26670
- DOI
- 10.1007/BF02875798
- ISSN
- 1229-9197
1875-0052
- Abstract
- A series of novel nitro compounds containing different alkyl chain length (x=2 similar to 5), 1,5-bis(hydroxyalkylamino)-2,4-dinitrobenzene (BDBx), are synthesized and their thermochromic behavior is investigated by using differential scanning calorimetry and optical microscopy. All the BDBx crystals synthesized show yellow color at room temperature. BDBx (x=2 similar to 4) samples display orange color even in the solid when heated above respective thermochromic transition temperature, while the yellow color of BDB5 changes to orange with melting. The orange color of BDBx crystals returns to yellow when cooled down to room temperature, indicating that the thermochromic behavior of BDBx is reversible. The thermochromic transition temperatures of BDBx crystals are found to be decreased with increasing the alkyl chain length, exhibiting even-odd fluctuation.
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