Novel thermochromic copolymers with two luminescent colors

Chemistry Letters

Volumn 32, Issue 7, 2003, Pages 570-571

  Li, Chen ^a   Du, Pa ^a   Tian, He ^a   Erk, Peter ^b  

^a EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY   (China)

^b BASF SE   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

DYE; STYRENE MALEIC ANHYDRIDE COPOLYMER;

ARTICLE; COLOR; FLUORESCENCE; LIGHT; LUMINESCENCE; THERMOGRAPHY;

EID: 0141429076     PISSN: 03667022     EISSN: None     Source Type: Journal    
DOI: 10.1246/cl.2003.570     Document Type: Article

References (17)

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15. 3), 7.85(m, 1H, naphthalic H), 8.3(d, 1H, naphthalic H, J = 8.56), 8.55(d, 1H, naphthalic H, J = 8.38), 8.6(d, 1H, naphthalic H, J = 8.34), 8.64(d, 1H, naphthalic H, J = 7.28). Mass spectra were obtained with HP5989A, Mariner API time of flight (TOF, TIS ion source, PE Corp.) and API2000 (TIS, PE Corp.) spectrometers. Infrared spectra were measured on a Nicolet Magna IR550. UV-vis-NIR spectra were recorded on a Varian Cary500. Fluorescence spectrum was recorded on a Varian Cary eclipse fluorescence spectrophotometer. Quinoline was distilled over calcium hydride. SMA series were donated by SARTOMER Co. Inc. (ATOFINA) Shanghai Office.
16. The temperature in Figure 3 is increased regularly and all temperature points are kept constant for 5 minutes. While the decomposition and oxidation of the group on the 4-position of naphthalimide depend on not only the temperature changes but also the heating time. All maximum fluorescent wavelengths at different temperatures lower than 110°C or higher than 160°C are similar. While the fluorescence is red shifted greatly from 110°C to 160°C, which shows that the animo group is easily to be produced on the 4-position of naphthalimide during this temperature range. All fluorescent intensity at different temperatures higher than 160°C decreases quickly, which shows that the amino group on the 4-position is easy to become nitroso group at the temperature higher than 160°C. In summary, the longer the heating time within the temperature range from 110°C to 160°C, the more quickly the fluorescence red shifted. While to the situation when the temperature is higher than 160°C, the longer the heating time, the more quickly the fluorescence intensity decreases.
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