Fluorescence from Fluorescent Dye molecule (I)

C. L. Wang; Z. J. Zhang; C. Y. Chen; Y. M. Kuo; D. Y. Chao

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P257 - 280

Basic & Applied Sciences > General

DOI： 10.6364/HKJS

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Fluorescence from Fluorescent Dye molecule (I)

螢光染料分子之螢光性（I）

王振利(C. L. Wang) ；章竹君(Z. J. Zhang) ；陳建逸(C. Y. Chen) ；郭陽明(Y. M. Kuo) ；趙鼎揚(D. Y. Chao)

華岡理科學報； 20期 (2003 / 05 / 01) ， P257 - 280

英文

Abstract │ Times Cited (221) │ Altmetrics

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We have successfully synthesized a series of reactive fluorescent dyes and their structure has been proven by infrared spectra, NMR spectra and Mass spectra, respectively. The fluorescence performance for respective 2-benzyl-6-hydroxy-benzo[de] isoquinoline-l, 3-dione and 6-hydroxy-2-phenyl-benzo[de] isoquinoline-l,3-diolle appears at around 437.4nm, and their quantum yields are 0.562 and 0.057, respectively. It is important to indicate that the fluorescence performance is seen to be better for 2-benzyl-6-hydroxy-benzo[de] isoquinoline-l ,3-dione than for 6-hydroxy-2-phenyl-benzo[de] isoquinoline-1,3-dione, as a result of more electron donating groups linked to the 2-benzyl-6-hydroxy-benzo[de] isoqinoline-l,3-dione molecule. ‘These electron donating groups may help the aromatics of the fluorescent dye molecule, [i.e. 2-benzyl-6-hydroxy –benzo[de] isoquinoline-l,3-dione] , to be excited strongly by absorbing UV light. These fluorescent dyes have further reacted with toluene diisocyanate and other additives to form the fluorescent dye-based polyurethane ionomer molecules, and their structures have been demonstrated by IR spectra. In aqueous solution, the fluorescence performance appears to be better for 2-benzyl-6-hydroxy-benzo[de] isoquinoline-1,3-dione based PU ionomer than for 6-hydroxy-2-phenyl- benzo[ de] isoquinoline-l,3-dione based PU ionomer. Our experimental results show that increased concentration of 2-benzyl-6-hydroxy-benzo [de] isoquinoline-1,3-dione molecule linked to the backbone of the PU ionomer molecule may reduce the fluorescence performance of this PU ionomer molecule resulting from the intramolecular interaction between ionomer molecule itself. For the fluorescent dye-based PU ionomer molecule system, the number average particle sizes of the fluorescent dye-based PU ionomer molecule in water increase with increasing concentration of the florescent dye, as a result of increased free volume of the ionomer molecule. Our experimental results also indicate that the tensile strength of self-cured film made by the fluorescent dye-based PU ionomer is seen to increase with an increase in the concentration of 2-benzyl-6-hydroxy-benzo[de] isoquinoline-l,3-dione. This may be the result of increased intermolecular interaction between ionomer – ionomer molecules themselves.

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