Cause of absorption band shift of disperse red-13 attached on silica spheres

Byoung-Ju Kim; Hyung-Deok Kim; Na-Rae Kim; Byeong-Gyu Bang; Eun-Hye Park; Kwang-Sun Kang

doi:10.1117/12.2187686

20 August 2015 Cause of absorption band shift of disperse red-13 attached on silica spheres

Byoung-Ju Kim, Hyung-Deok Kim, Na-Rae Kim, Byeong-Gyu Bang, Eun-Hye Park, Kwang-Sun Kang

Proceedings Volume 9549, Physical Chemistry of Interfaces and Nanomaterials XIV; 95490P (2015) https://doi.org/10.1117/12.2187686
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States

Abstract

A reversible color change and large absorption band shift have been observed for the disperse red-13 (DR-13) attached on the surface of the monodisperse silica spheres. Two step synthetic processes including urethane bond formation and hydrolysis-condensation reactions were used to attach the DR-13 on the surface of the silica spheres. After the reaction, the characteristic absorption peak at 2270 cm^-1 representing the –N=C=O asymmetric stretching vibration disappeared, and the a new absorption peak at 1700 cm^-1 corresponding the C=O stretching vibration appeared. A visual and reversible color change was observed before and after wetting in alcohol. Although the absorption peak of DR-13 in alcohol is at 510 nm, the absorption peak shifts to 788 nm when it is dried. The absorption peak shifts to 718 nm when it is wetted in alcohol. This result can be explained by the formation of intramolecular charge transfer band.

Conference Presentation

Citation Download Citation

Byoung-Ju Kim, Hyung-Deok Kim, Na-Rae Kim, Byeong-Gyu Bang, Eun-Hye Park, and Kwang-Sun Kang "Cause of absorption band shift of disperse red-13 attached on silica spheres", Proc. SPIE 9549, Physical Chemistry of Interfaces and Nanomaterials XIV, 95490P (20 August 2015); https://doi.org/10.1117/12.2187686

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