Formation of Various Bicolor Fluorescent Micropatterns on a Single Polymer Film Based on Concurrent Photobleaching and Photobase Generation

• Published in: Macromolecular rapid communications. Vol. 36; no. 6; pp. 558 - 565
• Main Authors: Chae, Kyu Ho, Kim, Hak Soo
• Format: Journal Article
• Language: English
• Published: Germany Blackwell Publishing Ltd 01.03.2015; Wiley Subscription Services, Inc
• Subjects: Anthracene; Dyeing; Dyes; dyes/pigments; Excitation; Fluorescence; Fluorescent Dyes - chemistry; imaging; irradiation; Photobleaching; Photochemistry; Polymer films; Polymeric films; Polymers - chemistry; Polymers - radiation effects; Rhodamine; Rhodamines - chemistry; Ultraviolet Rays; Wavelengths; dyes/pigments; fluorescence; photochemistry; imaging; irradiation
• ISSN: 1022-1336; 1521-3927
• DOI: 10.1002/marc.201400694

Various bicolored fluorescent micropatterns are fabricated on a single polymer film by concurrent photobleaching and a photobase generation process. A polymer, bearing anthracene and oxime–urethane groups, is dyed with rhodamine B isothiocyanate after irradiation with 310‐nm UV light. The photochemical reaction of the polymer is monitored by UV, IR absorption, and fluorescence emission spectroscopy. Differently colored fluorescent micropatterns are obtained by selectively exciting each dye moiety. Various bicolored fluorescent micropatterns are observed through varying the excitation wavelength and observation wavelength ranges using a confocal microscope. This bicolored fluorescence patterning method will be useful to apply in photonic/electronic devices. Various bicolored fluorescent micro­patterns are fabricated by concurrently photobleaching anthracene groups and photobase generating oxime–urethane groups in a polymer film after dyeing with rhodamine B isothiocyanate. Differently colored fluorescent micropatterns are obtained by selectively exciting each of the dye moieties. Various bicolored fluo­rescent micropatterns are observed by changing the excitation and observation wavelength ranges.