A Novel Precursor for Color and Fluorescence Imaging

Photoimaging of Protected Dye Molecules in Polymer Films by Chemical Amplification.

“…[9] TBDMS-protected quinizarin 2 was prepared by treating quinizarin (4) with tert-butyldimethylsilyl chloride (TBDMSCI) in the presence of triethylamine in THE Recrystallization from ethyl acetate provided the desired product 2 in 80% yield. The tBoc-protected 2-dodecylquinizarin 3 was prepared in two steps.…”

“…Recently, we have reported synthesis of a t-Boc-protected quinizarin 1 and application to photoimaging by a chemical amplification process. [9] In order to optimize conditions for imaging patterns and to compare with other derivatives, tert-butyldimethylsilyl (TBDMS)-protected quinizarin derivative 2 and t-Boc-protected 2-dodecylquinizarin 3 were prepared and their photoimaging capabilities were investigated ( Fig. 1).…”

Photoinduced Fluorescence "Turn-On" Micropatterning with Substituted Triphenylmethane Derivatives

“…The acid labile tert-butoxycarbonyl group (t-Boc) is commonly employed as the protecting group in systems of this type since it can be readily removed by UV irradiation in the presence of a photoacid generators (PAG). 6,7 Photoinduced oxidation of a precursor molecule can be employed to generate patterned fluorescence images in polymer films. [8][9][10] This strategy takes advantage of the fact that certain fluorescent compounds often lose their ability to fluoresce when they undergo UV-induced oxidative degradation.…”

Photoinduced Fluorescence Patterning with a t-Boc Protected Dihydroxyphenylene Derivative

“…requirement of wet developing step) associated with the 'two-step procedure', we have developed a new method called 'precursor approach' for the fabrication of patterned fluorescence images. 8 The concept of the 'precursor approach' is based on a fluorescence change by photoinduced structural transformations of precursor molecules. For example, a dye molecule is nonfluorescent (or displays a single fluorescent color) when the key functional group of the dye molecule is protected with a protecting group.…”