Highly Fluorescent Merocyanine and Cyanine PMMA Copolymers

Abstract

Polymerizable merocyanine and cyanine dye monomers are synthesized and applied in a statistical copolymerization with methylmethacrylate, giving a series of highly fluorescent poly(methyl methacrylate) (PMMA) copolymers. Photophysical properties of yellow to red merocyanine- and of pink to dark purple cyanine-containing copolymers are studied by fluorescence spectroscopy in solid state as well as in different solvents. The highest quantum yield measured in the solid state is observed for copolymers with the lowest dye content: 16% for merocyanine-based and 13% for cyanine-based copolymers, respectively. Fluorescence properties in solution show positive solvatochromism for both merocyanine monomer and copolymer. Copolymer, in comparison to monomer, is hypsochromically shifted to lower wavelengths which point toward H-aggregation of the chromophores in the copolymer matrix.

Solid State and Aggregation Induced Emissive Chromophores by Multi‐component Syntheses

“…[18] The resulting covalently bound dye-polymer hybrids are yellow to red and solid state fluorescence spectroscopy reveals that highest quantum yields up to 16 % are found at lowest dye content. [18] The resulting covalently bound dye-polymer hybrids are yellow to red and solid state fluorescence spectroscopy reveals that highest quantum yields up to 16 % are found at lowest dye content.…”

“…A polymerizable derivative of merocyanine 7 was just recently applied in a statistical copolymerization with methyl methacrylate giving a series of highly fluorescent poly(methyl methacrylate) (PMMA) copolymers. [18] The resulting covalently bound dye-polymer hybrids are yellow to red and solid state fluorescence spectroscopy reveals that highest quantum yields up to 16 % are found at lowest dye content. In solution the copolymer fluorescence maximum is shifted hypsochromically in comparison to merocyanine 7 indicating an Haggregation of the chromophores in the copolymer matrix.…”

Functional Polymers and Polymer–Dye Composites for Food Sensing

“…In general, two strategies including polymerization of pre‐functionalized monomers and post‐polymerization modification can be used to prepare the desired polymeric sensors. [ 52,69–74 ]…”

Polymer/dye blends: Preparation and optical performance: A short review

“…To overcome this limitation, the direct grafting of a dye onto preformed macromolecular chains has been explored. [9][10][11][12] In the second approach, dye is directly dispersed into a polymer matrix (Figure 1b), leaving the macromolecules structurally unaltered and generally producing a biphasic system, unless the dye is fully soluble in the polymer. Procedures to disperse dyes into polymers, mainly virgin plastic, have been used to prepare pigmented materials since the early days of the plastic age.…”