Synthesis and Photophysical Investigations of Novel Polymerizable Blue Emitting Fluorophores – Combination of a Hindered Amine with a Benzo[de]isoquinoline‐1,3‐dione

Abstract

Summary: New monomeric benzo[de]isoquinoline‐1,3‐dione blue emitting fluorophores, containing hindered amine stabilizer fragment have been synthesized under phase transfer catalysis conditions and their ability for “one‐step” optical bleaching and stabilization of poly(methyl methacrylate) has been demonstrated. During the co‐polymerization, no changes in the chromophoric system of the fluorophore occurred. The chemical bonding of the synthesized monomers in the polymer chain was confirmed spectrophotometrically. The absorption and some basic photophysical characteristics of the low and high molecular weight fluorescent brighteners have been determined. Photostability of the new monomeric fluorophores and their influence on the photostability of the blue emitting side‐group co‐polymers obtained have been established. A significant stabilizing effect against photodegradation was determined. magnified image

Synthesis, third-order nonlinear optical (NLO) properties of polystyrene containing 1,8-naphthalimide chromophores in the side chain

“…All the copolymers have the same emission spectra as their relative naphthalimide monomers have. Besides, compared with the emission of NAOPH and p(st-co-NAOPH), NA3OPH and p(st-co-NA3OPH) have a longer emission wavelength due to a more effective charge transfer in the naphthalimide-based structure, which is consistent with the results observed in the UV-vis spectra [22]. …”

“…Such phenomenon indicates that the basic chromophoric system of naphthalimide monomers does not change after the polymerization [21,22]. Figure 4 shows the emission spectra of NAOPH, NA3OPH, p(st-co-NAOPH) and p(st-co-NA3OPH) in THF solutions excited at 450 nm.…”

Influence of Polarity of Solvents on the Spectral Properties of Bichromophoric Coumarins

“…1,8-Naphthylimides substituted at various positions, mainly by strong electron donating substituents, is widely used as a structural unit in simple or complex dyes employed for the construction of various fluorescence probes [ 1 , 2 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 ] due to their interesting spectral properties, namely intense fluorescence. The probes composed of 1,8-naphthalimide and sterically hindered amines have been characterized in solution and in polymer matrices [ 52 ].…”

Synthesis and Light-Stabilizing Ability of a Series of Hindered Piperidine Derivatives

“…In the past two decades, several HALSs containing 2,2,6,6-tetramethylpiperidine have been reported, such as polymeric HALS, [1][2][3][4][5][6][7][8][9][10][11] multifunctional HALS [11][12][13] and reactive HALS. [4] Chimassorb 944, as an excellent representative of polymer HALS, with a number average molecular weight of about 2000 to 3000, exhibited good thermal stability and resistance to extraction.…”