Synthesis and Study of the Absorption and Luminescence Properties of Polymers Containing Ru(BpyMe₂)₃²⁺ Chromophores and Coumarin Laser Dyes

Abstract

Polymers containing coumarin and Ru(BpyMe2)3 2+ chromophores were synthesized using a grafting approach and also a copolymerization approach. It was found that the solubility of polymers made from Ru-containing monomers was higher than that observed for comparable polymers obtained by grafting of Ru complexes onto bpy-containing prepolymers. The resulting bichromophoric macromolecules exhibited enhanced absorption and luminescence properties compared to the single Ru(BpyMe2)3 2+ complexes due to a very efficient (>95%) energy transfer between the coumarin donor dyes and the ruthenium chromophores. In addition, a novel system in which two different donor dyes are present together with the Ru complex was synthesized and also found to deliver efficient energy transfer to the ruthenium complexes.

Classification of novel thiazole compounds for sensitizing Ru–polypyridine complexes for artificial light harvesting

“…The approach of thiazole containing polymers might increase the molar extinction coefficient and could open a doorway to design antenna structures with integrated primary electron donors by including Ru-complexes directly into the polymer backbone [28]. Therefore, thiazoles connected in meta-position to the pyridine ring (3a, 4a) were chosen as an approach to exclude a later complexation of the thiazole dye with a Ru-precursor.…”

The design and synthesis of a novel 1,8-naphthalimide PAMAM light-harvesting dendron with fluorescence “off-on” switching core

“…The remarkable character of this photosynthetic system is that the energy of any photon absorbed by antenna complexes is transferred at >90% efficiency. Progress in the study of natural photosynthetic systems has provided the impetus to design artificial light harvesting assemblies based on a variety of architectures [3][4][5][6][7][8][9][10][11][12][13][14][15]. Dendritic light harvesting assemblies have also attracted much attention because of their unique structures, which are reminiscent of those of natural light-harvesting complexes [16][17][18][19][20][21][22][23][24][25][26][27][28].…”

An “Attachment Through Coordination” Approach to Side Chain Dendritic Polymers

“…Similar problems have also been reported in the literature and have been assigned to the strong interaction of ruthenium with the stationary phase used in the GPC columns. [13] On the other hand, viscosity measurements were performed for a dendronized polymeric complex and its uncomplexed polymeric precursor. Figure 4 shows the viscosity values obtained for polymeric complex Ia in comparison with its precursor PETH-x=11(i).…”