@article{21821,
  abstract     = {Molecular photoswitches provide a means for imparting synthetic structures with intrinsically logical and highly
tunable photoresponsive properties. One variety of organic photoswitches known as Donor-Acceptor Stenhouse
Adducts, or DASAs, are promising candidates for next generation light responsive materials because of their
unique ability to stabilize three photochemically distinct isomeric states in solution, while their counterparts are
strictly limited to binary state behavior. In this work, we show how polymethacrylate host matrices shift the
energetic landscape of DASA relative to solution, prohibiting accumulation of an intermediate third isomeric
state by decelerating critical steps in the photoswitching mechanism. Specifically, we employ a dual-wavelength,
phase locked detection scheme to probe thermal isomerizations in the switching process that occur at fast (~ms)
time scales that are inaccessible by standard UV–Vis spectroscopic techniques. The results of this study provide
valuable insight into the mechanism of multistate DASA reactivity and establish the foundation necessary to
guide future efforts in offsetting kinetic matrix effects to enable dynamic, three state photoswitching in polymeric
hosts. },
  author       = {Sandlass, Sara and Stricker, Friedrich J and Fragoso, Daniel and de Alaniz, Javier Read and Gordon, Michael J.},
  issn         = {1873-2666},
  journal      = {Journal of Photochemistry and Photobiology A: Chemistry},
  publisher    = {Elsevier},
  title        = {{Effect of polymer host matrix on multi-stage isomerization kinetics of DASA photochromes}},
  doi          = {10.1016/j.jphotochem.2023.114964},
  volume       = {444},
  year         = {2023},
}

@article{1737,
  abstract     = {A new solvent-free composite polymer electrolyte consisting of high-molecular mass polyethylene oxide (PEO) filled with titanium oxide and containing LiI and I2 was developed. The introduction of the inorganic filler (TiO2 Degussa P25) into the polymer matrix produces dramatic morphological changes to the host polymer structure. Upon addition of the inorganic oxide, the surface roughness increases, with respect to the original polymer and in parallel, the fractal dimension decreases. Both the thermograms and the atomic force microscope (AFM) pictures confirm the amorphicity of the composite electrolyte. The polymer sub-units are held together in a parallel orientation, forming straight long chains of about 500 nm in width, along which TiO2 spherical particles of about 20-25 nm in diameter are distributed. The polymer chains separated by the titania particles are arranged in a three-dimensional, mechanically stable network, that creates free space and voids into which the iodide/triodide anions can easily migrate. All solid-state dye-sensitized solar cells fabricated using this composite electrolyte present high efficiencies (typical maximum incident photon to current efficiency (IPCE) as high as 40% at 520 nm and overall conversion efficiency (η) of 0.96% (Voc = 0.67 V, Jsc = 2.050 mA/cm2, FF = 39%) under direct solar irradiation. Further improvement of the photovoltaic performance is expected by optimization of the electrolyte parameters and of the cell assembly.},
  author       = {Katsaros, Georgios and Stergiopoulos, Thomas and Arabatzis, Iannis and Papadokostaki, Kyriaki and Falaras, Polycarpos},
  issn         = {1010-6030},
  journal      = {Journal of Photochemistry and Photobiology A: Chemistry},
  number       = {1-3},
  pages        = {191 -- 198},
  publisher    = {Elsevier},
  title        = {{A solvent-free composite polymer/inorganic oxide electrolyte for high efficiency solid-state dye-sensitized solar cells}},
  doi          = {10.1016/S1010-6030(02)00027-8},
  volume       = {149},
  year         = {2002},
}