High Efficiency Platinum Acetylide Nonlinear Absorption Chromophores Covalently Linked to Poly(methyl methacrylate)

Abstract

We report three platinum acetylide acrylate monomers containing known two-photon absorption (TPA) chromophores and their covalent incorporation into polymers via free radical polymerization with methyl methacrylate. The photophysical properties of the platinum acetylide monomers and resulting poly(methyl methacrylate) (PMMA) copolymers were investigated to determine if the one- and two-photon photophysical properties of the chromophores were maintained in the copolymers. The photophysical properties of the series of copolymers were studied in solution and solid state with minimum shifts exhibited in the ground state absorption, photoluminescence, and triplet-triplet transient absorption spectra. The polymer films displayed markedly stronger phosphorescence and longer triplet excited state lifetimes than the polymers in solution or the monomers. The incorporation of the platinum acetylide chromophores into the PMMA copolymers allows the materials to be cast as thin films or into free-standing monoliths. Films with ~3.6 μm in thickness and monoliths with 1 mm path length were fabricated and examined. The nonlinear absorption responses of the polymers in solution were measured via the nanosecond z-scan method, and the solid state polymer monoliths were measured via nonlinear transmittance. Both measurements indicate that the polymers exhibited strong transmittance attenuation at input pulse energies exceeding 100 μJ.

Synthesis of cross-linked polyurethane elastomers with the inclusion of polar-aromatic moieties (BA, PNBA and 3, 5-DNBA): Electrical and thermo-mechanical properties analysis

“…For example, doping a nonpolar polymer with a polar compound has yielded considerable success, allowing the optimization of the dopant for ideal optical properties and the optimization of the polymer for easy processing. Complex chromophore molecules are dispersed in nonpolar polymers such as poly (methyl methacrylate) (PMMA) and poled to produce axial alignment [11,[20][21][22]26].…”

Synthesis and Photophysical Properties of Laterally Asymmetric Digold(I) Alkynyls and Triazolyl: Ancillary Ligand and Organic Functionality Dictate Excited-State Dynamics

“…Polymetallynes have long been studied as photoactive materials. ,,,,− ,− The ease of modifying the alkynyl ligands, coupled with triplet-state photophysics in solution and the solid state, lends them to a variety of applications, including organic light emitting diodes (OLEDS), − optoelectronics, − sensors, ,, and nonlinear optics (NLO), − among others. , Much of this work has focused on polymeric and multinuclear Pt­(II) complexes. In these d 8 species, the heavy-metal atom facilitates intersystem crossing to the triplet excited state manifold.…”

Superior optical nonlinearity of an exceptional fluorescent stilbene dye

“…15,16 Regarding the detailed 2PA-ESA process (due to the absorption of a singlet excited state or a triplet excited state), femtosecond pumped transient absorption and nanosecond flash photolysis experiments remained desirable. 17,18 Even so, the good optical limiting behaviors under the excitation of femtosecond and nanosecond pulses suggested the great potentials in many applications, such as reshaping and optical stabilization. 19 To elucidate the potential application of stilbene chromophore as a biomarker, two-photon confocal microscopic studies of stilbene chromophore in HeLa cells were performed.…”