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Publikācija: Glass-Forming Non-Symmetric Bis-Styryl-DWK-Type Dyes for Infra-Red Radiation Amplification Systems

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Research project
Defending: ,
Publication language English (en)
Title in original language Glass-Forming Non-Symmetric Bis-Styryl-DWK-Type Dyes for Infra-Red Radiation Amplification Systems
Field of research 2. Engineering and technology
Sub-field of research 2.4 Chemical engineering
Research platform Materials, Processes, and Technologies
Authors Elmārs Zariņš
Jūlija Perveņecka
Aivars Vembris
Valdis Kokars
Keywords Laser dye; Amplified spontaneous emission; DWK; 4H-pyran-4-ylidene; Amorphous material
Abstract A series of D-π-A type organic dyes with bulky triphenylmethyl moiety containing 2,6-bis-(4-substituted)styryl-4H-pyran-4-ylidene donor (D) fragments and different electron acceptors (A) were synthesized and investigated, mostly for potential applications in organic solid-state lasers as infra-red (IR) radiation amplification medium. Dye glass transition temperature is above 99 °C with thermal stability in the region from 173 °C to 326 °C which was slightly influenced by the electron acceptor fragment attached to the 4H-pyrane ring in 4-position. Introducing substituents in 4-position within one of the styryl-fragments with stronger electron withdrawing properties decreased ASE excitation threshold values (Eth) up to 180 μJ/cm2 in dye spin-cast neat films and shifted photoluminescence and amplified spontaneous emission (ASE) processes into the infra-red (IR) region. Although more studies are required, some of the investigated non-symmetric bis-styryl-DWK-dyes show potential as a solution-processable gain medium for IR radiation amplification.
DOI: 10.1016/j.optmat.2019.05.002
Hyperlink: https://www.sciencedirect.com/science/article/pii/S0925346719303003?via%3Dihub 
Reference Zariņš, E., Perveņecka, J., Vembris, A., Kokars, V. Glass-Forming Non-Symmetric Bis-Styryl-DWK-Type Dyes for Infra-Red Radiation Amplification Systems. Optical Materials, 2019, Vol.93, pp.85-92. ISSN 0925-3467. Available from: doi:10.1016/j.optmat.2019.05.002
Additional information Citation count:
  • Scopus  0
ID 29155