Glass-forming nonsymmetric DWK-dyes with 5,5,5-triphenylpentyl and piparazine moieties for light-amplification studies
| dc.contributor.author | Zarins, Elmars | |
| dc.contributor.author | Puciriuss, Toms | |
| dc.contributor.author | Pervenecka, Julija | |
| dc.contributor.author | Vembris, Aivars | |
| dc.contributor.author | Kokars, Valdis | |
| dc.date.accessioned | 2020-08-19T17:47:04Z | |
| dc.date.available | 2020-08-19T17:47:04Z | |
| dc.date.issued | 2018 | |
| dc.description | This work has been supported by the European Regional Development Fund within the Activity 1.1.1.2 “Post-doctoral Research Aid” of the Specific Aid Objective 1.1.1 “To increase the research and innovative capacity of scientific institutions of Latvia and the ability to attract external financing, investing in human resources and infrastructure” of the Operational Programme “Growth and Employment” (No. 1.1.1.2/VIAA/1/16/035). Financial support provided by A. Riekstins SIA “Mikrotīkls” donation, administered by the University of Latvia is greatly appreciated. There are no conflicts of interest to declare. | en_US |
| dc.description.abstract | A series of 2,6-bis-styryl-4H-pyran-4-ylidene fragment containing glass-forming organic compounds with bonded amorphous phase promoting bulky triphenyl moieties through piperazine structural fragment [2-(2-(4-(bis(2-(trityloxy)ethyl)amino)styryl)-6-methyl-4H-pyran-4ylidene)malononitrile derivatives (DWK)-T dyes] in a form of (5,5,5-triphenylpentyl)piperazin-1-yl)styryl)-substituent attached to the 4H-pyran-4-yliden fragment in two-position have been synthesized and investigated as the potential light-amplification medium for organic solid-state lasers. DWK-T dye physical properties also depend on the structure of the other styryl-substituent attached to the 4H-pyran-4-ylidene backbone fragment in six-position. Thermal stability of synthesized dyes is above 312°C with the glass transitions from 97°C and up to 109°C. Obtained neat pure spin-cast films based on these compounds show photoluminescence with λmax in range from 672 to 695 nm, ASE λmax from 690 to 704 nm with ASE threshold values in range from 327 to 1091 μJ / cm2, which are mostly influenced by the nature of the electron transition characteristics of various four substituents in a 6-styryl-fragment. The proposed synthetic approach could be useful for obtaining chemically stable and covalently bonded bulky triphenyl group containing glassy dyes, while the synthetic design allows to acquire different nonsymmetric 2,6-bis-styryl-4H-pyran-4-ylidene fragment-containing compounds for red and infrared light-emitting and light amplification applications. | en_US |
| dc.description.sponsorship | European Regional Development Fund 1.1.1.2/VIAA/1/16/035; Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART² | en_US |
| dc.identifier.doi | 10.1117/1.JPE.8.046001 | |
| dc.identifier.issn | 1947-7988 | |
| dc.identifier.uri | https://dspace.lu.lv/dspace/handle/7/52433 | |
| dc.language.iso | eng | en_US |
| dc.publisher | SPIE | en_US |
| dc.relation | info:eu-repo/grantAgreement/EC/H2020/739508/EU/Centre of Advanced Material Research and Technology Transfer/CAMART² | en_US |
| dc.relation.ispartofseries | Journal of Photonics for Energy;8 (4), 046001 | |
| dc.rights | info:eu-repo/semantics/openAccess | en_US |
| dc.subject | Research Subject Categories::NATURAL SCIENCES:Physics | en_US |
| dc.subject | 4 H -pyran-4-ylidene | en_US |
| dc.subject | amplified spontaneous emission | en_US |
| dc.subject | laser dyes | en_US |
| dc.subject | molecular glasses | en_US |
| dc.subject | triphenyl moieties | en_US |
| dc.subject | piperazine moieties | en_US |
| dc.title | Glass-forming nonsymmetric DWK-dyes with 5,5,5-triphenylpentyl and piparazine moieties for light-amplification studies | en_US |
| dc.type | info:eu-repo/semantics/article | en_US |