FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2000286537> ?p ?o ?g. }

• W2000286537 endingPage "2297" @default.
• W2000286537 startingPage "2288" @default.
• W2000286537 abstract "A study of the spectroscopy and photophysics of thiophene−fluorene oligomers as well as the respective molecules incorporated in polyesters are reported. The same oligomers having carbonyl groups at both ends of the molecules have also been studied. These molecules provide a better correlation with their corresponding polyesters. The first absorption band of each derivative can be assigned to the S1 ← S0 electronic transition computed from ZINDO/S calculations performed on the optimized geometries (HF/6-31G*). This transition corresponds mainly to the promotion of an electron from the HOMO to the LUMO and is strongly allowed and polarized along the long axis of the molecular frame. The insertion of alkyl lateral chains at the 3-position of the thiophene rings caused a torsion of the backbone of the oligomers, which induces a blue shift of the absorption band. From fluorescence data, it is observed that a more planar conformation is favored in the relaxed excited states. The increase of the oligomer chain or the addition of carbonyl groups at both ends of the molecules induces a red shift of the spectra due to an increase in the electronic delocalization along the molecular frame. It was shown by HF/6-31G* ab initio calculations that the length of the oligomer chain and/or the presence of carbonyl groups do not significantly influence the ground state molecular conformation. In the polyesters, thiophene−fluorene units have about the same spectral positions as those of the corresponding esters indicating that the oligomers are well isolated in the polyester chain. Fluorescence quantum yields and lifetimes of methyl-substituted derivatives are smaller than those of the unsubstituted molecules. Similarly, these photophysical parameters are smaller for the polyesters compared to those of the respective esters. In these systems, the photophysical properties are mainly governed by nonradiative processes. However the luminescence of the polyesters remains relatively intense making them suitable for LED materials." @default.
• W2000286537 created "2016-06-24" @default.
• W2000286537 creator A5015300709 @default.
• W2000286537 creator A5025383209 @default.
• W2000286537 creator A5026549572 @default.
• W2000286537 creator A5045497271 @default.
• W2000286537 creator A5080643521 @default.
• W2000286537 creator A5087201687 @default.
• W2000286537 date "2001-03-01" @default.
• W2000286537 modified "2023-10-05" @default.
• W2000286537 title "Spectroscopic and Photophysical Properties of Thiophene−Fluorene Oligomers as well as Their Corresponding Polyesters" @default.
• W2000286537 cites W1499283338 @default.
• W2000286537 cites W1968259945 @default.
• W2000286537 cites W1969468634 @default.
• W2000286537 cites W1982288771 @default.
• W2000286537 cites W1982446111 @default.
• W2000286537 cites W1983706723 @default.
• W2000286537 cites W1983820975 @default.
• W2000286537 cites W1985245101 @default.
• W2000286537 cites W1986966508 @default.
• W2000286537 cites W1991845708 @default.
• W2000286537 cites W1992139458 @default.
• W2000286537 cites W1992364044 @default.
• W2000286537 cites W1992376778 @default.
• W2000286537 cites W1994179563 @default.
• W2000286537 cites W1994266851 @default.
• W2000286537 cites W1995772026 @default.
• W2000286537 cites W2001154320 @default.
• W2000286537 cites W2001245848 @default.
• W2000286537 cites W2005915041 @default.
• W2000286537 cites W2008208807 @default.
• W2000286537 cites W2020878871 @default.
• W2000286537 cites W2022551382 @default.
• W2000286537 cites W2023129624 @default.
• W2000286537 cites W2025805364 @default.
• W2000286537 cites W2026019138 @default.
• W2000286537 cites W2027265873 @default.
• W2000286537 cites W2031672547 @default.
• W2000286537 cites W2032592794 @default.
• W2000286537 cites W2038166102 @default.
• W2000286537 cites W2053323976 @default.
• W2000286537 cites W2062313201 @default.
• W2000286537 cites W2063086038 @default.
• W2000286537 cites W2065247513 @default.
• W2000286537 cites W2067864327 @default.
• W2000286537 cites W2067881687 @default.
• W2000286537 cites W2072183699 @default.
• W2000286537 cites W2074575265 @default.
• W2000286537 cites W2076204810 @default.
• W2000286537 cites W2079324380 @default.
• W2000286537 cites W2083869843 @default.
• W2000286537 cites W2084135044 @default.
• W2000286537 cites W2086649099 @default.
• W2000286537 cites W2141799958 @default.
• W2000286537 cites W3023854223 @default.
• W2000286537 cites W4379356424 @default.
• W2000286537 doi "https://doi.org/10.1021/ma001042a" @default.
• W2000286537 hasPublicationYear "2001" @default.
• W2000286537 type Work @default.
• W2000286537 sameAs 2000286537 @default.
• W2000286537 citedByCount "45" @default.
• W2000286537 countsByYear W20002865372012 @default.
• W2000286537 countsByYear W20002865372014 @default.
• W2000286537 countsByYear W20002865372015 @default.
• W2000286537 countsByYear W20002865372016 @default.
• W2000286537 countsByYear W20002865372018 @default.
• W2000286537 countsByYear W20002865372020 @default.
• W2000286537 countsByYear W20002865372022 @default.
• W2000286537 crossrefType "journal-article" @default.
• W2000286537 hasAuthorship W2000286537A5015300709 @default.
• W2000286537 hasAuthorship W2000286537A5025383209 @default.
• W2000286537 hasAuthorship W2000286537A5026549572 @default.
• W2000286537 hasAuthorship W2000286537A5045497271 @default.
• W2000286537 hasAuthorship W2000286537A5080643521 @default.
• W2000286537 hasAuthorship W2000286537A5087201687 @default.
• W2000286537 hasConcept C119394753 @default.
• W2000286537 hasConcept C14158195 @default.
• W2000286537 hasConcept C178790620 @default.
• W2000286537 hasConcept C185592680 @default.
• W2000286537 hasConcept C188027245 @default.
• W2000286537 hasConcept C2776211377 @default.
• W2000286537 hasConcept C2778627677 @default.
• W2000286537 hasConcept C2779953032 @default.
• W2000286537 hasConcept C2780263894 @default.
• W2000286537 hasConcept C2780642029 @default.
• W2000286537 hasConcept C2781442258 @default.
• W2000286537 hasConcept C32909587 @default.
• W2000286537 hasConcept C521977710 @default.
• W2000286537 hasConcept C70050531 @default.
• W2000286537 hasConcept C75473681 @default.
• W2000286537 hasConcept C8010536 @default.
• W2000286537 hasConceptScore W2000286537C119394753 @default.
• W2000286537 hasConceptScore W2000286537C14158195 @default.
• W2000286537 hasConceptScore W2000286537C178790620 @default.
• W2000286537 hasConceptScore W2000286537C185592680 @default.
• W2000286537 hasConceptScore W2000286537C188027245 @default.
• W2000286537 hasConceptScore W2000286537C2776211377 @default.
• W2000286537 hasConceptScore W2000286537C2778627677 @default.

• next