FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1986922675> ?p ?o ?g. }

• W1986922675 endingPage "327" @default.
• W1986922675 startingPage "299" @default.
• W1986922675 abstract "Abstract The heat capacity of N-(2-hydroxy-4-methoxybenzylildene)-4′-butylaniline(2,4-OHMBBA) with a purity of 99.393 mole % was measured between 13 and 375 K. The Melting point T m was 314.30 K, and the enthalpy and the entropy of fusion were 22.405 kJ mol−1 and 71.425 J K−1 mol−1, respectively. The temperature of transition from nematic to isotropic liquid was 33.65 ± 0.1 K, and the enthalpy and the entropy changes due to this mesophase transition were 887.4 ± 4.9 J mol−1 and 2.690 ± 0.015 J K−1 mol−1, respectively. A second-order character has been postulated for the mesophase transition. By cooling the nematic liquid crystal at a rate of − 12.2 K min−1 a frozen-in state of the stable nematic phase, i.e. a glassy state, was realized. The glass transition temperature Tg was 204 K and the heat capacity jump at T g was Δ C = 107 J K−1 mol−1. The activation enthalpy for the glass transition was estimated to be Δ H = 75 kJ mol−1. The residual entropy of the glassy state at O K was determined to be 12.69 ± 0.16 J K−1 mol −1. The enthalpy of the glassy state at O K was 11.38 ± 0.04 kJ mol−1 higher than that of crystal. The term Glassy liquid crystal is proposed here to indicate a glassy state of this kind. To elucidate the relationship between molecular structure and liquid crystallinity 4 different 2,4-OHMBBA isomers were synthesized. None of them showed liquid crystallinity. From differential thermal analyses it was found that three of them exhibit a glassy state of isotropic liquid: 2,3-OHMBBA (T g = 230 K; T m = 320 K; Δ H = 85 kJ mol−1), 2,5- OHMBBA (218 K; 321.7 K; 90 kJ Mol−1), and 4.3-OHMBBA (265 K; 357.7 K; 73 kJ Mol−1). 3.4-OHMBBA gave no glassy state but a solid-solid transition at 333 K was noted. The material melted at 349 K. 3,4-OHMBBA obtained from the melt exhibited a transiton between metastable crystalline phases at 216 K." @default.
• W1986922675 created "2016-06-24" @default.
• W1986922675 creator A5021181719 @default.
• W1986922675 creator A5057676767 @default.
• W1986922675 date "1973-01-01" @default.
• W1986922675 modified "2023-10-17" @default.
• W1986922675 title "Heat Capacity of N-(<i>o</i>-Hydroxy-<i>p</i>-Methoxybenzylidene)-<i>p</i>-Butylaniline: A Glassy Nematic Liquid Crystal" @default.
• W1986922675 cites W1734517369 @default.
• W1986922675 cites W1889460427 @default.
• W1986922675 cites W1966514982 @default.
• W1986922675 cites W1967303178 @default.
• W1986922675 cites W1979243386 @default.
• W1986922675 cites W1980550500 @default.
• W1986922675 cites W1993394336 @default.
• W1986922675 cites W2000136686 @default.
• W1986922675 cites W2000838576 @default.
• W1986922675 cites W2002412276 @default.
• W1986922675 cites W2007425222 @default.
• W1986922675 cites W2013067162 @default.
• W1986922675 cites W2013715565 @default.
• W1986922675 cites W2014560156 @default.
• W1986922675 cites W2015410076 @default.
• W1986922675 cites W2016710243 @default.
• W1986922675 cites W2037120273 @default.
• W1986922675 cites W2039154328 @default.
• W1986922675 cites W2039343235 @default.
• W1986922675 cites W2041792263 @default.
• W1986922675 cites W2042457772 @default.
• W1986922675 cites W2042517503 @default.
• W1986922675 cites W2045225879 @default.
• W1986922675 cites W2053664168 @default.
• W1986922675 cites W2058299407 @default.
• W1986922675 cites W2061182053 @default.
• W1986922675 cites W2064136077 @default.
• W1986922675 cites W2085284747 @default.
• W1986922675 cites W2085655915 @default.
• W1986922675 cites W2089811118 @default.
• W1986922675 cites W2091704814 @default.
• W1986922675 cites W2095535471 @default.
• W1986922675 cites W2111811356 @default.
• W1986922675 cites W2162956244 @default.
• W1986922675 cites W2335605975 @default.
• W1986922675 cites W2580348395 @default.
• W1986922675 cites W4238139949 @default.
• W1986922675 cites W592015125 @default.
• W1986922675 doi "https://doi.org/10.1080/15421407308083379" @default.
• W1986922675 hasPublicationYear "1973" @default.
• W1986922675 type Work @default.
• W1986922675 sameAs 1986922675 @default.
• W1986922675 citedByCount "76" @default.
• W1986922675 countsByYear W19869226752013 @default.
• W1986922675 countsByYear W19869226752015 @default.
• W1986922675 countsByYear W19869226752016 @default.
• W1986922675 countsByYear W19869226752017 @default.
• W1986922675 countsByYear W19869226752018 @default.
• W1986922675 countsByYear W19869226752019 @default.
• W1986922675 countsByYear W19869226752020 @default.
• W1986922675 countsByYear W19869226752021 @default.
• W1986922675 countsByYear W19869226752022 @default.
• W1986922675 crossrefType "journal-article" @default.
• W1986922675 hasAuthorship W1986922675A5021181719 @default.
• W1986922675 hasAuthorship W1986922675A5057676767 @default.
• W1986922675 hasConcept C113196181 @default.
• W1986922675 hasConcept C121332964 @default.
• W1986922675 hasConcept C122865956 @default.
• W1986922675 hasConcept C124589349 @default.
• W1986922675 hasConcept C129564387 @default.
• W1986922675 hasConcept C13274807 @default.
• W1986922675 hasConcept C13530604 @default.
• W1986922675 hasConcept C147789679 @default.
• W1986922675 hasConcept C178790620 @default.
• W1986922675 hasConcept C185592680 @default.
• W1986922675 hasConcept C192562407 @default.
• W1986922675 hasConcept C3288061 @default.
• W1986922675 hasConcept C3535393 @default.
• W1986922675 hasConcept C38139870 @default.
• W1986922675 hasConcept C49040817 @default.
• W1986922675 hasConcept C521977710 @default.
• W1986922675 hasConcept C60205243 @default.
• W1986922675 hasConcept C8010536 @default.
• W1986922675 hasConcept C97355855 @default.
• W1986922675 hasConcept C97785096 @default.
• W1986922675 hasConceptScore W1986922675C113196181 @default.
• W1986922675 hasConceptScore W1986922675C121332964 @default.
• W1986922675 hasConceptScore W1986922675C122865956 @default.
• W1986922675 hasConceptScore W1986922675C124589349 @default.
• W1986922675 hasConceptScore W1986922675C129564387 @default.
• W1986922675 hasConceptScore W1986922675C13274807 @default.
• W1986922675 hasConceptScore W1986922675C13530604 @default.
• W1986922675 hasConceptScore W1986922675C147789679 @default.
• W1986922675 hasConceptScore W1986922675C178790620 @default.
• W1986922675 hasConceptScore W1986922675C185592680 @default.
• W1986922675 hasConceptScore W1986922675C192562407 @default.
• W1986922675 hasConceptScore W1986922675C3288061 @default.
• W1986922675 hasConceptScore W1986922675C3535393 @default.
• W1986922675 hasConceptScore W1986922675C38139870 @default.
• W1986922675 hasConceptScore W1986922675C49040817 @default.
• W1986922675 hasConceptScore W1986922675C521977710 @default.

• next