FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1992803211> ?p ?o ?g. }

• W1992803211 endingPage "360" @default.
• W1992803211 startingPage "350" @default.
• W1992803211 abstract "The amino-imino tautomerization of the 4-aminopyrimidine (4APM)/acetic acid (AcOH) system through dual hydrogen bonding in n-hexane at room temperature was investigated using UV absorption and fluorescence spectroscopies, fluorescence time-profile measurements, and molecular orbital calculations, with those of the imino-model compound of 3-methyl-4(1H)-pyrimidinimine (3M4PMI). From the experimental results, it was confirmed that the imino-tautomer was formed in the first excited singlet state (S1) state through the double-proton transfer of the dual hydrogen-bonded complex of 4APM with AcOH. The fluorescences of the free 4APM monomer (band maximum at 353nm), imino-tautomer (at 414nm), and 3M4PMI monomer (at 437nm) exhibit the single-exponential decays of 98, 73, and 19ps time constants, respectively. The shorter decay time of the imino-tautomer fluorescence compared with the free monomer one is suggestive of the low activation energy process in the S1 state. From the result of the shortest decay time of the 3M4PMI fluorescence, it can be deduced that 3M4PMI has a non-planar structure in the S1 state. The theoretical calculations on the S0 and S1 state double-proton transfer for the 4APM/AcOH dual hydrogen-bonded system were performed with the use of formic acid (FoOH) in place of AcOH for the sake of simplicity. Only one peak of transition state was resolved in the S0 and S1 states. The energy barrier for the S1 state double-proton transfer of the 4APM/FoOH complex-->3H-4(1H)-pyrimidinimine/FoOH tautomer was estimated to be approximately 2kJmol(-1) using the CIS/6-31G(d) methods. On the other hand, the energy barrier for the S0 state reverse proton transfer of the 3H-4(1H)-pyrimidinimine/FoOH tautomer-->4APM/FoOH complex was estimated to be almost zero kJmol(-1) at B3LYP/6-31G(d) level." @default.
• W1992803211 created "2016-06-24" @default.
• W1992803211 creator A5004716804 @default.
• W1992803211 creator A5025675694 @default.
• W1992803211 creator A5046656967 @default.
• W1992803211 creator A5060668398 @default.
• W1992803211 creator A5085210386 @default.
• W1992803211 date "2008-02-01" @default.
• W1992803211 modified "2023-10-15" @default.
• W1992803211 title "Amino–imino tautomerization reaction of the 4-aminopyrimidine/acetic acid system" @default.
• W1992803211 cites W1508530088 @default.
• W1992803211 cites W1981463492 @default.
• W1992803211 cites W1986997304 @default.
• W1992803211 cites W1990516886 @default.
• W1992803211 cites W1991372819 @default.
• W1992803211 cites W1999090137 @default.
• W1992803211 cites W2006282092 @default.
• W1992803211 cites W2006718590 @default.
• W1992803211 cites W2007075394 @default.
• W1992803211 cites W2009442202 @default.
• W1992803211 cites W2016083459 @default.
• W1992803211 cites W2018856466 @default.
• W1992803211 cites W2021686384 @default.
• W1992803211 cites W2026720617 @default.
• W1992803211 cites W2028674717 @default.
• W1992803211 cites W2034613292 @default.
• W1992803211 cites W2040001988 @default.
• W1992803211 cites W2041228187 @default.
• W1992803211 cites W2045944811 @default.
• W1992803211 cites W2046206063 @default.
• W1992803211 cites W2048358673 @default.
• W1992803211 cites W2048834113 @default.
• W1992803211 cites W2051769308 @default.
• W1992803211 cites W2057723494 @default.
• W1992803211 cites W2068003057 @default.
• W1992803211 cites W2069288752 @default.
• W1992803211 cites W2074436183 @default.
• W1992803211 cites W2075353714 @default.
• W1992803211 cites W2080834494 @default.
• W1992803211 cites W2089965591 @default.
• W1992803211 cites W2090672719 @default.
• W1992803211 cites W2091549552 @default.
• W1992803211 cites W2118873155 @default.
• W1992803211 cites W2118997899 @default.
• W1992803211 cites W2170262286 @default.
• W1992803211 cites W2397488490 @default.
• W1992803211 cites W2951374440 @default.
• W1992803211 cites W2952412492 @default.
• W1992803211 cites W4318444835 @default.
• W1992803211 doi "https://doi.org/10.1016/j.saa.2007.04.006" @default.
• W1992803211 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17544320" @default.
• W1992803211 hasPublicationYear "2008" @default.
• W1992803211 type Work @default.
• W1992803211 sameAs 1992803211 @default.
• W1992803211 citedByCount "14" @default.
• W1992803211 countsByYear W19928032112012 @default.
• W1992803211 countsByYear W19928032112013 @default.
• W1992803211 countsByYear W19928032112014 @default.
• W1992803211 countsByYear W19928032112015 @default.
• W1992803211 crossrefType "journal-article" @default.
• W1992803211 hasAuthorship W1992803211A5004716804 @default.
• W1992803211 hasAuthorship W1992803211A5025675694 @default.
• W1992803211 hasAuthorship W1992803211A5046656967 @default.
• W1992803211 hasAuthorship W1992803211A5060668398 @default.
• W1992803211 hasAuthorship W1992803211A5085210386 @default.
• W1992803211 hasConcept C111233374 @default.
• W1992803211 hasConcept C112887158 @default.
• W1992803211 hasConcept C121332964 @default.
• W1992803211 hasConcept C166940927 @default.
• W1992803211 hasConcept C178790620 @default.
• W1992803211 hasConcept C181500209 @default.
• W1992803211 hasConcept C185544564 @default.
• W1992803211 hasConcept C185592680 @default.
• W1992803211 hasConcept C32909587 @default.
• W1992803211 hasConcept C33062035 @default.
• W1992803211 hasConcept C521977710 @default.
• W1992803211 hasConcept C54516573 @default.
• W1992803211 hasConcept C62520636 @default.
• W1992803211 hasConcept C71240020 @default.
• W1992803211 hasConcept C75473681 @default.
• W1992803211 hasConcept C91881484 @default.
• W1992803211 hasConceptScore W1992803211C111233374 @default.
• W1992803211 hasConceptScore W1992803211C112887158 @default.
• W1992803211 hasConceptScore W1992803211C121332964 @default.
• W1992803211 hasConceptScore W1992803211C166940927 @default.
• W1992803211 hasConceptScore W1992803211C178790620 @default.
• W1992803211 hasConceptScore W1992803211C181500209 @default.
• W1992803211 hasConceptScore W1992803211C185544564 @default.
• W1992803211 hasConceptScore W1992803211C185592680 @default.
• W1992803211 hasConceptScore W1992803211C32909587 @default.
• W1992803211 hasConceptScore W1992803211C33062035 @default.
• W1992803211 hasConceptScore W1992803211C521977710 @default.
• W1992803211 hasConceptScore W1992803211C54516573 @default.
• W1992803211 hasConceptScore W1992803211C62520636 @default.
• W1992803211 hasConceptScore W1992803211C71240020 @default.
• W1992803211 hasConceptScore W1992803211C75473681 @default.
• W1992803211 hasConceptScore W1992803211C91881484 @default.
• W1992803211 hasIssue "2" @default.

• next