1967
DOI: 10.1002/hlca.19670500804
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IR.‐spektroskopische Untersuchungen in der Chinophtalon‐Reihe

Abstract: Es wurden einige bekannte Chinophtalone z. T. auf modifizierte Art hergestellt und IR.‐spektroskopisch mit einer Anzahl neuerer, chinophtalon‐artig gebauter Farbstoffe aus der Reihe der Pyromellitsäure, Naphtalin‐ und Perylen‐tetracarbonsäure verglichen.

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Cited by 17 publications
(7 citation statements)
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“…It can be swti from Table 2 that On the other hand indandione compounds, such as N-inethylquinophthalone, where formation of intramolecular H-bonds isnot possible showv(c,o) at 1677 c l r l [7]. Literature data for other derivatives of quinophthalone also give additionalevidence supporting the formation of inter-and not intramolecular H-bonds [15].…”
Section: -Q 0 -H'mentioning
confidence: 91%
“…It can be swti from Table 2 that On the other hand indandione compounds, such as N-inethylquinophthalone, where formation of intramolecular H-bonds isnot possible showv(c,o) at 1677 c l r l [7]. Literature data for other derivatives of quinophthalone also give additionalevidence supporting the formation of inter-and not intramolecular H-bonds [15].…”
Section: -Q 0 -H'mentioning
confidence: 91%
“…In both cases, the structure with hydrogen attached to nitrogen is energetically favored, in agreement with the literature. 29,30 All optimized geometries and single-point energies are given in the Supporting Information. Following a recent benchmark study, 51 ionization energies are calculated by TDDFT using the Minnesota functional M06-2x 52 and the def2-TZVP basis set.…”
Section: The Journal Of Physical Chemistry Lettersmentioning
confidence: 99%
“…The results suggest that the planar enamino structure, with the hydrogen located at the nitrogen atom, is favored in the QY, similar to the results reported for quinophthalone. 30,31 The influence of sulfonation on molecular structure appears to be negligible. Vertical ionization energies of the relevant molecular orbitals are shown in Figure 2 as sticks.…”
mentioning
confidence: 99%
“…Their ability to act as ligands that form stable complexes with different cations is also well known [ 12 ]. Several methods for the preparation of quinophthalones have been reported such as treatment of phthalic anhydrides and a mixture of quinaldine with nitrobenzene [ 13 ], ZnCl 2 [ 14 , 15 , 16 , 17 ] or sodium hydride [ 18 ] and reactions of quinoline N-oxides/β-diketones [ 19 ]. Some of the methods mentioned above suffer from various drawbacks including long reaction times, low yield of products, difficult operating conditions and tedious work-up.…”
Section: Introductionmentioning
confidence: 99%