- n,?-Conjugation in N-methylvinylamine. A photoelectron spectroscopic study
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The unstable species N-methylvinylamine was prepared by the thermal decomposition of gaseous 2-methylaziridine in a flow system its UV photoelectron spectrum was recorded.The first two bands were observed at 8.00 and 11.00 eV.The methyl substituent shows the effect of reducing the degree of conjugation between the nN and ?CC orbitals, as revealed by a comparison with the spectrum of the parent compound vinylamine.
- Fang, Jiye,Sim, Cher Whee,Mok, Chup Yew,Huang, Hsing Hua,Novak, Igor
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p. 1625 - 1628
(2007/10/02)
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- Water-soluble fast polymeric black colorant, its preparation and use in dyes and inks
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A family of polymeric black colorants is disclosed. The subject colorants are composed of an organic polymer backbone comprised of a plurality of aromatic rings from which depend via azo groups a plurality of chromophore units having the structure STR1 wherein M is hydrogen or preferably a cation. These polymeric colorants are water-soluble, and noncrystalline and form dyes and inks that are fast to paper stock.
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- Orange anthrapyridine monomeric colorants and colorant precursors
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Orange colors having the anthrapyridine structure STR1 are disclosed wherein R1 and R2 are independently selected from among hydrogen, halos, lower alkyls, lower alkoxies, nitros, and sulfonates, R3 and R4 are independently selected from hydrogens, alkyls and alkylsulfonates of 1 through 3 carbon atoms and R5 is a lower alkyl or lower alkyl sulfonate.
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- Polymeric aminoanthrapyridine orange colors
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Polymeric orange colors are disclosed having a noncrosslinked organic polymer backbone to which is covalently bonded a plurality of chromophores having a particular anthrapyridine structure. The colors are represented structurally as STR1 wherein R1 and R2 are independently selected from among hydrogen, halos, lower alkyls, lower alkoxies, nitros, and sulfonates; R3 is selected from hydrogen, alkyls and alkylsulfonates; R5 is a lower alkyl or lower alkyl sulfonate and R4 is a noncrosslinked organic polymer linking a plurality (k) of said anthrapyridines into a polymeric colorant. The polymeric colorants are especially useful as nonabsorbable orange colorants for edibles.
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- Water-soluble amine-linked polymeric colorants
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Polymeric colorants comprising a hydrocarbon backbone and attached directly thereto through amine linkages, at least one water-solubilizing group and at least one optically chromophoric group are disclosed. In a preferred embodiment, the backbone is a saturated aliphatic hydrocarbon, the chromophore is an anthraquinone chromophore and the solubilizing group is a sulfonate or sulfamate residue.
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