Formation of lubricating films at elevated temperatures from the gas phase

Klaus, E. E.; Naidu, S. K.; Munro, R. G.; Hsu, S. M.

doi:10.6028/nist.sp.744

Cited by 1 publication

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other bases (nucleophiles), such as sodium methoxide (NaOCH 3 ), were less effective than NaOH. The acidic condition using compounds such as trifluoromethanesulfonic acid (CF 3 SO 3 H) and zinc chloride (ZnCl 2 ) is known as another effective way for preparing triazine-containing compounds. − However, such conditions were not appropriate in the preparation of the triazine−amine conjugated polymers.…”

Section: Resultsmentioning

confidence: 99%

“…Various methods have been developed for trimerization of nitriles. − It is readily suspected that, under similar conditions, dinitriles lead to triazine-containing polymers by repeating the trimerization of nitriles. Some papers have suggested the existence of triazine-containing polymers. − However, the characterization is only the confirmation of triazine rings by the IR spectrum, and there are no reports on the isolation of individual oligomers from polymer mixtures. Moreover, despite the strong electron-accepting ability of triazine moieties, the optical properties of triazine-containing oligomers have not been investigated at all.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Highly Blue Luminescent Triazine−Amine Conjugated Oligomers

Murase

Fujita

2005

J. Org. Chem.

View full text Add to dashboard Cite

[Reaction: see text]. The novel synthetic strategy and optical properties of highly fluorescent, triazine-amine conjugated oligomers are described herein. Under basic conditions, aromatic dinitrile compounds, NC-C6H4-X-C6H4-CN (X = NMe, O, CH2), underwent cyclic trimerization of the cyano groups at both ends to give a series of triazine-containing oligomers. The oligomers can be expressed as (2n + 1) mer, where n represents the number of triazine rings in the oligomer. The absorption maximum of an amine-conjugated trimer (X = NMe, n = 1) was outstandingly red-shifted as compared with those of the other trimers (X = CH2, O). In acidic media, the amine-conjugated trimer showed two-step bathochromic shifts caused by protonation. The absorption maxima of the amine-conjugated (2n + 1) mers (X = NMe, n = 1-4) did not depend on n; instead, shoulder peaks appeared in the long-wavelength region when n 2. The oligomers involving alternate conjugation of triazines and NMe groups through phenylene groups showed strong fluorescence in chloroform. In particular, the pentamer was the most efficient blue emitter (PhiF = 0.82). The other triazine-containing oligomers (X = CH2, O) did not show fluorescence at all. Therefore, it is concluded that the emission properties are due to the strong electron-donating and accepting abilities of the NMe and triazine moieties, respectively.

show abstract

Section: Resultsmentioning

confidence: 99%