108780-83-2Relevant academic research and scientific papers
Synthesis and fluorescence study of conjugated polymers based on 2,4,6-triphenylpyridine moieties
Ran, Qianping,Ma, Jianfeng,Wang, Tao,Fan, Shimin,Yang, Yong,Qi, Shuai,Cheng, Yixiang,Song, Fengyan
, p. 6281 - 6288 (2016)
Three novel conjugated polymers based on 2,4,6-triphenylpyridine moieties were synthesized by a Pd-catalyzed Sonogashira coupling reaction. The three polymers P-1, P-2 and P-3 showed strong fluorescence emission with large Stokes' shifts and high quantum yields. We also performed a theoretical calculation analysis to predict the electrochemical and optical properties of the conjugated polymers. The results indicated that although the calculated energy levels were higher than those determined by experiments, the trends of P-1, P-2 and P-3 in the band gaps were in good agreement with the ones obtained by UV-vis and CV measurements of the polymers.
Synthesis and pH-dependent spectroscopic behavior of 2,4,6-trisubstituted pyridine derivatives
Chapman, Gala,Solomon, Isaac,Patonay, Gabor,Henary, Maged
, p. 861 - 872 (2015/05/26)
Seven 2,4,6-trisubstituted pyridine derivatives with N,N-diethylaniline substituents at the 4-position were synthesized, and their spectroscopic properties in the absence and presence of acid were studied. The spectral effects of protonation, molar absorptivities, pKa values, and the structural origins of the observed spectral behavior were ascertained. The pyridine nitrogen was found to be more basic than the diethylamino nitrogen atom. Protonation of the pyridine ring nitrogen is associated with the appearance of a red-shifted intramolecular charge transfer peak in the UV-visible spectra. Favorable color indicating properties result from electron-donating substitution at the 2 and 6 positions of pyridine, which provide a greater absorptivity of the red-shifted peak associated with protonation of the pyridine nitrogen. These findings will assist in the design and optimization of these compounds for ion-indicating and pH-sensing applications.
THERMOCHROMIC COMPOSITIONS FROM TRISUBSTITUTED PYRIDINE LEUCO DYES
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Paragraph 0036, (2013/04/13)
A thermochromic leuco dye composition contains a leuco dye moiety including one or more tri-aryl substituted pyridines, a UVA developer moiety including at least one UVA developer selected from the group consisting of salicylic acid and derivatives thereof, and biphenyls and derivatives thereof, and a carrier selected from the group consisting of a fatty ester, fatty alcohol, fatty amide, and combinations thereof.
