Synthesis of a diazacrown ether containing polymers and formation of complexes with alkaline earth metals

Chan, Suk Hang; Lam, Lillian Sze Man; Wong, Wing Tak; Chan, Wai Kin

doi:10.1002/1521-3927(20001001)21:15<1075::aid-marc1075>3.0.co;2-y

Cited by 5 publications

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“…After similar treatment, a blue-colored material was also obtained, and designated as PI-doped CoPc(tBu) 4 .…”

Section: Resultsmentioning

confidence: 99%

“…The amount of CoPc attached to the polymer backbone was estimated using UV-vis spectroscopy (Figure 2) by comparing the absorption spectrum of PI-CoPc (solid line) with solutions of PI doped with different weight percentages of CoPc(tBu) 4 in DMF. The UV-vis experiments showed that around 16 wt.-% of CoPc was incorporated into the copolymer.…”

Section: Resultsmentioning

confidence: 99%

“…UV-vis spectra (Q band) of PI-CoPc (solid line) and solutions of PI containing different weight percentages of CoPc(tBu)4 in DMF.…”

mentioning

confidence: 99%

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Novel Cobalt (II) Phthalocyanine‐Containing Polyimides: Synthesis, Characterization, Thermal and Optical Properties

Maya

Torre

Lozano

et al. 2006

Macromol. Rapid Commun.

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A novel class of polymer has been prepared by reaction of a copolyimide containing carboxylic acid groups, and a cobalt phthalocyanine peripherally substituted with a reactive hydroxyl group. The incorporation of the phthalocyanine ring was achieved by esterification of the carboxylic acid groups of the polyimide with the free hydroxyl group of the phthalocyanine. In this work, a limited number of phthalocyanine rings have been introduced in order to avoid extensive modification of the copolyimide properties. The extent of modification (percentage of esterified carboxylic groups) was estimated to be about 18%. The resulting material showed good thermal stability and a high glass transition temperature (above 300 8C). The incorporation of the bulky phthalocyanine ring brought about a light decrease of thermal properties, relative to those of the initial polyimide. The presence of phthalocyanine was confirmed by the absorption band at 670 nm showing in the visible region for the modified polyimide. The novel copolyimide also exhibited a remarkable emission peak at 430 nm, when excited at 350 nm, corresponding to the emission of the cobalt phthalocyanine moiety.Schematic representation of the PI-CoPc molecule and the chemical structure of the repeat unit.

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“…After similar treatment, a blue-colored material was also obtained, and designated as PI-doped CoPc(tBu) 4 .…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%