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The different proportion methylpyrimidine ring copolymers has been synthesized and characterized by 1HNMR, 13CNMR and FT-IR spectrum. The detection limit of P80 for Al3+ ions of 7.94 × 10–8 M at the dichloromethane solution. The binding constant (Kb) between copolymers and with Al3+ was 1.10 × 104 M–1. The EDS analysis and XPS spectroscopy can expose that the copolymer and Al3+ had been coordination with each other. The neutral polymers with good recovery properties can be used as sensor detect Al3+ in the organic solvent. The methanol-soluble polymer has been synthesized from methylpyrimidine ring copolymers, and investigated acidochromic properties and found that the acidochromic property of the polymer was retained after quaternization, but cannot detect Al3+ in the methanol (MeOH). The methanol-soluble polymers using environment-friendly solvents such as methanol can be used in detect H+ in the methanol.

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An effective route to decorate and selectively separate alcohol-soluble sc-SWCNTs has been proposed.

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