Novel synthesis of poly(benzoin) and poly(benzil). Characterization and application as photosensitizer materials
Novel synthesis of poly(benzoin) and poly(benzil). Characterization and application as photosensitizer materials
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聚苯偶姻和聚苯偶酰的新合成。
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
M. Abd
中科院分区：
文献类型：
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作者：
M. Abd
以苯甲醛为原料，通过缩合反应制备了含苯偶姻或苯偶酰基团的新型光活性聚合物。研究了碱金属离子和溶剂对苯偶姻缩聚反应的影响。用硝酸或硝酸铵在乙酸中氧化该聚合物，以定量产率得到相应的聚（苯偶酰）2。通过元素分析、IR、1H NMR和UV/可见光谱数据证实了所得聚合物，并通过粘度、DTA测量、热重和X射线分析表征。用荧光光谱检测了聚合物的光敏性能。结果发现，聚（苯偶姻）在DMSO溶液中在285 nm处照射引起黄色荧光，而聚（苯偶酰）在相同的激发波长下不显示荧光。此外，还研究了聚苯偶酰作为光敏剂在硫脲及其衍生物光化学裂解反应中的应用。
New photoactive polymers containing benzoin or benzil groups have been prepared by condensation of terephthalaldehyde. The influence of the alkali metal ions and solvents used upon the progress of polycondensation and yield of poly(benzoin)1 were studied. Oxidation of this polymer by nitric acid or ammonium nitrate in acetic acid afforded the corresponding poly(benzil)2 in quantitative yield. The resulting polymers were confirmed by elemental analysis, IR, 1H NMR and UV/visible spectral data, and characterized using viscometry, DTA measurements, thermogravimetric and X-ray analysis. The photosensitizing property of the prepared polymers was detected by fluorescence. It was found that irradiation of poly(benzoin) in DMSO solution at 285 nm causes yellow fluorescence whereas poly(benzil) does not display fluorescence at the same excitation wavelength. Moreover, the use of poly(benzil) as photosensitizer material in the photochemical cleavage of thiourea and its derivatives was also studied.