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Challenge to Environmental and Resource Chemistry : Preparation, Modification, and Assessment of Bisguanidine Polymers

环境和资源化学的挑战：双胍聚合物的制备、改性和评估

基本信息

批准号：
21659029
负责人：
ISHIKAWA Tsutomu
金额：
$ 2.02万
依托单位：
Chiba University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Challenging Exploratory Research
财政年份：
2009
资助国家：
日本
起止时间：
2009 至 2011
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21659029/
关键词：
環境化学資源化学ビスグアニジン分子設計評価

项目摘要

In the course of our studies on guanidine chemistry we focused on (i) the preparation of magic filter for improvement of arsenic pollution in drinking water and (ii) selective and effective recovery of metal resources based on the potential ability of bisguanidines substituted by two guanidyl groups at ortho position of benzene ring as scavengers for not only acid (proton) but also metal ions. Calculation of aliphatic bisguanidines carrying methylene unit between the benzene ring and the guanidyl group showed that they could work as effective scavengers than aromatic bisguanidines lacking any methylene units. Thus, we synthesized a benzyl-type (one methylene unit) and phenylethyl-type (two methylene units) bisguanidine polymers and assessed their affinity to arsenic acid in water by detecting arsenic in the residue using ICP-MS after mixing a polymer and arsenic acid followed by liberation with acid. As a result, it was found that aliphatic bisguanidines were more effective than aromatic ones and a bisguanidine with a longer tether in comparison between the formers even not so large. Further optimization would be continued for our final purposes.

在胍化学的研究过程中，我们重点研究了(I)改善饮用水中砷污染的魔术过滤器的制备和(Ii)基于苯环邻位两个胍基取代的双胍作为酸(质子)和金属离子清除剂的潜力而选择性和有效地回收金属资源。在苯环和胍基之间带有亚甲基的脂肪族双胍的计算表明，它们比没有亚甲基团的芳香族双胍具有更好的清除剂作用。因此，我们合成了一种苄基型(一个亚甲基)和苯乙基型(两个亚甲基)双胍聚合物，并通过电感耦合等离子体质谱检测聚合物与砷酸混合后再用酸释放后的残留物中的砷来评价它们对水中砷酸的亲和力。结果发现，脂肪族双胍比芳香族和链长较长的双胍更有效，但前者并不是很大。为了我们的最终目的，将继续进行进一步的优化。