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合成了1～3代的嵌段树枝状分子聚苄醚-聚脂肪酯(Gx-PBE-b-Gx-PMPA,x=1,2,3)和两亲嵌段树枝状分子聚苄醚-周边含羟基的聚脂肪酯[Gx-PBE-b-Gx-PMPA(OH)2x,x=1,2,3].PMPA(OH)2x-树枝片(Den-dron)段周边的羟基数目分别是2,4和8.通过1H NMR,13C NMR,FTIR和基质辅助激光解吸附电离飞行时间质谱(MALDI-TOF)(或场解析电离质谱)技术表征了Gx-PBE-b-Gx-PMPA和Gx-PBE-b-Gx-PMPA(OH)2x的结构.同时,采用变温FTIR光谱研究了在两亲嵌段树枝状分子中形成的氢键模式.结果表明,随着树枝片代数的增加,两亲嵌段树枝状分子内趋向于形成作用较弱的分子内氢键,说明形成3代两亲嵌段树枝状分子的三维结构削弱了羟基形成分子间氢键的能力.
The poly (benzyl ether) -polyester (Gx-PBE-b-Gx-PMPA, x = 1,2,3) was synthesized from 1 to 3 generations and the amphiphilic diblock copolymer The number of hydroxyl groups in the periphery of the PDMPA (OH) 2x-Den-dron segment were respectively Are 2, 4 and 8. The Gx-PBE-b-Gx-PMPA and / or Gx-PMPA are characterized by 1H NMR, 13C NMR, FTIR and matrix- assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF) The structure of Gx-PBE-b-Gx-PMPA (OH) 2x was also studied. At the same time, the temperature-mode FTIR spectroscopy was used to study the hydrogen bonding mode formed in the amphiphilic dendrimer. The results showed that with the increase of dendrite algebra, The amphiphilic dendritic molecules tended to form intramolecular hydrogen bonds with weaker intramolecular hydrogen bonds, indicating that the three-dimensional structure of the third-generation amphiphilic dendritic molecules impaired the ability of the hydroxyl groups to form intermolecular hydrogen bonds.